CN112018494B - Antenna and mobile terminal - Google Patents
Antenna and mobile terminal Download PDFInfo
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- CN112018494B CN112018494B CN201910468586.7A CN201910468586A CN112018494B CN 112018494 B CN112018494 B CN 112018494B CN 201910468586 A CN201910468586 A CN 201910468586A CN 112018494 B CN112018494 B CN 112018494B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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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
- H01Q1/36—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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/28—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the amplitude
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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Abstract
The application provides an antenna and a mobile terminal, the antenna comprises a feed unit and a radiation unit, the feed unit is respectively connected with a first radiation unit and a second radiation unit which are electrically isolated through a power divider, and the power divider is used for adjusting the difference value between the maximum point of a directional diagram of the first radiation unit and the maximum point of a directional diagram of the second radiation unit to be within a set range. The first radiation unit is connected with a phase shifter, and the phase shifter is used for adjusting the directional diagram orientation of the first radiation unit, so that the maximum point of the directional diagram of the first radiation unit at least partially overlaps with the minimum point of the directional diagram of the second radiation unit, and the minimum point of the directional diagram of the first radiation unit at least partially overlaps with the maximum point of the directional diagram of the second radiation unit. When the antenna is used, the phase difference and the amplitude difference among the plurality of radiation units are changed by adjusting the power divider and the phase shifter, the reduction of the directivity of a single radiation unit is realized, the depression point of a radiation pattern is reduced, and the communication effect of the antenna is further improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to an antenna and a mobile terminal.
Background
With the development of mobile communication application, the scenes of using the mobile phone connected with Wi-Fi are more and more extensive. At the mobile terminal equipment end, how to improve Wi-Fi performance and user experience is particularly important. The radiation pattern of the Wi-Fi antenna is an important index influencing user experience, but due to the fact that the antenna layout on the mobile phone is large, the position of the Wi-Fi antenna is often limited by the structure, low directivity and a round radiation pattern are difficult to obtain, radiation is poor in certain direction angles, and user experience is influenced.
Disclosure of Invention
The application provides an antenna and a mobile terminal, which are used for improving the communication effect of the antenna and further improving the use effect of the mobile terminal.
In a first aspect, an antenna is provided, which is applied to a mobile terminal and is used for improving communication effect of the mobile terminal, and in a specific setting, the antenna includes a feeding unit and a radiating unit, wherein the feeding unit is used for transmitting signals to the radiating unit. When the feed unit is specifically arranged, the feed unit is connected with the first radiation unit and the second radiation unit, and the first radiation unit and the second radiation unit are electrically isolated. When the power divider is specifically connected, the feed unit is firstly connected with the power divider, and the power divider is respectively connected with the first radiation unit and the second radiation unit. And the power divider is used for adjusting the difference value between the maximum point of the directional diagram of the first radiation unit and the maximum point of the directional diagram of the second radiation unit to be within a set range. In addition, a phase shifter is arranged on a circuit connecting the first radiation unit and the power divider, and is used for adjusting the directional diagram orientation of the first radiation unit, so that the maximum point of the directional diagram of the first radiation unit at least partially overlaps with the minimum point of the directional diagram of the second radiation unit, and the minimum point of the directional diagram of the first radiation unit at least partially overlaps with the maximum point of the directional diagram of the second radiation unit. When the antenna is used, the phase difference and the amplitude difference among the plurality of radiation units are changed by adjusting the power divider and the phase shifter, the directivity of a single radiation unit is reduced, the depression point of a radiation directional diagram is reduced, the communication effect of the antenna is further improved, and the user experience is improved.
When electrical isolation between the radiating elements is implemented, it is possible in different ways. As in a specific embodiment, the minimum distance between the first and second radiating elements is greater than a set distance. I.e. by increasing the separation distance between different radiating elements and thereby achieving electrical isolation between the radiating elements.
In a specific setting, the length of the current path of each radiating element is between one eighth and one half of the wavelength corresponding to the working frequency band of the antenna.
When the radiation units are electrically isolated from each other by the distance, the first radiation unit and the second radiation unit may be disposed on different sidewalls of the mobile terminal. Such as the first radiating element disposed on the bottom wall or the top wall of the mobile terminal and the second radiating element disposed on the side wall of the mobile terminal. The first radiation unit and the second radiation unit are respectively arranged on two adjacent side walls of the mobile terminal. Thereby through setting up different radiating element on different lateral walls, increase the interval distance between the radiating element, guarantee its electric isolation effect.
