CN112689033B - Terminal device - Google Patents

Terminal device Download PDF

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Publication number
CN112689033B
CN112689033B CN201910996320.XA CN201910996320A CN112689033B CN 112689033 B CN112689033 B CN 112689033B CN 201910996320 A CN201910996320 A CN 201910996320A CN 112689033 B CN112689033 B CN 112689033B
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antenna
resonance
metal
gap
point
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CN112689033A (en
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张功磊
周大为
魏鲲鹏
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Honor Device Co Ltd
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Honor Device Co Ltd
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Abstract

The embodiment of the application provides a terminal device, the antenna at the top of the terminal device can provide a first resonance in a left-hand mode, a second resonance in a current loop mode and a third resonance in a slot mode, wherein the frequency after superposition of the first resonance, the second resonance and the third resonance comprises a first communication frequency, and the area of a radiator for realizing the first communication frequency is large, so that the radiation of the antenna at the top of the terminal device in all directions is uniform when the antenna works at the first communication frequency, the terminal device is on the basis of ensuring the OTA performance of the antenna, the SAR of a head mode and a head-hand mode is low, and the relevant standard of the SAR can be met without backspacing.

Description

Terminal device
Technical Field
The embodiment of the application relates to the technical field of antennas, in particular to a terminal device.
Background
With the rapid development of the wireless communication technology field, terminal devices such as mobile phones, tablet computers, personal handheld computers, and the like generally have multiple wireless communication functions such as cellular (cellular), Wireless Local Area Network (WLAN), bluetooth (bluetooth), and Global Positioning System (GPS). In order to realize the above wireless communication function, an antenna is an essential important component, and the antenna is usually built in a terminal device due to the demand for thinning of the terminal device. Further, as people continuously improve the appearance requirements of the terminal equipment, the terminal equipment with the metal frame and the metal rear cover is more and more favored by users. However, the metal frame and the metal rear cover may interfere with or shield electromagnetic waves radiated from the antenna, so that the performance of the antenna built in the terminal device is reduced, signals cannot be transmitted and received effectively, and the terminal device cannot communicate normally in a severe case.
In order to ensure normal communication of the terminal device, at present, a slot is formed in an edge accessory of a metal frame of the terminal device or slots are formed in positions, close to the top and the bottom, of a metal rear cover, and the isolated metal accessory is used as a part of an antenna radiator, so that the antenna can radiate effectively. When a user holds the terminal device to perform operations such as talking or browsing a web page, the radiation efficiency of the antenna may be reduced due to the fact that the hand and/or the head are closer to the antenna radiator, which affects the over the air technology (OTA) performance of the antenna.
Conventionally, the OTA performance of the antenna is ensured by increasing the antenna radiation power, but increasing the antenna radiation power makes it difficult for the electromagnetic absorption rate (SAR) to meet the relevant standard requirements.
Disclosure of Invention
The embodiment of the application provides a terminal device, which is used for effectively reducing SAR on the basis of ensuring the OTA performance of an antenna on the terminal device.
In a first aspect, an embodiment of the present application provides a terminal device, which includes a metal frame, where the metal frame is provided with a first gap, a second gap, a third gap, and a fourth gap, and the first gap, the second gap, the third gap, and the fourth gap divide the metal frame into a first metal frame section, a second metal frame section, a third metal frame section, and a fourth metal frame section, where the first gap and the second gap are located at a top edge of the metal frame, the third gap and the fourth gap are located at a bottom edge of the metal frame, the first metal frame section is located between the first gap and the fourth gap, the second metal frame section is located between the first gap and the second gap, and the third metal frame section is located between the second gap and the third gap, the fourth metal bezel segment is positioned between the third gap and the fourth gap;
A first grounding point and a fourth grounding point are arranged on the first metal frame section, the first grounding point is the grounding point which is closest to the first gap among the grounding points on the first metal frame section, the fourth grounding point is the grounding point which is closest to the fourth gap among the grounding points on the first metal frame section, the first radiation branch section comprises the metal frame section from the first grounding point on the first metal frame section to the first gap, and the fourth radiation branch section comprises the metal frame section from the fourth grounding point on the first metal frame section to the fourth gap;
a second grounding point and a third grounding point are arranged on the third metal frame section, the second grounding point is the grounding point which is closest to the second gap among the grounding points on the third metal frame section, the third grounding point is the grounding point which is closest to the third gap among the grounding points on the third metal frame section, the second radiation branch section comprises the metal frame section which is arranged between the second grounding point and the second gap on the third metal frame section, and the third radiation branch section comprises the metal frame section which is arranged between the third grounding point and the third gap on the third metal frame section;
The first radiation branch node is electrically connected with a first feed source through a first feed point, the first radiation branch node, the second metal frame section, the second radiation branch node, the first feed point and the first feed source form a part of a first antenna, the first radiation branch node is used for providing a first resonance in a left-hand mode, the second metal frame section is arranged in a suspension manner, the second metal frame section is used for providing a second resonance in a current loop mode, and the second radiation branch node is used for providing a third resonance in a gap mode;
the superimposed frequencies of the first resonance, the second resonance, and the third resonance comprise a first communication frequency;
the third radiation branch node is electrically connected with a third feed source through a third feed point, the third radiation branch node, the fourth metal frame section, the fourth radiation branch node, the third feed point and the third feed source form a part of a third antenna, the third radiation branch node is used for providing a fourth resonance in a left-hand mode, the fourth metal frame section is arranged in a suspended manner, the fourth metal frame section is used for providing a fifth resonance in a current loop mode, and the fourth radiation branch node is used for providing a sixth resonance in a gap mode;
The superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes the first communication frequency.
According to the first aspect, in a first embodiment of the first aspect, the first communication frequency comprises 1710 MHz-2690 MHz.
According to the first aspect or the first embodiment of the first aspect, in the second embodiment of the first aspect, the superimposed frequencies of the first resonance, the second resonance and the third resonance further include: 1575.42 MHz.
According to the first aspect, or the first embodiment of the first aspect, or the second embodiment of the first aspect, in a third embodiment of the first aspect, further comprising: a second feed point and a second feed source;
one end of the second radiation branch node, which is close to the second slot, is electrically connected with the second feed point through the second feed point, the second radiation branch node, the second feed point and the second feed source form part of a second antenna, the second antenna is further used for providing a seventh resonance in a left-hand mode, the frequency of the seventh resonance includes a second communication frequency, and the second communication frequency is different from the frequency range of the first communication frequency.
According to the first aspect and any one of the first to third embodiments of the first aspect, in a fourth embodiment of the first aspect, the method further comprises: a fourth feed point and a fourth feed source;
wherein one end of the fourth radiation branch near the fourth slot is electrically connected with the fourth feed point through the fourth feed point, and the fourth radiation branch, the fourth feed point and the fourth feed form a part of a fourth antenna,
the fourth antenna is further configured to provide an eighth resonance for a left-handed mode, a frequency of the eighth resonance including a third communication frequency that is different in frequency range from the first communication frequency.
According to the first aspect as well as any one of the first to fourth embodiments of the first aspect, in a fifth embodiment of the first aspect, one or more of the first, second, third and fourth antennas further comprise respective matching circuits;
if the first antenna further comprises a first matching circuit, the first radiating branch is connected with one end of the first matching circuit through the first feed point, and the other end of the first matching circuit is connected with the first feed source;
If the second antenna further comprises a second matching circuit, the second radiating branch is connected with one end of the second matching circuit through the second feed point, and the other end of the second matching circuit is connected with the second feed source;
if the third antenna further comprises a third matching circuit, the third radiating branch is connected with one end of the third matching circuit through the third feed point, and the other end of the third matching circuit is connected with the third feed source;
if the fourth antenna further includes a fourth matching circuit, the fourth radiation branch is connected to one end of the fourth matching circuit through the fourth feeding point, and the other end of the fourth matching circuit is connected to the fourth feed source.
According to the first aspect and any one of the first to fifth embodiments of the first aspect, in a sixth embodiment of the first aspect, the first antenna and/or the third antenna further include a corresponding antenna adjusting circuit, the antenna adjusting circuit includes at least one branch, and the antenna adjusting circuit is configured to conduct the corresponding branch according to an adjusting instruction of the terminal device to adjust a frequency of a resonance provided by the first antenna and/or the third antenna;
If the first antenna further comprises a first antenna adjusting circuit, the first radiation branch is respectively connected with one end of the first antenna adjusting circuit and one end of the first matching circuit through the first feed point, the other end of the first antenna adjusting circuit is grounded, and the first matching circuit is connected with the first feed source; or,
the first radiating branch is connected with one end of the first matching circuit through the first feed point, the other end of the first matching circuit is connected with the first feed source, the first radiating branch is connected with one end of the first antenna adjusting circuit through a first connecting point, and the other end of the first antenna adjusting circuit is grounded;
if the third antenna further comprises a third antenna adjusting circuit, the third radiation branch is respectively connected with one end of the third antenna adjusting circuit and one end of the third matching circuit through the third feed point, the other end of the third antenna adjusting circuit is grounded, and the third matching circuit is connected with the third feed source;
the third radiation branch knot is connected with one end of the third matching circuit through the third feed point, the other end of the third matching circuit is connected with the third feed source, the third radiation branch knot is connected with one end of the third antenna adjusting circuit through a third connection point, and the other end of the third antenna adjusting circuit is grounded.
According to the first aspect and any one of the first to sixth embodiments of the first aspect, in a seventh embodiment of the first aspect, a fifth gap is further disposed on the metal bezel, the fifth gap is disposed on the first metal bezel section or the third metal bezel section, and the fifth gap divides the first metal bezel section or the third metal bezel section into a fifth metal bezel section and a sixth metal bezel section;
a fifth grounding point is further arranged on the fifth metal frame section or the sixth metal frame section, and the fifth grounding point is the grounding point which is closest to the fifth gap among the grounding points on the fifth metal frame section or the sixth metal frame section;
the fifth radiation branch section comprises a metal frame section from the fifth grounding point to the fifth gap, the fifth radiation branch section is electrically connected with a fifth feed source through a fifth feed point to form a part of a fifth antenna, the fifth antenna is used for providing a ninth resonance of a left-hand mode, and the frequency of the ninth resonance comprises a fourth communication frequency.
According to a seventh embodiment of the first aspect, in the eighth embodiment of the first aspect, the fifth antenna further comprises a fifth matching circuit, the fifth radiating branch is connected to one end of the fifth matching circuit through the fifth feeding point, and the other end of the fifth matching circuit is connected to the fifth feed source.
According to a seventh embodiment of the first aspect or the eighth embodiment of the first aspect, in a ninth embodiment of the first aspect, the frequency of the seventh resonance comprises the second communication frequency, respectively the frequency of the ninth resonance comprises 1575.42MHz or 1176.45 MHz; alternatively, the frequency of the seventh resonance comprises 1575.42MHz or 1176.45MHz, and the frequency of the ninth resonance comprises the second communication frequency, wherein the second communication frequency is different from the frequency of the ninth resonance.
According to the first aspect and any one of the first to ninth embodiments of the first aspect, in a tenth embodiment of the first aspect, a sixth slit is further disposed on the metal bezel, the sixth slit is disposed on the first metal bezel section, and the sixth slit divides the first metal bezel section into a seventh metal bezel section and an eighth metal bezel section;
a sixth grounding point is further arranged on the seventh metal frame section or the eighth metal frame section, and the sixth grounding point is the grounding point which is closest to the sixth gap among the grounding points on the seventh metal frame section or the eighth metal frame section;
the sixth radiating branch section comprises a metal frame section from the sixth grounding point to the sixth gap, the sixth radiating branch section is electrically connected with the sixth feed source through the sixth feed point to form a part of a sixth antenna, the sixth antenna is used for providing a tenth resonance of a left-hand mode, and the frequency of the tenth resonance comprises a fifth communication frequency.
According to the first aspect and any one of the first to ninth embodiments of the first aspect, in an eleventh embodiment of the first aspect, a sixth slit is further disposed on the metal bezel section, the sixth slit is disposed on the third metal bezel section, and the sixth slit divides the third metal bezel section into a seventh metal bezel section and an eighth metal bezel section;
a sixth grounding point is further arranged on the seventh metal frame section or the eighth metal frame section, and the sixth grounding point is the grounding point which is closest to the sixth gap among the grounding points on the seventh metal frame section or the eighth metal frame section;
the sixth radiating branch section comprises a metal frame section from the sixth grounding point to the sixth gap, the sixth radiating branch section is electrically connected with the sixth feed source through the sixth feed point to form a part of a sixth antenna, the sixth antenna is used for providing a tenth resonance of a left-hand mode, and the frequency of the tenth resonance comprises a fifth communication frequency.
According to a tenth embodiment of the first aspect or the eleventh embodiment of the first aspect, in a twelfth embodiment of the first aspect, the sixth antenna further includes a sixth matching circuit, the sixth radiating branch is connected to one end of the sixth matching circuit through the sixth feeding point, and the other end of the sixth matching circuit is connected to the sixth feed source.
In a thirteenth embodiment of the first aspect, according to any of the tenth to twelfth embodiments of the first aspect, the fifth communication frequency comprises 2400MHz-2500 MHz.
The terminal device provided by the embodiment of the application, the antenna at the top can provide the first resonance in a left-hand mode, the second resonance in a current loop mode and the third resonance in a slot mode, wherein the frequency after the superposition of the first resonance, the second resonance and the third resonance comprises the first communication frequency, and the area of a radiator for realizing the first communication frequency is large, so that the antenna at the top of the terminal device can radiate uniformly in all directions when working at the first communication frequency, the terminal device is on the basis of ensuring the OTA performance of the antenna, the SAR in a head mode and a head-hand mode is low, and the relevant standard of the SAR can be met without backspacing power. The antenna at the bottom can provide the third resonance of left hand mode, the fourth resonance of current loop mode and the fifth resonance of gap mode, wherein, the frequency after third resonance, fourth resonance and the fifth resonance stack includes first communication frequency, the radiator area for realizing first communication frequency is great, consequently, the antenna work of terminal equipment bottom radiates at all aspects when first communication frequency evenly, terminal equipment is on the basis of the OTA performance of assurance antenna at first communication frequency, body SAR is lower, need not to roll back the relevant standard that power interface satisfied SAR.
In a second aspect, an embodiment of the present application provides a terminal device, which includes a metal rear cover, where a seventh slit, an eighth slit, a ninth slit, a tenth slit, an eleventh slit, and a twelfth slit are disposed on the metal rear cover, and the seventh slit, the eighth slit, the ninth slit, the tenth slit, the eleventh slit, and the twelfth slit divide the metal rear cover into a first metal unit, a second metal unit, a third metal unit, a fourth metal unit, a fifth metal unit, a sixth metal unit, and a seventh metal unit;
the seventh gap is arranged at the top of the metal rear cover, the extending direction of the seventh gap is parallel to the width direction of the metal rear cover, two ends of the seventh gap are respectively intersected with the edge of the metal rear cover, the eighth gap and the ninth gap are arranged at intervals along the width direction of the metal rear cover, one end of the eighth gap is intersected with the seventh gap, the other end of the eighth gap extends to the edge of the top of the metal rear cover, one end of the ninth gap is intersected with the seventh gap, and the other end of the ninth gap extends to the edge of the top of the metal rear cover;
The tenth gap is arranged at the bottom of the metal rear cover, the extending direction of the tenth gap is parallel to the width direction of the metal rear cover, two ends of the tenth gap are respectively intersected with the edge of the metal rear cover, the eleventh gap and the twelfth gap are arranged at intervals along the width direction of the metal rear cover, the eleventh gap is intersected with the tenth gap, the other end of the tenth gap extends to the edge of the bottom of the metal rear cover, the twelfth gap is intersected with the tenth gap, and the other end of the twelfth gap extends to the edge of the bottom of the metal rear cover,
the first metal unit is provided with a first grounding point, the first grounding point is positioned at a position, close to the side edge of the metal rear cover, on the first metal unit, one end, close to the eighth slot, on the first metal unit is electrically connected with a first feed source through a first feed point, the first metal unit, the second metal unit, the third metal unit, the first feed point and the first feed source form a part of a first antenna, the first metal unit is used for providing a first resonance in a left-hand mode, the second metal unit is arranged in a suspended manner, the second metal unit is used for providing a second resonance in a current loop mode, and the third metal unit is used for providing a third resonance in a slot mode;
The superposed frequency of the first resonance, the second resonance and the third resonance comprises a first communication frequency;
the fourth metal unit is provided with a third grounding point, the third grounding point is located at a position, close to the edge of the side edge of the metal rear cover, of the fourth metal unit, one end, close to the eleventh slot, of the fourth metal unit is electrically connected with a third feed source through a third feed point, the fourth metal unit, the fifth metal unit, the sixth metal unit, the third feed point and the third feed source form a part of a third antenna, the fourth metal unit is used for providing a fourth resonance in a left-hand mode, the fifth metal unit is arranged in a suspended manner, the fifth metal unit is used for providing a fifth resonance in a current loop mode, and the sixth metal unit is used for providing a sixth resonance in a slot mode;
the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes the first communication frequency.
According to a second aspect, in a first embodiment of the second aspect, the first communication frequency comprises 1710 MHz-2690 MHz.
In a second embodiment of the second aspect, the frequency of the first resonance, the second resonance and the third resonance after superposition further comprises: 1575.42 MHz.
According to the second aspect or the first embodiment of the second aspect or the second embodiment of the second aspect, in a third embodiment of the second aspect, further comprising: a second feed point and a second feed source;
wherein an end of the third metal element near the ninth slot is electrically connected to the second feed through the second feeding point, the third metal element, the second feeding point and the second feed form part of a second antenna, the second antenna is configured to provide a seventh resonance in a left-hand mode, a frequency of the seventh resonance includes a second communication frequency, and the second communication frequency is different from a frequency range of the first communication frequency.
According to the second aspect and any one of the first to third embodiments of the second aspect, in a fourth embodiment of the second aspect, further comprising: a fourth feed point and a fourth feed source;
wherein an end of the sixth metal element close to the twelfth slot is electrically connected to the fourth feed through the fourth feed point, the sixth metal element, the fourth feed point and the fourth feed form a part of a fourth antenna, the fourth antenna is configured to provide an eighth resonance in a left-hand mode, a frequency of the eighth resonance includes a third communication frequency, and the third communication frequency is different from a frequency range of the first communication frequency.
In a fifth embodiment of the second aspect, according to the second aspect and any one of the first to fourth embodiments of the second aspect, one or more of the first, second, third and fourth antennas further comprises a respective matching circuit;
if the first antenna further comprises a first matching circuit, the first metal unit is connected with one end of the first matching circuit through the first feeding point, and the other end of the first matching circuit is connected with the first feed source;
if the second antenna further comprises a second matching circuit, the third metal unit is connected with one end of the second matching circuit through the second feeding point, and the other end of the second matching circuit is connected with the second feed source;
if the third antenna further comprises a third matching circuit, the fourth metal unit is connected with one end of the third matching circuit through the third feed point, and the other end of the third matching circuit is connected with the third feed source;
if the fourth antenna further comprises a fourth matching circuit, the sixth metal unit is connected with one end of the fourth matching circuit through the fourth feeding point, and the other end of the fourth matching circuit is connected with the fourth feed source.
According to the second aspect and any one of the first to fifth embodiments of the second aspect, in a sixth embodiment of the second aspect, the first antenna and/or the third antenna further comprise a respective antenna adjusting circuit, the antenna adjusting circuit comprises at least one branch, and the antenna adjusting circuit is configured to conduct the respective branch according to an adjusting instruction of the terminal device to adjust a frequency of a resonance provided by the first antenna and/or the third antenna;
if the first antenna comprises a first antenna adjusting circuit, the first metal element is respectively connected with one end of the first antenna adjusting circuit and one end of the first matching circuit through the first feeding point, the other end of the first antenna adjusting circuit is grounded, and the first matching circuit is connected with the first feed source; or,
the first metal unit is connected with one end of the first matching circuit through the first feed point, the other end of the first matching circuit is connected with the first feed source, the first metal unit is connected with one end of the first antenna adjusting circuit through a first connecting point, and the other end of the first antenna adjusting circuit is grounded;
If the third antenna further comprises a third antenna adjusting circuit, the fourth metal unit is respectively connected with one end of the third antenna adjusting circuit and one end of the third matching circuit through the third feed point, the other end of the third antenna adjusting circuit is grounded, and the other end of the third matching circuit is connected with the third feed source; or,
the fourth metal unit is connected with one end of the third matching circuit through the third feed point, the other end of the third matching circuit is connected with the third feed source, the fourth metal unit is connected with one end of the third antenna adjusting circuit through a third connection point, and the other end of the third antenna adjusting circuit is grounded.
According to the second aspect and any one of the first to sixth embodiments of the second aspect, in a seventh embodiment of the second aspect, a thirteenth slit is further disposed on the metal rear cover, the thirteenth slit is disposed on one side of the seventh metal unit, two ends of the thirteenth slit are communicated with a side edge of the metal rear cover, a middle section of the thirteenth slit has a distance from an edge of the metal rear cover, and the thirteenth slit divides the seventh metal unit into an eighth metal unit and a ninth metal unit;
The eighth metal element is electrically connected with a fifth feed source through a fifth feed point to form part of a fifth antenna, the fifth antenna is used for providing a ninth resonance of a left-hand mode, and the frequency of the ninth resonance comprises a fourth communication frequency.
According to a seventh embodiment of the second aspect, in an eighth embodiment of the second aspect, the fifth antenna further comprises a fifth matching circuit, the eighth metal element is connected with one end of the fifth matching circuit through the fifth feeding point, and the other end of the fifth matching circuit is connected with the fifth feeding source.
According to a seventh embodiment of the second aspect or an eighth embodiment of the second aspect, in a ninth embodiment of the second aspect, the frequency of the seventh resonance comprises the second communication frequency, respectively the frequency of the ninth resonance comprises 1575.42MHz or 1176.45 MHz; alternatively, the frequency of the seventh resonance comprises 1575.42MHz or 1176.45MHz, and the frequency of the ninth resonance comprises the second communication frequency, wherein the second communication frequency is different from the frequency of the ninth resonance.
According to the second aspect and any one of the first to ninth embodiments of the second aspect, in a tenth embodiment of the second aspect, a fourteenth slit is further disposed on the metal rear cover, the fourteenth slit is disposed on one side edge of the ninth metal unit, two ends of the fourteenth slit are communicated with an edge of the metal rear cover, a middle section of the fourteenth slit has a distance from the edge of the metal rear cover, and the fourteenth slit divides the ninth metal unit into a tenth metal unit and an eleventh metal unit;
The tenth metal element is electrically connected to the sixth feed through the sixth feed point to form a part of a sixth antenna, the sixth antenna is configured to provide a tenth resonance of a left-hand mode, and a frequency of the tenth resonance includes a fifth communication frequency.
According to a tenth embodiment of the second aspect, in the eleventh embodiment of the second aspect, the sixth antenna further comprises a sixth matching circuit, the tenth metal element is connected with one end of the sixth matching circuit through the sixth feeding point, and the other end of the sixth matching circuit is connected with the sixth feeding source.
According to a tenth embodiment of the second aspect or the eleventh embodiment of the second aspect, in the twelfth embodiment of the second aspect, the fifth communication frequency comprises 2400MHz-2500 MHz.
The terminal device provided by the embodiment of the application, the antenna at the top can provide the first resonance of a left-hand mode, the second resonance of a current loop mode and the third resonance of a slot mode, wherein the frequency after the superposition of the first resonance, the second resonance and the third resonance comprises the first communication frequency, and the area of a radiator for realizing the first communication frequency is large, so that the antenna at the top of the terminal device can radiate uniformly in all directions when working at the first communication frequency, the terminal device is on the basis of ensuring the OTA performance of the antenna, the SAR of a head mode and the head-hand mode is low, and the relevant standard of the SAR can be met without backspacing power. The antenna at the bottom can provide a third resonance in a left-hand mode, a fourth resonance in a current loop mode and a fifth resonance in a slot mode, wherein the superposed frequency of the third resonance, the fourth resonance and the fifth resonance comprises a first communication frequency, and the area of a radiator for realizing the first communication frequency is large, so that the antenna at the bottom of the terminal equipment can radiate uniformly in all aspects when working at the first communication frequency, the terminal equipment can ensure that the antenna has low body SAR on the basis of the OTA performance of the first communication frequency, and the back-off power interface is not needed to meet the relevant standards of SAR.
Drawings
Fig. 1A is a schematic view of a slot position of a terminal device designed by a metal frame in the prior art;
fig. 1B is a schematic diagram of a second position of a slot of a terminal device designed on a metal frame in the prior art;
FIG. 1C is a schematic diagram of the slot position of a terminal device for a metal back cover design in the prior art;
fig. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 3A is a schematic structural diagram of a top portion of a terminal device according to an embodiment of the present application
Fig. 3B is a first schematic structural diagram of a bottom of a terminal device according to an embodiment of the present application;
fig. 3C is a schematic structural diagram of a top portion of a terminal device according to an embodiment of the present application;
fig. 3D is a schematic structural diagram of a bottom portion of a terminal device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a terminal device according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of a terminal device according to another embodiment of the present application;
fig. 6A is a first schematic structural diagram of a first antenna of a terminal device according to an embodiment of the present application;
fig. 6B is a schematic structural diagram of a first antenna of a terminal device according to an embodiment of the present application;
fig. 6C is a first schematic diagram illustrating a connection between a first antenna switch and a first adjusting matching circuit in a first antenna adjusting circuit according to an embodiment of the present application;
Fig. 6D is a schematic diagram illustrating a connection between a first antenna switch and a first adjusting matching circuit in a first antenna adjusting circuit according to an embodiment of the present application;
fig. 6E is a schematic structural diagram of a first antenna adjusting circuit according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a terminal device according to another embodiment of the present application;
fig. 8 is a schematic structural diagram of a terminal device according to another embodiment of the present application;
fig. 9A is a schematic structural diagram of a fifth antenna of a terminal device according to an embodiment of the present application;
fig. 9B is a schematic structural diagram of a fifth antenna of a terminal device according to another embodiment of the present application;
fig. 9C is a schematic structural diagram of a fifth antenna of a terminal device according to another embodiment of the present application;
fig. 9D is a schematic structural diagram of a fifth antenna of a terminal device according to another embodiment of the present application;
fig. 10 is a schematic structural diagram of a terminal device according to another embodiment of the present application;
fig. 11A is a schematic structural diagram of a sixth antenna of a terminal device according to an embodiment of the present application;
fig. 11B is a schematic structural diagram of a sixth antenna of a terminal device according to another embodiment of the present application;
fig. 11C is a schematic structural diagram of a sixth antenna of a terminal device according to another embodiment of the present application;
Fig. 11D is a schematic structural diagram of a sixth antenna of a terminal device according to another embodiment of the present application;
fig. 12A is a schematic diagram of a superimposed S11 curve of a terminal device provided with a first resonance, a second resonance, and a third resonance according to an embodiment of the present application;
fig. 12B is a graph illustrating radiation efficiency and system efficiency after superposition of the first resonance, the second resonance, and the third resonance of the terminal device according to an embodiment of the present application;
fig. 12C is a current distribution diagram of a terminal device operating at a first resonance according to an embodiment of the present application;
FIG. 12D is a diagram illustrating a current distribution when the terminal device operates at the second resonance according to an embodiment of the present application;
fig. 12E is a current distribution diagram of the terminal device operating at the third resonance according to an embodiment of the present application;
fig. 12F is a two-dimensional radiation pattern of the antenna on the top of the terminal device in the plane Theta 90 ° and Phi 0 ° according to an embodiment of the present application;
fig. 12G is a two-dimensional radiation pattern of the antenna on the top of the terminal device in a plane Theta and Phi being 0 ° and Phi being 90 °, according to an embodiment of the present application;
fig. 12H is a two-dimensional radiation pattern of the antenna on the top of the terminal device in the plane Theta 90 ° and Phi 0 ° according to an embodiment of the present application;
Fig. 12I is a two-dimensional radiation pattern of the antenna on the top of the terminal device in the plane Theta ═ 0 ° and Phi ═ 90 ° according to an embodiment of the present application;
fig. 12J is a two-dimensional radiation pattern of the antenna on the top of the terminal device in the plane Theta 90 ° and Phi 0 ° according to an embodiment of the present application;
fig. 12K is a two-dimensional radiation pattern of the antenna on the top of the terminal device in a plane Theta and Phi being 0 ° and Phi being 90 °, according to an embodiment of the present application;
fig. 12L is a two-dimensional radiation pattern of the antenna on the top of the terminal device in the plane Theta 90 ° and Phi 0 ° according to an embodiment of the present application;
fig. 12M is a two-dimensional radiation pattern of the antenna on the top of the terminal device in a plane Theta-0 ° and Phi-90 ° according to an embodiment of the present application;
fig. 12N is a graph illustrating a reflection coefficient S11 curve of a seventh resonance of a terminal device according to an embodiment of the disclosure;
fig. 12O is a schematic diagram of radiation efficiency and system efficiency curves of a seventh resonance of a terminal device according to an embodiment of the present application;
fig. 12P is a two-dimensional radiation pattern of the seventh resonance of the terminal device in the plane Theta-90 ° and Phi-0 ° according to an embodiment of the present application;
fig. 12Q is a two-dimensional radiation pattern of a seventh resonance of the terminal device in a plane Theta-0 ° and Phi-90 ° according to an embodiment of the present application;
Fig. 12R is a current distribution diagram of the terminal device operating at the seventh resonance according to an embodiment of the present application;
fig. 12S is a graph illustrating a reflection coefficient S11, a radiation efficiency and a system efficiency of a fifth antenna of a terminal device according to an embodiment of the present application;
fig. 12T is a graph illustrating a reflection coefficient S11, radiation efficiency, and system efficiency curve of a frequency obtained by superimposing the fourth resonance, the fifth resonance, and the sixth resonance of the terminal device according to the embodiment of the application;
fig. 12U is a schematic diagram of radiation efficiency of an eighth resonance and a system efficiency curve of a terminal device according to an embodiment of the present application;
fig. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 14A is a schematic structural diagram of a top portion of a terminal device according to an embodiment of the present application;
fig. 14B is a schematic structural diagram of a top portion of a terminal device according to another embodiment of the present application;
fig. 14C is a schematic structural diagram of a bottom portion of a terminal device according to an embodiment of the present application;
fig. 14D is a schematic structural diagram of a bottom portion of a terminal device according to another embodiment of the present application;
fig. 15A is a schematic structural diagram of a top portion of a terminal device according to another embodiment of the present application;
fig. 15B is a schematic structural diagram of a top portion of a terminal device according to another embodiment of the present application;
Fig. 15C is a schematic structural diagram of a bottom portion of a terminal device according to another embodiment of the present application;
fig. 15D is a schematic structural diagram of a bottom portion of a terminal device according to another embodiment of the present application;
fig. 16 is a schematic structural diagram of a terminal device according to another embodiment of the present application;
fig. 17A is a schematic structural diagram of a fifth antenna of a terminal device according to an embodiment of the present application;
fig. 17B is a schematic structural diagram of a fifth antenna of a terminal device according to another embodiment of the present application;
fig. 17C is a schematic structural diagram of a sixth antenna of a terminal device according to an embodiment of the present application;
fig. 17D is a schematic structural diagram of a sixth antenna of a terminal device according to another embodiment of the present application.
