CN110323541B - Terminal - Google Patents
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- CN110323541B CN110323541B CN201910517541.4A CN201910517541A CN110323541B CN 110323541 B CN110323541 B CN 110323541B CN 201910517541 A CN201910517541 A CN 201910517541A CN 110323541 B CN110323541 B CN 110323541B
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- capacitive dielectric
- metal body
- dielectric metal
- antenna
- terminal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a terminal, which comprises: the antenna radiator, the antenna radiator connects the signal source, the terminal still includes: the antenna comprises a metal shell, wherein the metal shell comprises a metal frame and a metal back plate, the metal frame is provided with at least two slots, at least one capacitive medium metal body is arranged in each slot, the metal back plate, the at least one capacitive medium metal body and the antenna radiating body form a series loop, and a first switch device and a matching device are connected in series in the series loop. In the embodiment of the invention, the equivalent inductance-capacitance value formed between the antenna radiator and the capacitive dielectric metal body, the metal frame or the metal back plate is changed through different states of the capacitive dielectric metal body, so that the coverage of different frequency bands is realized.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a terminal.
Background
With the continuous development of metal-texture mobile phone technology, the terminal made of metal is gradually sought by consumers due to the unique texture and luster, and becomes a design standard for medium-high-end models. With the development of the appearance and design technology of the mobile phone, the mobile phone with an all-metal shell also becomes the development trend of all products in the industry. Therefore, the design of the dissimilar metal appearance such as three-section type and micro-seam also becomes an important selling point.
Due to the uniqueness of antenna radiation, the terminal antenna has direct influence on the performance of the antenna on the wiring area, the antenna height, the antenna clearance and the avoidance of the antenna on peripheral metal, and the terminal antenna is required to be ensured in the practical design. The metal has a shielding effect on electromagnetic waves, so that the radiation efficiency and the bandwidth of the antenna are continuously reduced while the design space of the mobile phone antenna is continuously deteriorated, meanwhile, the design environment of the antenna is also fixed by the appearance of the metal shell mobile phone, the design difficulty is greatly brought to the multi-frequency design of the antenna, and the guarantee of the performance of the mobile phone antenna is more and more the key point of the mobile phone design.
Disclosure of Invention
The embodiment of the invention provides a terminal, which is used for solving the problem that the radiation efficiency and the bandwidth of an antenna are reduced due to a terminal with a metal appearance design in the prior art.
An embodiment of the present invention provides a terminal, where the terminal includes: the antenna radiating body is connected with a signal source; the terminal further comprises:
the metal shell comprises a metal frame and a metal back plate, and the metal frame is provided with at least two slots; at least one capacitive medium metal body is arranged inside the slot;
the metal back plate, the at least one capacitive dielectric metal body and the antenna radiator form a first series loop, and a first switch device and a matching device are connected in series in the first series loop.
Further, the terminal further includes: a second switching device;
one end of the second switch device is connected with the metal frame, and the other end of the second switch device is connected with the antenna radiator.
Further, the terminal further includes: an antenna tuning circuit;
one end of the antenna tuning circuit is connected with the signal source, and the other end of the antenna tuning circuit is connected with the antenna radiation body.
Furthermore, the capacitive dielectric metal body is parallel to the antenna radiator, and an overlapping area exists between a projection of the capacitive dielectric metal body on the antenna radiator and the antenna radiator.
Further, if two slots are formed on one frame of the metal frame, the antenna radiator is formed between the two slots.
Further, the terminal further includes: a third switching device;
the metal back plate and the at least one capacitive dielectric metal body form a second series loop, and the third switching device and the matching device are connected in series in the second series loop.
Further, the matching device connected in series in the series loop in which the capacitive dielectric metal body is located comprises at least one.
Further, when the number of the matching devices connected in series in the series circuit in which the capacitive dielectric metal body is located includes at least two, one end of each of the at least two matching devices is connected to the capacitive dielectric metal body, and the other end of each of the at least two matching devices is connected to the metal back plate.
Further, the matching device is a capacitor or an inductor.