In addition to the above-mentioned distance to realize the electrical isolation between the radiation units, other ways may also be adopted, such as electrically connecting one end of the first radiation unit and one end of the second radiation unit; one end of the first radiating unit, which is electrically connected with the second radiating unit, is grounded; the antenna further comprises a decoupling structure for decoupling the two radiating elements. The first radiation unit and the second radiation unit are electrically isolated through the decoupling structure.
When the decoupling structure is specifically arranged, the power divider is coupled and connected with the first radiation unit through a first feeder line and coupled and connected with the second radiation unit through a second feeder line; the decoupling structure comprises a metal branch, one end of the metal branch is coupled with the first feed line, and the other end of the metal branch is coupled with the second feed line. Specifically, when the metal branches are arranged, the metal branches can be of different structures, for example, the metal branches are microstrip lines, printed circuits or flexible circuits.
When the decoupling structure is adopted, the distance between the two radiation units can be relatively close, such as the two radiation units are arranged on the same side wall of the mobile terminal. The arrangement of the radiating elements of the antenna is facilitated.
When the phase shifter is specifically arranged, the phase shifter is an adjustable phase shifter, when the adjustable phase shifter is adjusted to a first setting state, the maximum point of the directional diagram of the first radiation unit coincides with the minimum point of the directional diagram of the second radiation unit, and the minimum point of the directional diagram of the first radiation unit coincides with the maximum point of the directional diagram of the second radiation unit. The phase difference of signals emitted by different radiation units can be adjusted according to requirements through the arranged adjustable phase shifter.
When the power divider is specifically arranged, the power divider is an adjustable power divider, and when the adjustable power divider is adjusted to a second setting state, a maximum point of a directional diagram of the first radiation unit is equal to a maximum point of a directional diagram of the second radiation unit.
In a second aspect, a mobile terminal is also provided, which includes a housing and the antenna of any one of the above embodiments; wherein the first and second radiating elements are disposed on a sidewall of the housing; the feed unit, the power divider and the phase shifter are arranged in the shell. When the antenna is used, the phase difference and the amplitude difference among the plurality of radiation units are changed by adjusting the power divider and the phase shifter, the directivity of a single radiation unit is reduced, the depression point of a radiation directional diagram is reduced, the communication effect of the antenna is further improved, and the user experience is improved.
Drawings
Fig. 1a is a schematic structural diagram of a mobile terminal according to an embodiment of the present application;
fig. 1b is a schematic structural diagram of an antenna provided in the present embodiment;
FIG. 1c is a schematic diagram of a prior art antenna;
fig. 2a to fig. 2c are schematic simulation diagrams of a first radiation unit according to an embodiment of the present application;
fig. 3a to fig. 3c are schematic simulation diagrams of a second radiation unit according to an embodiment of the present application;
fig. 4a to fig. 4c are schematic simulation diagrams of an antenna provided in an embodiment of the present application;
fig. 5 is another schematic structural diagram of an antenna according to an embodiment of the present application;
fig. 6a to 6c are schematic simulation diagrams of a first radiation unit according to an embodiment of the present application;
fig. 7a to 7c are schematic simulation diagrams of a second radiation unit according to an embodiment of the present application;
fig. 8a to 8c are schematic simulation diagrams of an antenna provided in an embodiment of the present application;
fig. 9 is another schematic structural diagram of an antenna according to an embodiment of the present application;
fig. 10a to 10c are schematic simulation diagrams of a first radiation unit provided in an embodiment of the present application;
fig. 11a to 11c are schematic simulation diagrams of a second radiation unit provided in an embodiment of the present application;
fig. 12a to 12c are schematic simulation diagrams of an antenna according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.
For convenience of understanding the antenna provided in the embodiment of the present application, an application scenario of the antenna is first described, where the antenna is applied to a terminal, such as a common terminal like a laptop, a tablet computer, or a mobile phone. With the development of miniaturization of a terminal, the headroom of an antenna on the terminal is made smaller and smaller, so that the embodiment of the present application provides an antenna to improve the performance of the antenna, and the following describes the antenna provided by the embodiment of the present application in detail with reference to the drawings and specific embodiments.