Detailed Description
The terminal equipment of lid design behind metal frame and the metal more and more obtains people's favor, for the normal communication of the terminal equipment of lid design behind assurance metal frame or the metal, at present, through slotting on the metal frame of terminal equipment or slotting in the position that the lid is close to top and bottom behind the metal, the lid is regarded as the partly of antenna radiator behind the metal frame that will be cut off or the metal that is cut off, makes the antenna carry out effectual radiation.
Fig. 1A is a schematic diagram of a slotting position of a terminal device designed by a metal frame in the prior art, and fig. 1B is a schematic diagram of a slotting position of a terminal device designed by a metal frame in the prior art. The rear cover of the terminal device with the metal frame design shown in fig. 1A and 1B is made of a non-conductor material, for example: plastic, glass or ceramic.
Wherein, fig. 1A is a schematic diagram of the back of a terminal device, referring to fig. 1A, in the prior art, two slits 11 are arranged at two ends of a top edge of a metal frame of a terminal device 10 along an X-axis direction (wherein, the X-axis is a direction from left to right along the metal frame of the terminal device), a metal frame section 12 formed by being separated by the two slits 11 is located between the two slits 11, a common grounding point 13 is arranged on the metal frame section 12, the common grounding point 13 is usually arranged at a position close to a midpoint of the metal frame section 12, the first communication frequency (e.g. 1710-2690MHz) is achieved by the first portion 1A of the metal frame segment 12, the common ground 13 and the feeding point 1 (Feed 1 in figure 1A), other communication frequencies (e.g., 2.4GHz wifi) are achieved through the second portion 1b of the metal bezel segment 12, the corresponding Feed point 2 (Feed 2 in fig. 1A) of the common ground point 13; alternatively, other communication frequencies (e.g., 2.4GHz wifi) may be achieved through the first portion 1A of the metal bezel segment 12, the common ground point 13, and the Feed point 1 (Feed 1 in FIG. 1A), and a first communication frequency (e.g., 1710MHz-2690MHz) may be achieved through the second portion 1b of the metal bezel segment 12, the corresponding Feed point 2 (Feed 2 in FIG. 1A) of the common ground point 13. Two slots 11 are arranged at two ends of the bottom edge of the metal frame of the terminal device 10 along the X-axis direction, the two slots 11 at the bottom are separated to form a metal frame section 14, and a first communication frequency (such as 1710MHz-2690MHz) and other communication frequencies (such as 824MHz-894MHz and/or 880MHz-960MHz) are realized through the metal frame section 14, the grounding point 15 and the feeding point 3 (Feed 3 in fig. 1A).
Wherein, fig. 1B is a schematic diagram of a back side of the terminal device, and referring to fig. 1B, by respectively providing two slits 11 on two sides of the metal frame of the terminal device parallel to the Y-axis (where the Y-axis is a direction along the metal frame of the terminal device from the bottom to the top), the two slits 11 being close to the vertex of the top of the terminal device, the metal frame section 12 formed by the two slits 11 being located between the two slits 11, the metal frame section 12 being provided with a common grounding point 13, the common grounding point 13 being generally provided at a position close to the midpoint of the metal frame section 12, the first communication frequency (e.g. 1710-, other communication frequencies (e.g. 2.4GHz wifi) are achieved by the second portion 1B of the metal bezel segment 12, the common ground point 13 and the Feed point 2 (Feed 2 in fig. 1B). Alternatively, other communication frequencies (e.g., 2.4GHz wifi) are achieved through the first portion 1a of the top metallic bezel segment 12, the common ground 13, and the Feed point 1 (Feed 1 in FIG. 1B), and a first communication frequency (e.g., 1710MHz-2690MHz) is achieved through the second portion 1B of the top metallic bezel segment 12, the corresponding Feed point 2 of the common ground 13 (Feed 2 in FIG. 1B). Two slots 11 are arranged on a metal frame on the bottom side of the terminal device 10 along an X-axis direction (where the X-axis is a direction from left to right along the metal frame of the terminal device), a metal frame segment 14 is formed by being partitioned by the two slots 11 on the bottom, and a first communication frequency (such as 1710MHz-2690MHz) and other communication frequencies (such as 824MHz-894MHz and/or 880MHz-960MHz) are realized by the metal frame segment 14, the ground point 15 and the feeding point 3 (Feed 3 in fig. 1A).
In the prior art shown in fig. 1B, two slits 11 at the bottom of the terminal device may also be disposed on the metal frame along the Y-axis direction, and the two slits 11 are respectively close to two vertexes at the bottom of the terminal device, and the structure is similar to that of the top shown in fig. 1B.
Fig. 1C is a schematic diagram of the slot position of the terminal device for a metal back cover design in the prior art. The frame of the terminal device designed by the metal rear cover shown in fig. 1C is made of a non-conductor material, for example: and (3) plastic materials.
Fig. 1C is a schematic diagram of a back side of a terminal device, and referring to fig. 1C, a metal back cover of the terminal device is divided into a metal unit 1, a metal unit 2, and a metal unit 3 by respectively providing slots at positions close to a top side and a bottom side of the metal back cover, where the metal unit 1 and the metal unit 2 are respectively used for implementing an antenna at the top and an antenna at the bottom of the terminal device. For the antenna on the top of the terminal device, a common ground point (GND of the top antenna in fig. 1C) is arranged on the metal unit 1, the common ground point is close to the midpoint of the metal unit 1, the first communication frequency (e.g., 1710-. For the bottom antenna, the metal element 2 is respectively connected with a feeding point (Feed3) and a grounding point (GND of the bottom antenna in fig. 1C), and the first communication frequency (such as 1710 MHz-2690 MHz) and other communication frequencies (such as 824MHz-894MHz and/or 880MHz-960MHz) of the bottom antenna are realized through the metal element 2, the feeding point (Feed3) and the grounding point.
When the antenna scheme at the top of the terminal device is implemented in the manner shown in fig. 1A to 1C, on the basis of ensuring the OTA performance of the antenna at the first communication frequency, the SAR of the antenna at the top at the head mode and the head-hand mode at the first communication frequency is higher, and in addition, in the head mode and the head-hand mode, the OTA performance of the antenna at the top of the terminal device at the first communication frequency is reduced greatly compared with the OTA performance of the antenna at the first communication frequency in a free space state.
When the antenna scheme at the bottom of the terminal device is implemented in the manner shown in fig. 1A to 1C, on the basis of ensuring the OTA performance of the first communication frequency of the antenna, the body SAR of the first communication frequency of the antenna is higher, and in addition, the OTA performance of the first communication frequency of the antenna in the hand mode and the head-hand mode is reduced by a larger amount compared with the OTA performance of the first communication frequency of the antenna in the free space state.
Therefore, the application provides a terminal device, the terminal device increases the area of the radiator for realizing the first communication frequency, so that the radiation intensity of the antenna is more uniform when the antenna works at the first communication frequency, no obvious zero point exists, the relevant standard of the SAR can be met without returning input power on the basis of ensuring the OTA performance of the first communication frequency of the antenna, and the OTA performance reduction of the first communication frequency of the antenna in a hand mode, a head mode and a head-hand mode can be reduced.
In addition, the terminal devices referred to in the present application may include, but are not limited to: terminal devices such as smart phones, tablet computers, and wireless Access Points (APs).
Example one
Fig. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present application; fig. 3A is a schematic structural diagram of a top portion of a terminal device according to an embodiment of the present application; fig. 3B is a schematic structural diagram of a bottom of a terminal device according to an embodiment of the present application; fig. 3C is a schematic structural diagram of a top portion of a terminal device according to an embodiment of the present application; fig. 3D is a schematic structural diagram of a bottom portion of a terminal device according to an embodiment of the present application; fig. 4 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
In this embodiment, fig. 2 to 4 are schematic diagrams of the back of the terminal device, an origin point in the coordinate system shown in fig. 2 to 4 is a geometric center point of the terminal device, a Z-axis direction is a direction from the front of the terminal device to the back of the terminal device, a Y-axis direction is a direction from the bottom edge of the terminal device to the top edge of the terminal device, an X-axis is a direction from right to left along a metal frame of the terminal device, and the X-axis is perpendicular to the Y-axis and the Z-axis respectively.
Referring to fig. 2, the terminal device 20 includes a metal frame, and four gaps are disposed on the metal frame: a first gap a1, a second gap a2, a third gap A3, and a fourth gap a 4.
Illustratively, the widths of the first, second, third, and fourth slits a1, a2, A3, and a4 may be 0.8mm to 1.0mm, and the first, second, third, and fourth slits a1, a2, A3, and a4 may be filled with a non-conductive medium, for example, Polycarbonate (PC). In practical applications, the widths of the first gap a1, the second gap a2, the third gap A3 and the fourth gap a4 may be set according to practical situations, and the embodiment of the present application does not limit this.
The first gap A1 and the second gap A2 are arranged at the top edge of the metal frame, and the first gap A1 and the second gap A2 are arranged at intervals along the X-axis direction; the third slit A3 and the fourth slit a4 are disposed at the bottom edge of the metal frame, and the third slit A3 and the fourth slit a4 are disposed at intervals in the X-axis direction.
The metal bezel is divided into a plurality of portions by a first slit a1, a second slit a2, a third slit A3, and a fourth slit a4, the plurality of portions including: a first metal frame segment T1, a second metal frame segment T2, a third metal frame segment T3, and a fourth metal frame segment T4. The first metal frame section T1 is located between the first gap a1 and the fourth gap a4, the second metal frame section T2 is located between the first gap a1 and the second gap a2, the third metal frame section T3 is located between the second gap a2 and the third gap A3, and the fourth metal frame section T4 is located between the third gap A3 and the fourth gap a 4.
At least two grounding points are arranged on the first metal frame section T1, and the at least two grounding points include a first grounding point GND1 and a fourth grounding point GND4, wherein the distance between the first grounding point GND1 and the first gap a1 is smaller than the distance between other grounding points on the first metal frame section T1 (other grounding points except the first grounding point GND1 and the fourth grounding point GND4 are not shown in fig. 2) and the first gap a1, and the distance between the fourth grounding point GND4 and the fourth gap a4 is smaller than the distance between other grounding points on the first metal frame section T1 (other grounding points except the first grounding point GND1 and the fourth grounding point GND4 are not shown in fig. 2) and the fourth gap a 4. That is, the first grounding point GND1 is the closest grounding point to the first slit a1 among the grounding points disposed on the first metal bezel section T1, and the fourth grounding point GND4 is the closest grounding point to the fourth slit a4 among the grounding points disposed on the first metal bezel section T1.
In the embodiment of the present application, the first metal bezel segment T1 is divided into a plurality of portions by providing at least two grounding points on the first metal bezel segment T1, and the plurality of portions at least include: a part of the first radiating branch F1 and a part of the fourth radiating branch F4, wherein the first radiating branch F1 includes a metal frame section from the first grounding point GND1 to the first gap a1, and the fourth radiating branch F4 includes a metal frame section from the fourth grounding point GND4 to the fourth gap a 4.
At least two grounding points are arranged on the third metal frame section T3: a second ground point GND2 and a third ground point GND3, wherein a distance between the second ground point GND2 and the second slot a2 is smaller than a distance between other ground points on the third metal bezel section T3 (other ground points than the second ground point GND2 and the third ground point GND3 are not shown in fig. 2) and the second slot a2, and a distance between the third ground point GND3 and the third slot A3 is smaller than a distance between other ground points on the third metal bezel section T3 (other ground points than the second ground point GND2 and the third ground point GND3 are not shown in fig. 2) and the third slot A3. That is, the second grounding point GND2 is the closest grounding point to the second slit a2 among the plurality of grounding points provided on the third metal bezel section T3, and the third grounding point GND3 is the closest grounding point to the third slit A3 among the plurality of grounding points provided on the third metal bezel section T3.
In the embodiment of the present application, at least two grounding points are disposed on the third metal bezel section T3, so as to divide the third metal bezel section T3 into a plurality of portions, where the plurality of portions at least include: a second radiating branch F2 and a third radiating branch F3, wherein the second radiating branch F2 includes a metal frame section from the second grounding point GND2 to the second slot a2, and the third radiating branch F3 includes a metal frame section from the third grounding point GND3 to the third slot A3.
The first radiation branch F1, the second metal frame section T2, and the second radiation branch F2 are used to implement a first antenna ANT1, the first radiation branch F1 is further used to implement a second antenna ANT2, the third radiation branch F3, the fourth metal frame section T4, and the fourth radiation branch F4 are used to implement a third antenna ANT3, and the third radiation branch F3 is used to implement a fourth antenna ANT 4.
The structure of the top and the bottom of the terminal device 20 in the embodiment shown in fig. 2 will be described in detail below:
the structure of the top part is as follows:
as shown in fig. 2 and fig. 3A, one end of the first radiating branch F1 near the first slot a1 is connected to the first feeding point 101, the first radiating branch F1 receives an electrical signal input by the first feed 102 through the first feeding point 101, the other end of the first radiating branch F1 is connected to the first ground point GND1 to form a part of the first antenna ANT1, and the first antenna ANT1 is configured to provide a first resonance in a left-hand mode.
For example, the first feeding point 101 is a connector connecting the first radiation branch F1 and the first feed 102, and the first feeding point 101 may include a conductor strip extending toward the printed circuit board on the first radiation branch F1, and an elastic component on the printed circuit board, where the conductor strip can be crimped on the elastic component, and the elastic component is connected to the first feed 102 through a microstrip line. By way of example, the elastic component can be made of stainless steel or beryllium copper, nickel plating can be performed on the surface of the elastic component first, and then gold plating can be performed on the surface of the elastic component, so that the elastic component is guaranteed to have good conductivity, and the gold plating on the surface of the elastic component can prevent oxidation and prolong the service life of the elastic component.
For example, first feed 102 may be a radio frequency module of a terminal device, which is capable of providing an electrical signal to first antenna ANT 1.
Specifically, when the first feed source 102 inputs an electrical signal to the first radiation branch F1, the first radiation branch F1 can excite a radio frequency electromagnetic field, and radiate an electromagnetic wave to the space, so as to form a first resonance in a left-hand mode. Wherein the length of the first radiation branch F1 may be one quarter of the wavelength of the first resonance.
Referring to fig. 3A, although there is a gap between the first radiating branch F1 and the top side of the printed circuit board, in practical applications, the length of the gap can be adjusted by adjusting the position of the first grounding point GND1, so that the resonance formed by the gap is far from the target communication frequency range. For example, the position of the first ground point GND1 can be moved along the metal frame toward the top edge of the terminal device, and the length of the gap between the first radiating branch F1 and the top edge of the printed circuit board decreases, so that the frequency of the resonance formed by the gap increases; alternatively, the position of the first ground point GND1 may be moved along the metal frame toward the bottom side of the terminal device 20, and the length of the gap between the first radiating branch F1 and the top side of the printed circuit board may be increased, and the frequency of the resonance formed by the gap may be decreased, and when the first resonance is provided only by the first radiating branch F1, the frequency of the resonance formed by the gap may be different from the frequency of the first resonance, regardless of whether the position of the first ground point GND1 is moved along the metal frame toward the top side of the terminal device or toward the bottom side of the terminal device. For example, the frequency of the first resonance comprises 1710MHz-1880MHz, and the frequency of the resonance formed by the gap between the first radiating branch F1 and the top edge of the printed circuit board may be less than 1710MHz, or greater than 1880 MHz.
The second metal frame section T2 is located between the first slot a1 and the second slot a2, the first slot a1 and the second slot a2 are filled with a non-conductor medium, so that the second metal frame section T2 is suspended outside the printed circuit board, thereby forming a part of the first antenna ANT1, and the second metal frame section T2 is suspended, so that the second metal frame section T2 is used for providing a second resonance in a current loop mode.
Specifically, when the first feed 102 inputs an electrical signal to the first radiation stub F1, the second metal bezel segment T2 forms a second resonance of the current loop mode through coupling, where the length of the second metal bezel segment T2 may be one-second of the wavelength of the second resonance, and in practical applications, the length of the second metal bezel segment T2 may be adjusted by adjusting the positions of the first gap a1 and the second gap a2, and the frequency range of the second resonance may be adjusted by adjusting the length of the second metal bezel segment T2.
When the first feed source 102 inputs an electrical signal to the first radiation branch F1, the second radiation branch F2 is further used to form a part of the first antenna ANT1, and the second radiation branch F2 forms a third resonance of a slot mode by coupling. In particular, the first radiating slot between the second radiating branch F2 and the top edge of the printed circuit board is capable of exciting a radio frequency electromagnetic field, radiating electromagnetic waves into space. Wherein the length of the first radiation slot is one half of the wavelength of the third resonance. In practical applications, the adjustment of the frequency of the third resonance may be achieved by adjusting the position of the first ground point GND1 to adjust the length of the first radiating slot.
In this embodiment, the superimposed frequency of the first resonance, the second resonance, and the third resonance includes a first communication frequency, for example, the first communication frequency includes 1710-; if the first antenna is set as the main set antenna of the terminal device, the first communication frequency may be used to implement the medium-high frequency of the main set antenna of the terminal device.
For the antenna at the top of the terminal device, the area of the radiator for implementing the first communication frequency in the solutions adopted in fig. 1A and 1B includes a part of the isolated metal frame segment, and in the embodiment of the present application, the area of the radiator for implementing the first communication frequency includes the metal frame at the entire top side of the terminal device, and since the area of the radiator for implementing the first communication frequency is large, the spatial radiation intensity of the antenna at the first communication frequency is relatively uniform and there is no apparent zero point, by adopting the implementation manner shown in the present embodiment, on the basis of ensuring the OTA performance of the antenna at the top at the first communication frequency, the SAR of the antenna at the first communication frequency is low in the head mode or the head-hand mode, and the antenna at the top of the terminal device can meet the SAR-related standard without returning input power.
Alternatively, if one or more of the first resonance, the second resonance, and the third resonance are wide in bandwidth, when the first communication frequency includes not only 1710MHz to 2690MHz but also 1575.42MHz, that is, the first communication frequency can also cover the GPS L1 band, the first antenna ANT1 may also be set as a GPS antenna.
As shown in fig. 3C and fig. 4, optionally, the first antenna ANT1 further includes: a first matching circuit 103. Specifically, the first radiation branch F1 is connected to one end of the first matching circuit 103 through the first feeding point 101, and the other end of the first matching circuit 103 is connected to the first feed 102.
Illustratively, the first matching circuit 103 may include a capacitance to ground or a series inductance or a series capacitance or a parallel inductance, or a capacitance to ground and a series inductance, or a capacitance to series and a parallel inductance. When the first matching circuit 103 comprises a grounded capacitor, the first radiation branch F1 is respectively connected with one end of the capacitor and the first feed 102 through the first feed point 101, and the other end of the capacitor is grounded; when the first matching circuit 103 includes an inductor connected in series, the first radiating branch F1 is connected to one end of the inductor connected in series through the first feeding point 101, and the other end of the inductor connected in series is connected to the first feed 102; when the first matching circuit 103 includes a capacitor connected in series, the first radiating branch F1 is connected to one end of the capacitor connected in series through the first feeding point 101, and the other end of the capacitor is connected to the first feed 102; when the first matching circuit 103 comprises inductors connected in parallel, one end of the inductor and the first feed source 102 are respectively connected to the first radiating branch F1 through the first feeding point 101, and the other end of the inductor is grounded; when the first matching circuit 103 comprises a grounded capacitor and a series inductor, the first radiating branch F1 is connected to one end of the series inductor through the first feeding point 101, the other end of the series inductor is connected to one end of the capacitor and the first feed 102, respectively, and the other end of the capacitor is grounded; or, the first radiation branch F1 is connected to one end of a capacitor and one end of a series inductor through a first feeding point 101, respectively, the other end of the capacitor is grounded, and the other end of the series inductor is connected to the first feed source 102; when the first matching circuit 103 includes a capacitor and an inductor connected in parallel in series, the first radiation branch F1 is connected to one end of the capacitor through the first feeding point 101, the other end of the capacitor is connected to the first feed 102 through the one end of the inductor, and the other end of the inductor is grounded, or the first radiation branch F1 is connected to one end of the inductor and one end of the capacitor through the first feeding point 101, the other end of the inductor is grounded, and the other end of the capacitor is connected to the first feed 101. In practical applications, the first matching circuit 103 may include one or more of a capacitor connected to ground, a series inductor, a series capacitor, or a parallel inductor, and if there are a plurality of capacitors, the connection order thereof may be set according to practical requirements, and is not limited to the above-described manner.
The first matching circuit 103 can adjust the impedance of the first resonance, so that the return loss value of the first resonance is smaller, and the OTA performance is higher when the first antenna ANT1 operates at the first resonance.
Optionally, one end of the second radiation branch F2 close to the second slot a2 is connected to the second feeding point 201, the second radiation branch F2 passes through the second feeding point 201 and an electrical signal input by the second feed 202, and the other end of the second radiation branch F2 is connected to the second ground point GND2 to form a part of the second antenna ANT2, and the second antenna ANT2 is configured to provide a seventh resonance in a left-hand mode.
The specific structure of the second feeding point 201 may refer to the detailed description of the first feeding point 101, and the specific structure of the second feeding point 202 may refer to the detailed description of the first feeding point 102, which are not described herein again.
Specifically, when the second feed 202 inputs an electrical signal to the second radiation branch F2, the second radiation branch F2 can excite a radio frequency electromagnetic field and radiate an electromagnetic wave to the space, thereby forming a seventh resonance in a left-hand mode. Wherein the length of the second radiation branch F2 may be a quarter of the wavelength of the seventh resonance.
The frequency of the seventh resonance includes: a second communication frequency. Wherein the second communication frequency is different from the first communication frequency in frequency range. Illustratively, when the first communication frequency includes 1710-.
As shown in fig. 3C and fig. 4, optionally, the second antenna ANT2 further includes: a second matching circuit 203. Specifically, the second radiation branch F2 is connected to one end of the second matching circuit 203 through the second feeding point 201, and the other end of the second matching circuit 203 is connected to the second feed 202.
Illustratively, the second matching circuit 203 includes a capacitance to ground or a series inductance or a series capacitance or a parallel inductance, or a capacitance to ground and a series inductance, or a capacitance to series and a parallel inductance. When the second matching circuit 203 comprises a grounded capacitor, the second radiation branch F2 is respectively connected to one end of the capacitor and the second feed 202 through the second feed point 201, and the other end of the capacitor is grounded; when the second matching circuit 203 comprises an inductor connected in series, the second radiating branch F2 is connected to one end of the inductor connected in series through the second feeding point 201, and the other end of the inductor connected in series is connected to the second feed 202; when the second matching circuit 203 comprises capacitors connected in series, the second radiating branch F2 is connected to one end of the capacitors connected in series through the second feeding point 201, and the other end of the capacitor is connected to the second feed 202; when the second matching circuit 203 comprises inductors connected in parallel, one end of the inductor and the second feed source 202 are respectively connected to the second radiating branch F2 through the second feed point 201, and the other end of the inductor is grounded; when the second matching circuit 203 comprises a grounded capacitor and a series inductor, the second radiation branch F2 is connected to one end of the series inductor through the second feeding point 201, the other end of the series inductor is connected to one end of the capacitor and the second feed 202, respectively, and the other end of the capacitor is grounded, or the second radiation branch F2 is connected to one end of the capacitor and one end of the series inductor through the second feeding point 201, and the other end of the series inductor is connected to the second feed 202; when the second matching circuit 203 includes a capacitor and an inductor connected in series and in parallel, the second radiation branch F2 is connected to one end of the capacitor through the second feeding point 201, the other end of the capacitor is connected to one end of the inductor and the second feeding source 202 respectively, and the other end of the inductor is grounded, or the second radiation branch F2 is connected to one end of the inductor and one end of the capacitor through the second feeding point 201, the other end of the inductor is grounded, and the other end of the capacitor is connected to the second feeding source 202. In practical applications, the second matching circuit 203 may include one or more of a capacitor connected to ground, a series inductor, a series capacitor, or a parallel inductor, and if there are more than one, the connection sequence may be set according to practical requirements, and is not limited to the above-described manner.
The second matching circuit 203 can adjust the impedance of the seventh resonance, so that the return loss value of the seventh resonance is smaller, and the OTA performance is higher when the second antenna ANT2 operates at the seventh resonance.
The structure of the bottom:
referring to fig. 3B, one end of the third radiation branch F3 near the third slot A3 is connected to the third feeding point 301, the third radiation branch F3 receives an electrical signal input by the third feed 302 through the third feeding point 301, the other end of the third radiation branch F3 is connected to the third ground point GND3 to form a part of the third antenna ANT3, and the third antenna ANT3 is used to provide a fourth resonance in a left-hand mode.