An embodiment of the present invention provides a terminal, where the terminal includes: the antenna radiator, the signal terminal is connected to the antenna radiator, the terminal still includes: the metal shell comprises a metal frame and a metal back plate, and the metal frame is provided with at least one slot; at least one capacitive medium metal body is arranged inside the slot; the metal back plate, the at least one capacitive dielectric metal body and the antenna radiator form a series loop, and the first switch device and the matching device are connected in series in the series loop. In the embodiment of the invention, at least one capacitive dielectric metal body is arranged in at least one slot in the terminal, and the equivalent inductance-capacitance value formed between the antenna radiator and the capacitive dielectric metal body, the metal frame or the metal back plate is changed through different states of the capacitive dielectric metal body, so that the coverage of different frequency bands is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a terminal according to embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a specific connection structure of a terminal according to embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a terminal according to embodiment 2 of the present invention;
fig. 4 is a schematic structural diagram of a terminal according to embodiment 3 of the present invention;
fig. 5 is a schematic diagram of a terminal according to embodiment 4 of the present invention;
fig. 6 is a schematic diagram of a terminal according to embodiment 4 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
fig. 1 is a terminal provided in an embodiment of the present invention, where the terminal includes: an antenna radiator 12, wherein the antenna radiator 12 is connected to a signal source (not shown in fig. 1), a metal frame 11 and a metal back plate 10, the metal back plate 10 serves as a reference ground, and the metal frame 11 and the metal back plate 10 form a metal shell of the terminal;
the metal frame 11 is provided with at least two slots, and at least one capacitive medium metal body 13 is arranged in the at least two slots;
the metal back plate 10, the at least one capacitive dielectric metal 13, and the antenna radiator 12 form a first series loop, and a first switching device and a matching device are connected in series in the first series loop.
Specifically, the side surface of the capacitive dielectric metal body 13 is parallel to the two side cross sections of the metal frame 11 after the slit is formed, and when a first series loop is formed, one end of the at least one capacitive dielectric metal body 13 is connected to one end of a first switch device, the other end of the at least one capacitive dielectric metal body is connected to a matching device, one end of the matching device, which is not connected to the capacitive dielectric metal body 13, is connected to the metal back plate 10, and the other end of the first switch device is connected to the antenna radiator 12. Of course, the first switching device and the matching device may be placed at other positions in the first series loop, for example, the matching device and the switching device may be connected in series between the capacitive dielectric metal body 13 and the antenna radiator 12, but other positions are also possible as long as they are connected in series in the first series loop.
With the continuous development of the metal texture terminal technology, the terminal with the metal appearance design is gradually sought by consumers due to the unique texture and luster of the terminal, so the embodiment of the invention aims at the terminal with the metal appearance design, and the terminal can be a mobile phone or an interactive television and the like.
At least two slots are formed on the metal frame 11 by using a slot technology. Preferably, the metal frame 11 is slit by using a slitting technique, and specifically, a plurality of slits such as 2 slits, 3 slits, or 4 slits may be formed. For example, as shown in fig. 1, the metal frame 11 is provided with 4 slots, wherein the upper frame (upper and lower in the figure) is provided with 2 slots, and the lower frame (upper and lower in the figure) is provided with 2 slots.
Because the antenna radiator is made of metal, when there is dielectric (such as air) between two parallel metal plates, there exists an equivalent capacitance between the two metal plates, wherein the magnitude of the equivalent capacitance is related to the distance between the two metal plates and the facing area between the two metal plates. Specifically, in the embodiment of the present invention, the operating frequency band of the antenna is determined by equivalent capacitance values generated between the antenna radiator and the metal back plate 10, the metal frame 11, and/or the capacitive dielectric metal body 13, and different operating frequency bands may be determined by different equivalent capacitance values.
Fig. 2 is a schematic diagram of a specific connection structure of a terminal according to an embodiment of the present invention, specifically, a capacitive dielectric metal body 131 and a capacitive dielectric metal body 132 are disposed inside two slits of the metal frame 11, where a side surface of each capacitive dielectric metal body is parallel to two side cross sections of the metal frame 11 after the slits are formed, and the capacitive dielectric metal body may be connected to each capacitive dielectric metal body through two first switching devices, where a first switching device is connected to the capacitive dielectric metal body 131, and a second first switching device is connected to the capacitive dielectric metal body 132.
Preferably, the capacitive dielectric metal body 131 and the capacitive dielectric metal body 132 may be connected through a single-pole double-throw first switching device 14, wherein the capacitive dielectric metal body 131 is connected to a first end of the first switching device 14, the capacitive dielectric metal body 132 is connected to a second end of the first switching device 14, the other ends of the capacitive dielectric metal body 131 and the capacitive dielectric metal body 132 are connected to the matching devices C1 and C2, respectively, the ends of the matching devices C1 and C2, which are not connected to the capacitive dielectric metal body, are connected to the metal back plate 10, respectively, and the third end of the first switching device 14 is connected to the antenna radiator 12.