In the antenna provided in the embodiment of the present application, the antenna may be a different antenna, such as a Wi-Fi antenna, a LET antenna, or a GPS antenna, or another type of antenna.
Referring first to fig. 1a, in fig. 1a, the structure of a mobile terminal is shown, the terminal includes a housing, as shown in fig. 1a, the housing has a metal frame 100, a side wall 101 of the metal frame 100 has a plurality of metal segments (not shown), and gaps are formed between the metal segments, and when an antenna is disposed, the metal segments on the housing act as radiators of the antenna. As shown in fig. 1b, a specific structure of the antenna is illustrated in fig. 1 b. The antenna shown in fig. 1b includes two parts, namely a feeding element and a radiating element; the feed unit is used for feeding signals to the radiation unit to be emitted or receiving signals received by the radiation unit, and the radiation unit is used for receiving or sending signals.
When the feeding unit is specifically arranged, the feeding unit comprises a feeding point 1 and a feeder line connected with the feeding point 1, and the feeding point 1 is connected with the radiating unit through the feeder line. When the feeding unit is specifically connected to the radiating unit, as shown in fig. 1b, the feeding unit corresponds to two radiating units, namely a first radiating unit 4 and a second radiating unit 5, and the feeding point 1 is connected to the first radiating unit 4 through a first feeding line 6 and connected to the second radiating unit 5 through a second feeding line 7. It should be understood that, in the above fig. 1b, only one feeding unit corresponds to two radiation units as an example for description, but in the antenna provided in the embodiment of the present application, not only one feeding unit corresponds to two radiation units, but also different cases such as one feeding unit corresponds to three radiation units, four radiation units, or five radiation units may be adopted, and only the feeding unit needs to be connected to at least two radiation units. However, the connection mode is similar no matter the feeding unit is connected with several radiation units, and the following description will take an example in which one feeding unit is correspondingly connected with two radiation units.
When the connection is implemented, the feeding unit is connected to the first radiation unit 4 and the second radiation unit 5 through the power divider 2 as shown in fig. 1b, where the power divider 2 is used to adjust a difference between a maximum point of a directional pattern of the first radiation unit 4 and a maximum point of a directional pattern of the second radiation unit 5 to be within a set range. For example, if the maximum point of the pattern of the first radiation element 4 is too large, the power of the first radiation element 4 can be reduced by the power distribution of the power divider 2, and the maximum point of the pattern of the first radiation element 4 can be reduced, so that the maximum point of the combined pattern of the first radiation element 4 and the pattern of the second radiation element 5 can be reduced.
When the power divider 2 is specifically configured, the power divider 2 is an adjustable power divider, and power distribution of different radiation units can be adjusted according to needs through the adjustable power divider 2. When the adjustable power divider is adjusted to the second setting state, the maximum point of the directional pattern of the first radiation unit 4 is equal to the maximum point of the directional pattern of the second radiation unit 5. Furthermore, when the antenna is at different frequencies, the pattern of each radiating element is different, so that the complementary pattern can be achieved with the power ratio C1 at frequency C, but at frequency D, the power ratio C1 may not be met, and the power ratio D1 needs to be adjusted to improve the pattern.
In addition, when the power divider 2 is connected to the first radiation unit 4, the phase shifter 3 is disposed on the first radiation unit 4, so that the phases of the signals on the two radiation units are different. In use, the phase shifter 3 is configured to adjust the directional pattern of the first radiation element 4 such that a maximum point of the directional pattern of the first radiation element 4 at least partially overlaps a minimum point of the directional pattern of the second radiation element 5, and a minimum point of the directional pattern of the first radiation element 4 at least partially overlaps a maximum point of the directional pattern of the second radiation element 5.
For each individual radiating element, there is a maximum point and a minimum point in its pattern. Therefore, in the embodiment of the present application, the first radiation unit and the second radiation unit are utilized. Ideally, the maximum point of the pattern of the first radiation element 4 coincides with the minimum point of the pattern of the second radiation element 5, and the minimum point of the first radiation element 4 coincides with the maximum point of the second radiation element 5, and the pattern of the antenna is the most circular. In a specific implementation, the power divider 2 and the phase shifter 3 are used together, and it can be seen from the above description that the action of the power divider 2 adjusts the maximum point of the directional pattern of the first radiation element 4. The phase shifter 3 is arranged to adjust the directivity (which can be understood as rotation) of the pattern of the first radiation element 4 so that the maximum point and the minimum point of the pattern are as close as possible to the minimum point and the maximum point of the pattern of the second radiation element 5, thereby realizing complementation.