The specific structure of the third feeding point 301 may refer to the detailed description of the first feeding point 101, and the specific structure of the third feed 302 may refer to the detailed description of the first feed 102, which are not described herein again.
Specifically, when the third feed 302 inputs an electrical signal to the third radiation branch F3, the third radiation branch F3 can excite a radio frequency electromagnetic field and radiate an electromagnetic wave to the space, so as to form a fourth resonance of a left-hand mode, wherein the length of the third radiation branch F3 is about a quarter of the wavelength of the fourth resonance.
Referring to fig. 3B, although there is a gap between the third radiating branch F3 and the bottom edge of the pcb, in practical applications, the length of the gap can be adjusted by adjusting the position of the third grounding point GND3, so that the frequency of the resonance formed by the gap is different from the frequency of the fourth resonance. For example, the position of the third ground point GND3 can be moved along the metal frame toward the top edge of the terminal device, and the length of the gap between the third radiating branch F3 and the top edge of the printed circuit board increases, so that the frequency of the resonance formed by the gap decreases; alternatively, when the position of the third ground point GND3 is moved along the metal frame toward the bottom side of the terminal device 20, the length of the gap between the third radiating branch F3 and the top side of the printed circuit board is decreased, and the frequency of the resonance formed by the gap is increased, and when the position of the third ground point GND3 is moved toward the top side of the terminal device 20 or toward the bottom side of the terminal device 20, the frequency of the resonance formed by the gap may be different from the frequency of the fourth resonance when only the third radiating branch F3 is needed to provide the fourth resonance. For example, the frequency of the fourth resonance comprises 1710MHz-1880MHz, and the frequency of the resonance formed by the gap between the third radiating stub F3 and the bottom edge of the printed circuit board may be less than 1710MHz, or greater than 1880 MHz.
The fourth metal bezel section T4 is located between the third slot A3 and the fourth slot a4, the third slot A3 and the fourth slot a4 are filled with a non-conductor medium, and the fourth metal bezel section T4 is suspended outside the printed circuit board to form a part of the third antenna ANT3, and since the fourth metal bezel section T4 is suspended, the fourth metal bezel section T4 is used to provide a fifth resonance in a current loop mode.
Specifically, when the third feed source 302 inputs an electrical signal to the third radiation branch F3, the fourth metal bezel segment T4 forms a fifth resonance in a current loop mode through coupling, where the length of the fourth metal bezel segment T4 may be one half of the wavelength of the fifth resonance, and in practical applications, the length of the fourth metal bezel segment T4 may be adjusted by adjusting the positions of the third slit A3 and the fourth slit a4, and the frequency of the fifth resonance may be adjusted by adjusting the length of the fourth metal bezel segment T4.
When the third feed 302 inputs an electrical signal to the third radiation branch F3, the fourth radiation branch F4 is further configured to form a part of the third antenna ANT3, and the fourth radiation branch forms a sixth resonance in a slot mode through coupling. Specifically, the second radiation gap between the fourth radiation branch F4 and the bottom edge of the printed circuit board can excite the radio frequency electromagnetic field to radiate electromagnetic waves to the space. Wherein the length of the second radiation slot is one half of the wavelength of the sixth resonance. In practical applications, the adjustment of the frequency of the sixth resonance may be achieved by adjusting the position of the fourth grounding point GND4 to adjust the length of the fourth radiating slot. In this embodiment, the superimposed frequencies of the fourth resonance, the fifth resonance, and the sixth resonance include a first communication frequency, for example, the first communication frequency includes 1710-2690MHz, if the first antenna ANT1 is set as a diversity antenna, the third antenna ANT3 may be set as a main antenna, the third antenna ANT3 may be used to implement a medium-high frequency of the main antenna of the terminal device, if the first antenna ANT1 is set as a main antenna, the third antenna ANT3 may be set as a diversity antenna, and the third antenna ANT3 may be used to implement a medium-high frequency of the diversity antenna of the terminal device.
For the antenna at the bottom of the terminal device, the radiator area for implementing the first communication frequency in the prior art shown in fig. 1A and 1B includes a part of the metal bezel segment that is separated, and in this embodiment of the present application, the radiator area for implementing the first communication frequency includes the metal bezel segment on the entire bottom side of the terminal device, because the radiator area for implementing the first communication frequency is larger, the radiation intensity of the antenna at the bottom at the first communication frequency is relatively uniform, and there is no apparent zero point, therefore, by adopting the implementation manner shown in this embodiment, on the basis of ensuring the OTA performance of the antenna at the bottom at the first communication frequency, the body SAR is lower, and the SAR-related standard can be satisfied without returning the input power.
As shown in fig. 4 and fig. 3D, optionally, the third antenna ANT3 further includes: a third matching circuit 303. Specifically, the third radiation branch F3 is connected to one end of the third matching circuit 303 through the third feeding point 301, and the other end of the third matching circuit 303 is connected to the third feed 302.
For example, the third matching circuit 303 may include a capacitance to ground or a series inductance or a series capacitance or a parallel inductance, or a capacitance to ground and a series inductance, or a capacitance to series and a parallel inductance. When the third matching circuit 303 includes a grounded capacitor, the third radiation branch F3 is respectively connected to one end of the capacitor and the third feed source 302 through the third feed point 301, and the other end of the capacitor is grounded; when the third matching circuit 303 includes an inductor connected in series, the third radiating branch F3 is connected to one end of the inductor connected in series through the third feed point 301, and the other end of the inductor connected in series is connected to the third feed 302; when the third matching circuit 303 includes capacitors connected in series, the third radiating branch F3 is connected to one end of the capacitors connected in series through the third feeding point 301, and the other end of the capacitor is connected to the third feed 302; when the first matching circuit 103 comprises inductors connected in parallel, one end of the inductor and the third feed source 302 are respectively connected to the third radiating branch F3 through the third feed point 301, and the other end of the inductor is grounded; when the third matching circuit 303 includes a grounded capacitor and a serially connected inductor, the third radiation branch F3 is connected to one end of the serially connected inductor through the third feeding point 301, the other end of the serially connected inductor is connected to one end of the capacitor and the third feeding source 302, respectively, and the other end of the capacitor is grounded, or the third radiation branch F3 is connected to one end of the capacitor and one end of the serially connected inductor through the third feeding point 301, the other end of the capacitor is grounded, and the other end of the serially connected inductor is connected to the third feeding source 302; when the third matching circuit 303 includes a capacitor and an inductor connected in series and in parallel, the third radiation branch F3 is connected to one end of the capacitor through the third feeding point 101, the other end of the capacitor is connected to one end of the inductor and the third feeding source 302 respectively, and the other end of the inductor is grounded, or the third radiation branch F3 is connected to one end of the inductor and one end of the capacitor through the third feeding point 301 respectively, the other end of the inductor is grounded, and the other end of the capacitor is connected to the third feeding source 302. In practical applications, the third matching circuit 303 may include one or more of a capacitor connected to ground, a series inductor, a series capacitor, or a parallel inductor, and if there are more than one, the connection sequence may be set according to practical requirements, and is not limited to the above-described manner.
The third matching circuit 303 can adjust the impedance of the fourth resonance, so that the return loss value of the fourth resonance is smaller, and the OTA performance of the third antenna ANT3 at the fourth resonance is higher.
Alternatively, one end of the fourth radiation branch F4 near the fourth slot a4 is connected to the fourth feeding point 401, the fourth radiation branch F4 receives an electrical signal input by the fourth feed 402 through the fourth feeding point 401, and the other end of the fourth radiation branch F4 is connected to the fourth ground point GND4 to form a part of the fourth antenna ANT4, and the fourth antenna ANT4 is configured to provide an eighth resonance in the left-hand mode.
The detailed description of the first feeding point 101 can be referred to for the specific structure of the fourth feeding point 401, and the detailed description of the first feeding point 102 can be referred to for the specific structure of the fourth feeding point 402, which are not described herein again.
Specifically, when the fourth feed 402 inputs an electrical signal to the fourth radiation section F4, the fourth radiation section F4 can excite the radio frequency electromagnetic field, and radiate an electromagnetic wave to the space, thereby forming an eighth resonance in a left-hand mode. Wherein, the length of the fourth radiation branch F4 may be a quarter of the eighth resonant wavelength.
The frequency of the eighth resonance includes: a third communication frequency. Wherein the frequency range of the third communication frequency and the first communication frequency is different. Illustratively, when the first communication frequency includes 1710-.
As shown in fig. 4 and fig. 3D, optionally, the fourth antenna ANT4 further includes: a fourth matching circuit 403. Specifically, the fourth radiation branch F4 is connected to one end of the fourth matching circuit 403 through the fourth feeding point 401, and the other end of the fourth matching circuit 403 is connected to the fourth feed 402.
For example, the fourth matching circuit 403 may include a capacitance to ground or a series inductance or a series capacitance or a parallel inductance, or a capacitance to ground and a series inductance, or a capacitance to series and a parallel inductance. When the fourth matching circuit 403 includes a capacitor connected to ground, the fourth radiation branch F4 is connected to one end of the capacitor and the fourth feed 402 through the fourth feeding point 401, respectively, and the other end of the capacitor is connected to ground; when the fourth matching circuit 403 includes an inductor connected in series, the fourth radiation branch F4 is connected to one end of the inductor connected in series through the fourth feeding point 401, and the other end of the inductor connected in series is connected to the fourth feed 402; when the fourth matching circuit 403 includes capacitors connected in series, the fourth radiation branch F4 is connected to one end of the capacitors connected in series through the fourth feeding point 401, and the other end of the capacitor is connected to the fourth feed 402; when the fourth matching circuit 403 includes inductors connected in parallel, one end of the inductor and the fourth feed source 402 are respectively connected to the fourth radiation branch F4 through the fourth feed point 401, and the other end of the inductor is grounded; when the fourth matching circuit 403 includes a grounded capacitor and a serially connected inductor, the fourth radiation branch F4 is connected to one end of the serially connected inductor through the fourth feeding point 401, the other end of the serially connected inductor is connected to one end of the capacitor and the fourth feeding point 402, respectively, and the other end of the capacitor is grounded, or the fourth radiation branch F4 is connected to one end of the capacitor and one end of the serially connected inductor through the fourth feeding point 401, respectively, and the other end of the serially connected inductor is connected to the fourth feeding point 402; when the fourth matching circuit 403 includes a capacitor and an inductor connected in parallel in series, the fourth radiating branch F4 is connected to one end of the capacitor through the fourth feeding point 401, the other end of the capacitor is connected to one end of the inductor and the fourth feed 402, respectively, and the other end of the inductor is grounded, or the fourth radiating branch F4 is connected to one end of the inductor and one end of the capacitor through the fourth feeding point 401, the other end of the inductor is grounded, and the other end of the capacitor is connected to the fourth feed 402. In practical applications, the fourth matching circuit 403 may include one or more of a capacitor connected to ground, or an inductor connected in series, or a capacitor connected in series, or an inductor connected in parallel, and if there are multiple capacitors, the connection order may be set according to practical requirements, and is not limited to the above-described manner.
The fourth matching circuit 403 can adjust the impedance of the eighth resonance, so that the return loss value of the eighth resonance is smaller, and the OTA performance is higher when the fourth antenna ANT4 operates at the eighth resonance.
The terminal device generally has cellular function and GPS function, and accordingly, the terminal device includes a main antenna, a diversity antenna and a GPS antenna. If the top of the terminal device 20 is configured as shown in fig. 3A or 3C, or the bottom of the terminal device is configured as shown in fig. 3B or 3D, the antennas can be arranged in any one of the following possible ways:
a first possible implementation: setting the first antenna ANT1 as a diversity antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 being used to implement the first communication frequency of the diversity antenna, the second antenna ANT1 being set as a diversity antenna, the seventh resonance provided by the second antenna ANT2 being used to implement the second communication frequency of the diversity antenna; the third antenna ANT3 is set as a main set antenna, and specifically, the fourth resonance, the fifth resonance, and the sixth resonance provided by the third antenna ANT3 are used to implement the first communication frequency of the main set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to implement the third communication frequency of the main set antenna. The second communication frequency and the third communication frequency may be the same or different.
In addition, if the superimposed frequency of the first resonance, the second resonance, and the third resonance includes 1575.42MHz, the first antenna ANT1 may be further set as a GPS antenna; if the communication frequency of the diversity antenna does not include the second communication frequency or the superimposed frequency of the first resonance, the second resonance, and the third resonance does not include 1575.42MHz, the second antenna ANT2 may be set as a GPS antenna, and the frequency of the seventh resonance includes 1575.42MHz or 1176.45 MHz.
A second possible implementation: the third antenna ANT3 is set as a diversity antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna ANT3 are used for realizing the first communication frequency of the diversity antenna, the fourth antenna ANT4 is set as a diversity antenna, and the eighth resonance provided by the fourth antenna ANT4 is used for realizing the third communication frequency of the diversity antenna; the first antenna ANT1 is set as a master set antenna, the first resonance, the second resonance, and the third resonance provided by the first antenna ANT1 are used to implement the first communication frequency of the master set antenna, the second antenna ANT2 is set as a master set antenna, and the seventh resonance provided by the second antenna ANT2 is used to implement the second communication frequency of the master set antenna.
In addition, if the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes 1575.42MHz, the third antenna ANT3 may be further set as a GPS antenna; if the communication frequency of the diversity antenna does not include the third communication frequency or the superimposed frequency of the fourth resonance, the fifth resonance and the sixth resonance does not include 1575.42MHz, the fourth antenna ANT4 may be set as a GPS antenna, and the frequency of the seventh resonance includes 1575.42MHz or 1176.45 MHz.
By setting each antenna of the terminal device in the manner shown in this embodiment, the OTA performance of the top antenna of the terminal device at the first communication frequency is ensured, and the SAR of the top antenna is low in the hand mode and the head-hand mode at the first communication frequency, and the SAR-related standard can be satisfied without backspacing the input power. Furthermore, while the OTA performance of the antenna at the bottom of the terminal device at the first communication frequency is ensured, the body SAR is lower, and the SAR-related standard can be met without backspacing the input power.
Example two
Fig. 5 is a schematic structural diagram of a terminal device according to another embodiment of the present application; fig. 6A is a first schematic structural diagram of a first antenna of a terminal device according to an embodiment of the present application; fig. 6B is a schematic structural diagram of a first antenna of a terminal device according to an embodiment of the present application; fig. 6C is a first schematic diagram illustrating a connection between a first switch and a first adjusting matching circuit in a first antenna adjusting circuit according to an embodiment of the present application; fig. 6D is a schematic diagram illustrating a connection between a first switch and a first adjusting matching circuit in a first antenna adjusting circuit according to an embodiment of the present application; fig. 6E is a schematic diagram of a first antenna adjustment circuit according to an embodiment of the present application; fig. 7 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
In this embodiment, fig. 5 to 7 are schematic diagrams of the back of the terminal device, in the coordinate system shown in fig. 5 to 7, an origin is a geometric center point of the terminal device, a Z-axis direction is a direction from the front of the terminal device to the back of the terminal device, a Y-axis direction is a direction from the bottom edge of the terminal device to the top edge of the terminal device, an X-axis is a direction from the right side to the left side along a metal frame of the terminal device, and the X-axis is perpendicular to the Y-axis and the Z-axis, respectively.
Due to the continuous development of wireless communication technology, more and more wireless communication systems need to be supported by terminal equipment, the hardware requirement on the terminal equipment is continuously improved, and especially the requirement on the antenna of the terminal equipment is continuously improved. For example, the low frequencies that the terminal device needs to support may include one or more of LTE B12(699MHz-746MHz), LTE B13(746MHz-787MHz), LTE B14 (758MHz-798MHz), LTE B19(830MHz-890MHz), LTE B20(791MHz-862MHz), GSM850(824MHz-894MHz), GSM900(880MHz-960MHz), WCDMA850(824MHz-894 MHz), WCDMA900(880MHz-960MHz), and so on. If the manner in the foregoing embodiment may not satisfy the communication frequency band of the main set antenna and/or the diversity antenna of the terminal device at a low frequency, or the superimposed frequency of the first resonance, the second resonance, and the third resonance may not completely cover the first communication frequency (e.g., 1710MHz-2690MHz), or the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance may not completely cover the first communication frequency (e.g., 1710MHz-2690 MHz).
Therefore, in addition to the above embodiments, as shown in fig. 5 and fig. 6A, the first antenna ANT1 may further include: the first antenna adjusting circuit S1, the first antenna adjusting circuit S1 is used to adjust the frequency of the first resonance. The first antenna adjusting circuit S1 may include at least one branch, and each branch is provided with a first antenna switch K1 and a first adjusting matching circuit L1 which are electrically connected. In the present embodiment, taking as an example the case where the first antenna ANT1 includes the first matching circuit 103, the case where the first antenna ANT1 does not include the first matching circuit 103 is similar to the case where the first antenna ANT1 includes the first matching circuit 103, with the difference that: when the first antenna ANT1 does not include the first matching circuit 103, the first feeding point 101 is directly connected to the first feed 102, and when the first antenna ANT1 includes the first matching circuit 103, the first feeding point 101 is connected to one end of the first matching circuit 103, and the other end of the first matching circuit 103 is connected to the first feed 102.
The specific structures of the first antenna switch K1 and the first adjustment matching circuit L1 are not limited in this application. For example, the first antenna switch K1 may be a single-pole single-throw switch, or the first antenna adjusting circuit S1 may also include a switch that is a single-pole multiple-throw switch with one input and multiple outputs or a multiple-pole multiple-throw switch with multiple inputs and multiple outputs, which is not limited in this application. Any one switch may be connected by one or more switches connected in series and/or in parallel, which is not limited in this application. The first adjusting matching circuit L1 may be a capacitor, or an inductor, or multiple capacitors connected in series, or multiple inductors connected in series, or multiple capacitors connected in parallel, or multiple inductors connected in parallel, or at least one capacitor and at least one inductor connected in series, or at least one group of capacitors and inductors connected in series and connected in parallel, which is not limited in this application.
In this embodiment, referring to fig. 6A, in one possible connection manner, the first radiation branch F1 is connected to one end of the first antenna adjusting circuit S1 through the first feeding point 101, the other end of the first antenna adjusting circuit S1 is grounded, the first radiation branch F1 is further connected to one end of the first matching circuit 103 through the first feeding point 101, and the other end of the first matching circuit 103 is connected to the first feed 102.
Referring to fig. 6C, in another possible connection mode, the first radiation branch F1 is connected to one end of the first matching circuit 103 through the first feeding point 101, the other end of the first matching circuit 103 is connected to the first feed 102, and the first radiation branch F1 is connected to the first antenna adjusting circuit S1 through a first connection point (not shown). The structure of the first connection point may be similar to that of the first feeding point 101, and the detailed description of the first feeding point 101 may be referred to herein, which is not repeated herein.
Since the connection sequence of the first antenna switch K1 and the first adjusting matching circuit L1 includes a plurality of connection manners, the specific connection relationship of the first antenna adjusting circuit S1 will be described in detail below by using a plurality of possible connection manners.
In the above several possible connection manners, the connection relationship between the first antenna switch K1 and the first adjusting matching circuit L1 in the first antenna adjusting circuit S1 can be realized by:
Referring to fig. 6D, one end of the first antenna switch K1 is connected to one end of the first adjusting matching circuit L1, and the other end of the first antenna adjusting circuit S1 is grounded; or,
referring to fig. 6E, one end of the first adjusting matching circuit L1 is connected to one end of the first antenna switch K1, and the other end of the first antenna switch K1 is grounded.
In some possible connection manners, if the first antenna adjusting circuit S1 includes a plurality of branches, as shown in fig. 6E, two connection manners of the first antenna switch K1 and the first adjusting matching circuit L1 shown in fig. 6C and fig. 6D may exist at the same time.
In this embodiment of the application, the number of branches included in the first antenna adjustment circuit S1 may be set according to practical situations, and the application does not limit this. Illustratively, the number of branches included in the first antenna adjustment circuit S1 may be determined by:
for example, when the first antenna adjusting circuit S1 is in the off state, the frequency of the first resonance includes 1710MHz to 1880MHz, the communication frequency band of the first antenna ANT1 includes 1850MHz to 1990MHz in addition to 1710MHz to 1880MHz, the first antenna adjusting circuit S1 may include a branch, and the frequency of the first resonance when the branch is in the on state includes 1850MHz to 1990MHz, and the first antenna ANT1 may also operate in the 1850MHz to 1990MHz band. For another example, when the first antenna adjusting circuit S1 is in the off state, the frequency of the first resonance includes 1710MHz to 1880MHz, the communication frequency band of the first antenna ANT1 includes two frequency bands of 1850MHz to 1990MHz and 1920MHz to 2170MHz in addition to 1710MHz to 1880MHz, the first antenna ANT1 may include two branches, where when one branch is in the on state, the frequency of the first resonance includes 1850MHz to 1990MHz, the first antenna ANT1 may also operate in the frequency band of 1850MHz to 1990MHz, and when the other branch is in the on state, the frequency of the first resonance includes 1920MHz to 2170MHz, and the first antenna ANT1 may also operate in the frequency band of 1850MHz to 1990 MHz.
In this embodiment, by adding the first antenna adjusting circuit S1 to the first antenna ANT1, the first antenna adjusting circuit S1 may adjust the frequency of the first resonance to meet the communication frequency band of the terminal device when the first antenna ANT1 cannot meet the communication frequency band of the terminal device.
Optionally, as shown in fig. 7, the second antenna ANT2 may further include: and a second antenna adjusting circuit S2, the second antenna adjusting circuit S2 being for adjusting a frequency of the seventh resonance. The second antenna adjusting circuit S2 may include at least one branch, and each branch is provided with a second antenna switch K2 and a second adjusting matching circuit L2 which are electrically connected.
For specific contents of the second antenna switch K2, reference may be made to the description of the first antenna switch K1, which is not described herein again. For the details of the second adjustment matching circuit L2, reference may be made to the description of the first adjustment matching circuit L1, which is not described herein again.
In a possible connection manner, the second radiation branch F2 may be connected to one end of the second antenna adjusting circuit S2 and one end of the second matching circuit 203 through the second feeding point 201, the other end of the second antenna adjusting circuit S2 is grounded, and the other end of the second matching circuit 203 is connected to the second feed 202.
In another possible connection mode, the second radiation branch F2 is connected to one end of the second matching circuit 203 through the second feeding point 201, the other end of the second matching circuit 203 is connected to the second feed 202, the second radiation branch F2 is connected to one end of the second antenna adjusting circuit S2 through the second connection point, and the other end of the second antenna adjusting circuit S2 is grounded.
For the connection relationship among the second feeding point 201, the second antenna switch K2, and the second adjustment matching circuit L2, reference may be made to the description of the connection relationship among the first feeding point 101, the first antenna switch K1, and the first adjustment matching circuit L1, which is not described herein again.
The number of branches included in the second antenna adjusting circuit S2 may be set according to practical situations, and the present application is not limited thereto. For example, when the second antenna adjusting circuit S2 is in the off state, the frequency of the seventh resonance includes 880MHz to 960MHz, and the communication frequency band of the second antenna ANT2 includes a frequency band of 824MHz to 896MHz in addition to 880MHz to 960MHz, the second antenna adjusting circuit S2 may include a branch, and when the branch is in the on state, the frequency of the seventh resonance includes 824MHz to 896MHz, the second antenna ANT2 may also operate in the frequency band of 824MHz to 896 MHz. For another example, when the second antenna adjusting circuit S2 is in the off state, the frequency of the seventh resonance includes 880MHz to 960MHz, and the communication band of the second antenna ANT2 includes two frequency bands of 824MHz to 894MHz and 791MHz to 862MHz besides 880MHz to 960MHz, the second antenna adjusting circuit S2 may include two branches, where when one branch is in the on state, the frequency of the seventh resonance includes 824MHz to 894MHz, the second antenna ANT2 may further operate in 824MHz to 894MHz, and when the other branch is in the on state, the frequency of the seventh resonance includes 791MHz to 862MHz, the second antenna ANT2 may further operate in 791MHz to 862 MHz.
Optionally, as shown in fig. 7, the third antenna ANT3 may further include: the third antenna adjusting circuit S3 and the third antenna adjusting circuit S3 are used to adjust the frequency of the fourth resonance. The third antenna adjusting circuit S3 may include at least one branch, and each branch is provided with a third antenna switch K3 and a third adjusting matching circuit L3, which are electrically connected.
For details of the third antenna switch K3, reference may be made to the description of the first antenna switch K1, which is not described herein again. For details of the third adjustment matching circuit L3, reference may be made to the description of the first adjustment matching circuit L1, and details thereof are not repeated here.
In a possible connection manner, the third radiation branch F3 is connected to one end of the third antenna adjusting circuit S3 and one end of the third matching circuit 303 through the third feeding point 301, the other end of the third antenna adjusting circuit S3 is grounded, and the other end of the third matching circuit 303 is connected to the third feed 302.
In another possible connection mode, the third radiation branch F3 is connected to one end of the third matching circuit 303 through the third feeding point 301, the other end of the third matching circuit 303 is connected to the third feed 302, the third radiation branch F3 is connected to one end of the third antenna adjusting circuit S3 through the third connection point, and the other end of the third antenna adjusting circuit S3 is grounded.
In addition, for the connection relationship among the third feeding point 301, the third antenna switch K3 and the third adjusting matching circuit L3, reference may be made to the description of the connection relationship among the first feeding point 101, the first antenna switch K1 and the first adjusting matching circuit L1, and details are not repeated here.
The third antenna adjusting circuit S3 operates in a manner similar to that of the first antenna adjusting circuit S1 and the second antenna adjusting circuit S2, and reference may be made to the detailed description of the first antenna adjusting circuit S1 and the second antenna adjusting circuit S2, which is not repeated herein.
Optionally, referring to fig. 7, the fourth antenna ANT4 further includes: the fourth antenna adjusting circuit S4 and the fourth antenna adjusting circuit S4 are used to adjust the frequency of the eighth resonance. The fourth antenna adjusting circuit S4 may include at least one branch, and each branch is provided with a fourth antenna switch K4 and a fourth adjusting matching circuit L4, which are electrically connected.
For details of the fourth antenna switch K4, reference may be made to the description of the first antenna switch K1, which is not described herein again. For details of the fourth adjustment matching circuit L4, reference may be made to the description of the first adjustment matching circuit L1, and details thereof are not repeated here.
In this embodiment, in a possible connection manner, the fourth radiation branch F4 is connected to one end of the fourth antenna adjusting circuit S4 and one end of the fourth matching circuit 403 through the fourth feeding point 401, respectively, the other end of the fourth antenna adjusting circuit S4 is grounded, and the other end of the fourth matching circuit 403 is connected to the other end of the fourth feed 402.
In another possible connection manner, the fourth radiation branch F4 is connected to one end of the fourth matching circuit 403 through the fourth feeding point 401, the other end of the fourth matching circuit 403 is connected to the fourth feed 402, the fourth radiation branch F4 is connected to one end of the fourth antenna adjusting circuit S4 through a fourth connection point (not shown in fig. 7), and the other end of the fourth antenna adjusting circuit S4 is grounded.
In addition, for the connection relationship among the fourth feeding point 401, the fourth antenna switch K4 and the fourth adjusting matching circuit L4, reference may be made to the description of the connection relationship among the first feeding point 101, the first antenna switch K1 and the first adjusting matching circuit L1, and details are not repeated here.
The fourth antenna adjusting circuit S4 operates in a manner similar to that of the first antenna adjusting circuit S1 and the second antenna adjusting circuit S2, and reference may be made to the detailed description of the first antenna adjusting circuit S1 and the second antenna adjusting circuit S2, which is not repeated herein.
In this embodiment, by adding a corresponding antenna adjusting circuit to one or more of the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4, not only the bandwidth requirement on antenna resonance can be reduced, but also the diversified communication frequency bands of the terminal device can be satisfied.