In order to effectively improve the bandwidth of the terminal antenna, in the embodiment of the present invention, the antenna radiator 12 is parallel to the metal back plate 10, and an overlapping area exists between the projection of the antenna radiator 12 on the metal back plate 10 and the metal back plate 10; the antenna radiator 12 is parallel to the metal frame 11, specifically, the left side surface of the antenna radiator 12 is parallel to the metal frame 11, and an overlapping area exists between a projection of the left side surface of the antenna radiator 12 on the metal frame 11 and the metal frame 11; the right side surface of the antenna radiator 12 is parallel to the metal frame 11, and an overlapping area exists between the projection of the right side surface of the antenna radiator 12 on the metal frame 11 and the metal frame 11; the side surfaces of the capacitive dielectric metal body 131 and the side surfaces of the capacitive dielectric metal body 132 are parallel to the slit cross section of the metal bezel 11. In addition, in fig. 2, there are two capacitive dielectric metal bodies, the capacitive dielectric metal body 131 is parallel to the capacitive dielectric metal body 132, and there is an overlapping area between the projection of the capacitive dielectric metal body 131 on the capacitive dielectric metal body 132 and the capacitive dielectric metal body 132.
When the first switching device 14 in fig. 2 is in an off state, that is, the third terminal of the first switching device 14 is not connected to the first terminal and the second terminal thereof, the equivalent capacitance values determining the operating frequency band of the antenna include: the equivalent capacitance value that antenna radiator 12 and metal frame 11 formed, the equivalent capacitance value that antenna radiator 12 and metal backplate 10 formed, wherein the equivalent capacitance value that antenna radiator 12 and metal frame 11 formed includes: the equivalent capacitance formed by the left side surface (left and right in the drawing) of the antenna radiator 12 and the metal frame 11, and the equivalent capacitance formed by the right side surface (left and right in the drawing) of the antenna radiator 12 and the metal frame 11.
When the first switching device 14 in fig. 2 is connected to the capacitive dielectric metal body 131, the equivalent capacitance value that changes when compared with the case where the first switching device 14 is in the off state includes: the equivalent capacitance between the antenna radiator 12 and the metal back plate 10 is the capacitance of the capacitor device C1, the equivalent capacitance generated between the left side surface 01 of the capacitive dielectric metal body 131 and the metal frame 11, and the equivalent capacitance generated between the right side surface 02 of the capacitive dielectric metal body 131 and the left side surface 01 of the capacitive dielectric metal body 132.
When the first switching device 14 in fig. 2 is connected to the capacitive dielectric metal body 132, the equivalent capacitance value that changes when compared to when the first switching device 14 is in the off state includes: the equivalent capacitance between the antenna radiator 12 and the metal back plate 10 is the capacitance of the capacitor device C2, the equivalent capacitance generated between the left side 01 of the capacitive dielectric metal body 132 and the right side 02 of the capacitive dielectric metal body 131, and the equivalent capacitance generated between the left side 01 of the capacitive dielectric metal body 132 and the metal frame 11.
In the embodiment of the invention, at least one capacitive dielectric metal body is arranged in at least two slots of the terminal, and the equivalent capacitance value generated between the antenna radiating body and the capacitive dielectric metal body, the metal frame or the metal back plate is changed through different states of the capacitive dielectric metal body, so that the coverage of different frequency bands of the antenna is realized.
Example 2:
in order to increase the operating frequency band of the antenna, on the basis of the above embodiment, in an embodiment of the present invention, the terminal further includes: a second switching device 15;
one end of the second switch device 15 is connected to the metal frame 11, and the other end of the second switch device 15 is connected to the antenna radiator 12.
Because equivalent capacitance values can be generated between the antenna radiator 12 and the metal frame 11, and between the antenna radiator 12 and the metal back plate 10, the working frequency band of the antenna can be determined according to the generated equivalent capacitance values. When the antenna radiator 12 is connected to the metal frame 11 by using the second switching device 15, the equivalent capacitance generated between the antenna radiator 12 and the metal frame 11 can be changed, and thus the operating frequency band of the antenna can be changed. Specifically, the terminal provided in the embodiment of the present invention further includes a second switch device 15, one end of the second switch device 15 is connected to the metal frame 11, and the other end of the second switch device 15 is connected to the antenna radiator 12, and the connection state between the antenna radiator 12 and the metal frame 11 can be controlled by the second switch device 15, so that the operating frequency band of the antenna can be changed.