With reference to fig. 1b, when the feeding unit is connected to the radiating unit, first, the feeding point 1 is connected to the power divider 2 through a feeder line, the power divider 2 adopts a one-to-two power divider, and the power divider 2 is connected to one end of the radiating unit, the power divider 2 is connected to the first radiating unit 4 through a first feeder line 6, and the power divider 2 is connected to the second radiating unit 5 through a second feeder line 7. The first radiation element 4 is simply referred to as ANT1 and the second radiation element 5 is simply referred to as ANT2 for convenience of description. With continued reference to fig. 1b, when the power divider 2 is connected to the first radiation element 4, the power divider 2 is directly connected to the second radiation element 5 through the second feeder 7, and when the power divider 2 is connected to the first radiation element 4, the power divider 2 is connected to the first radiation element 4 through the first feeder 6, and the first feeder 6 is provided with a phase shifter 3, so that the phases of signals connected to the first radiation element 4 and the second radiation element 5 are different, and the radiation patterns of the plurality of first radiation elements 4 and the plurality of second radiation elements 5 are complementary by adjusting the phase shift amount of the phase shifter 3, and the resulting combined pattern has low directivity. When the phase shifter 3 is specifically provided, the phase shifter 3 may be used as the phase shifter 3 in different structures such as microstrip lines, printed circuits, or metal lines, for example, for the different phase shifters 3. In one embodiment, the phase shifter 3 is implemented by a feed line, and the length of the second feed line 7 is smaller than that of the first feed line 6, so that the signals transmitted to the first and second radiation units 4 and 5 have different phases. In addition, in addition to the phase shifter 3, an adjustable phase shifter 3 may be adopted, where the phase shifter 3 is used to adjust the direction of the maximum point and the minimum point of the directional diagram of the first radiation unit 4, so that the maximum point of the directional diagram of the first radiation unit 4 is as much as possible overlapped with the minimum point of the directional diagram of the second radiation unit 5, and the minimum point of the directional diagram of the first radiation unit 4 is as much as possible overlapped with the maximum point of the directional diagram of the second radiation unit, so as to achieve a complementary effect, thereby reducing the directivity and improving the roundness of the directional diagram. Therefore, when the adjustable phase shifter is used and the adjustable phase shifter is adjusted to the first setting state, the maximum point of the directional pattern of the first radiation element 4 coincides with the minimum point of the directional pattern of the second radiation element 5, and the minimum point of the directional pattern of the first radiation element 4 coincides with the maximum point of the directional pattern of the second radiation element 5. I.e. the phase of the signal on the first radiating element 4 can be controlled by adjusting the tuneable phase shifter 3.
When the first radiation unit 4 and the second radiation unit 5 are specifically disposed, the first radiation unit 4 and the second radiation unit 5 are disposed on the housing of the mobile terminal, or a structure on the housing of the mobile terminal may be used as the radiation unit. If the metal frame in the housing is a metal frame, the metal frame is cut into different metal sections, and the metal sections are used as the first radiation unit 4 and the second radiation unit 5. Besides the metal frame of the housing, different conductive structures such as a printed circuit, a flexible circuit, a metal wire, a metal coating, and the like can be used as the first radiating element 4 and the second radiating element 5, and the effect of transmitting or receiving signals can also be achieved. In fig. 1b, a metal frame is provided with slits to form branches as the first radiation unit 4 and the second radiation unit 5. However, it should be understood that fig. 1b is only an example, and the antenna provided in the embodiment of the present application is not limited to specific materials and specific structural forms of the first radiation unit 4 and the second radiation unit 5.