EXAMPLE III
Fig. 8 is a schematic structural diagram of a terminal device according to another embodiment of the present application; fig. 9A is a schematic structural diagram of a fifth antenna of a terminal device according to an embodiment of the present application; fig. 9B is a schematic structural diagram of a fifth antenna of a terminal device according to another embodiment of the present application; fig. 9C is a schematic structural diagram of a fifth antenna of a terminal device according to another embodiment of the present application; fig. 9D is a schematic structural diagram of a fifth antenna of a terminal device according to another embodiment of the present application.
In this embodiment, fig. 8 to 9D are schematic diagrams of a back side of the terminal device, an original point in the coordinate system shown in fig. 8 to 9D is a geometric center point of the terminal device, a Z-axis direction is a direction from a front side of the terminal device to the back side of the terminal device, a Y-axis direction is a direction from a bottom side of the terminal device to a top side of the terminal device, an X-axis is a direction from right to left along a metal frame of the terminal device, and the X-axis is perpendicular to the Y-axis and the Z-axis, respectively.
In practical application, the terminal device usually has multiple wireless communication functions such as cellular, wifi, bluetooth and GPS, and accordingly, the terminal device usually includes a main antenna, a diversity antenna, a wifi antenna, a bluetooth antenna and a GPS antenna. With the solution in the above embodiment, each antenna may be set through several possible implementations:
A first possible implementation: setting the first antenna ANT1 as a diversity antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 being used to implement the first communication frequency of the diversity antenna, the second antenna ANT2 being set as a diversity antenna, the seventh resonance provided by the second antenna ANT2 being used to implement the second communication frequency of the diversity antenna; the third antenna ANT3 is set as a main set antenna, and specifically, the fourth resonance, the fifth resonance, and the sixth resonance provided by the third antenna ANT3 are used to implement the first communication frequency of the main set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to implement the third communication frequency of the main set antenna. The second communication frequency and the third communication frequency may be the same or different.
In addition, if the superimposed frequency of the first resonance, the second resonance, and the third resonance includes 1575.42MHz, the first antenna ANT1 may be further set as a GPS antenna; if the communication frequency of the diversity antenna does not include the second communication frequency or the superimposed frequency of the first resonance, the second resonance, and the third resonance does not include 1575.42MHz, the second antenna ANT2 may be set as a GPS antenna, and the frequency of the seventh resonance includes 1575.42MHz or 1176.45 MHz.
A second possible implementation: the third antenna ANT3 is set as a diversity antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna ANT3 are used to realize the first communication frequency of the diversity antenna, the fourth antenna ANT4 is set as a diversity antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to realize the third communication frequency of the diversity antenna; the first antenna ANT1 is set as a main set antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the main set antenna, the second antenna ANT2 is set as a main set antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing the second communication frequency of the main set antenna.
In addition, if the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes 1575.42MHz, the third antenna ANT3 may be further set as a GPS antenna; if the communication frequency of the diversity antenna does not include the third communication frequency or the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance does not include 1575.42MHz, the fourth antenna ANT4 may be set as a GPS antenna, and the frequency of the seventh resonance includes 1575.42MHz or 1176.45 MHz.
A third possible implementation: the first antenna ANT1 is set as a diversity antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the diversity antenna, and if the superposed frequency of the first resonance, the second resonance and the third resonance comprises 2400MHz-2500MHz, the first antenna ANT1 can be set as a wifi antenna, or a wifi antenna and a bluetooth antenna; the second antenna ANT2 is set as a GPS antenna, and the frequency of the seventh resonance provided by the second antenna ANT2 includes 1176.45MHz or 1575.42 MHz; the third antenna ANT3 is set as a master set antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna are used for realizing the first communication frequency of the master set antenna, the fourth antenna ANT4 is set as the master set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used for realizing the third communication frequency of the master set antenna.
In addition, if the superimposed frequency of the first resonance, the second resonance and the third resonance includes 1575.42MHz, the first antenna ANT1 may be further set as a GPS antenna, and accordingly, the frequency of the seventh resonance provided by the second antenna ANT2 includes 1176.45 MHz.
A fourth possible implementation: the first antenna ANT1 is set as a main set antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the main set antenna, the second antenna ANT2 is set as a main set antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing the second communication frequency of the main set antenna; the third antenna ANT3 is set to be a diversity antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna ANT3 are used for realizing the first communication frequency of the diversity antenna, and if the frequency obtained by superposing the fourth resonance, the fifth resonance and the sixth resonance includes 2400MHz-2500MHz, the third antenna ANT3 can be set to be a wifi antenna, or a wifi antenna and a bluetooth antenna; the fourth antenna ANT4 is provided as a GPS antenna, and the frequency of the eighth resonance provided by the fourth antenna ANT4 includes 1176.45MHz or 1575.42 MHz.
In addition, if the superimposed frequency of the fourth resonance, the fifth resonance and the sixth resonance includes 1575.42MHz, the third antenna ANT3 may be further configured as a GPS antenna, and accordingly, the frequency of the eighth resonance provided by the fourth antenna ANT4 includes 1176.45 MHz.
In order to better satisfy the diversified wireless communication frequency bands of the terminal device, the embodiment provides the terminal device, which ensures the OTA performance of the top antenna and the bottom antenna, and can also satisfy the diversified wireless communication frequency bands of the terminal device on the basis that the head mode SAR of the top antenna and the body SAR of the bottom antenna are low.
In addition to the above embodiments, the first metal bezel segment T1 or the third metal bezel segment T3 is provided with the fifth slot a5, and the fifth slot a5 divides the first metal bezel segment T1 or the third metal bezel segment T3 into two parts, and the fifth antenna ANT5 can provide the ninth resonance of the left-hand mode by forming a part of the fifth antenna ANT5 through a part of the metal bezel segments.
In this embodiment, the fifth slit a5 is provided in the first metal bezel section T1 for example.
Referring to fig. 8, the fifth slot a5 is located between the first ground point GND1 and the fourth ground point GND4, and the first metal bezel section T1 is divided into two parts by the fifth slot a5, where the two parts are: a fifth metal bezel segment T5 and a sixth metal bezel segment T6. In the embodiment of the present application, the fifth antenna ANT5 may be implemented by the fifth metal bezel segment T5, and the fifth antenna ANT5 may also be implemented by the sixth metal bezel segment T6. In the following, two possible implementations are described in detail.
First, a fifth antenna ANT5 is realized by a fifth metal frame segment T5
Specifically, the fifth metal bezel segment T5 is located between the first slot a1 and the fifth slot a5, and at least a second ground point GND2 is disposed on the fifth metal bezel segment T5.
As shown in fig. 8 and 9A, when only one grounding point (the first grounding point GND1) is disposed on the fifth metal bezel section T5, the fifth grounding point GND5 and the first grounding point GND1 are the same grounding point, wherein the fifth radiation branch F5 includes the metal bezel sections between the fifth grounding point GND5 and the fifth slot a 5.
Referring to fig. 9B, when a plurality of grounding points are disposed on the fifth metal bezel segment T5, the plurality of grounding points at least include a first grounding point GND1 and a fifth grounding point GND5, wherein the first grounding point GND1 is the closest grounding point to the first gap a1 among a plurality of grounding points on the fifth metal bezel segment T5, the fifth grounding point GND5 is the closest grounding point to the fifth gap a5 among a plurality of grounding points on the fifth metal bezel segment T5, the first radiation branch section F1 includes a metal bezel segment between the first grounding point GND1 and the first gap a1, and the fifth radiation branch section F5 includes a metal bezel segment between the fifth gap GND5 and the fifth gap a 5.
As shown in fig. 9A and 9B, one end of the fifth radiating branch F5 near the fifth slot a5 is connected to the fifth feed 502 through the fifth feed point 501, the fifth radiating branch F5 receives an electrical signal input by the fifth feed 502 through the fifth feed point 501, the fifth radiating branch F5 is connected to the fifth ground point GND5 to form a part of the fifth antenna ANT5, the fifth antenna ANT5 is configured to provide a ninth resonance of a left-hand mode, and a frequency of the ninth resonance includes a fourth communication frequency. Wherein the frequency range of the fourth communication frequency and the first communication frequency is different.
The specific structure of the fifth feeding point 501 may refer to the detailed description of the first feeding point 101, and the specific structure of the fifth feeding point 502 may refer to the detailed description of the first feeding point 102, which are not described herein again.
It should be noted that, when one ground point is disposed on the fifth metal frame section T5, the fifth ground point GND5 and the first ground point GND1 are the same ground point, and when a plurality of ground points are disposed on the fifth metal frame section T5, the fifth ground point GND5 is the ground point closest to the fifth gap a5 among the ground points on the fifth metal frame section.
When the fifth feed source 502 inputs an electrical signal to the fifth radiation branch F5, the fifth radiation branch F5 can excite the radio frequency electromagnetic field, and radiate an electromagnetic wave to the space, so as to form a ninth resonance of the left-hand mode, wherein the length of the fifth radiation branch F5 may be a quarter of the wavelength of the ninth resonance. For example, when the first possible implementation manner or the second possible implementation manner is adopted, the fifth antenna ANT5 may be set to be a wifi antenna, or a wifi antenna and a bluetooth antenna, and then the frequency of the ninth resonance includes 2400MHz to 2500 MHz. For example, when the third possible implementation manner or the fourth possible implementation manner is adopted, the fifth antenna ANT5 may be set as a diversity antenna, and the ninth resonance is used to implement other communication frequencies of the diversity antenna than the first communication frequency, for example, the frequency of the ninth resonance may include 880-960 MHz.
When the first possible implementation manner or the second possible implementation manner is adopted, the fifth antenna ANT5 may be set to be a GPS antenna or a wifi antenna and a bluetooth antenna. In some embodiments, a radiating branch may be added to the fifth antenna ANT5 to make the fifth antenna provide other resonances, the frequencies of which may include 1575.42MHz or 1176.45MHz, and the fifth antenna ANT5 may also be configured as a GPS antenna.
With the third possible implementation manner or the fourth possible implementation manner, the fifth antenna ANT5 may be set to be a diversity antenna, and the ninth resonance is used to implement other communication frequencies of the diversity antenna except the first communication frequency.
In the embodiment of the application, by setting the fifth slot a5 on the first metal bezel segment T1 of the terminal device, the first metal bezel segment T1 is divided into the fifth metal bezel segment T5 and the sixth metal bezel segment T6 through the fifth slot a5, a part of the fifth antenna ANT5 is formed by using the fifth metal bezel segment T5, the fifth antenna ANT5 can be set as a GPS antenna, or a GPS antenna and a wifi antenna, or a diversity antenna, so that the diversified communication frequency bands of the terminal device can be better satisfied.
Optionally, the fifth antenna ANT5 further includes a fifth matching circuit 503, the fifth radiating branch F5 is connected to one end of the fifth matching circuit 503 through a fifth feeding point 501, and the other end of the fifth matching circuit 503 is connected to the fifth feed 502.
For example, the fifth matching circuit 503 may include a parallel capacitor or a series inductor or a parallel inductor or a series capacitor, or a parallel capacitor and a series inductor, or a series capacitor and a parallel inductor. The connection manner of the fifth matching circuit 503, the fifth radiation branch F5, the fifth feeding point 501 and the fifth feed 502 is similar to the connection manner of the first matching circuit 103, the first radiation branch F1, the first feeding point 101 and the first feed 102, and reference may be made to the detailed description of the connection manner of the first matching circuit 103, the first radiation branch F1, the first feeding point 101 and the first feed 102, which is not repeated herein.
The fifth matching circuit 503 can adjust the impedance of the ninth resonance so that the return loss value of the ninth resonance is smaller, and the OTA performance is higher when the fifth antenna ANT5 operates at the ninth resonance.
Secondly, a fifth antenna ANT5 is realized by a sixth metal frame segment T6
Specifically, the sixth metal frame segment T6 is located between the fourth gap a4 and the fifth gap a5, and at least a fourth grounding point GND4 is disposed on the sixth metal frame segment T6.
Referring to fig. 9C, when only one grounding point (the fourth grounding point GND4) is disposed on the sixth metal bezel segment T6, the fifth grounding point GND5 and the fourth grounding point GND4 are the same grounding point, wherein the fifth radiation branch F5 includes the metal bezel segments between the fifth slots a5 in the fifth grounding point GND 5.
Referring to fig. 9D, when a plurality of grounding points are disposed on the sixth metal frame segment T6, the plurality of grounding points at least include a fourth grounding point GND4 and a fifth grounding point GND5, wherein the fourth grounding point GND4 is the closest grounding point to the fourth slit a4 among the plurality of grounding points on the sixth metal frame segment T6, the fifth grounding point GND5 is the closest grounding point to the fifth slit a5 among the plurality of grounding points on the sixth metal frame segment T6, the fourth radiation branch section F4 includes metal frame segments between the fourth GND4 and the fourth slit a4, and the fifth radiation branch section F5 includes metal frame segments between the fifth GND5 and the fifth slit a 5.
As shown in fig. 9C and 9D, one end of the fifth radiating branch F5 near the fifth slot a5 is connected to the fifth feed 502 through the fifth feed point 501, the fifth radiating branch F5 receives an electrical signal input by the fifth feed 502 through the fifth feed point 501, the fifth radiating branch F5 is connected to the fifth ground point GND5 to form a part of the fifth antenna ANT5, the fifth antenna ANT5 is configured to provide a ninth resonance of the left-hand mode, and a frequency of the ninth resonance includes a fourth communication frequency. Wherein the frequency range of the fourth communication frequency and the first communication frequency is different.
The specific structure of the fifth feeding point 501 may refer to the detailed description of the first feeding point 101, and the specific structure of the fifth feeding point 502 may refer to the detailed description of the first feeding point 102, which are not described herein again.
It should be noted that, when one grounding point is disposed on the sixth metal frame section T6, the fifth grounding point GND5 and the fourth grounding point GND4 are the same grounding point, and when a plurality of grounding points are disposed on the sixth metal frame section T6, the fifth grounding point GND5 is the grounding point closest to the fifth gap a5 among the plurality of grounding points on the fifth metal frame section.
When the fifth feed source 502 inputs an electrical signal to the fifth radiation branch F5, the fifth radiation branch F5 can excite the radio frequency electromagnetic field, and radiate an electromagnetic wave to the space, so as to form a ninth resonance of the left-hand mode, wherein the length of the fifth radiation branch F5 may be a quarter of the wavelength of the ninth resonance. For example, when the first possible implementation manner or the second possible implementation manner is adopted, the fifth antenna ANT5 may be set to be a wifi antenna, or a wifi antenna and a bluetooth antenna, and the frequency of the ninth resonance includes 2400MHz to 2500 MHz. For example, when the third possible implementation manner or the fourth possible implementation manner is adopted, the fifth antenna ANT5 may be configured as a diversity antenna, and the ninth resonance is used to implement other communication frequencies of the diversity antenna besides the first communication frequency, for example, the frequency of the ninth resonance may include 880-.
When the first possible implementation manner or the second possible implementation manner is adopted, the fifth antenna ANT5 may be set to be a GPS antenna or a wifi antenna and a bluetooth antenna. In some embodiments, a radiating branch may be added to the fifth antenna ANT5 to make the fifth antenna provide other resonances, the frequencies of which may include 1575.42MHz or 1176.45MHz, and the fifth antenna ANT5 may also be configured as a GPS antenna.
With the third possible implementation manner or the fourth possible implementation manner, the fifth antenna ANT5 may be set to be a diversity antenna, and the ninth resonance is used to implement other communication frequencies of the diversity antenna except the first communication frequency.
The terminal equipment that this application embodiment provided, through set up fifth gap A5 on terminal equipment's first metal frame section T1 and cut apart into fifth metal frame section T5 and sixth metal frame section T6 with first metal frame section T1, utilize sixth metal frame section T6 to form a part of fifth antenna ANT5, fifth antenna ANT5 can set up to GPS antenna or GPS and wifi antenna, or diversity antenna, can satisfy the diversified wireless communication frequency channel of terminal equipment better.
Optionally, the fifth antenna ANT5 further includes a fifth matching circuit 503, the fifth radiating branch F5 is connected to one end of the fifth matching circuit 503 through a fifth feeding point 501, and the other end of the fifth matching circuit 503 is connected to the fifth feed 502.
For example, the fifth matching circuit 503 may include a parallel capacitor or a series inductor, or a parallel inductor or a series capacitor, or a parallel capacitor and a series inductor, or a series capacitor and a parallel inductor. The connection manner of the fifth matching circuit 503, the fifth radiation branch F5, the fifth feeding point 501 and the fifth feed 502 is similar to the connection manner of the first matching circuit 103, the first radiation branch F1, the first feeding point 101 and the first feed 102, and reference may be made to the detailed description of the connection manner of the first matching circuit 103, the first radiation branch F1, the first feeding point 101 and the first feed 102, which is not repeated herein.
The fifth matching circuit 503 can adjust the impedance of the ninth resonance so that the return loss value of the ninth resonance is smaller, and the OTA performance is higher when the fifth antenna ANT5 operates at the ninth resonance.
In some embodiments, the fifth slot a5 may also be disposed on the third metal frame section T3, and when the fifth slot a5 is disposed on the third metal frame section T3, the fifth slot a5 is located between the second grounding point GND2 and the third grounding point GND3, and the implementation manner of disposing the fifth slot a5 on the third metal frame section T3 is similar to that of disposing the fifth slot a5 on the first metal frame section T1, and will not be described herein again.
Example four
Fig. 10 is a schematic structural diagram of a terminal device according to another embodiment of the present application; fig. 11A is a schematic structural diagram of a sixth antenna of a terminal device according to an embodiment of the present application; fig. 11B is a schematic structural diagram of a sixth antenna of a terminal device according to another embodiment of the present application; fig. 11C is a schematic structural diagram of a sixth antenna of a terminal device according to another embodiment of the present application; fig. 11D is a schematic structural diagram of a sixth antenna of a terminal device according to another embodiment of the present application.
In this embodiment, fig. 10 to 11D are schematic diagrams of the back of the terminal device, an origin point in a coordinate system shown in fig. 10 to 11D is a geometric center point of the terminal device, a Z-axis direction is a direction from the front of the terminal device to the back of the terminal device, a Y-axis direction is a direction from the bottom edge of the terminal device to the top edge of the terminal device, an X-axis is a direction from right to left along a metal frame of the terminal device, and the X-axis is perpendicular to the Y-axis and the Z-axis respectively.
In practical applications, the terminal device usually has multiple wireless communication functions such as cellular, wifi, bluetooth and GPS, and accordingly, the terminal device usually includes a main antenna, a diversity antenna, a wifi antenna, a bluetooth antenna and a GPS antenna. With the solution in the above embodiment, each antenna may be set through several possible implementations:
a first possible implementation: setting the first antenna ANT1 as a diversity antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 being used to implement the first communication frequency of the diversity antenna, the second antenna ANT2 being set as a diversity antenna, the seventh resonance provided by the second antenna ANT2 being used to implement the second communication frequency of the diversity antenna; the third antenna ANT3 is set as a main set antenna, and specifically, the fourth resonance, the fifth resonance, and the sixth resonance provided by the third antenna ANT3 are used to implement the first communication frequency of the main set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to implement the third communication frequency of the main set antenna. The second communication frequency and the third communication frequency may be the same or different.
The fifth antenna ANT5 is set to be a GPS antenna, and if the superimposed frequency of the first resonance, the second resonance, and the third resonance includes 1575.42MHz, the frequency of the ninth resonance includes 1176.45 MHz; if the communication frequency of the diversity antenna does not include the second communication frequency or the superimposed frequency of the first resonance, the second resonance and the third resonance does not include 1575.42MHz, the frequency of the ninth resonance may include 1575.42MHz or 1176.45 MHz.
A second possible implementation: the third antenna ANT3 is set as a diversity antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna ANT3 are used for realizing the first communication frequency of the diversity antenna, the fourth antenna ANT4 is set as a diversity antenna, and the eighth resonance provided by the fourth antenna ANT4 is used for realizing the third communication frequency of the diversity antenna; the first antenna ANT1 is set as a master set antenna, the first resonance, the second resonance, and the third resonance provided by the first antenna ANT1 are used to implement the first communication frequency of the master set antenna, the second antenna ANT2 is set as a master set antenna, and the seventh resonance provided by the second antenna ANT2 is used to implement the second communication frequency of the master set antenna.
Setting the fifth antenna ANT5 as a GPS antenna, and if the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes 1575.42MHz, the frequency of the ninth resonance includes 1176.45 MHz; if the communication frequency of the diversity antenna does not include the third communication frequency or the superimposed frequency of the fourth resonance, the fifth resonance and the sixth resonance does not include 1575.42MHz, the frequency of the ninth resonance may include 1575.42MHz or 1176.45 MHz.
A third possible implementation: setting the first antenna ANT1 as a diversity antenna, the first resonance second resonance and the third resonance provided by the first antenna ANT1 being used to realize the first communication frequency of the diversity antenna; the second antenna ANT2 is set as a GPS antenna, and the frequency of the seventh resonance provided by the second antenna ANT2 includes 1176.45MHz or 1575.42 MHz; the third antenna ANT3 is set as a main set antenna, the fourth resonance, the fifth resonance, and the sixth resonance provided by the third antenna ANT3 are used to implement the first communication frequency of the main set antenna, the fourth antenna ANT4 is set as a main set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to implement the third communication frequency of the main set antenna.
In addition, if the superimposed frequency of the first resonance, the second resonance and the third resonance includes 1575.42MHz, the first antenna ANT1 may be further set as a GPS antenna, and accordingly, the frequency of the seventh resonance provided by the second antenna ANT2 includes 1176.45 MHz.
A fourth possible implementation: the first antenna ANT1 is set as a main set antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the main set antenna, the second antenna ANT2 is set as a main set antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing the second communication frequency of the main set antenna; the third antenna ANT3 is set as a diversity antenna, and the fourth resonance, the fifth resonance, and the sixth resonance provided by the third antenna ANT3 are used to implement the first communication frequency of the diversity antenna; the fourth antenna ANT4 is provided as a GPS antenna, and the frequency of the eighth resonance provided by the fourth antenna ANT4 includes 1176.45MHz or 1575.42 MHz.
In addition, if the superimposed frequency of the fourth resonance, the fifth resonance and the sixth resonance includes 1575.42MHz, the third antenna ANT3 may be further configured as a GPS antenna, and accordingly, the frequency of the eighth resonance provided by the fourth antenna ANT4 includes 1176.45 MHz.
In order to better satisfy diversified wireless communication bands of the terminal device, the present embodiment provides a terminal device, which ensures OTA performance at the first communication frequency of the top antenna and the bottom antenna of the terminal device, and a lower SAR in the head mode and/or the head mode of the top antenna and a lower SAR in the bottom antenna, and can satisfy the diversified wireless communication bands of the terminal device on the basis that SAR-related standards can be satisfied without backspacing input power.
Referring to fig. 10, the metal bezel further includes a sixth gap a6, and the sixth gap a6 is disposed on the first metal bezel section T1 or the third metal bezel section T3. Specifically, if the fifth slot a5 is disposed on the first metal frame section T1, the sixth slot a6 may be disposed on the third metal frame section T3, and if the fifth slot a5 is disposed on the third metal frame section T3, the sixth slot a6 may be disposed on the first metal frame section T1. The sixth slot a6 divides the first metal frame segment T1 or the third metal frame segment T3 into two parts, and the sixth antenna ANT6 can provide a tenth resonance of a left-hand mode by one of the metal frame segments forming a part of the sixth antenna ANT 6.
In this embodiment, the fifth gap a5 and the sixth gap a6 are provided in the first metal frame section T1 and the third metal frame section T3, respectively, for example, in detail.
Referring to fig. 10, the sixth slot a6 is located between the second ground point GND2 and the third ground point GND3, and the third metal bezel section T3 is divided into two parts by the sixth slot a6, where the two parts are: a seventh metal bezel segment T7 and an eighth metal bezel segment T8. In this embodiment, the sixth antenna ANT6 may be implemented by the seventh metal bezel segment T7, and the sixth antenna ANT6 may also be implemented by the eighth metal bezel segment. In the following, two possible implementations are described in detail.
First, a sixth antenna ANT6 is implemented by a seventh metal bezel segment T7
Specifically, the seventh metal bezel segment T7 is located between the second slot a2 and the sixth slot a6, and at least the first ground point GND1 is disposed on the seventh metal bezel segment T7.
As shown in fig. 10 and 11A, when only one grounding point (the first grounding point GND1) is disposed on the seventh metal bezel section T7, the sixth grounding point GND6 and the second grounding point GND2 are the same grounding point, wherein the sixth radiation branch F6 includes the metal bezel sections between the sixth grounding point GND6 and the sixth slot a 6.
Referring to fig. 11B, when a plurality of grounding points are disposed on the seventh metal bezel section T7, the plurality of grounding points at least include a second grounding point GND2 and a sixth grounding point GND6, where the second grounding point GND2 is the closest grounding point to the second gap a2 among the plurality of grounding points on the seventh metal bezel section T7, the sixth grounding point GND6 is the closest grounding point to the sixth gap A6 among the grounding points on the seventh metal bezel section T7, the second radiating branch F2 includes a metal bezel section between the second grounding point GND2 and the second gap a2, and the sixth radiating branch F6 includes a metal bezel section between the sixth gap GND6 and the sixth gap A6.
As shown in fig. 10, 11A and 11B, one end of the sixth radiation branch F6 near the sixth slot a6 is connected to the sixth feed 602 through the sixth feed point 601, the sixth radiation branch F6 receives an electrical signal input by the sixth feed 602 through the sixth feed point 601, the sixth radiation branch F6 is connected to the sixth ground point GND6 to form a part of the sixth antenna ANT6, and the sixth antenna ANT6 is configured to provide a tenth resonance of a left-hand mode, where a frequency of the tenth resonance includes a fifth communication frequency, for example: the tenth resonance frequency includes 2400MHz to 2500MHz, and when each antenna is set by using the above several possible implementation manners, the sixth antenna ANT6 may be set as a wifi antenna, or a wifi antenna and a bluetooth antenna.
The specific structure of the sixth feeding point 601 may refer to the detailed description of the first feeding point 101, and the specific structure of the sixth feed 602 may refer to the detailed description of the first feed 102, which is not described herein again.
It should be noted that, when one grounding point is disposed on the seventh metal frame section T7, the sixth grounding point GND6 and the second grounding point GND2 are the same grounding point, and when a plurality of grounding points are disposed on the seventh metal frame section T7, the sixth grounding point GND6 is the grounding point closest to the sixth gap a6 among the grounding points on the seventh metal frame section T7.
When the sixth feed source 602 inputs an electrical signal to the sixth radiation branch F6, the sixth radiation branch F6 can excite radio frequency electromagnetic waves, and radiate electromagnetic waves to the space, so as to form a tenth resonance of a left-hand mode, wherein the length of the sixth radiation branch F6 may be a quarter of the wavelength of the tenth resonance.
In this application embodiment, through set up sixth gap a6 on terminal equipment's third metal frame section T3, divide into seventh metal frame section T7 and eighth metal frame section T8 with third metal frame section T3 through sixth gap a6, utilize seventh metal frame section T7 to form a part of sixth antenna ANT6, sixth antenna ANT6 can set up to the wifi antenna, perhaps wifi antenna and bluetooth antenna, thereby can satisfy the diversified wireless communication frequency channel of terminal equipment better.
Optionally, the sixth antenna ANT6 further includes a sixth matching circuit 603, the sixth radiating branch F6 is connected to one end of the sixth matching circuit 603 through the sixth feeding point 601, and the other end of the sixth matching circuit 603 is connected to the sixth feed 602.
For example, the sixth matching circuit 603 may include a parallel capacitor or a series inductor, or a parallel inductor or a series capacitor, or a parallel capacitor and a series inductor, or a series capacitor and a parallel inductor. The connection manner of the sixth matching circuit 603 and the sixth radiation branch F6, the sixth feeding point 601, and the sixth feed 602 is similar to the connection manner of the first matching circuit 103 and the first radiation branch F1, the first feeding point 101, and the first feed 102, and reference may be made to the detailed description of the connection manner of the first matching circuit 103 and the first radiation branch F1, the first feeding point 101, and the first feed 102, which is not described herein again.