The antenna radiator in the embodiment of the present invention may be the same as the antenna radiator in the terminal in the prior art, and in order to effectively save the space of the terminal, on the basis of the above embodiment, if one frame of the metal frame has two slots, the antenna radiator is formed between the two slots. That is, two slots or a plurality of slots may be provided on one frame of the metal frame, and the metal frame between two adjacent slots is used as the antenna radiator. Specifically, the upper frame, the lower frame, the left frame, or the right frame of the metal frame may be provided with a slit.
Fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present invention, specifically, in the terminal shown in fig. 3, the metal frame 11 has two slots, the antenna radiator 12 is formed between the two slots, and two capacitive dielectric metal bodies are respectively disposed inside each slot, specifically, as shown in fig. 3, a capacitive dielectric metal body 131 and a capacitive dielectric metal body 132 are disposed inside one of the slots, and a capacitive dielectric metal body 133 and a capacitive dielectric metal body 134 are disposed inside the other slot.
Each of the capacitive dielectric metal bodies may be connected by two first switching devices, a first of which is connected to the capacitive dielectric metal body 131 and a second of which is connected to the capacitive dielectric metal body 132. And the antenna radiator 12 and the metal bezel 11 may be connected by a second switching device.
Preferably, the capacitive dielectric metal body 131, the capacitive dielectric metal body 132 and the metal frame 11 are respectively connected through a single-pole triple-throw second switching device 15, wherein the capacitive dielectric metal body 131 is connected to a first end of the second switching device 15, the capacitive dielectric metal body 132 is connected to a second end of the second switching device, the other ends of the capacitive dielectric metal body 131 and the capacitive dielectric metal body 132 are respectively connected to matching devices C1 and C2, the metal frame 11 is connected to a third end of the second switching device 15, and a fourth end of the second switching device 15 is connected to the antenna radiator 12. Wherein, the dashed arrows in fig. 3 indicate the labels of the corresponding left side and right side of each capacitive dielectric metal body, respectively.
When the second switching device 15 in fig. 3 is in an off state, that is, the fourth terminal of the second switching device 15 is not connected to the first terminal, the second terminal, and the third terminal thereof, the equivalent capacitance values determining the operating frequency band of the antenna include: an equivalent capacitance value generated between the antenna radiator 12 and the metal back plate 10 (not shown in the drawings), an equivalent capacitance value generated between the left side surface of the antenna radiator 12 and the metal frame 11, an equivalent capacitance value generated between the left side surface of the antenna radiator 12 and the right side surface 02 of the capacitive dielectric metal body 131, and an equivalent capacitance value generated between the left side surface of the antenna radiator 12 and the right side surface 02 of the capacitive dielectric metal body 132; an equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the metal frame 11, an equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the left side surface 01 of the capacitive dielectric metal body 133, and an equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the left side surface 01 of the capacitive dielectric metal body 134.
When the second switching device 15 in fig. 3 is connected to the metal frame 11, the equivalent capacitance value that changes when the second switching device 15 is in an off state includes: there is no equivalent capacitance between the left side of the antenna radiator 12 and the metal frame 11, the equivalent capacitance generated between the left side 01 of the capacitive dielectric metal body 131 and the metal frame 11, and the equivalent capacitance generated between the left side 01 of the capacitive dielectric metal body 132 and the metal frame 11.
When the second switching device 15 in fig. 3 is connected to the capacitive dielectric metal body 131, the equivalent capacitance value that changes when compared with the case where the second switching device 15 is in the off state includes: the equivalent capacitance between the antenna radiator 12 and the metal back plate 10 is the capacitance of the capacitor device C1, the equivalent capacitance generated between the left side surface 01 of the capacitive dielectric metal body 131 and the metal frame 11, and the equivalent capacitance generated between the right side surface 02 of the capacitive dielectric metal body 131 and the left side surface 01 of the capacitive dielectric metal body 132.
When the second switching device 15 in fig. 3 is connected to the capacitive dielectric metal body 132, the equivalent capacitance value that changes when compared to when the second switching device 15 is in the off state includes: the equivalent capacitance between the antenna radiator 12 and the metal back plate 10 is the capacitance of the capacitor device C2, the equivalent capacitance generated between the left side 01 of the capacitive dielectric metal body 132 and the metal frame 11, and the equivalent capacitance generated between the left side 01 of the capacitive dielectric metal body 132 and the right side 02 of the capacitive dielectric metal body 131.
Example 3:
in order to further increase the operating frequency band of the antenna, on the basis of the above embodiments, in an embodiment of the present invention, the matching device connected in series in the first series loop in which the capacitive dielectric metal body is located includes at least one matching device.