When the first radiation unit 4 and the second radiation unit 5 are specifically arranged, the length of a current path of each radiation unit (the first radiation unit 4 and the second radiation unit 5) is between one eighth and one half of a wavelength corresponding to the working frequency band of the antenna. Specifically, the wavelength may be one quarter of the wavelength corresponding to the operating frequency band of the antenna. The length of the current path refers to the distance from the open end of the metal branch of the metal frame to the lower ground. In addition, the first radiation element 4 and the second radiation element 5 are electrically isolated from each other, and the degree of electrical isolation between the first radiation element 4 and the second radiation element 5 reaches 15dB, which means that the first radiation element 4 and the second radiation element 5 are electrically isolated from each other. In the specific implementation of the electrical isolation, the electrical isolation may be implemented in different manners, as shown in fig. 1b, in the antenna shown in fig. 1b, the electrical isolation between the first radiation element 4 and the second radiation element 5 is implemented by increasing the separation distance between the two. At this time, the minimum distance L between the first radiation element 4 and the second radiation element 5 is greater than a set distance, wherein the set distance is the minimum distance that the current on the first radiation element 4 and the second radiation element 5 can break down, and the set distance is exemplarily equal to 15mm, 20mm, and 25 mm. In a specific implementation, the first radiation unit 4 and the second radiation unit 5 are disposed on two different walls of the housing, and for convenience of description, four walls of a metal frame are defined as a first side wall, a second side wall, a top wall and a bottom wall, where the first side wall is opposite to the second side wall, the top wall is opposite to the bottom wall, the first side wall is adjacent to the top wall and the bottom wall, and the second side wall is also adjacent to the top wall and the bottom wall. In fig. 1b, the first radiating element 4 is arranged on the top wall and the second radiating element 5 is arranged on the first side wall. Of course, fig. 1b is only a specific example, and it is also possible to adopt: the first radiating element 4 is arranged on the top wall, and the second radiating element 5 is arranged on the bottom wall; the first radiating element 4 is arranged on the bottom wall, and the second radiating element 5 is arranged on the first side wall or the second side wall; the first radiating element 4 is arranged on a first side wall or a second side wall and the second radiating element 5 is arranged on a top wall or a bottom wall. Of course, in addition to the first radiation unit 4 or the second radiation unit 5 being provided on different walls of the housing, the first radiation unit 4 and the second radiation unit 5 may be provided on the same wall, such as a top wall, a bottom wall, a first side wall, or a second side wall, but in any case, when the first radiation unit 4 and the second radiation unit 5 are provided, the minimum distance between the first radiation unit 4 and the second radiation unit 5 should be smaller than the set distance.
With continued reference to fig. 1b, as shown in fig. 1b, wherein the first radiating element 4 is located at the upper left corner of the housing and the second radiating element 5 is located at the side. Compared to the prior art antenna, which includes one feeding unit 10 and one radiating unit 20, and the feeding unit 10 is connected to the radiating unit 20 through a feeder line, as shown in fig. 1c, the prior art antenna has relatively high radiation pattern directivity due to position limitation, and the radiation pattern is significantly concave at some angles. The antenna which only adopts the first radiation unit 4 in the prior art is simulated, and the obtained radiation pattern is as shown in fig. 2a to 2c, and as can be seen from fig. 2a to 2c, the radiation pattern of the antenna in the prior art generates obvious depression under different frequency bands. The antenna which only adopts the second radiation unit 5 in the prior art is simulated, and the obtained radiation pattern is as shown in fig. 3a to 3c, and as can be seen from fig. 3a to 3c, the radiation pattern of the antenna in the prior art generates obvious depression under different frequency bands. As a result of simulating the antenna shown in fig. 1b of the present application, as shown in fig. 3a to 3c, the ANT1 unit and the ANT2 unit are subjected to appropriate power distribution and phase allocation and combined into one path, and the obtained radiation patterns are shown in fig. 4a to 4 c. It can be seen that in the Wi-Fi frequency band, the radiation pattern of the synthesized single antenna has the best directivity, and the concave point on the radiation pattern is obviously improved. Similarly, referring to table 1, table 1 shows the directional comparison results of the maximum and minimum points in the radiation pattern of the three antennas.
TABLE 1
Of course, besides the distance used for realizing the electrical isolation between the radiation units shown in fig. 1b, other ways may also be used, in which one end of the first radiation unit 4 and one end of the second radiation unit 5 are electrically connected; one end of the first radiating element 4 electrically connected with the second radiating element 5 is grounded; the two radiating units are integrated and are grounded in the middle; furthermore, the antenna comprises a decoupling structure 8 for decoupling the two radiating elements. As shown in fig. 5 and 9, fig. 5 and 9 show the case where the first radiation element 4 and the second radiation element 5 of the antenna are located on different sidewalls. However, the first radiating element 4 and the second radiating element 5 are connected and decoupled in the same manner.