The sixth matching circuit 603 may adjust the impedance of the tenth resonance so that the return loss value of the tenth resonance is smaller, and the OTA performance is higher when the sixth antenna ANT6 operates at the tenth resonance.
Secondly, a sixth antenna ANT6 is realized through the eighth metal frame segment T8
Specifically, the eighth metal bezel segment T8 is located between the third slot A3 and the sixth slot a6, and at least a third ground point GND3 is disposed on the eighth metal bezel segment T8.
As shown in fig. 10 and 11C, when only one grounding point (the third grounding point GND3) is disposed on the eighth metal frame section T8, the sixth grounding point GND6 and the third grounding point GND3 are the same grounding point, wherein the sixth radiation branch section F6 includes the metal frame sections between the sixth grounding point GND6 and the sixth gap a 6.
As shown in fig. 10 and 11D, when a plurality of grounding points are disposed on the eighth metal bezel section T8, the plurality of grounding points at least include a third grounding point GND3 and a sixth grounding point GND6, wherein the third grounding point GND3 is the closest grounding point to the third slot A3 among a plurality of grounding points on the eighth metal bezel section T8, the sixth grounding point GND6 is the closest grounding point to the sixth slot A6 among a plurality of grounding points on the eighth metal bezel section T8, the third radiating branch F3 includes a metal bezel section between the third grounding point GND3 and the third slot A3, and the sixth radiating branch F6 includes a metal bezel section between the sixth grounding point GND6 and the sixth slot A6.
As shown in fig. 10, 11C and 11D, one end of the sixth radiation branch F6 close to the sixth slot a6 is connected to the sixth feed 602 through the sixth feed point 601, the sixth radiation branch F6 receives an electrical signal input by the sixth feed 602 through the sixth feed point 601, the sixth radiation branch F6 is connected to the sixth ground point GND6 to form a part of the sixth antenna ANT6, and the sixth antenna ANT6 is configured to provide a tenth resonance of a left-hand mode, where a frequency of the tenth resonance includes a fifth communication frequency, for example: the tenth resonance frequency includes 2400MHz to 2500MHz, and when each antenna is set by using the above several possible implementation manners, the sixth antenna ANT6 may be set as a wifi antenna, or a wifi antenna and a bluetooth antenna.
The specific structure of the sixth feeding point 601 may refer to the detailed description of the first feeding point 101, and the specific structure of the sixth feeding point 602 may refer to the detailed description of the first feeding point 102, which are not described herein again.
It should be noted that, when one grounding point is disposed on the eighth metal frame section T8, the sixth grounding point GND6 and the third grounding point GND3 are the same grounding point, and when a plurality of grounding points are disposed on the eighth metal frame section T8, the sixth grounding point GND6 is the grounding point closest to the sixth gap a6 among the grounding points on the eighth metal frame section T8.
When the sixth feed source 602 inputs an electrical signal to the sixth radiation branch F6, the sixth radiation branch F6 can excite radio frequency electromagnetic waves, and radiate electromagnetic waves to the space, so as to form a tenth resonance of a left-hand mode, wherein the length of the sixth radiation branch F6 may be a quarter of the wavelength of the tenth resonance.
In the embodiment of the application, a sixth slit a6 is arranged on a third metal frame section T3 of the terminal device, the third metal frame section T3 is divided into a seventh metal frame section T7 and an eighth metal frame section T8 through the sixth slit a6, a part of a sixth antenna ANT6 is formed by the eighth metal frame section T8, the sixth antenna ANT6 can be set to be a wifi antenna, or the wifi antenna and a bluetooth antenna, and therefore diversified wireless communication frequency bands of the terminal device can be better met.
Optionally, the sixth antenna ANT6 further includes a sixth matching circuit 603, the sixth radiating branch F6 is connected to one end of the sixth matching circuit 603 through the sixth feeding point 601, and the other end of the sixth matching circuit 603 is connected to the sixth feed 602.
For example, the sixth matching circuit 603 may include a parallel capacitor or a series inductor, or a parallel inductor or a series capacitor, or a parallel capacitor and a series inductor, or a series capacitor and a parallel inductor. The connection manner of the sixth matching circuit 603 and the sixth radiation branch F6, the sixth feeding point 601, and the sixth feed 602 is similar to the connection manner of the first matching circuit 103 and the first radiation branch F1, the first feeding point 101, and the first feed 102, and reference may be made to the detailed description of the connection manner of the first matching circuit 103 and the first radiation branch F1, the first feeding point 101, and the first feed 102, which is not described herein again.
The sixth matching circuit 603 can adjust the impedance of the tenth resonance so that the return loss value of the tenth resonance is smaller, and the OTA performance is higher when the sixth antenna ANT6 operates at the tenth resonance.
In the terminal device provided in this embodiment, a fifth slit a5 is provided on a first metal bezel section T1 of the terminal device to divide a first metal bezel section T1 into a fifth metal bezel section T5 and a sixth metal bezel section T6, a fifth antenna ANT5 is formed by using the fifth metal bezel section T5 or the sixth metal bezel section T6, and the fifth antenna ANT5 at least provides a ninth resonance; further, a sixth slit a6 may be disposed on the third metal frame section T3 of the terminal device to divide the third metal frame section T3 into a seventh metal frame section T7 and an eighth metal frame section T8, the seventh metal frame section T7 or the eighth metal frame section T8 is used to implement a sixth antenna ANT6, the sixth antenna ANT6 at least provides a tenth resonance, and the ninth resonance and the tenth resonance are used to satisfy diversified wireless communication bands of the terminal device. The terminal device provided by this embodiment may also ensure OTA performance of the top antenna and the bottom antenna of the terminal device, and the head SAR of the top antenna and the body SAR of the bottom antenna are lower.
In some embodiments, the fifth gap a5 may be disposed on the third metal frame section T3, the sixth gap a6 may be disposed on the first metal frame section T1, the fifth gap a5 may be disposed on the third metal frame section T3, and when the sixth gap a6 is disposed on the first metal frame section T1, the structure and principle thereof are similar to those when the fifth gap a5 is disposed on the first metal frame section T1 and the sixth gap a6 is disposed on the third metal frame section T3, which will not be described herein again.
In a specific embodiment, the structure of the terminal device is as shown in fig. 7, and the antenna on the top of the terminal device is explained and analyzed in terms of reflection coefficient S11, radiation direction diagram, current distribution diagram, radiation efficiency, and system efficiency.
The reflection coefficient S11 is one of S parameters (i.e., scattering parameters), and represents return loss characteristics, and the dB value of S11 and impedance characteristics when the antenna operates at a certain communication frequency can be generally seen by a network analyzer. S11 can indicate the matching degree of the antenna and the front-end circuit, and the larger the value of the reflection coefficient S11 is, the larger the energy reflected by the antenna itself is, so that the matching of the antenna is worse. For example, the S11 value of antenna a at a frequency is-5 dB, the S11 value of antenna B at the same frequency is-10 dB, and the matching degree of antenna B at the frequency is better than that of antenna a.
The radiation pattern is a graph describing the relationship between the intensity of the electromagnetic waves radiated by the antenna and the spatial angle, and the complete radiation pattern is a three-dimensional spatial graph. The radiation pattern may also be referred to as an antenna pattern, a far-field pattern, or other names. The radiation pattern may be represented by a polar coordinate system, a rectangular coordinate system, a spherical coordinate system, etc., and is generally represented by the radiation patterns of two planes perpendicular to each other. When a radiation pattern is represented by polar coordinates, the length of the polar diameter represents the field intensity value of the antenna in the direction when the antenna works at a certain frequency point, the field intensity value is generally represented by dBi, and the larger the value of the polar diameter is, the better the antenna performance of the antenna at the position in the space is. In the embodiment of the present application, Theta is the angle of the XOY plane, and Phi is the angle of the ZOY plane. Optionally, the radiation characteristics of the respective antenna and the metal frame segment are illustrated here in a radiation direction diagram of two planes, Theta 90 °, Phi 0 °, Phi 90 °.
It should be noted that the rectangular coordinate system added to the radiation pattern in the embodiment of the present application is to illustrate the direction of the terminal device.
For a current profile, more arrows indicate a larger current profile, and less arrows indicate a smaller current profile.
As shown in fig. 7, the first antenna of the terminal device is a diversity antenna, and the first resonance, the second resonance, and the third resonance provided by the first antenna are used to implement a first communication frequency of the diversity antenna, where the first communication frequency includes: 1710MHz-2690MHz, the second antenna ANT2 is set as a GPS antenna, and the frequency of the seventh resonance provided by the second antenna ANT2 includes: 1176.45 MHz.
A graph of reflection coefficient S11 of the frequency after the first resonance, the second resonance, and the third resonance are superimposed is shown in fig. 12A, where the abscissa of fig. 12A represents the frequency (frequency) in GHz, the ordinate represents the reflection coefficient S11 in dB, and in fig. 12A, the frequency of mark1 is 1.5GHz, the frequency of mark2 is 1.6291GHz, the frequency of mark3 is 2.4041GHz, and the frequency of mark4 is 2.6277 GHz. Referring to fig. 12A, the first antenna has S11 values of less than-5 dB in 1710-2690MHz range, and the first antenna has better OTA performance at the first communication frequency due to smaller S11 values.
Curves of the radiation efficiency and the system efficiency of the first antenna at the first communication frequency in the free space state, the left-hand head-hand mode and the right-hand head-hand mode are shown in fig. 12B, wherein the abscissa in fig. 12B represents frequency (frequency) in GHz, the ordinate represents radiation efficiency (Rad efficiency) or system efficiency (Tot efficiency), and the radiation efficiency and the system efficiency are all in dB, in fig. 12B, curve "1" represents the system efficiency of the first antenna at the first communication frequency in the free space state, curve "2" represents the radiation efficiency of the first antenna at the first communication frequency in the free space state, curve "3" represents the system efficiency of the first antenna at the first communication frequency in the left-hand head-hand mode, curve "4" represents the radiation efficiency of the first antenna at the first communication frequency in the left-hand head-hand mode, curve "5" represents the system efficiency of the first antenna at the first communication frequency in the right-hand head-hand mode, and curve "6" represents the radiation efficiency of the first antenna at the first communication frequency in the right-hand head-hand mode.
Referring to fig. 12A and 12B, in the free space state, the radiation efficiency of the first antenna at the first communication frequency is greater than-2 dB, the system efficiency is greater than-3 dB, and both the radiation efficiency and the system efficiency are greater than-8 dB in the left-side first-hand mode and the right-side first-hand mode.
As shown in fig. 12C, 12D, and 12E, the current distribution of the terminal device at the first resonance, the second resonance, and the third resonance of the first antenna is uniform as seen from fig. 12C, 12D, and 12E.
The superimposed frequency of the first resonance, the second resonance, and the third resonance includes a first communication frequency, the first communication frequency includes 1.6GHz, and when the first antenna operates at the frequency point of 1.6GHz, radiation patterns of Theta 90 °, Phi 0 °, Theta 0 °, and Phi 90 ° are respectively as shown in fig. 12F and fig. 12G. Referring to fig. 12F, in the plane Theta 90 ° and Phi 0 °, the maximum main lobe amplitude is 1.9dBi, the maximum main lobe radiation direction is 58 °, the angular width of the main lobe is 96.9 °, and the maximum side lobe amplitude is-1.2 dBi; referring to fig. 12G, in the plane Theta of 0 ° and Phi of 90 °, the maximum main lobe amplitude is 2.28dBi and the maximum main lobe radiation direction is 141 °.
As shown in fig. 12F and 12G, when the antenna at the top of the terminal device works at the frequency point of 1.6GHz, the maximum radiation direction faces the outside of the terminal device, and the antenna radiates uniformly (without zero point) in all directions, and in addition, when the antenna at the top of the terminal device works at 1.6GHz, the current distribution on the printed circuit board is relatively dispersed, so that the SAR in the head mode or the head-hand mode can be reduced while the OTA performance of the antenna at the top of the terminal device is ensured.
The first communication frequency includes a frequency point of 2.260GHz, and radiation patterns of the first antenna at the frequency point of 2.260GHz at Theta 90 °, Phi 0 °, and Theta 0 °, Phi 90 ° are shown in fig. 12H and fig. 12I, respectively. Referring to fig. 12F, in the plane Theta is 90 ° and Phi is 0 °, the maximum main lobe amplitude is 2.54dBi, the main lobe maximum radiation direction is 90 °, the angular width of the main lobe is 70.7 °, and the maximum side lobe amplitude is-1.8 dBi; referring to fig. 12I, in the plane Theta of 0 ° and Phi of 90 °, the maximum main lobe amplitude is 2.89dBi and the maximum main lobe radiation direction is 136 °.
As shown in fig. 12H and fig. 12I, when the antenna at the top of the terminal device works at 2.260GHz, the maximum radiation direction faces the outside of the terminal device, and the antenna radiates uniformly (without zero point) in all directions, and in addition, when the antenna at the top of the terminal device works at 2.260GHz, the current distribution on the printed circuit board is relatively dispersed, so that the SAR in the head mode or the head-hand mode is reduced while the OTA performance of the antenna at the top of the terminal device is ensured.
The first communication frequency includes 2.41GHz, and radiation patterns of the antenna at the top of the terminal device at Theta 90 °, Phi 0 °, Theta 0 °, Phi 90 °, are shown in fig. 12J and fig. 12K, respectively, when the antenna operates at the frequency point of 2.41 GHz. Referring to fig. 12J, in a plane where Theta is 90 ° and Phi is 0 °, the maximum main lobe amplitude is 1.74dBi, the maximum main lobe radiation direction is 74 °, the angular width of the main lobe is 89.4 °, and the maximum side lobe amplitude is-2.4 dBi; referring to fig. 12K, in the plane Theta is 0 ° and Phi is 90 °, the maximum main lobe amplitude is 2.96dBi, the maximum main lobe radiation direction is 130 °, and the angular width of the main lobe is 343.5 °.
As shown in fig. 12J and 12K, when the antenna at the top of the terminal device works at the frequency point of 2.41GHz, the maximum radiation direction faces the outside of the terminal device, and the antenna radiates uniformly (without zero point) in all directions, and in addition, when the first antenna works at 2.41GHz, the current distribution on the printed circuit board of the terminal device is relatively dispersed, so that the SAR in the head mode or the head-hand mode is reduced while the OTA performance of the antenna at the top of the terminal device can be ensured.
The first communication frequency includes 2.8GHz, and when the antenna at the top of the terminal device operates at the frequency point of 2.8GHz, radiation patterns at Theta 90 °, Phi 0 °, Theta 0 °, and Phi 90 ° are shown in fig. 12L and fig. 12M, respectively. Referring to fig. 12L, in the plane Theta 90 ° and Phi 0 °, the maximum main lobe amplitude is 1.51dBi, the main lobe maximum radiation direction is 221 °, the angular width of the main lobe is 26.5 °, and the maximum side lobe amplitude is-0.7 dBi; referring to fig. 12M, in the plane Theta of 0 ° and Phi of 90 °, the main lobe amplitude maximum is 3.91dBi, the main lobe maximum radiation direction is 130 °, the angular width of the main lobe is 126.9 °, and the side lobe amplitude maximum is-0.9 dBi.
As shown in fig. 12L and 12M, when the antenna at the top of the terminal device works at the frequency point of 2.8GHz, the maximum radiation direction faces the outside of the terminal device, and the antenna radiates uniformly (without zero point) in all directions, and in addition, when the first antenna works at 2.8GHz, the current distribution on the printed circuit board of the terminal device is dispersed, so that the SAR in the head mode or the head-hand mode is reduced while the OTA performance of the antenna at the top of the terminal device is ensured.
By adopting the scheme in the embodiment of the present application, compared with the scheme in the prior art shown in fig. 1A and fig. 1B, the antenna at the top of the terminal device shown in fig. 1A needs to reduce the input power by 3dB, and the antenna at the top of the terminal device shown in fig. 1B needs to reduce the input power by 1.5dB, so that the SAR value equivalent to that of the terminal device provided in the embodiment of the present application can be achieved. In addition, according to the scheme in the embodiment of the application, the OTA performance reduction amplitude is small and is about 1dB when the top antenna is in the hand mode. By adopting the scheme provided by the embodiment of the application, the SAR of the antenna at the top in the head mode and the head-hand mode is lower on the basis of the OTA performance of the first communication frequency, and the relevant standard of the SAR can be met without backspacing the input power.
In this embodiment, the frequency at which the second antenna provides the seventh resonance comprises 1176.45MHz, and therefore the second antenna may be provided as a GPS antenna. The curve of the reflection coefficient S11 of the seventh resonance is shown in fig. 12N, and the radiation efficiency and the system efficiency of the seventh resonance in the free space state are shown in fig. 12O. The curve "1" in fig. 12O represents the radiation efficiency of the seventh resonance in the free space state, and the curve "2" in fig. 12N represents the system efficiency of the seventh resonance in the free space state, and it can be seen from fig. 12N and fig. 12O that the radiation efficiency is less than-3.5 dB when the first antenna operates at 1176.45 MHz.
The radiation patterns of the second antenna in the two planes Theta 90 deg., Phi 0 deg. and Theta 0 deg., Phi 90 deg. when operating at 1176.45MHz are shown in fig. 12P and 12Q, respectively. Referring to fig. 12P, in the plane Theta 90 ° and Phi 0 °, the maximum main lobe amplitude is 4.69dBi, the maximum main lobe radiation direction is 221 °, the angular width of the main lobe is 67.6 °, and the maximum side lobe amplitude is-5.0 dBi; referring to fig. 12Q, in the plane Theta 0 ° Phi 90 °, the main lobe amplitude is 3.36dBi at maximum, the main lobe maximum radiation direction is 147 °, and the angular width of the main lobe is 64 °.
In addition, when the second antenna of the terminal device operates at 1176.45MHz, the current distribution on the printed circuit board of the terminal device is as shown in fig. 12R.
In this embodiment, the fifth antenna is a diversity antenna, the frequency of the ninth resonance provided by the fifth antenna includes the second communication frequency, where the second communication frequency includes 880MHz-960MHz, a curve of the reflection coefficient S11 of the ninth resonance is shown as a curve "1" in fig. 12S, the radiation efficiency of the ninth resonance in the free space state is shown as a curve "2" in fig. 12S, and the system efficiency of the ninth resonance in the free space state is shown as a curve "3" in fig. 12S. When the second communication frequency of the diversity antenna is realized by the ninth resonance in combination with the curve "1", the curve "2" and the curve "3" in fig. 12S, the radiation efficiency is greater than-7 dB, and the system efficiency is greater than-8 dB.
When the structure of the terminal device is as shown in fig. 7, the third antenna is set as a main set antenna, the third antenna provides a fourth resonance, a fifth resonance, and a sixth resonance, a frequency obtained by superimposing the fourth resonance, the fifth resonance, and the sixth resonance includes a first communication frequency, and the first communication frequency includes: the plot of the reflection coefficient S11 of the third antenna at the first communication frequency from 1710MHz to 2690MHz is shown in fig. 12T, where the abscissa of fig. 12T represents frequency (frequency) in MHz and the ordinate represents system efficiency (Tot efficiency) in dB.
In fig. 12T, each of a curve "1 a", a curve "1 b", and a curve "1 c" represents the system efficiency of the third antenna at the first communication frequency in the free space state, each of a curve "2 a", a curve "2 b", and a curve "2 c" represents the system efficiency of the third antenna at the first communication frequency in the left-hand mode, and each of a curve "3 a", a curve "3 b", and a curve "3 c" represents the system efficiency of the third antenna at the first communication frequency in the right-hand mode. Referring to curves "1 a", 1b "and 1 c" in fig. 12T, the system efficiency of the third antenna at the first communication frequency in the free space state is greater than-6 dB, referring to curves "2 a", 2b "and 2 c" in fig. 12T, the system efficiency of the third antenna at the first communication frequency in the left-hand first-hand mode is greater than-12 dB, referring to curves "3 a", 3b "and 3 c" in fig. 12T, the system efficiency of the third antenna at the first communication frequency in the right-hand first-hand mode is greater than-14 dB. Referring to the curve "1 a" to the curve "3 c" in fig. 12T, the left-hand mode and the right-hand mode of the third antenna have smaller amplitude reductions than the free space state at the first communication frequency.
In this embodiment, the fourth antenna is set as a main set antenna, the fourth antenna provides an eighth resonance, and the eighth resonance may be used to implement a third communication frequency of the main set antenna. The working principle of the fourth antenna adjusting circuit can refer to the description in the above embodiments, and details are not repeated herein. When the fourth antenna adjusting circuit is in the off state and the two branches in the fourth antenna adjusting circuit are in the on state respectively, the system efficiency curve of the eighth resonance is shown in fig. 12U, the abscissa in fig. 12U represents frequency (frequency) in MHz, and the ordinate represents system efficiency (top efficiency) in dB.
Referring to fig. 12U, a curve "1 a" represents an S11 curve of the eighth resonance in the free space state when one of the branches of the fourth antenna adjusting circuit is in the on state; curve "1 b" represents the S11 curve for the eighth resonance in the free space state with the fourth antenna adjustment circuit in the off state; a curve "1 c" represents an S11 curve of the eighth resonance in the free space state when the other branch of the fourth antenna adjustment circuit is in the on state; a curve "2 a" represents an S11 curve of the eighth resonance when one of the branches of the fourth antenna adjusting circuit is in the on state and the left-hand mode is adopted; curve "2 b" represents the S11 curve for the eighth resonance in the left-hand head-hand mode with the fourth antenna adjusting circuit in the off state; a curve "2 c" represents an S11 curve of the eighth resonance when the other branch of the fourth antenna adjusting circuit is in a conducting state and the left-side head-hand mode is performed; curve "3 a" represents the S11 curve for the eighth resonance in the right-side head-hand mode with one of the branches in the fourth antenna adjusting circuit in the on state; curve "3 b" represents the S11 curve for the eighth resonance in the right-hand head-hand mode with the fourth antenna adjustment circuit in the off state; curve "3 c" represents the S11 curve for the eighth resonance in the right-hand-head mode, with the other branch of the fourth antenna adjusting circuit in the conducting state.
Referring to FIG. 12U, for example, the frequency of the eighth resonance shown by the curve "1 a" includes 698MHz-716MHz, the frequency of the eighth resonance shown by the curve "1 b" includes 791MHz-862MHz, and the frequency of the eighth resonance shown by the curve "1 c" includes 880MHz-960 MHz. In practical applications, the frequency of the eighth resonance may be adjusted by adjusting the inductance value of the inductor and/or the capacitance value of the capacitor in the fourth antenna adjusting circuit. The OTA performance of the antenna at the bottom of the terminal equipment at the first communication frequency is better, the body SAR is lower, the relevant standard of the SAR can be met without returning the input power, in addition, the low-frequency design can be also considered, and the diversified communication frequency band of the terminal equipment is met.
Example six
Fig. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present application; fig. 14A is a schematic structural diagram of a top portion of a terminal device according to an embodiment of the present application; fig. 14B is a schematic structural diagram of a top portion of a terminal device according to another embodiment of the present application; fig. 14C is a schematic structural diagram of a bottom portion of a terminal device according to an embodiment of the present application; fig. 14D is a schematic structural diagram of a bottom portion of a terminal device according to another embodiment of the present application; fig. 15A is a schematic structural diagram of a top portion of a terminal device according to another embodiment of the present application; fig. 15B provides a structural illustration of a top portion of a terminal device according to another embodiment of the present application; fig. 15C is a schematic structural diagram of a bottom portion of a terminal device according to another embodiment of the present application; fig. 15D is a schematic structural diagram of a bottom portion of a terminal device according to another embodiment of the present application.
In this embodiment, fig. 13 is a schematic diagram of a back surface of a terminal device, an origin point in a coordinate system shown in fig. 13 is a geometric center point of the terminal device, a Z-axis direction is a direction from a front surface of the terminal device to the back surface of the terminal device, a Y-axis direction is a direction from a bottom edge of the terminal device to a top edge of the terminal device, an X-axis is a direction from left to right along a metal frame of the terminal device, and the X-axis is perpendicular to the Y-axis and the Z-axis respectively.
Referring to fig. 13, the terminal device includes: the metal rear cover is provided with a seventh gap A7, an eighth gap A8, a ninth gap A9, a tenth gap A10, an eleventh gap A11 and a twelfth gap A12. The seventh slit a7, the eighth slit A8, the ninth slit a9, the tenth slit a10, the eleventh slit a11, and the twelfth slit a12 divide the metal rear cover into a plurality of portions: a first metal unit P1, a second metal unit P2, a third metal unit P3, a fourth metal unit P4, a fifth metal unit P5, a sixth metal unit P6, and a seventh metal unit P7.
Illustratively, the widths of the seventh gap a7, the eighth gap A8, the ninth gap a9, the tenth gap a10, the eleventh gap a11 and the twelfth gap a12 may be 0.8mm to 1.0mm, and the seventh gap a7, the eighth gap A8, the ninth gap a9, the tenth gap a10, the eleventh gap a11 and the twelfth gap a12 may be filled with a non-conductor medium. For example, Polycarbonate (PC) filling may be used, although other non-conductive dielectric filling may also be used.
The seventh slit a7 is disposed at the top of the metal rear cover, an extending direction of the seventh slit a7 is parallel to a width direction of the metal rear cover, two ends of the seventh slit a7 are respectively intersected with an edge of the metal rear cover, the eighth slit A8 and the ninth slit a9 are disposed at intervals along the width direction of the metal rear cover, that is, the seventh slit a7 and the eighth slit A8 are disposed at intervals along an X-axis direction of a coordinate system shown in fig. 13, one end of the eighth slit A8 is intersected with the seventh slit a7, the other end of the eighth slit A8 extends to the top edge of the metal rear cover, one end of the ninth slit a9 is intersected with the seventh slit a7, and the other end of the ninth slit a9 extends to the top edge of the metal rear cover. In practical applications, the eighth slot A8 and the ninth slot a9 may be located at the right side of the ninth slot a9 as shown in fig. 13, or alternatively, the position of the eighth slot a9 may be located at the left side of the eighth slot A8.
The tenth slit a10 is disposed at the bottom of the metal rear cover, an extending direction of the tenth slit a10 is parallel to a width direction of the metal rear cover, two ends of the tenth slit a10 are respectively intersected with edges of the metal rear cover, the eleventh slit a11 and the twelfth slit a12 are disposed at intervals along the width direction of the metal rear cover, that is, the eleventh slit a11 and the twelfth slit a12 are disposed at intervals along an X-axis direction of a coordinate system shown in fig. 13, one end of the eleventh slit a11 is intersected with the tenth slit a10, the other end of the eleventh slit a11 extends to the edge of the bottom of the metal rear cover, one end of the twelfth slit a12 is intersected with the tenth slit a10, and the other end of the twelfth slit a12 extends to the edge of the bottom of the metal rear cover. In practical applications, the eleventh slit a11 and the twelfth slit a12 may be located at the left side of the twelfth slit a12 as shown in fig. 13, or may be interchanged, that is, the eleventh slit a11 is located at the twelfth slit a 12.
The first metal unit P1 is a region formed by separating the seventh slit a7 and the eighth slit A8, the second metal unit P2 is a region formed by separating the seventh slit a7, the eighth slit A8 and the ninth slit a9, and the third metal unit P3 is a region formed by separating the seventh slit a7 and the ninth slit a 9. The fourth metal unit P4 is a region partitioned by a tenth slit a10 and an eleventh slit a11, the fifth metal unit P5 is a region partitioned by a tenth slit a10, an eleventh slit a11 and a twelfth slit a12, and the sixth metal unit P6 is a region partitioned by a tenth slit a10 and a twelfth slit a 12. The seventh metal unit P7 is a region formed by separating the seventh slot a7 and the tenth slot a10, a plurality of grounding points (not shown in fig. 13) may be disposed on the seventh slot a7, the plurality of grounding points may be disposed at intervals along an edge of the seventh metal unit P7, and then the seventh metal unit P7 is a reference ground.