The same effect can be achieved when a 10 farad capacitor is connected in series in the first series circuit, or when two capacitors are connected in series, both capacitors are 5 farads, so that the matching device connected in series in the first series circuit where the capacitive dielectric metal body is located may be one, two or more matching devices, or the like, in terms of connection structure.
Therefore, on the basis of the above embodiments, in the embodiment of the present invention, if at least two matching devices are connected in series in the first series circuit in which the capacitive dielectric metal body is located, one end of each of the at least two matching devices is connected to the capacitive dielectric metal body, and the other end of each of the at least two matching devices is connected to the metal back plate.
When the number of the matching devices connected in series in the first series circuit where the capacitive dielectric metal body is located includes at least two, in order to change the operating frequency band of the antenna through the capacitive dielectric metal body and the connected matching devices, it is necessary to connect one end of each of the at least two matching devices to the capacitive dielectric metal body, and connect the other end of each of the at least two matching devices to the metal back plate.
In order to effectively improve the bandwidth of the terminal antenna, on the basis of the foregoing embodiments, in an embodiment of the present invention, the capacitive dielectric metal body is parallel to the antenna radiator, and an overlapping area exists between a projection of the capacitive dielectric metal body on the antenna radiator and the antenna radiator.
When the capacitive dielectric metal body 13 is parallel to the antenna radiator 12 and there is an overlapping area between the projection of the capacitive dielectric metal body 13 on the antenna radiator 12 and the antenna radiator 12, an equivalent capacitance value is generated between the antenna radiator 12 and the metal back plate 10, between the antenna radiator 12 and the metal frame 11, and between the antenna radiator and the capacitive dielectric metal body 13, so that the working frequency band of the antenna can be effectively changed.
Fig. 4 is a schematic diagram of a terminal structure according to an embodiment of the present invention, specifically, a capacitive dielectric metal body 131 and a capacitive dielectric metal body 132 are disposed inside one of the slits of the metal frame 11, and may be respectively connected to each capacitive dielectric metal body through two first switching devices, where a first switching device is connected to the capacitive dielectric metal body 131, and a second first switching device is connected to the capacitive dielectric metal body 132.
Preferably, the first switch device 14 is connected to the capacitive dielectric metal body 131 and the capacitive dielectric metal body 132 through a single-pole double-throw, wherein the capacitive dielectric metal body 131 is connected to a first end of the first switch device 14, the capacitive dielectric metal body 132 is connected to a second end of the first switch device 14, the other end of the capacitive dielectric metal body 132 is connected to the matching devices C1 and C2, ends of the matching devices C1 and C2, which are not connected to the capacitive dielectric metal body 132, are connected to the metal back plate 10, and a third end of the first switch device 14 is connected to the antenna radiator 12. Wherein, the dashed arrows in fig. 4 respectively indicate the labels of the corresponding side surfaces of each capacitive dielectric metal body, where the capacitive dielectric metal body 131 is parallel to the antenna radiator 12, and there is an overlapping area between the projection of the capacitive dielectric metal body 131 on the antenna radiator 12 and the antenna radiator 12; the capacitive dielectric metal body 132 is parallel to the antenna radiator 12, and there is an overlapping area between the projection of the capacitive dielectric metal body 132 on the antenna radiator 12 and the antenna radiator 12.
When the first switching device 14 in fig. 4 is in an off state, that is, the third terminal of the first switching device 14 is not connected to the first terminal and the second terminal thereof, the equivalent capacitance values determining the operating frequency band of the antenna include: an equivalent capacitance value generated between the antenna radiator 12 and the metal back plate 10, an equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the metal frame 11, an equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the left side surface 04 of the capacitive dielectric metal body 131, and an equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the left side surface 04 of the capacitive dielectric metal body 132.
When the first switching device 14 in fig. 4 is connected to the capacitive dielectric metal body 131, the equivalent capacitance value determining the operating frequency band of the antenna includes: there is no equivalent capacitance value between the right side surface of the antenna radiator 12 and the left side surface 04 of the capacitive dielectric metal body 131, the equivalent capacitance value generated between the right side surface 02 of the capacitive dielectric metal body 131 and the metal frame 11, the equivalent capacitance value generated between the lower side surface 03 of the capacitive dielectric metal body 131 and the upper side surface 01 of the capacitive dielectric metal body 132, and the equivalent capacitance value generated between the antenna radiator 12 and the metal backplate 10.
When the first switching device 14 in fig. 4 is connected to the capacitive dielectric metal body 132, the equivalent capacitance value that changes when compared to the first switching device being in the off state includes: there is no equivalent capacitance value between the right side surface of the antenna radiator 12 and the left side surface 04 of the capacitive dielectric metal body 132, the equivalent capacitance value between the antenna radiator 12 and the metal back plate 10 is the capacitance values of the capacitor devices C1 and C2, the equivalent capacitance value generated between the right side surface 02 of the capacitive dielectric metal body 132 and the metal frame 11, and the equivalent capacitance value generated between the upper side surface 01 of the capacitive dielectric metal body 132 and the lower side surface 03 of the capacitive dielectric metal body 131.
Example 4:
in order to make the terminal work better, on the basis of the above embodiments, in an embodiment of the present invention, the terminal further includes: an antenna tuning circuit 17;
one end of the antenna tuning circuit 17 is connected to the signal source 16, and the other end of the antenna tuning circuit 17 is connected to the antenna radiator 12.
The signal source is used for generating and sending out signals. The antenna tuning circuit enables impedance matching between the signal source and the antenna radiator, thereby maximizing the radiated power at any frequency from the antenna radiator. Fig. 5 is a schematic diagram of a terminal according to an embodiment of the present invention, where the terminal further includes a signal source 16 and an antenna tuning circuit 17, the signal source 16 is a single in fig. 5, and the antenna tuning circuit 17 is a tunning in fig. 5, where one end of the antenna tuning circuit 17 is connected to the signal source 16, and the other end is connected to the antenna radiator 12.
In addition, when one frame of the metal frame has two slots, and the antenna radiator is formed between the two slots, in order to change the bandwidth of the terminal more conveniently, on the basis of the above embodiments, in the embodiment of the present invention, the terminal further includes a third switching device 18;
the metal back plate 10 and the at least one capacitive dielectric metal body 13 form a second series circuit, and the third switching device 18 and the matching device are connected in series in the second series circuit.
If the antenna radiator is formed between two slots on the metal frame, and at least one capacitive dielectric metal body 13 is arranged in the two slots, the side surface of the antenna radiator is parallel to the side surface of the capacitive dielectric metal body, at this time, a second series circuit can be formed by the metal back plate and the capacitive dielectric metal body, a third switching device and a matching device are connected in series in the second series circuit, and the working frequency band of the terminal is changed by changing the closing state of the third switching device.
Fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention, specifically, two capacitive dielectric metal bodies 13 are respectively disposed inside two slits of the metal frame 11 and can be respectively connected to each capacitive dielectric metal body inside one of the slits through two third switching devices 18, where a first third switching device is connected to the capacitive dielectric metal body 13 located on the left side (left and right in the drawing) in the left slit (left and right in the drawing), and a second third switching device is connected to the capacitive dielectric metal body 13 located on the right side (left and right in the drawing) in the left slit (left and right in the drawing).
Preferably, the third switching device 18 is connected to two capacitive dielectric metal bodies 13 through a single-pole double-throw, wherein the capacitive dielectric metal bodies 13 and the metal back plate form a second series circuit, the third switching device is connected in series in the second series circuit, and the matching devices are connected in series. Specifically, the second series circuit formed by the two capacitive dielectric metal bodies 13 is similar, but is different from the end connected to the single-pole double-throw third switching device 18, and for convenience, only one second series circuit is described, the capacitive dielectric metal body 13 is connected to one end of the matching device, the other end of the matching device is connected to the first end or the second end of the single-pole double-throw third switching device 18, and the third end of the third switching device 18 is connected to the metal back plate.
When the third switching device 18 in fig. 5 is in an off state, that is, the third terminal of the third switching device is not connected to the first terminal and the second terminal thereof, the equivalent capacitance value for determining the operating frequency band of the antenna includes: an equivalent capacitance value generated between the antenna radiator 12 and the metal back plate 10 (not shown in the figure), an equivalent capacitance value generated between the left side surface of the antenna radiator 12 and the metal frame 11, and an equivalent capacitance value generated between the left side surface of the antenna radiator 12 and two capacitive dielectric metal bodies 13 positioned inside the left (left and right in the figure) slots; the equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the metal frame 11, and the equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the two capacitive dielectric metal bodies 13 located inside the slits on the right side (left and right in the figure).
When the third switching device 18 in fig. 5 is connected to one of the capacitive dielectric metal bodies 13, the equivalent capacitance value that changes when compared with the case where the third switching device 18 is in the off state includes: the equivalent capacitance between the antenna radiator 12 and the metal back plate 10 is the sum of the equivalent capacitance between the left side surface of the antenna radiator 12 and the capacitive dielectric metal body 13 communicated with the third switch device and the capacitance of the capacitive device connected between the capacitive dielectric metal body 13 and the metal back plate.