The first metal unit P1, the second metal unit P2, and the third metal unit P3 are used to implement the first antenna ANT1, the third metal unit P3 is used to implement the second antenna ANT2, the fourth metal unit P4, the fifth metal unit P5, and the sixth metal unit P6 are used to implement the third antenna ANT3, and the sixth metal unit P6 is used to implement the fourth antenna ANT 4.
The following describes the top structure and the bottom structure of the terminal device provided in this embodiment in detail respectively:
the top structure is as follows:
fig. 14A and 14B illustrate the same coordinate system as fig. 13, and fig. 14A and 14B do not illustrate the coordinate system, where fig. 14A is a schematic diagram of the structure of the top of the terminal device on the XOZ plane, and fig. 14B is a schematic diagram of the structure of the top of the terminal device on the XOY plane.
As shown in fig. 13, 14A and 14B, a first grounding point GND1 is disposed on the first metal unit P1, and the first grounding point GND1 is located on the first metal unit P1 near the edge of the metal rear cover. One end of the first metal element P1 close to the eighth slot a8 is electrically connected to the first feed 102 through the first feed point 101, the first metal element P1 receives an electrical signal input by the first feed 102 through the first feed point 101, the other end of the first metal element P1 is connected to the first ground point GND1 to form a part of the first antenna ANT1, and the first metal element P1 is configured to provide a first resonance in a slot mode.
Optionally, the first metal unit P1 may further include an extended first radiation branch (not shown in fig. 13 and fig. 14A and 14B), where the first radiation branch may be a Flexible Printed Circuit (FPC) or a circuit pattern plated on a bracket of the terminal device by a laser-direct-structuring (LDS) technology, or may also be implemented in other ways, which is not limited by the embodiment of the present application.
In this embodiment, the first feeding point 101 is a connection element between the first metal element P1 and the first feed source 102, the first feeding point 101 may include an elastic component, the elastic component may be made of a stainless steel material or a beryllium copper material, a surface of the elastic component may be plated with nickel and then plated with gold, so as to ensure that the elastic component has good conductivity, and the plating of gold on the surface of the elastic component may also prevent oxidation, and prolong the service life of the elastic component. For example, the elastic member may be a conductive pin made of stainless steel, which may be referred to as a pogo pin, an ejector pin, or other names.
For example, first feed 102 may be a radio frequency module of a terminal device, which is capable of providing an electrical signal to first antenna ANT 1.
Specifically, when the terminal device is placed as shown in fig. 13, when the first feed 102 inputs an electric signal to the first metal element P1, the first metal element P1 can excite an electromagnetic field, radiating an electromagnetic wave to the space, thereby forming a first resonance of a left-hand mode. Wherein the length of the first metal unit may be a quarter of the wavelength of the first resonance.
In practical applications, the length of the first metal unit P1 may be adjusted by adjusting the position of the eighth slit A8 and/or the ninth slit a 9.
Referring to fig. 13, although there is a gap between the first and seventh metal units P1 and P7, in practical applications, the length of the gap may be adjusted by adjusting the position of the first ground point GND1 so that the resonance formed by the gap is away from the target communication frequency. For example, when the position of the first ground point GND1 is moved in the positive X-axis direction, the length of the gap between the first metal unit P1 and the seventh metal unit P7 increases, and the frequency of the resonance formed by the gap increases; alternatively, when the position of the first ground point GND1 is moved in the X-axis negative direction, the length of the gap between the first metal unit P1 and the seventh metal unit P7 is decreased, and the frequency of the resonance formed by the gap is decreased, and when the first ground point GND1 is moved in the X-axis positive direction or in the X-axis negative direction, the frequency of the resonance formed by the gap is different from the frequency of the first resonance when the first metal unit P1 is only required to provide the first resonance. For example, the frequency of the first resonance includes 1710MHz-1880MHz, and the frequency of the resonance formed by the gap between the first metal unit P1 and the seventh metal unit P7 may be less than 1710MHz, or greater than 1880 MHz.
The second metal unit P2 is located between the seventh slot a7, the eighth slot A8 and the ninth slot a9, the seventh slot a7, the eighth slot A8 and the ninth slot a9 are filled with non-conductor media, the second metal unit P2 is suspended over the printed circuit board, so as to form a part of the first antenna ANT1, and the second metal unit P2 is configured to provide a second resonance in a current loop mode because the second metal unit P2 is suspended.
Specifically, when the first feed 102 inputs an electrical signal to the first metal cell P1, the second metal cell P2 can form a second resonance of a current loop mode through coupling, wherein the length of the second metal cell P2 may be one-half of the wavelength of the second resonance. In practical applications, the length of the second metal unit P2 may be adjusted by adjusting the position of the eighth slit A8 and/or the ninth slit a9, and the frequency of the second resonance may be adjusted by adjusting the length of the second metal unit P2.
The third metal unit P3 is provided with a third ground point GND3, the third ground point GND3 is located at a position close to the side edge of the metal rear cover of the third metal unit P3, when the first feed 102 inputs an electric signal to the first metal unit P1, the third metal unit P3 is used to form a part of the first antenna ANT1, and the third metal unit P3 forms a third resonance of a slot mode by coupling. Specifically, the first radiation slot between the third metal unit P3 and the seventh metal unit P7 can excite the radio frequency electromagnetic field, radiating electromagnetic waves to the space. Wherein the length of the first radiation slot may be one half of the wavelength of the third resonance.
In practical applications, the length of the first radiation gap may be adjusted by adjusting the position of the ninth gap a9, and the frequency of the third resonance may be adjusted by adjusting the length of the first radiation gap.
Optionally, the third metal unit P3 may further include an extended second radiation branch (not shown in the figure), which may be an FPC or a circuit pattern plated on a support through an LDS, or may also be implemented in other ways, which is not limited by the embodiment of the present application.
In this embodiment, the superimposed frequency of the first resonance, the second resonance, and the third resonance includes a first communication frequency, for example, the first communication frequency includes 1710-; if the first antenna is set as the main set antenna of the terminal device, the first communication frequency may be used to implement the medium-high frequency of the main set antenna of the terminal device.
For the antenna at the top of the terminal device, compared with the case where the area of the radiator for implementing the first communication frequency in the scheme in the prior art shown in fig. 1C includes a part of the metal rear cover that is blocked, in this embodiment of the present application, the radiator for implementing the first communication frequency includes the metal rear cover that is blocked by the seventh slot and on the entire top side, because the area of the radiator for implementing the first communication frequency is large, the spatial radiation intensity of the first antenna at the first communication frequency is relatively uniform and there is no obvious zero point, by using the implementation manner shown in this embodiment, on the basis of ensuring the OTA performance of the first communication frequency of the antenna at the top, the SAR of the antenna at the first communication frequency is relatively low in the head mode or the head-hand mode, and the antenna at the top of the terminal device can meet the SAR-related standards without returning input power.
Alternatively, if one or more of the first resonance, the second resonance, and the third resonance are wide in bandwidth, when the first communication frequency includes not only 1710MHz to 2690MHz but also 1575.42MHz, that is, the first communication frequency can also cover the GPS L1 band, the first antenna ANT1 may also be set as a GPS antenna.
As shown in fig. 13 and 14B, optionally, the first antenna ANT1 further includes: a first matching circuit 103. Specifically, the first metal element P1 is connected to one end of the first matching circuit 103 through the first feeding point 101, and the other end of the first matching circuit 103 is connected to the first feed 102.
For example, the first matching circuit 103 may include a capacitance to ground or a series inductance or a series capacitance or a parallel inductance, or a capacitance to ground and a series inductance, or a capacitance to series and a parallel inductance. When the first matching circuit 103 includes a grounded capacitor, the first metal element P1 is connected to one end of the capacitor and the first feed 102 through the first feed point 101, respectively, and the other end of the capacitor is grounded; when the first matching circuit 103 includes an inductor in series, the first metal element P1 is connected to one end of the inductor in series through the first feeding point 101, and the other end of the inductor in series is connected to the first feed 102; when the first matching circuit 103 includes capacitors connected in series, the first metal unit P1 is connected to one end of the capacitors connected in series through the first feeding point 101, and the other end of the capacitor is connected to the first feed 102; when the first matching circuit 103 comprises inductors connected in parallel, one end of the inductor and the first feed source 102 are respectively connected to the first metal unit P1 through the first feed point 101, and the other end of the inductor is grounded; when the first matching circuit 103 comprises a grounded capacitor and a series inductor, the first metal element P1 is connected to one end of the series inductor through the first feeding point 101, the other end of the series inductor is connected to one end of the capacitor and the first feed 102, respectively, and the other end of the capacitor is grounded; or, the first metal element P1 is connected to one end of a capacitor and one end of a series inductor through a first feeding point 101, respectively, the other end of the capacitor is grounded, and the other end of the series inductor is connected to the first feed 102; when the first matching circuit 103 includes a capacitor and an inductor connected in series and in parallel, the first metal element P1 is connected to one end of the capacitor through the first feeding point 101, the other end of the capacitor is connected to one end of the inductor and the second feeding point 102 respectively, and the other end of the inductor is grounded, or the first metal element P1 is connected to one end of the inductor and one end of the capacitor through the first feeding point 101 respectively, the other end of the inductor is grounded, and the other end of the capacitor is connected to the first feeding point 101. In practical applications, the first matching circuit 103 may include one or more of a capacitor connected to ground, a series inductor, a series capacitor, or a parallel inductor, and if there are a plurality of capacitors, the connection sequence may be set according to practical requirements, and is not limited to the above-described manner.
The first matching circuit 103 can adjust the impedance of the first resonance, so that the return loss value of the first resonance is smaller, and the OTA performance is higher when the first antenna ANT1 operates at the first resonance.
Alternatively, one end of the third metal element P3 near the ninth slot a9 is connected to the second feeding point 201, the third metal element P3 receives an electrical signal input by the second feed 202 through the second feeding point 201, one end of the third metal element P3 near the lateral edge of the metal back cover is connected to the second ground point GND2, the third metal element P3, the second feeding point 201, and the second feed 202 form a part of the second antenna ANT2, and the second antenna ANT2 is configured to provide a seventh resonance in a left-hand mode.
The specific structure of the second feeding point 201 may refer to the detailed description of the first feeding point 101, and the specific structure of the second feed 202 may refer to the detailed description of the first feed 102, which are not described herein again.
Specifically, when the second feed 202 inputs an electrical signal to the third metallic element P3, the third metallic element P3 can excite a radio frequency electromagnetic field, radiate electromagnetic waves into space, and form a seventh resonance of a left-hand mode, and the length of the third metallic element P3 may be a quarter of the wavelength of the seventh resonance.
In practical applications, the third metal unit P3 may further include an extended second radiation branch, which may be an FPC or a circuit pattern plated on a support through an LDS, or may be implemented in other ways, and the embodiment of the present application is not limited thereto.
The frequency of the seventh resonance includes: a second communication frequency. Wherein the second communication frequency is different from the first communication frequency in frequency range. Illustratively, when the first communication frequency includes 1710MHz-2690MHz, and the second communication frequency includes 1176.45MHz, then the second communication frequency covers the GPS L5 band, then the first antenna ANT1 may be set as a main set antenna or a diversity antenna, and the second antenna ANT2 may be set as a GPS antenna.
As shown in fig. 13 and 14B, optionally, the second antenna ANT2 further includes: the second matching circuit 203, the second matching circuit 203 may comprise a capacitor connected to ground or a series inductor or a series capacitor or a parallel inductor, or a capacitor connected to ground and a series inductor, or a capacitor connected in series and a parallel inductor. When the second matching circuit 203 comprises a grounded capacitor, the third metal element P3 is respectively connected with one end of the capacitor and the second feed 202 through the second feed point 201, and the other end of the capacitor is grounded; when the second matching circuit 203 comprises an inductor connected in series, the third metal element P3 is connected to one end of the inductor connected in series through the second feeding point 201, and the other end of the inductor connected in series is connected to the second feed 202; when the second matching circuit 203 comprises a capacitor connected in series, the third metal element P3 is connected to one end of the capacitor connected in series through the second feeding point 201, and the other end of the capacitor is connected to the second feed 202; when the second matching circuit 203 comprises inductors connected in parallel, the third metal unit P3 is respectively connected with one end of the inductor and the second feed source 202 through the second feed point 201, and the other end of the inductor is grounded; when the second matching circuit 203 comprises a grounded capacitor and a serially connected inductor, the third metal unit P3 is connected to one end of the serially connected inductor through the second feeding point 201, the other end of the serially connected inductor is connected to one end of the capacitor and the second feed 202, respectively, and the other end of the capacitor is grounded; or the third metal element P3 is connected to one end of a capacitor and one end of a series inductor through a second feeding point 201, respectively, the other end of the capacitor is grounded, and the other end of the series inductor is connected to the second feed 202; when the second matching circuit 203 comprises a capacitor and an inductor connected in parallel in series, the third metal unit P3 is connected to one end of the capacitor through the second feeding point 201, the other end of the capacitor is connected to one end of the inductor and the second feed 102 respectively, and the other end of the inductor is grounded, or the third metal unit P3 is connected to one end of the inductor and one end of the capacitor through the second feeding point 201, the other end of the inductor is grounded, and the other end of the capacitor is connected to the first feed 101. In practical applications, the second matching circuit 203 may include one or more of a grounded capacitor, a series inductor, a series capacitor, or a parallel inductor, and if there are multiple capacitors, the connection order thereof may be set according to practical requirements, and is not limited to the above-described manner.
The second matching circuit 203 can adjust the impedance of the seventh resonance, so that the return loss value of the seventh resonance is smaller, and the OTA performance is higher when the second antenna ANT2 operates at the seventh resonance.
The structure of the bottom:
fig. 14C and 14D illustrate the same coordinate system as that employed in fig. 13, and fig. 14C and 14D do not illustrate the coordinate system, where fig. 14C is a schematic diagram of the structure of the bottom of the terminal device on the XOZ plane, and fig. 14D is a schematic diagram of the structure of the bottom of the terminal device on the XOY plane.
As shown in fig. 13, 14C and 14D, a third ground point GND3 is disposed on the fourth metal unit P4, and the third ground point GND3 is located on the fourth metal unit P4 near the edge of the metal rear cover. One end of the fourth metal element P4 near the tenth slot a10 is connected to the third feed 302 through the third feed point 301, the fourth metal element P4 receives an electrical signal input by the third feed 302 through the third feed point 301, the other end of the fourth metal element P4 is connected to the third ground point GND3 to form a part of the third antenna ANT3, and the fourth metal element P4 is configured to provide a fourth resonance in a left-hand mode.
Optionally, the fourth metal unit P4 may further include an extended third radiation branch (not shown in fig. 13, 14C, and 14D), which may be an FPC or a circuit pattern plated on a support through an LDS, or may also be implemented in other ways, which is not limited by the embodiment of the present application.
The specific structure of the third feeding point 301 may refer to the detailed description of the first feeding point 101, and the specific structure of the third feed 302 may refer to the detailed description of the first feed 102, which are not described herein again.
Specifically, when the third feed 302 inputs an electrical signal to the fourth metal element P4, the fourth metal element P4 can excite a radio frequency electromagnetic field and radiate an electromagnetic wave to the space, so as to form a fourth resonance of a left-hand mode, wherein the length of the fourth metal element P4 may be a quarter of the wavelength of the fourth resonance.
In practical applications, the length of the fourth metal unit P4 may be adjusted by adjusting the position of the eleventh slit a11 and/or the twelfth slit a12, and the frequency of the fourth resonance may be adjusted by adjusting the length of the fourth metal unit P4.
Referring to fig. 13, although a gap exists between the fourth metal unit P4 and the seventh metal unit P7, in practical applications, the length of the gap may be adjusted by adjusting the position of the third ground point GND3, so that the resonance formed by the gap is far from the target communication frequency. For example, moving the position of the third ground point GND3 in the positive X-axis direction, the length of the gap between the third and seventh metal units P3 and P7 increases, and the frequency of the resonance formed by the gap decreases; when the position of the third ground point GND3 is moved in the X-axis negative direction, the length of the gap between the third metal element P3 and the seventh metal element P7 decreases, the frequency of the resonance formed by the gap increases, and when the third antenna ANT3 is only required to provide the fourth resonance, the frequency of the resonance formed by the gap may be moved away from the frequency of the fourth resonance regardless of whether the gap is moved in the X-axis positive direction or the X-axis negative direction. For example, the frequency of the fourth resonance includes 2300MHz-2690MHz, the frequency of the resonance formed by the gap between the fourth metal unit P4 and the seventh metal unit P7 may be less than 2300MHz, or more than 2690 MHz.
The fifth metal unit P5 is located between the tenth slot a10, the eleventh slot a11 and the twelfth slot a12, the tenth slot a10, the eleventh slot a11 and the twelfth slot a12 are filled with non-conductor media, the fifth metal unit P5 is suspended right above the printed circuit board, so as to form a part of the third antenna ANT3, and because the fifth metal unit P5 is suspended, the fifth metal unit P5 is used for providing a fifth resonance in a current loop mode.
Specifically, when the third feed 302 inputs an electrical signal to the fourth metal unit P4, the fifth metal unit P5 forms a fifth resonance of a current loop mode through coupling, wherein the length of the fifth metal unit P5 may be one-half of the wavelength of the fifth resonance
In practical applications, the length of the fifth metal unit P5 may be adjusted by adjusting the position of the eleventh slit a11 and/or the twelfth slit a12, and the frequency of the fifth resonance may be adjusted by adjusting the length of the fifth metal unit P5.
As shown in fig. 13, 14C and 14D, a fourth grounding point GND4 is disposed on the sixth metal unit P6, the fourth grounding point GND4 is located on the sixth metal unit P6 and near the edge of the side edge of the metal rear cover, when the third feed 302 inputs an electrical signal to the fourth metal unit P4, the sixth metal unit P6 is configured to form a part of the third antenna ANT3, and the sixth metal unit P6 is configured to provide a sixth resonance in a slot mode.
Specifically, the second radiation gap between the sixth metal element P6 and the seventh metal element P7 can excite the radio frequency electromagnetic field, radiating electromagnetic waves to the space. Wherein the length of the second radiation slot may be one half of the wavelength of the sixth resonance.
In practical applications, the length of the second radiation slot may be adjusted by adjusting the position of the twelfth slot a12, and the frequency of the sixth resonance may be adjusted by adjusting the length of the second radiation slot.
Optionally, the sixth metal unit P6 may further include an extended fourth radiation branch (not shown in the figure), and the third radiation branch may be an FPC or a circuit pattern plated on a support through an LDS, or may also be implemented in other ways, which is not limited by the embodiment of the present application.
In this embodiment, the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes a first communication frequency, for example, the first communication frequency includes 1710-2690MHz, if the antenna on the top of the terminal device is set as a diversity antenna, the antenna on the bottom of the terminal device may be set as a main set antenna, the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance may be used to implement a medium-high frequency of the main set antenna, if the antenna on the top of the terminal device is set as the main set antenna, the bottom antenna of the terminal device may be set as a diversity antenna, and the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance is used to implement a medium-high frequency of the diversity antenna.
For the antenna at the bottom of the terminal device, compared with the case where the area of the radiator for implementing the first communication frequency in the scheme in the prior art shown in fig. 1C includes a part of the metal rear cover that is separated, in this embodiment of the present application, the radiator for implementing the first communication frequency includes the metal rear cover that is separated by the tenth slot on the entire bottom side, and because the area of the radiator for implementing the first communication frequency is large, the spatial radiation intensity of the antenna at the bottom of the terminal device at the first communication frequency is relatively uniform and has no obvious zero point, by using the implementation manner shown in this embodiment, on the basis of ensuring the OTA performance of the first communication frequency of the antenna at the bottom of the terminal device, the body dy is relatively low, and the SAR-related standard can be satisfied without backspacing input power.
Alternatively, if the third antenna ANT3 is set as a diversity antenna of the terminal device, and the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes not only 1710MHz to 2690MHz but also 1575.42MHz, that is, the first communication frequency can also cover the GPS L1 band, the third antenna ANT3 may also be set as a GPS antenna.
As shown in fig. 13, 14C and 14D, optionally, the third antenna ANT3 further includes: a third matching circuit 303. Specifically, the fourth metal element P4 is connected to one end of the third matching circuit 303 through the third feeding point 301, and the other end of the third matching circuit 103 is connected to the third feed 302.
For example, the third matching circuit 303 may include a capacitance to ground or a series inductance or a series capacitance or a parallel inductance, or a capacitance to ground and a series inductance, or a capacitance to series and a parallel inductance. When the third matching circuit 303 includes a grounded capacitor, the fourth metal element P4 is respectively connected to one end of the capacitor and the third feed 302 through the third feed point 301, and the other end of the capacitor is grounded; when the third matching circuit 303 includes an inductor connected in series, the fourth metal element P4 is connected to one end of the inductor connected in series through the third feeding point 301, and the other end of the inductor connected in series is connected to the third feeding source 302; when the third matching circuit 303 includes capacitors connected in series, the fourth metal unit P4 is connected to one end of the capacitors connected in series through the third feeding point 301, and the other end of the capacitor is connected to the third feed 302; when the third matching circuit 303 includes inductors connected in parallel, the fourth metal unit P4 is connected to one end of the inductor and the third feed 302 through the third feed point 301, respectively, and the other end of the inductor is grounded; when the third matching circuit 303 includes a grounded capacitor and a serially connected inductor, the fourth metal element P4 is connected to one end of the serially connected inductor through the third feeding point 301, the other end of the serially connected inductor is connected to one end of the capacitor and the third feed source 302, respectively, and the other end of the capacitor is grounded; or, the fourth metal element P4 is connected to one end of a capacitor and one end of a series inductor through the third feeding point 301, respectively, the other end of the capacitor is grounded, and the other end of the series inductor is connected to the third feed source 302; when the third matching circuit 303 includes a capacitor and an inductor connected in parallel in series, the fourth metal element P4 is connected to one end of the capacitor through the third feeding point 301, and the other end of the capacitor is connected to one end of the inductor and the third feed 302 respectively, and the other end of the inductor is grounded, or the fourth metal element P4 is connected to one end of the inductor and one end of the capacitor through the third feeding point 301 respectively, and the other end of the inductor is grounded, and the other end of the capacitor is connected to the first feed 101. In practical applications, the third matching circuit 303 may include one or more of a capacitor connected to ground, a series inductor, a series capacitor, or a parallel inductor, and if there are a plurality of capacitors, the connection sequence may be set according to practical requirements, and is not limited to the above-described manner.
The third matching circuit 303 can adjust the impedance of the fourth resonance, so that the return loss value of the fourth resonance is smaller, and the OTA performance is higher when the third antenna ANT3 works at the fourth resonance.
Alternatively, one end of the sixth metal element P6 near the twelfth slot a12 is connected to the fourth feeding point 401, the sixth metal element P6 receives an electrical signal input by the fourth feed 402 through the fourth feeding point 401, one end of the sixth metal element P6 near the lateral edge of the metal back cover is connected to the fourth ground point GND4, the sixth metal element P6, the fourth feed 401 and the fourth feed 402 form a part of a fourth antenna ANT4, and the fourth antenna ANT4 is configured to provide an eighth resonance in a left-hand mode.
The specific structure of the fourth feeding point 401 may refer to the detailed description of the first feeding point 101, and the specific structure of the fourth feeding point 402 may refer to the detailed description of the first feeding point 102, which are not described herein again.
As shown in fig. 13, 14C and 14D, optionally, the fourth antenna ANT4 further includes: a fourth matching circuit 403. Specifically, the sixth metal element P6 is connected to one end of the fourth matching circuit 403 through the fourth feeding point 401, and the other end of the third matching circuit 103 is connected to the fourth feed 402.
For example, the fourth matching circuit 403 may include a capacitance to ground or a series inductance or a series capacitance or a parallel inductance, or a capacitance to ground and a series inductance, or a capacitance to series and a parallel inductance. When the fourth matching circuit 403 includes a grounded capacitor, the sixth metal element P6 is respectively connected to one end of the capacitor and the fourth feed 402 through the fourth feed point 401, and the other end of the capacitor is grounded; when the fourth matching circuit 403 includes an inductor connected in series, the sixth metal element P6 is connected to one end of the inductor connected in series through the fourth feeding point 401, and the other end of the inductor connected in series is connected to the fourth feed 402; when the fourth matching circuit 403 includes capacitors connected in series, the sixth metal unit P6 is connected to one end of the capacitors connected in series through the fourth feeding point 401, and the other end of the capacitor is connected to the fourth feed 402; when the fourth matching circuit 403 includes inductors connected in parallel, the sixth metal element P6 is connected to one end of the inductor and the fourth feed 402 through the fourth feed point 401, respectively, and the other end of the inductor is grounded; when the fourth matching circuit 403 includes a grounded capacitor and a serially connected inductor, the sixth metal element P6 is connected to one end of the serially connected inductor through the fourth feeding point 401, the other end of the serially connected inductor is connected to one end of the capacitor and the fourth feed 402, respectively, and the other end of the capacitor is grounded; or, the sixth metal element P6 is connected to one end of a capacitor and one end of a series inductor through the fourth feeding point 401, respectively, the other end of the capacitor is grounded, and the other end of the series inductor is connected to the fourth feed 402; when the fourth matching circuit 403 includes a capacitor and an inductor connected in parallel in series, the sixth metal element P6 is connected to one end of the capacitor through the fourth feeding point 401, the other end of the capacitor is connected to one end of the inductor and the fourth feed 402 respectively, and the other end of the inductor is grounded, or the sixth metal element P6 is connected to one end of the inductor and one end of the capacitor through the fourth feeding point 401 respectively, the other end of the inductor is grounded, and the other end of the capacitor is connected to the first feed 101. In practical applications, the fourth matching circuit 403 may include one or more of a capacitor connected to ground, or an inductor connected in series, or a capacitor connected in series, or an inductor connected in parallel, and if there are multiple capacitors, the connection order may be set according to practical requirements, and is not limited to the above-described manner.
The fourth matching circuit 403 can adjust the impedance of the eighth resonance, so that the return loss value of the eighth resonance is smaller, and the OTA performance is higher when the fourth antenna ANT4 operates at the eighth resonance.
The terminal device generally has a cellular function, a wifi function, a GPS function, and the like, and accordingly, the terminal device includes a main set antenna, a diversity antenna, and a GPS antenna. As shown in fig. 13, 14A, 14B, 14C, and 14D, the terminal device may set the respective antennas in any one of the following possible manners:
a first possible implementation: setting the first antenna ANT1 as a diversity antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing a first communication frequency of the diversity antenna, the second antenna ANT1 is set as a diversity antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing a second communication frequency of the diversity antenna; the third antenna ANT3 is set as a main set antenna, and specifically, the fourth resonance, the fifth resonance, and the sixth resonance provided by the third antenna ANT3 are used to implement the first communication frequency of the main set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to implement the third communication frequency of the main set antenna. The second communication frequency and the third communication frequency may be the same or different.
In addition, if the superimposed frequency of the first resonance, the second resonance, and the third resonance includes 1575.42MHz, the first antenna ANT1 may be further set as a GPS antenna; if the communication frequency of the diversity antenna does not include the second communication frequency or the superimposed frequency of the first resonance, the second resonance, and the third resonance does not include 1575.42MHz, the second antenna ANT2 may be set as a GPS antenna, and the frequency of the seventh resonance includes 1575.42MHz or 1176.45 MHz.
A second possible implementation: the third antenna ANT3 is set as a diversity antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna ANT3 are used for realizing the first communication frequency of the diversity antenna, the fourth antenna ANT4 is set as a diversity antenna, and the eighth resonance provided by the fourth antenna ANT4 is used for realizing the third communication frequency of the diversity antenna; the first antenna ANT1 is set as a main set antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the main set antenna, the second antenna ANT2 is set as a main set antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing the second communication frequency of the main set antenna.