In addition, the number of the matching devices connected in series in the second series circuit may be one or more, and if a plurality of matching devices are connected in series in the second series circuit, one end of each of the matching devices is connected to the capacitive dielectric metal body, and the other end of each of the matching devices is connected to the same end of the third switching device.
On the basis of the above embodiments, in the embodiments of the present invention, the matching device is a capacitor or an inductor.
The matching device connected with the other end of the capacitive dielectric metal body can be an inductive element or a capacitive element, the matching device can be a capacitor or an inductor, and when the antenna radiator is connected with the capacitive dielectric metal body through the first switch device and connected with the capacitor or the inductor, the working frequency band of the antenna can be changed.
The relationship between the working frequency band of the antenna and the equivalent capacitance generated between the antenna radiator and the metal back plate, the metal frame and/or the capacitive dielectric metal body is shown as the following formula: LC (2 pi f) ^2 ═ 1; wherein L is the equivalent inductance value of the antenna radiator itself, C is the equivalent capacitance value between the antenna radiator and the metal back plate, the metal frame and/or the capacitive dielectric metal body, and f is the working frequency band of the antenna. When the equivalent capacitance is changed, the operating frequency band is also changed accordingly. The embodiment of the invention mainly changes the working frequency band of the antenna by changing the equivalent capacitance value generated between the antenna radiating body and the metal back plate, the metal frame and/or the capacitive dielectric metal body, thereby realizing the multi-band design of the antenna.
Fig. 6 is a schematic diagram of a specific connection structure of a terminal according to an embodiment of the present invention, and a manner of implementing a multiband design of an antenna is described as follows:
specifically, two capacitive dielectric metal bodies are respectively disposed inside two slots of the metal bezel 11, wherein the capacitive dielectric metal body 131 and the capacitive dielectric metal body 132 are disposed inside the left (left and right as shown in the figure) slot, and the capacitive dielectric metal body 133 and the capacitive dielectric metal body 134 are disposed inside the right (left and right as shown in the figure) slot. The capacitive dielectric metal body 131 and the capacitive dielectric metal body 132 may be connected to a single-pole double-throw first switching device 141, respectively, where the capacitive dielectric metal body 131 is connected to a first end of the first switching device 141, the capacitive dielectric metal body 132 is connected to a second end of the first switching device 141, the other ends of the capacitive dielectric metal body 131 and the capacitive dielectric metal body 132 are connected to matching devices C1 and C2, respectively, ends of the matching devices C1 and C2, which are not connected to the capacitive dielectric metal body, are connected to the metal back plate 10, respectively, and a third end of the first switching device 141 is connected to the antenna 12; the capacitive dielectric metal body 133 and the capacitive dielectric metal body 134 are respectively connected through a single-pole double-throw first switch device 142, wherein the capacitive dielectric metal body 133 is connected with a first end of the first switch device 142, the capacitive dielectric metal body 134 is connected with a second end of the first switch device 142, the other end of the capacitive dielectric metal body 134 is connected with matching devices C1 and C2, the ends of the matching devices C1 and C2, which are not connected with the capacitive dielectric metal body 134, are respectively connected with the metal back plate 10, and a third end of the first switch device 142 is connected with the antenna radiator 12. The dotted arrows in fig. 6 indicate the labels of the corresponding side surfaces of each capacitive dielectric metal body, respectively, where the capacitive dielectric metal body 131 or the capacitive dielectric metal body 132 is not parallel to the antenna radiator 12, the capacitive dielectric metal body 133 or the capacitive dielectric metal body 134 is parallel to the antenna radiator, and there is an overlapping area between the projection of the capacitive dielectric metal body 133 or the capacitive dielectric metal body 134 on the antenna radiator 12 and the antenna radiator 12.
When the first switching devices 141 and 142 in fig. 6 are in an off state, that is, the third terminal of the first switching device 141 is not connected to the first terminal and the second terminal thereof in fig. 6, and the third terminal of the first switching device 142 is not connected to the first terminal and the second terminal thereof, the equivalent capacitance values for determining the operating frequency band of the antenna include: an equivalent capacitance value generated between the antenna radiator 12 and the metal back plate 10, an equivalent capacitance value generated between the left side surface of the antenna radiator 12 and the metal frame 11, an equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the left side surface 04 of the capacitive dielectric metal body 133, and an equivalent capacitance value generated between the right side surface of the antenna radiator 12 and the left side surface 04 of the capacitive dielectric metal body 134.