In addition, if the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes 1575.42MHz, the third antenna ANT3 may be further set as a GPS antenna; if the communication frequency of the diversity antenna does not include the third communication frequency or the superimposed frequency of the fourth resonance, the fifth resonance and the sixth resonance does not include 1575.42MHz, the fourth antenna ANT4 may be set as a GPS antenna, and the frequency of the seventh resonance includes 1575.42MHz or 1176.45 MHz.
Due to the continuous development of wireless communication technology, more and more wireless communication systems need to be supported by terminal equipment, the hardware requirement on the terminal equipment is continuously improved, and especially the requirement on the antenna of the terminal equipment is continuously improved. For example, the low frequencies that the terminal device needs to support include one or more of frequency bands of LTE B12(699MHz-746MHz), LTE B13(746MHz-787MHz), LTE B14(758 MHz-798MHz), LTE B19(830MHz-890MHz), LTE B20(791MHz-862MHz), GSM850 (824MHz-894MHz), GSM900(880MHz-960MHz), WCDMA850(824MHz-894MHz), and WCDMA900(880MHz-960 MHz). On the basis of the above embodiment, in order to enable the terminal device to have better communication performance when adopting different wireless communication systems, and to enable the terminal device to have better communication performance when working at the communication splicing point supported by the terminal device.
Therefore, on the basis of the above embodiment, optionally, as shown in fig. 15A, the first antenna ANT1 further includes: the first antenna adjusting circuit S1, the first antenna adjusting circuit S1 is used to adjust the frequency of the first resonance. The first antenna adjusting circuit S1 may include at least one branch, and each branch is provided with a first antenna switch K1 and a first adjusting matching circuit L1 which are electrically connected. In the present embodiment, first, a case where first antenna ANT1 includes first matching circuit 103 is taken as an example, and a case where first antenna ANT1 does not include first matching circuit 103 is similar to a case where first antenna ANT1 includes first matching circuit 103, with the difference that: the first feeding point 101 is directly connected to the first feed 102 when the first antenna ANT1 does not include the first matching circuit 103, and the first feeding point 101 is connected to one end of the first matching circuit 103 and the other end of the first matching circuit 103 is connected to the first feed 102 when the first antenna ANT1 includes the first matching circuit 103.
The specific structures of the first antenna switch K1 and the first adjustment matching circuit L1 are not limited in this application. For example, the first antenna switch K1 may be a single-pole single-throw switch, or the first antenna adjusting circuit S1 may also include a switch that is a single-pole multiple-throw switch with one input and multiple outputs or a multiple-pole multiple-throw switch with multiple inputs and multiple outputs, which is not limited in this application. Any one switch may be connected by one or more switches connected in series and/or in parallel, which is not limited in this application. The first adjusting matching circuit L1 may be a capacitor, an inductor, or a plurality of capacitors connected in series, or a plurality of inductors connected in series, or a plurality of capacitors connected in parallel, or a plurality of inductors connected in parallel, or at least one capacitor and at least one inductor connected in series, or at least one group of capacitors and inductors connected in series, which is not limited in this application.
In this embodiment, referring to fig. 15A, in a possible connection manner, the first metal element P1 may be connected to one end of the first antenna adjusting circuit S1 through the first feeding point 101, the other end of the first antenna adjusting circuit S1 is grounded, the first metal element P1 is further connected to one end of the first matching circuit 103 through the first feeding point 101, and the other end of the first matching circuit 103 is connected to the first feed 102.
Referring to fig. 15B, in another possible connection manner, the first metal element P1 is connected to one end of the first matching circuit 103 through the first feeding point 101, the other end of the first matching circuit 103 is connected to the first feeding source 102, the first metal element P1 is connected to one end of the first antenna adjusting circuit S1 through a first connection point (not shown in fig. 15B), and the other end of the first antenna adjusting circuit S1 is grounded.
As for the connection sequence of the first antenna switch K1 and the first adjusting matching circuit L1 and the specific connection relationship of the first antenna adjusting circuit S1, reference may be made to fig. 6C, 6D and 6E, which are not repeated herein.
In this embodiment of the application, the number of branches included in the first antenna adjustment circuit S1 may be set according to practical situations, and the application does not limit this. Illustratively, the number of branches included in the first antenna adjustment circuit S1 may be determined by:
for example, when the first antenna adjusting circuit S1 is in the off state, the frequency of the first resonance includes 1710MHz to 1880MHz, the communication frequency band of the first antenna ANT1 includes 1850MHz to 1990MHz in addition to 1710MHz to 1880MHz, the first antenna adjusting circuit S1 may include a branch, and the frequency of the first resonance when the branch is in the on state includes 1850MHz to 1990MHz, and the first antenna ANT1 may also operate in the 1850MHz to 1990MHz band. For another example, when the first antenna adjusting circuit S1 is in the off state, the frequency of the first resonance includes 1710MHz to 1880MHz, the communication frequency band of the first antenna ANT1 includes two frequency bands of 1850MHz to 1990MHz and 1920MHz to 2170MHz in addition to 1710MHz to 1880MHz, the first antenna ANT1 may include two branches, where when one branch is in the on state, the frequency of the first resonance includes 1850MHz to 1990MHz, the first antenna ANT1 may also operate in the frequency band of 1850MHz to 1990MHz, and when the other branch is in the on state, the frequency of the first resonance includes 1920MHz to 2170MHz, and the first antenna ANT1 may also operate in the frequency band of 1850MHz to 1990 MHz.
In this embodiment, by adding the first antenna adjusting circuit S1 to the first antenna ANT1, the first antenna adjusting circuit S1 may adjust the frequency of the first resonance when the first antenna ANT1 cannot meet the communication frequency band of the terminal device, so as to meet the diversified communication frequency bands of the terminal device.
Optionally, the second antenna ANT2 further includes: the second antenna adjusting circuit S2, the second antenna adjusting circuit S2 is for adjusting the frequency of the seventh resonance. The second antenna adjusting circuit S2 may include at least one branch, and each branch is provided with a second antenna switch K2 and a second adjusting matching circuit L2 which are electrically connected.
For specific contents of the second antenna switch K2, reference may be made to the description of the first antenna switch K1, which is not described herein again. For the details of the second adjustment matching circuit L2, reference may be made to the description of the first adjustment matching circuit L1, and details are not repeated here.
In this embodiment, referring to fig. 15A, in one possible connection manner, the third metal element P3 may be connected to one end of the second antenna adjusting circuit S2 and one end of the second matching circuit 203 through the second feeding point 201, where the other end of the second antenna adjusting circuit S2 is grounded, and the other end of the second matching circuit 203 is connected to the second feed 202.
Referring to fig. 15B, in another possible connection manner, the third metal element P3 is connected to one end of the second matching circuit 203 through the second feeding point 201, the other end of the second matching circuit 203 is connected to the second feed 202, the third metal element P3 is connected to one end of the second antenna adjusting circuit S2 through a second connection point (not shown in fig. 15B), and the other end of the second antenna adjusting circuit S2 is grounded.
In addition, in the connection relationship between the second feeding point 201, the second antenna ANT2 switch, and the second adjusting matching circuit L2 in this embodiment, the description of the connection relationship between the first feeding point 101, the first antenna switch K1, and the first adjusting matching circuit L1 may be referred to, and is not repeated here.
The number of branches included in the second antenna adjustment circuit S2 may be set according to practical situations, which is not limited in this application. For example, when the second antenna adjusting circuit S2 is in the off state, the frequency of the seventh resonance includes 880MHz to 960MHz, and the communication frequency band of the second antenna ANT2 includes a frequency band of 824MHz to 896MHz in addition to 880MHz to 960MHz, the second antenna adjusting circuit S2 may include a branch, and when the branch is in the on state, the frequency of the seventh resonance includes 824MHz to 896MHz, the second antenna ANT2 may also operate in the frequency band of 824MHz to 896 MHz. For another example, when the second antenna adjusting circuit S2 is in the off state, the frequency of the seventh resonance includes 880MHz to 960MHz, and the communication band of the second antenna ANT2 includes two frequency bands of 824MHz to 894MHz and 791MHz to 862MHz besides 880MHz to 960MHz, the second antenna adjusting circuit S2 may include two branches, where when one branch is in the on state, the frequency of the seventh resonance includes 824MHz to 894MHz, the second antenna ANT2 may further operate in 824MHz to 894MHz, and when the other branch is in the on state, the frequency of the seventh resonance includes 791MHz to 862MHz, the second antenna ANT2 may further operate in 791MHz to 862 MHz.
Optionally, the third antenna ANT3 further includes: the third antenna adjusting circuit S3 and the third antenna adjusting circuit S3 are used to adjust the frequency of the fourth resonance. The third antenna adjusting circuit S3 may include at least one branch, and each branch is provided with a third antenna switch K3 and a third adjusting matching circuit L3, which are electrically connected.
For details of the third antenna switch K3, reference may be made to the description of the first antenna switch K1, which is not described herein again. For details of the third adjustment matching circuit L3, reference may be made to the description of the first adjustment matching circuit L1, and details thereof are not repeated here.
Referring to fig. 15C, in a possible connection manner, the fourth metal element P4 may be connected to one end of the third antenna adjusting circuit S3 and one end of the third matching circuit 303 through the third feeding point 301, the other end of the third antenna adjusting circuit S3 is grounded, and the other end of the third matching circuit 303 is connected to the third feed 302.
Referring to fig. 15D, in another possible connection manner, the fourth metal element P4 is connected to one end of the third matching circuit 303 through the third feeding point 301, the other end of the third matching circuit 303 is connected to the third feed 302, the fourth metal element P4 is connected to one end of the third antenna adjusting circuit S3 through a third connection point (not shown in fig. 15D), and the other end of the third antenna adjusting circuit S3 is grounded.
In addition, in this embodiment, for the connection relationship among the third feeding point 301, the third antenna switch K3 and the third adjusting and matching circuit L3, reference may be made to the description of the connection relationship among the first feeding point 101, the first antenna switch K1 and the first adjusting and matching circuit L1, and details are not repeated here.
The third antenna adjusting circuit S3 works in a manner similar to that of the first antenna adjusting circuit S1 and the second antenna adjusting circuit S2, and reference may be made to the detailed description of the first antenna adjusting circuit S1 and the second antenna adjusting circuit S2, which is not repeated herein.
Optionally, the fourth antenna ANT4 further includes: the fourth antenna adjusting circuit S4 and the fourth antenna adjusting circuit S4 are used to adjust the frequency of the eighth resonance. The fourth antenna adjusting circuit S4 may include at least one branch, and each branch is provided with a fourth antenna switch K4 and a fourth adjusting matching circuit L4, which are electrically connected.
For details of the fourth antenna switch K4, reference may be made to the description of the first antenna switch K1, which is not described herein again. For details of the fourth adjustment matching circuit L4, reference may be made to the description of the first adjustment matching circuit L1, and details thereof are not repeated here.
Referring to fig. 15C, in another possible connection manner, the sixth metal element P6 is connected to one end of the fourth antenna adjusting circuit S4 and one end of the fourth matching circuit 403 through the fourth feeding point 401, the other end of the fourth antenna adjusting circuit S4 is grounded, and the other end of the fourth matching circuit 403 is connected to the fourth feed 402.
Referring to fig. 15D, in another possible connection manner, the sixth metal element P6 is connected to one end of the fourth matching circuit 403 through the fourth feeding point 401, the other end of the fourth matching circuit 403 is connected to the fourth feed 402, the sixth metal element P6 is connected to one end of the fourth antenna adjusting circuit S4 through a fourth connection point (not shown in fig. 15D), and the other end of the fourth antenna adjusting circuit S4 is grounded.
In addition, for the connection relationship among the fourth feeding point 401, the fourth antenna switch K4 and the fourth adjusting matching circuit L4, reference may be made to the description of the connection relationship among the first feeding point 101, the first antenna switch K1 and the first adjusting matching circuit L1, and details are not repeated here.
The fourth antenna adjusting circuit S4 operates in a manner similar to that of the first antenna adjusting circuit S1 and the second antenna adjusting circuit S2, and reference may be made to the detailed description of the first antenna adjusting circuit S1 and the second antenna adjusting circuit S2, which is not repeated herein.
In this embodiment, by adding a corresponding antenna adjusting circuit to one or more of the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4, the requirement for the resonance bandwidth of the antenna can be reduced, and the diversified communication frequency bands of the terminal device can be satisfied.
EXAMPLE seven
Fig. 16 is a schematic structural diagram of a terminal device according to another embodiment of the present application; fig. 17A is a schematic structural diagram of a fifth antenna of a terminal device according to an embodiment of the present application; fig. 17B is a schematic structural diagram of a fifth antenna of a terminal device according to another embodiment of the present application; fig. 17C is a schematic structural diagram of a sixth antenna of a terminal device according to an embodiment of the present application; fig. 17D is a schematic structural diagram of a sixth antenna of a terminal device according to another embodiment of the present application.
In this embodiment, fig. 16 is a schematic diagram of a back side of the terminal device, an origin in a coordinate system adopted in fig. 16 is a geometric center point of the terminal device, a Z-axis direction is a direction from a front side of the terminal device to the back side of the terminal device, a Y-axis direction is a direction from a bottom side of the terminal device to a top side of the terminal device, an X-axis is a direction from left to right along a metal frame of the terminal device, and the X-axis is perpendicular to the Y-axis and the Z-axis respectively. In the present embodiment, this coordinate system is shown only in fig. 16.
It should be noted that the coordinate system adopted in fig. 17A to 17D is the same as the coordinate system adopted in fig. 16, and none of fig. 17A to 17D shows the coordinate system, where fig. 17A and 17C are partial screenshots of the YOZ plane of the terminal device, and fig. 17B and 17D are top views of the terminal device along the XOY plane.
In practical application, the terminal device usually has multiple wireless communication functions such as cellular, wifi, bluetooth and GPS, and accordingly, the terminal device usually includes a main antenna, a diversity antenna, a wifi antenna, a bluetooth antenna and a GPS antenna. With the solution in the above embodiment, each antenna may be set through several possible implementations:
a first possible implementation: setting the first antenna ANT1 as a diversity antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 being used to implement the first communication frequency of the diversity antenna, the second antenna ANT2 being set as a diversity antenna, the seventh resonance provided by the second antenna ANT2 being used to implement the second communication frequency of the diversity antenna; the third antenna ANT3 is set as a main set antenna, and specifically, the fourth resonance, the fifth resonance, and the sixth resonance provided by the third antenna ANT3 are used to implement the first communication frequency of the main set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to implement the third communication frequency of the main set antenna. The second communication frequency and the third communication frequency may be the same or different.
In addition, if the superimposed frequency of the first resonance, the second resonance, and the third resonance includes 1575.42MHz, the first antenna ANT1 may be further set as a GPS antenna; if the communication frequency of the diversity antenna does not include the second communication frequency or the superimposed frequency of the first resonance, the second resonance, and the third resonance does not include 1575.42MHz, the second antenna ANT2 may be set as a GPS antenna, and the frequency of the seventh resonance includes 1575.42MHz or 1176.45 MHz.
A second possible implementation: the third antenna ANT3 is set as a diversity antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna ANT3 are used for realizing the first communication frequency of the diversity antenna, the fourth antenna ANT4 is set as a diversity antenna, and the eighth resonance provided by the fourth antenna ANT4 is used for realizing the third communication frequency of the diversity antenna; the first antenna ANT1 is set as a main set antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the main set antenna, the second antenna ANT2 is set as a main set antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing the second communication frequency of the main set antenna.
In addition, if the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes 1575.42MHz, the third antenna ANT3 may be further set as a GPS antenna; if the communication frequency of the diversity antenna does not include the third communication frequency or the superimposed frequency of the fourth resonance, the fifth resonance and the sixth resonance does not include 1575.42MHz, the fourth antenna ANT4 may be set as a GPS antenna, and the frequency of the seventh resonance includes 1575.42MHz or 1176.45 MHz.
A third possible implementation: the first antenna ANT1 is set as a diversity antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the diversity antenna, and if the superposed frequency of the first resonance, the second resonance and the third resonance comprises 2400MHz-2500MHz, the first antenna ANT1 can be set as a wifi antenna, or a wifi antenna and a bluetooth antenna; the second antenna ANT2 is set as a GPS antenna, and the frequency of the seventh resonance provided by the second antenna ANT2 includes 1176.45MHz or 1575.42 MHz; the third antenna ANT3 is set as a master set antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna are used for realizing the first communication frequency of the master set antenna, the fourth antenna ANT4 is set as the master set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used for realizing the third communication frequency of the master set antenna.
In addition, if the frequency of the superimposed first resonance, second resonance and third resonance includes 1575.42MHz, the first antenna ANT1 may be further configured as a GPS antenna, and accordingly, the frequency of the seventh resonance provided by the second antenna ANT2 includes 1176.45 MHz.
A fourth possible implementation: the first antenna ANT1 is set as a main set antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the main set antenna, the second antenna ANT2 is set as the main set antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing the second communication frequency of the main set antenna; the third antenna ANT3 is set as a diversity antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna ANT3 are used for realizing the first communication frequency of the diversity antenna, and if the frequency obtained by superposing the fourth resonance, the fifth resonance and the sixth resonance includes 2400MHz-2500MHz, the third antenna ANT3 can be set as a wifi antenna, or a wifi antenna and a bluetooth antenna; the fourth antenna ANT4 is provided as a GPS antenna, and the frequency of the eighth resonance provided by the fourth antenna ANT4 includes 1176.45MHz or 1575.42 MHz.
In addition, if the superimposed frequency of the fourth resonance, the fifth resonance and the sixth resonance includes 1575.42MHz, the third antenna ANT3 may be further configured as a GPS antenna, and accordingly, the frequency of the eighth resonance provided by the fourth antenna ANT4 includes 1176.45 MHz.
On the basis of the above-mentioned multiple possible implementation manners, this embodiment provides a terminal device, which ensures OTA performance of the top antenna and the bottom antenna, and can also satisfy diversified wireless communication frequency bands of the terminal device on the basis that the SAR of the head mode and the head-hand mode of the top antenna and the SAR of the body SAR of the bottom antenna are lower.
In addition to the above embodiments, referring to fig. 16, a thirteenth slit a13 is further provided on the metal rear cover. Specifically, a thirteenth slit a13 is further disposed on the seventh metal unit P7, two ends of the thirteenth slit a13 are communicated with the side edge of the metal rear cover, a distance is provided between the middle section of the thirteenth slit a13 and the edge of the metal rear cover, and the seventh metal unit P7 is divided into two parts by the thirteenth slit a 13: the eighth metal cell P8 and the ninth metal cell P9, the fifth antenna ANT5 can provide a ninth resonance of a left-hand mode by forming a fifth antenna ANT5 in a portion thereof.
The thirteenth slit a13 may be located to the left of the terminal device's central axis a-a or to the right of the terminal device's central axis a-a when the terminal device is placed according to the coordinate system used in fig. 16. The thirteenth slit a13 is disposed on the left side of the central axis a-a of the terminal device as an example and will be described in detail below:
As shown in fig. 16 and 17A, a thirteenth slit a13 is provided on the left side of the central axis a-a of the terminal device, and the seventh metal element P7 is divided into two parts by a thirteenth slit a 13: an eighth metal unit P8 and a ninth metal unit P9, wherein the eighth metal unit P8 is used for implementing the fifth antenna ANT5, and a plurality of grounding points are disposed on the ninth metal unit P9, and the plurality of grounding points may be spaced along an edge of the ninth metal unit P9, so that the ninth metal unit P9 is a reference ground.
The eighth metal element P8 is electrically connected to the fifth feed 502 through the fifth feed point 501, the eighth metal element P8 receives an electrical signal input by the fifth feed 502 through the fifth feed point 501, the eighth metal element P8 is further connected to a fifth ground point GND5 to form a part of a fifth antenna ANT5, and the fifth antenna ANT5 is configured to provide a ninth resonance in a left-hand mode, where a frequency of the ninth resonance includes a fourth communication frequency. Wherein the frequency ranges of the fourth communication frequency and the first communication frequency may be different.
Optionally, the eighth metal unit P8 may further include an extended fifth radiation branch (not shown in the figure), and the fifth radiation branch may be an FPC or a circuit pattern that is chemically plated on a support through an LDS, or may also be implemented in other ways, which is not limited in this embodiment of the application.
The specific structure of the fifth feeding point 501 may refer to the detailed description of the first feeding point 101, and the specific structure of the fifth feeding point 502 may refer to the detailed description of the first feeding point 102, which are not described herein again.
It should be noted that, in the embodiment of the present application, the fifth feeding point 501 may be disposed on the eighth metal element P8 near any one end of the thirteenth slot a 13.
When the fifth feed 502 inputs an electrical signal to the eighth metallic element P8, the eighth metallic element P8 can excite a radio frequency electromagnetic field, and radiate an electromagnetic wave to the space, so as to form a ninth resonance of a left-hand mode, wherein the length of the eighth metallic element P8 may be a quarter of the wavelength of the ninth resonance.
For example, when the first possible implementation manner or the second possible implementation manner is adopted, the fifth antenna ANT5 may be set to be a wifi antenna, or a wifi antenna and a bluetooth antenna, and the frequency of the ninth resonance includes 2400MHz to 2500 MHz. For example, when the third possible implementation manner or the fourth possible implementation manner is adopted, the fifth antenna ANT5 may be configured as a diversity antenna, and the ninth resonance may be used to implement other communication frequencies of the diversity antenna besides the first communication frequency, for example, the frequency of the ninth resonance may include 880-960 MHz.
When the first possible implementation manner or the second possible implementation manner is adopted, the fifth antenna ANT5 may be set as a GPS antenna or a wifi antenna and a bluetooth antenna. In some embodiments, a radiating branch may be added to the fifth antenna ANT5 to make the fifth antenna provide other resonances, for example, the frequency of the resonance may include 1575.42MHz or 1176.45MHz, and then the fifth antenna ANT5 may be configured as a GPS antenna.
In the embodiment of the application, the thirteenth slot a13 is formed in the metal rear cover, the seventh metal unit P7 is divided into the eighth metal unit P8 and the ninth metal unit P9 through the thirteenth slot a13, the fifth antenna ANT5 is implemented by using the eighth metal unit P8, the fifth antenna ANT5 can be set as a GPS antenna, a GPS antenna and a wifi antenna, or a diversity antenna, and the like, so that diversified wireless communication bands of the terminal device can be better satisfied.
Optionally, the fifth antenna ANT5 further includes a fifth matching circuit 503, and specifically, the eighth metal element P8 is connected to one end of the fifth matching circuit 503 through a fifth feeding point 501, and the other end of the fifth matching circuit 503 is connected to the fifth feed 502.
For example, the fifth matching circuit 503 may include a capacitor connected to ground or a series inductor or a series capacitor or a parallel inductor, or a capacitor connected to ground and a series inductor, or a capacitor connected in series and a parallel inductor. When the fifth matching circuit 503 includes a grounded capacitor, the eighth metal element P8 is respectively connected to one end of the capacitor and the fifth feed 502 through the fifth feed point 501, and the other end of the capacitor is grounded; when the fifth matching circuit 503 includes an inductor connected in series, the eighth metal element P8 is connected to one end of the inductor connected in series through the fifth feeding point 501, and the other end of the inductor connected in series is connected to the fifth feed 502; when the fifth matching circuit 503 includes capacitors connected in series, the eighth metal unit P8 is connected to one end of the capacitors connected in series through the fifth feeding point 501, and the other end of the capacitor is connected to the fifth feeding source 502; when the fifth matching circuit 503 includes inductors connected in parallel, the eighth metal unit P8 is respectively connected to one end of the inductor and the fifth feed source 502 through the fifth feed point 501, and the other end of the inductor is grounded; when the fifth matching circuit 503 includes a grounded capacitor and a series inductor, the eighth metal element P8 is connected to one end of the series inductor through the fifth feeding point 501, the other end of the series inductor is connected to one end of the capacitor and the fifth feeding source 502, respectively, and the other end of the capacitor is grounded, or the eighth metal element P8 is connected to one end of the capacitor and one end of the series inductor, respectively, through the fifth feeding point 501, and the other end of the series inductor is connected to the fifth feeding source 502; when the fifth matching circuit 503 includes a capacitor and an inductor connected in parallel in series, the eighth metal element P8 is connected to one end of the capacitor through the fifth feeding point 501, the other end of the capacitor is connected to one end of the inductor and the fifth feeding source 502, respectively, and the other end of the inductor is grounded, or the eighth metal element P8 is connected to one end of the inductor and one end of the capacitor through the fifth feeding point 501, respectively, the other end of the inductor is grounded, and the other end of the capacitor is connected to the fifth feeding source 502. In practical applications, the fifth matching circuit 503 may include one or more of a capacitor connected to ground, or a capacitor connected in series, or an inductor connected in parallel, and if there are multiple capacitors, the connection order thereof may be set according to practical requirements, and is not limited to the above-described manner.
The fifth matching circuit 503 can adjust the impedance of the ninth resonance so that the return loss value of the ninth resonance is smaller, and the OTA performance is higher when the fifth antenna ANT5 operates at the ninth resonance.
In some embodiments, the thirteenth aperture a13 may also be disposed on the right side of the central axis a-a of the terminal device, and the structure and implementation principle thereof are similar to the thirteenth aperture a13 disposed on the left side of the central axis a-a of the terminal device, which will not be expanded.
In practical applications, the terminal device usually has multiple wireless communication functions such as cellular, wifi, bluetooth and GPS, and accordingly, the terminal device usually includes a main antenna, a diversity antenna, a wifi antenna, a bluetooth antenna and a GPS antenna. With the solutions in the above embodiments, each antenna may be set through the following several possible implementation manners:
a first possible implementation:
a first possible implementation: setting the first antenna ANT1 as a diversity antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing a first communication frequency of the diversity antenna, the second antenna ANT2 is set as a diversity antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing a second communication frequency of the diversity antenna; the third antenna ANT3 is set as a main set antenna, and specifically, the fourth resonance, the fifth resonance, and the sixth resonance provided by the third antenna ANT3 are used to implement the first communication frequency of the main set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to implement the third communication frequency of the main set antenna. The second communication frequency and the third communication frequency may be the same or different.
The fifth antenna ANT5 is set to be a GPS antenna, and if the superimposed frequency of the first resonance, the second resonance, and the third resonance includes 1575.42MHz, the frequency of the ninth resonance includes 1176.45 MHz; if the communication frequency of the diversity antenna does not include the second communication frequency or the superimposed frequency of the first resonance, the second resonance and the third resonance does not include 1575.42MHz, the frequency of the ninth resonance may include 1575.42MHz or 1176.45 MHz.
A second possible implementation: the third antenna ANT3 is set as a diversity antenna, the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna ANT3 are used to realize the first communication frequency of the diversity antenna, the fourth antenna ANT4 is set as a diversity antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to realize the third communication frequency of the diversity antenna; the first antenna ANT1 is set as a main set antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the main set antenna, the second antenna ANT2 is set as a main set antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing the second communication frequency of the main set antenna.
The fifth antenna ANT5 is set to be a GPS antenna, and if the superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes 1575.42MHz, the frequency of the ninth resonance includes 1176.45 MHz; if the communication frequency of the diversity antenna does not include the third communication frequency or the superimposed frequency of the fourth resonance, the fifth resonance and the sixth resonance does not include 1575.42MHz, the frequency of the ninth resonance may include 1575.42MHz or 1176.45 MHz.
A third possible implementation: setting the first antenna ANT1 as a diversity antenna, the first resonance second resonance and the third resonance provided by the first antenna ANT1 being used to realize the first communication frequency of the diversity antenna; the second antenna ANT2 is set as a GPS antenna, and the frequency of the seventh resonance provided by the second antenna ANT2 includes 1176.45MHz or 1575.42 MHz; the third antenna ANT3 is set as a main set antenna, the fourth resonance, the fifth resonance, and the sixth resonance provided by the third antenna ANT3 are used to implement the first communication frequency of the main set antenna, the fourth antenna ANT4 is set as a main set antenna, and the eighth resonance provided by the fourth antenna ANT4 is used to implement the third communication frequency of the main set antenna.