When the first switching device 141 is connected to the capacitive dielectric metal body 131 and the first switching device 142 is still in the off state in fig. 6, the equivalent capacitance value that changes when compared with the case where the first switching devices 141 and 142 are in the off state includes: the equivalent capacitance value generated between the antenna radiator 12 and the metal back plate 10 is the capacitance value of the capacitor device C1, the equivalent capacitance value generated between the left side surface 01 of the capacitive dielectric metal body 131 and the metal frame 11, and the equivalent capacitance value generated between the right side surface 02 of the capacitive dielectric metal body 131 and the left side surface 01 of the capacitive dielectric metal body 132.
When the first switching device 141 is connected to the capacitive dielectric metal body 132 and the first switching device 142 is still in the off state in fig. 6, the equivalent capacitance value that changes when compared to when the first switching devices 141 and 142 are in the off state includes: the equivalent capacitance value generated between the antenna radiator 12 and the metal back plate 10 is the capacitance value of the capacitor device C2, the equivalent capacitance value generated between the left side surface 01 of the capacitive dielectric metal body 132 and the right side surface 02 of the capacitive dielectric metal body 131, and the equivalent capacitance value generated between the left side surface 01 of the capacitive dielectric metal body 132 and the metal frame 11.
When the first switching device 142 is connected to the capacitive dielectric metal body 133 and the first switching device 141 is still in the off state in fig. 6, the equivalent capacitance value for determining the operating frequency band of the antenna includes: an equivalent capacitance value generated between the right side 02 of the capacitive dielectric metal body 133 and the metal frame 11, an equivalent capacitance value generated between the lower side 03 of the capacitive dielectric metal body 133 and the upper side 01 of the capacitive dielectric metal body 134, an equivalent capacitance value generated between the antenna radiator 12 and the metal back plate, and an equivalent capacitance value generated between the left side of the antenna radiator 12 and the metal frame 11.
When the first switching device 142 is connected to the capacitive dielectric metal body 134 and the first switching device 141 is still in the off state in fig. 6, the equivalent capacitance value that changes when compared to when the first switching devices 141 and 142 are in the off state includes: the equivalent capacitance values generated between the antenna radiator 12 and the metal back plate 10 are the capacitance values of the capacitor devices C3 and C4, the equivalent capacitance value generated between the right side 02 of the capacitive dielectric metal body 134 and the metal frame 11, and the equivalent capacitance value generated between the upper side 01 of the capacitive dielectric metal body 134 and the lower side 03 of the capacitive dielectric metal body 133.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A terminal, the terminal comprising an antenna radiator connected to a signal source, the terminal comprising:
the metal shell comprises a metal frame and a metal back plate, and the metal frame is provided with at least two slots; at least one capacitive dielectric metal body is arranged inside the slot, wherein the capacitive dielectric metal body is parallel to the antenna radiating body, and an overlapping area exists between the projection of the capacitive dielectric metal body on the antenna radiating body and the antenna radiating body;
the metal back plate, the at least one capacitive dielectric metal body and the antenna radiator form a first series loop, and a first switch device and a matching device are connected in series in the first series loop;
if one frame of the metal frame is provided with two slots, the antenna radiator is formed between the two slots.
2. The terminal of claim 1, wherein the terminal further comprises: a second switching device;
one end of the second switch device is connected with the metal frame, and the other end of the second switch device is connected with the antenna radiator.
3. The terminal of claim 1, wherein the terminal further comprises: an antenna tuning circuit;
one end of the antenna tuning circuit is connected with the signal source, and the other end of the antenna tuning circuit is connected with the antenna radiation body.
4. The terminal of claim 1, wherein the terminal further comprises: a third switching device;
the metal back plate and the at least one capacitive dielectric metal body form a second series loop, and the third switching device and the matching device are connected in series in the second series loop.
5. A termination according to claim 1 or 4, characterised in that the matching device connected in series in the series circuit in which the capacitive dielectric metal body is located comprises at least one.
6. A terminal as claimed in claim 5, wherein when the series circuit of matching devices connected in series with the capacitive dielectric metal body includes at least two matching devices, one end of each of the at least two matching devices is connected to the capacitive dielectric metal body, and the other end of each of the at least two matching devices is connected to the metal back plate.
7. The terminal of claim 5, wherein the matching device is a capacitor or an inductor.
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| CN111781250B (en) * | 2020-06-30 | 2023-07-07 | 维沃移动通信有限公司 | Electronic device and antenna detection method |
| CN113871852B (en) * | 2021-08-31 | 2022-12-20 | 荣耀终端有限公司 | Terminal antenna and mobile terminal equipment |
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