In addition, if the frequency of the superimposed first resonance, second resonance and third resonance includes 1575.42MHz, the first antenna ANT1 may be further configured as a GPS antenna, and accordingly, the frequency of the seventh resonance provided by the second antenna ANT2 includes 1176.45 MHz.
A fourth possible implementation: the first antenna ANT1 is set as a main set antenna, the first resonance, the second resonance and the third resonance provided by the first antenna ANT1 are used for realizing the first communication frequency of the main set antenna, the second antenna ANT2 is set as the main set antenna, and the seventh resonance provided by the second antenna ANT2 is used for realizing the second communication frequency of the main set antenna; the third antenna ANT3 is set as a diversity antenna, and the fourth resonance, the fifth resonance and the sixth resonance provided by the third antenna ANT3 are used for realizing the first communication frequency of the diversity antenna; the fourth antenna ANT4 is provided as a GPS antenna, and the frequency of the eighth resonance provided by the fourth antenna ANT4 includes 1176.45MHz or 1575.42 MHz.
In addition, if the superimposed frequency of the fourth resonance, the fifth resonance and the sixth resonance includes 1575.42MHz, the third antenna ANT3 may be further configured as a GPS antenna, and accordingly, the frequency of the eighth resonance provided by the fourth antenna ANT4 includes 1176.45 MHz.
In order to better satisfy diversified wireless communication bands of the terminal device, embodiments of the present application provide a terminal device, on the basis of ensuring OTA performance of first communication frequencies of an antenna at the bottom and an antenna at the top of the terminal device, and a handset mode SAR and/or a head mode SAR of the antenna at the top and a body SAR of the antenna at the bottom are/is lower, which can satisfy SAR-related standards without backspacing an input power, and can also satisfy diversified communication bands of the terminal device.
Referring to fig. 16, a fourteenth slit a14 is further formed on the metal rear cover. Specifically, a fourteenth slit a14 is further disposed on the ninth metal unit P9, two ends of the fourteenth slit a14 are communicated with the side edge of the metal rear cover, a distance is provided between the middle section of the fourteenth slit a14 and the edge of the metal rear cover, and the ninth metal unit P9 is divided into two parts by the fourteenth slit a 14: the tenth metal unit P10 and the eleventh metal unit P11, by which a portion forms a portion of the sixth antenna ANT6, the sixth antenna ANT6 can provide a tenth resonance of a left-hand mode.
In this embodiment, the tenth metal unit P10 is used to implement the sixth antenna ANT6, a plurality of grounding points may be disposed on the eleventh metal unit P11, the plurality of grounding points may be disposed at intervals along an edge of the eleventh metal unit P11, and the eleventh metal unit P11 is used as a reference ground.
It should be noted that, when the terminal device is placed according to the coordinate system adopted in fig. 16, if the thirteenth gap a13 is disposed on the left side of the central axis a-a of the terminal device, the fourteenth gap a14 may be disposed on the right side of the central axis a-a of the terminal device, and if the thirteenth gap a13 is disposed on the right side of the central axis a-a of the terminal device, the fourteenth gap a14 may be disposed on the left side of the central axis a-a of the terminal device. The thirteenth gap a13 and the fourteenth gap a14 may also be disposed on the same side, e.g., the thirteenth gap a13 and the fourteenth gap a14 are both disposed on the right side of the central axis a-a of the terminal device, or the thirteenth gap a13 and the fourteenth gap a14 are both disposed on the left side of the central axis a-a of the terminal device. Which can be specifically set according to requirements.
In this embodiment, a thirteenth slit a13 and a fourteenth slit a14 are provided on the left and right sides of the central axis a-a of the terminal device, respectively.
The tenth metal element P10 is electrically connected to the sixth feed 602 through the sixth feed point 601, the tenth metal element P10 receives an electrical signal input from the sixth feed 602 through the sixth feed point 601, the tenth metal element P10 is further connected to a sixth ground point GND6 to form a part of a sixth antenna ANT6, the sixth antenna ANT6 is configured to provide a tenth resonance of a left-hand mode, a frequency of the tenth resonance includes a fifth communication frequency, for example, the fifth communication frequency includes 2400MHz-2500 MHz.
In the embodiment of the present application, the sixth feeding point 601 may be disposed on the tenth metal element P10 at a position close to any one end point of the fourteenth slot a 14.
When the sixth feed 602 inputs an electrical signal to the tenth metallic element P10, the tenth metallic element P10 can excite a radio frequency electromagnetic field, and radiate an electromagnetic wave to the space, thereby forming a tenth resonance of a left-hand mode, wherein the length of the tenth metallic element P10 is about a quarter of the wavelength of the tenth resonance. For example: the fifth communication frequency includes 2400MHz to 2500MHz, and when the antennas of the terminal device are set in the above two possible manners, the sixth antenna ANT6 may be set to be a wifi antenna, or a wifi antenna and a bluetooth antenna.
Optionally, the tenth metal unit P10 may further include an extended sixth radiation branch (not shown in the figure), and the sixth radiation branch may be an FPC or a circuit pattern plated on the support through an LDS, or may also be implemented in other ways, which is not limited by the embodiment of the present application.
The specific structure of the sixth feeding point 601 may refer to the detailed description of the first feeding point 101, and the specific structure of the sixth feeding point 602 may refer to the detailed description of the first feeding point 102, which are not described herein again.
Optionally, the sixth antenna ANT6 further includes a sixth matching circuit 603, the tenth metal element P10 is connected to one end of the sixth matching circuit 603 through a sixth feeding point 601, and the other end of the sixth matching circuit 603 is connected to the sixth feed 602.
For example, the sixth matching circuit 603 may include a capacitor connected to ground or a series inductor or a series capacitor or a parallel inductor, or a capacitor connected to ground and a series inductor, or a capacitor connected in series and a parallel inductor. When the sixth matching circuit 603 includes a capacitor connected to ground, the tenth metal element P10 is connected to one end of the capacitor and the sixth feed 602 through the sixth feed point 601, respectively, and the other end of the capacitor is connected to ground; when the sixth matching circuit 603 includes an inductor connected in series, the tenth metal element P10 is connected to one end of the inductor connected in series through the sixth feeding point 601, and the other end of the inductor connected in series is connected to the sixth feeding source 602; when the sixth matching circuit 603 includes capacitors connected in series, the tenth metal element P10 is connected to one end of the capacitors connected in series through the sixth feeding point 601, and the other end of the capacitor is connected to the sixth feeding source 602; when the sixth matching circuit 603 includes inductors connected in parallel, one end of the inductor and the sixth feed 602 are connected to the tenth metal element P10 through the sixth feed point 601, respectively, and the other end of the inductor is grounded; when the sixth matching circuit 603 includes a grounded capacitor and a serially connected inductor, the tenth metal element P10 is connected to one end of the serially connected inductor through the sixth feeding point 601, the other end of the serially connected inductor is connected to one end of the capacitor and the sixth feeding source 602 respectively, and the other end of the capacitor is grounded, or the tenth metal element P10 is connected to one end of the capacitor and one end of the serially connected inductor through the sixth feeding point 601 respectively, and the other end of the serially connected inductor is connected to the sixth feeding source 602; when the sixth matching circuit 603 includes a capacitor and an inductor connected in parallel in series, the tenth metal element P10 is connected to one end of the capacitor through the sixth feeding point 601, the other end of the capacitor is connected to one end of the inductor and the sixth feeding source 602 respectively, and the other end of the inductor is grounded, or the tenth metal element P10 is connected to one end of the inductor and one end of the capacitor through the sixth feeding point 601 respectively, the other end of the inductor is grounded, and the other end of the capacitor is connected to the sixth feeding source 602. In practical applications, the sixth matching circuit 603 may include one or more of a capacitor connected to ground, a series inductor, a series capacitor, or a parallel inductor, and if there are more than one, the connection order may be set according to practical requirements, and is not limited to the above-described manner.
The sixth matching circuit 603 may adjust the impedance of the tenth resonance so that the return loss value of the tenth resonance is smaller, and the OTA performance is higher when the sixth antenna ANT6 operates at the tenth resonance.
In the terminal device provided in this embodiment, the thirteenth slot a13 is formed in the metal rear cover of the terminal device, the seventh metal element P7 is divided into the eighth metal element P8 and the ninth metal element P9, the eighth metal element P8 is used to form the fifth antenna ANT5, the fifth antenna ANT5 provides the ninth resonance, and if the frequency of the ninth resonance includes 1575.42MHz or 1176.45MHz, the fifth antenna may be set as a GPS antenna; further, by providing a fourteenth slot a14 on the metal rear cover of the terminal device, the ninth metal unit P9 is divided into a tenth metal unit P10 and an eleventh metal unit P11, a sixth antenna ANT6 is formed using the tenth metal unit P10, the sixth antenna ANT6 provides a tenth resonance, and if the frequency of the tenth resonance includes 2400MHz-2500MHz, the sixth antenna ANT6 may be set as a wifi antenna or a wifi antenna and a bluetooth antenna. The terminal device provided by the embodiment can ensure OTA performance of the top antenna and the bottom antenna at the first communication frequency, SAR of the head mode and the head-hand mode is lower when the top antenna works at the first communication frequency, and body SAR is lower when the bottom antenna works at the first communication frequency, and diversified wireless communication frequency bands of the terminal device can be further met.
In some embodiments, when the thirteenth slit a13 is disposed on the right side of the central axis a-a of the terminal device, the fourteenth slit a14 is disposed on the left side of the central axis a-a of the terminal device, and the thirteenth slit a13 and the fourteenth slit a14 are disposed on the same side, the structure and implementation principle are similar to the thirteenth slit a13 disposed on the left side of the central axis a-a of the terminal device, and the fourteenth slit a14 is disposed on the right side of the central axis a-a of the terminal device, which will not be described herein again.

Claims (27)

1. A terminal device, comprising: a metal frame, wherein the metal frame is provided with a first gap, a second gap, a third gap and a fourth gap, the first, second, third, and fourth gaps divide the metal bezel into a first metal bezel section, a second metal bezel section, a third metal bezel section, and a fourth metal bezel section, wherein the first gap and the second gap are disposed at the top edge of the metal frame, the third gap and the fourth gap are disposed at the bottom edge of the metal frame, the first metal bezel segment is positioned between the first gap and the fourth gap, the second metal bezel segment is positioned between the first gap and the second gap, the third metal frame segment is positioned between the second gap and the third gap, and the fourth metal frame segment is positioned between the third gap and the fourth gap;
A first grounding point and a fourth grounding point are arranged on the first metal frame section, the first grounding point is the grounding point which is closest to the first gap among the grounding points on the first metal frame section, the fourth grounding point is the grounding point which is closest to the fourth gap among the grounding points on the first metal frame section, the first radiation branch section comprises the metal frame section from the first grounding point on the first metal frame section to the first gap, and the fourth radiation branch section comprises the metal frame section from the fourth grounding point on the first metal frame section to the fourth gap;
a second grounding point and a third grounding point are arranged on the third metal frame section, the second grounding point is the grounding point which is closest to the second gap among the grounding points on the third metal frame section, the third grounding point is the grounding point which is closest to the third gap among the grounding points on the third metal frame section, the second radiation branch section comprises the metal frame section which is arranged between the second grounding point and the second gap on the third metal frame section, and the third radiation branch section comprises the metal frame section which is arranged between the third grounding point and the third gap on the third metal frame section;
The first radiating branch node, the second metal frame section, the second radiating branch node, the first feed point and the first feed source form a part of a first antenna, the first radiating branch node is used for providing a first resonance in a left-hand mode, the second metal frame section is arranged in a suspended manner, the second metal frame section is used for providing a second resonance in a current loop mode, and the second radiating branch node is used for providing a third resonance in a gap mode;
the superposed frequency of the first resonance, the second resonance and the third resonance comprises a first communication frequency;
the third radiating branch section, the fourth metal frame section, the fourth radiating branch section, the third feed point and the third feed source form part of a third antenna, the third radiating branch section is used for providing a fourth resonance in a left-hand mode, the fourth metal frame section is arranged in a suspended manner, the fourth metal frame section is used for providing a fifth resonance in a current loop mode, and the fourth radiating branch section is used for providing a sixth resonance in a gap mode;
The superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes the first communication frequency.
2. The terminal device of claim 1, wherein the first communication frequency comprises 1710MHz-2690 MHz.
3. The terminal device of claim 1, wherein the superimposed frequencies of the first resonance, the second resonance, and the third resonance further comprise: 1575.42 MHz.
4. The terminal device of claim 1, further comprising: a second feed point and a second feed source;
one end of the second radiation branch node, which is close to the second slot, is electrically connected with the second feed point through the second feed point, the second radiation branch node, the second feed point and the second feed source form part of a second antenna, the second antenna is further used for providing a seventh resonance in a left-hand mode, the frequency of the seventh resonance comprises a second communication frequency, and the second communication frequency is different from the frequency range of the first communication frequency.
5. The terminal device of claim 4, further comprising: a fourth feed point and a fourth feed source;
Wherein one end of the fourth radiation branch near the fourth slot is electrically connected with the fourth feed point through the fourth feed point, and the fourth radiation branch, the fourth feed point and the fourth feed form a part of a fourth antenna,
the fourth antenna is further configured to provide an eighth resonance for a left-handed mode, a frequency of the eighth resonance including a third communication frequency, the third communication frequency being in a different frequency range than the first communication frequency.
6. The terminal device of claim 5, wherein one or more of the first antenna, the second antenna, the third antenna, and the fourth antenna further comprise respective matching circuits;
if the first antenna further comprises a first matching circuit, the first radiation branch is connected with one end of the first matching circuit through the first feed point, and the other end of the first matching circuit is connected with the first feed source;
if the second antenna further comprises a second matching circuit, the second radiating branch is connected with one end of the second matching circuit through the second feed point, and the other end of the second matching circuit is connected with the second feed source;
If the third antenna further comprises a third matching circuit, the third radiating branch is connected with one end of the third matching circuit through the third feed point, and the other end of the third matching circuit is connected with the third feed source;
if the fourth antenna further comprises a fourth matching circuit, the fourth radiation branch is connected with one end of the fourth matching circuit through the fourth feeding point, and the other end of the fourth matching circuit is connected with the fourth feed source.
7. The terminal device according to claim 6, wherein the first antenna and/or the third antenna further comprises a corresponding antenna adjusting circuit, the antenna adjusting circuit comprises at least one branch, and the antenna adjusting circuit is configured to conduct the corresponding branch according to an adjusting instruction of the terminal device, so as to adjust a frequency of a resonance provided by the first antenna and/or the third antenna;
if the first antenna further comprises a first antenna adjusting circuit, the first radiating branch is respectively connected with one end of the first antenna adjusting circuit and one end of the first matching circuit through the first feed point, the other end of the first antenna adjusting circuit is grounded, and the first matching circuit is connected with the first feed source; or,
The first radiating branch is connected with one end of the first matching circuit through the first feed point, the other end of the first matching circuit is connected with the first feed source, the first radiating branch is connected with one end of the first antenna adjusting circuit through a first connecting point, and the other end of the first antenna adjusting circuit is grounded;
if the third antenna further comprises a third antenna adjusting circuit, the third radiation branch is respectively connected with one end of the third antenna adjusting circuit and one end of the third matching circuit through the third feed point, the other end of the third antenna adjusting circuit is grounded, and the third matching circuit is connected with the third feed source;
the third radiation branch is connected with one end of the third matching circuit through the third feed point, the other end of the third matching circuit is connected with the third feed source, the third radiation branch is connected with one end of the third antenna adjusting circuit through a third connection point, and the other end of the third antenna adjusting circuit is grounded.
8. The terminal device according to claim 7, wherein a fifth gap is further disposed on the metal bezel, and the fifth gap is disposed on a first metal bezel section or a third metal bezel section, and the fifth gap divides the first metal bezel section or the third metal bezel section into a fifth metal bezel section and a sixth metal bezel section;
A fifth grounding point is further arranged on the fifth metal frame section or the sixth metal frame section, and the fifth grounding point is the grounding point which is closest to the fifth gap among the grounding points on the fifth metal frame section or the sixth metal frame section;
the fifth radiating branch section comprises a metal frame section from the fifth grounding point to the fifth gap, the fifth radiating branch section is electrically connected with a fifth feed source through a fifth feed point to form a part of a fifth antenna, the fifth antenna is used for providing a ninth resonance of a left-hand mode, and the frequency of the ninth resonance comprises a fourth communication frequency.
9. The terminal device of claim 8, wherein the fifth antenna further comprises a fifth matching circuit, the fifth radiating branch is connected to one end of the fifth matching circuit through the fifth feeding point, and the other end of the fifth matching circuit is connected to the fifth feeding source.
10. The terminal device according to claim 9, characterized in that the frequency of the seventh resonance comprises a second communication frequency, correspondingly the frequency of the ninth resonance comprises 1575.42MHz or 1176.45 MHz; alternatively, the frequency of the seventh resonance comprises 1575.42MHz or 1176.45MHz, and the frequency of the ninth resonance comprises the second communication frequency, wherein the second communication frequency is different from the frequency of the ninth resonance.
11. The terminal device of claim 10, wherein a sixth gap is further disposed in the metal bezel, the sixth gap being disposed in the first metal bezel segment, the sixth gap dividing the first metal bezel segment into a seventh metal bezel segment and an eighth metal bezel segment;
a sixth grounding point is further arranged on the seventh metal frame section or the eighth metal frame section, and the sixth grounding point is the grounding point which is closest to the sixth gap among the grounding points on the seventh metal frame section or the eighth metal frame section;
the sixth radiating branch section comprises a metal frame section from the sixth grounding point to the sixth gap, the sixth radiating branch section is electrically connected with the sixth feed source through the sixth feed point to form a part of a sixth antenna, the sixth antenna is used for providing a tenth resonance of a left-hand mode, and the frequency of the tenth resonance comprises a fifth communication frequency.
12. The terminal device of claim 10, wherein a sixth gap is disposed in the metal bezel section, the sixth gap being disposed in the third metal bezel section, the sixth gap dividing the third metal bezel section into a seventh metal bezel section and an eighth metal bezel section;
A sixth grounding point is further arranged on the seventh metal frame section or the eighth metal frame section, and the sixth grounding point is the grounding point which is closest to the sixth gap among the grounding points on the seventh metal frame section or the eighth metal frame section;
the sixth radiating branch section comprises a metal frame section from the sixth grounding point to the sixth gap, the sixth radiating branch section is electrically connected with the sixth feed source through the sixth feed point to form a part of a sixth antenna, the sixth antenna is used for providing a tenth resonance of a left-hand mode, and the frequency of the tenth resonance comprises a fifth communication frequency.
13. The terminal device according to claim 11 or 12, wherein the sixth antenna further comprises a sixth matching circuit, the sixth radiating branch is connected to one end of the sixth matching circuit through the sixth feeding point, and the other end of the sixth matching circuit is connected to the sixth feed.
14. The terminal device of claim 13, wherein the fifth communication frequency comprises 2400MHz-2500 MHz.
15. A terminal device, comprising: the metal rear cover is provided with a seventh gap, an eighth gap, a ninth gap, a tenth gap, an eleventh gap and a twelfth gap, and the seventh gap, the eighth gap, the ninth gap, the tenth gap, the eleventh gap and the twelfth gap divide the metal rear cover into a first metal unit, a second metal unit, a third metal unit, a fourth metal unit, a fifth metal unit, a sixth metal unit and a seventh metal unit;
The seventh gap is arranged at the top of the metal rear cover, the extending direction of the seventh gap is parallel to the width direction of the metal rear cover, two ends of the seventh gap are respectively intersected with the edge of the metal rear cover, the eighth gap and the ninth gap are arranged at intervals along the width direction of the metal rear cover, one end of the eighth gap is intersected with the seventh gap, the other end of the eighth gap extends to the edge of the top of the metal rear cover, one end of the ninth gap is intersected with the seventh gap, and the other end of the ninth gap extends to the edge of the top of the metal rear cover;
the tenth gap is arranged at the bottom of the metal rear cover, the extending direction of the tenth gap is parallel to the width direction of the metal rear cover, two ends of the tenth gap are respectively intersected with the edge of the metal rear cover, the eleventh gap and the twelfth gap are arranged at intervals along the width direction of the metal rear cover, the eleventh gap is intersected with the tenth gap, the other end of the eleventh gap extends to the edge of the bottom of the metal rear cover, the twelfth gap is intersected with the tenth gap, and the other end of the twelfth gap extends to the edge of the bottom of the metal rear cover,
A first grounding point is arranged on the first metal unit and is positioned at a position, close to the side edge of the metal rear cover, on the first metal unit, one end, close to the eighth slot, on the first metal unit is electrically connected with a first feed source through a first feed point, the first metal unit, the second metal unit, the third metal unit, the first feed point and the first feed source form a part of a first antenna, the first metal unit is used for providing a first resonance in a left-hand mode, the second metal unit is arranged in a suspension mode, the second metal unit is used for providing a second resonance in a current loop mode, and the third metal unit is used for providing a third resonance in a slot mode;
the superposed frequency of the first resonance, the second resonance and the third resonance comprises a first communication frequency;
the fourth metal unit is provided with a third grounding point, the third grounding point is located at a position, close to the side edge of the metal rear cover, on the fourth metal unit, one end, close to the eleventh slot, of the fourth metal unit is electrically connected with a third feed source through a third feed point, the fourth metal unit, the fifth metal unit, the sixth metal unit, the third feed point and the third feed source form a part of a third antenna, the fourth metal unit is used for providing a fourth resonance in a left-hand mode, the fifth metal unit is arranged in a suspended manner, the fifth metal unit is used for providing a fifth resonance in a current loop mode, and the sixth metal unit is used for providing a sixth resonance in a slot mode;
The superimposed frequency of the fourth resonance, the fifth resonance, and the sixth resonance includes the first communication frequency.
16. The terminal device of claim 15, wherein the first communication frequency comprises 1710MHz-2690 MHz.
17. The terminal device of claim 15, wherein the superimposed frequencies of the first resonance, the second resonance, and the third resonance further comprise: 1575.42 MHz.
18. The terminal device according to claim 15, further comprising: a second feed point and a second feed source;
wherein an end of the third metal element close to the ninth slot is electrically connected to the second feed source through the second feed point, the third metal element, the second feed point and the second feed source form a part of a second antenna, the second antenna is configured to provide a seventh resonance in a left-hand mode, a frequency of the seventh resonance includes a second communication frequency, and the second communication frequency is different from a frequency range of the first communication frequency.
19. The terminal device of claim 18, further comprising: a fourth feed point and a fourth feed source;
Wherein an end of the sixth metal element close to the twelfth slot is electrically connected to the fourth feed source through the fourth feed point, the sixth metal element, the fourth feed point and the fourth feed source form a part of a fourth antenna, the fourth antenna is configured to provide an eighth resonance in a left-hand mode, a frequency of the eighth resonance includes a third communication frequency, and a frequency range of the third communication frequency is different from a frequency range of the first communication frequency.
20. The terminal device of claim 19, wherein one or more of the first antenna, the second antenna, the third antenna, and the fourth antenna further comprise respective matching circuits;
if the first antenna further comprises a first matching circuit, the first metal unit is connected with one end of the first matching circuit through the first feeding point, and the other end of the first matching circuit is connected with the first feed source;
if the second antenna further comprises a second matching circuit, the third metal unit is connected with one end of the second matching circuit through the second feeding point, and the other end of the second matching circuit is connected with the second feed source;
If the third antenna further comprises a third matching circuit, the fourth metal unit is connected with one end of the third matching circuit through the third feeding point, and the other end of the third matching circuit is connected with the third feed source;
if the fourth antenna further comprises a fourth matching circuit, the sixth metal element is connected with one end of the fourth matching circuit through the fourth feeding point, and the other end of the fourth matching circuit is connected with the fourth feed source.
21. The terminal device according to claim 20, wherein the first antenna and/or the third antenna further comprises a corresponding antenna adjusting circuit, the antenna adjusting circuit comprises at least one branch, and the antenna adjusting circuit is configured to conduct the corresponding branch according to an adjusting instruction of the terminal device, so as to adjust a frequency of a resonance provided by the first antenna and/or the third antenna;
if the first antenna comprises a first antenna adjusting circuit, the first metal element is respectively connected with one end of the first antenna adjusting circuit and one end of the first matching circuit through the first feed point, the other end of the first antenna adjusting circuit is grounded, and the first matching circuit is connected with the first feed source; or,
The first metal unit is connected with one end of the first matching circuit through the first feed point, the other end of the first matching circuit is connected with the first feed source, the first metal unit is connected with one end of the first antenna adjusting circuit through a first connecting point, and the other end of the first antenna adjusting circuit is grounded;
if the third antenna further comprises a third antenna adjusting circuit, the fourth metal unit is respectively connected with one end of the third antenna adjusting circuit and one end of the third matching circuit through the third feeding point, the other end of the third antenna adjusting circuit is grounded, and the other end of the third matching circuit is connected with the third feed source; or,
the fourth metal unit is connected with one end of the third matching circuit through the third feed point, the other end of the third matching circuit is connected with the third feed source, the fourth metal unit is connected with one end of the third antenna adjusting circuit through the third connection point, and the other end of the third antenna adjusting circuit is grounded.
22. The terminal device of claim 21, wherein a thirteenth slit is further disposed on the metal rear cover, the thirteenth slit is disposed on one side edge of the seventh metal unit, two ends of the thirteenth slit are communicated with the side edge of the metal rear cover, a middle section of the thirteenth slit has a distance from the edge of the metal rear cover, and the thirteenth slit divides the seventh metal unit into an eighth metal unit and a ninth metal unit;
The eighth metal element is electrically connected with a fifth feed source through a fifth feed point to form part of a fifth antenna, the fifth antenna is used for providing a ninth resonance of a left-hand mode, and the frequency of the ninth resonance comprises a fourth communication frequency.
23. The terminal device of claim 22, wherein the fifth antenna further comprises a fifth matching circuit, wherein the eighth metal element is connected to one end of the fifth matching circuit through the fifth feeding point, and wherein the other end of the fifth matching circuit is connected to the fifth feeding point.
24. The terminal device according to claim 23, wherein the frequency of the seventh resonance comprises a second communication frequency, and correspondingly the frequency of the ninth resonance comprises 1575.42MHz or 1176.45 MHz; alternatively, the frequency of the seventh resonance comprises 1575.42MHz or 1176.45MHz, and the frequency of the ninth resonance comprises the second communication frequency, wherein the second communication frequency is different from the frequency of the ninth resonance.
25. The terminal device according to claim 24, wherein a fourteenth slot is further disposed on the metal rear cover, the fourteenth slot is disposed at one side edge of the ninth metal unit, two ends of the fourteenth slot are communicated with an edge of the metal rear cover, a middle section of the fourteenth slot has a distance from the edge of the metal rear cover, and the fourteenth slot divides the ninth metal unit into a tenth metal unit and an eleventh metal unit;
The tenth metal element is electrically connected to the sixth feed through the sixth feed point to form a part of a sixth antenna, the sixth antenna is configured to provide a tenth resonance of a left-hand mode, and a frequency of the tenth resonance includes a fifth communication frequency.
26. The terminal device of claim 25, wherein the sixth antenna further comprises a sixth matching circuit, wherein the tenth metal element is connected to one end of the sixth matching circuit through the sixth feeding point, and wherein the other end of the sixth matching circuit is connected to the sixth feeding point.
27. A terminal device according to claim 25 or 26, characterised in that the fifth communication frequency comprises 2400-2500 MHz.
CN201910996320.XA 2019-10-18 2019-10-18 Terminal device Active CN112689033B (en)

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CN113871872B (en) * 2021-09-07 2022-08-16 荣耀终端有限公司 Multi-antenna system and wireless communication equipment
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