First, referring to the structure shown in fig. 5, the first radiation unit 4 and the second radiation unit 5 shown in fig. 5 are disposed on the first side wall of the housing, and the first radiation unit 4 and the second radiation unit 5 are disposed back to back, and when disposed, the first radiation unit 4 and the second radiation unit 5 are both 1/4 wavelength (wavelength corresponding to the working frequency band of the antenna). In addition, the middle of the first radiation element 4 and the second radiation element 5 is connected to the ground through the ground line, and both ends of the first radiation element 4 and the second radiation element 5 are excited by coupling feeding, as shown in fig. 5, the power divider 2 is coupled to the first radiation element 4 and the second radiation element 5 through the first feeding line 6 and the second feeding line 7, respectively. The decoupling structure 8 comprises a metal branch, one end of the metal branch is coupled with the first power supply line 6, and the other end of the metal branch is coupled with the second power supply line 7. When the decoupling is realized, the currents of the first feeder line 6 and the second feeder line 7 are coupled to the metal branch nodes and then have opposite phases at a certain frequency, so that the currents are mutually offset to realize the improvement of the isolation. This frequency can be changed by adjusting the amount of coupling of the metal stub to the first and second power feed lines 6 and 7 and the length of the metal stub. The metal branch can be selected from different structures, such as a microstrip line, a printed circuit or a flexible circuit. With continued reference to fig. 5, the decoupling structure 8 is formed by suspended metal branches from the feeding end a to the feeding end B, so that the isolation between the two radiating elements can reach a preset value, for example 15dB, in the Wi-Fi band.
The antenna provided by the embodiment of the application is convenient to understand the improvement of the directivity of the radiation pattern. Firstly, ANT1 is adopted to radiate independently, and the radiation patterns are shown in fig. 6 a-6 c; the same radiation is carried out with ANT2 alone, with the radiation patterns shown in fig. 7 a-7 c. In the embodiment of the present application, ANT1 and ANT2 are subjected to appropriate power distribution and phase configuration and combined into one path, and the obtained radiation patterns are shown in fig. 8a to 8 c. Referring also to table 2, the directivity of the maximum and minimum points in the radiation pattern for the three cases is shown by table 2. As can be seen from table 2, in the Wi-Fi band, the radiation pattern of the antenna provided in the embodiment of the present application is optimal in directivity, and the concave point on the radiation pattern is improved.
TABLE 2
Referring to fig. 9, the configuration shown in fig. 9 and the configuration shown in fig. 5 are only the arrangement positions of the first radiation unit 4 and the second radiation unit 5 are changed, and the other configurations are not changed. Firstly, ANT1 is adopted to radiate independently, and the radiation patterns are shown in fig. 10 a-10 c; the same radiation pattern is shown in fig. 11a to 11c with ANT2 radiating alone. In the embodiment of the present application, ANT1 and ANT2 are subjected to appropriate power distribution and phase configuration and combined into one path, and the obtained radiation patterns are shown in fig. 12a to 12 c. Referring also to table 3, the directivity of the maximum and minimum points in the radiation pattern for the three cases is shown by table 3. As can be seen from table 3, in the Wi-Fi band, the radiation pattern of the antenna provided in the embodiment of the present application is optimal in directivity, and the concave point on the radiation pattern is improved.
TABLE 3
It should be understood that, in the above embodiment, only one feeding unit corresponds to two radiation units as an example for description, but in the antenna provided in the embodiment of the present application, not only one feeding unit corresponds to two radiation units, but also one feeding unit corresponds to three radiation units, four radiation units, or five radiation units, and the like, which are different, only the isolation between the radiation units that are arranged needs to be ensured, and meanwhile, in the actual use process, the circularity and directivity of the antenna are adjusted by adjusting the power distribution of the power divider 2 and the phase of the signal input into each radiation unit, and the effect of improving the antenna performance can be achieved. Therefore, in the antenna provided in the embodiment of the present application, it is satisfied that the feed unit is connected to at least two radiation units, the feed unit is first connected to one power divider 2, each output end of the power divider 2 is correspondingly connected to one radiation unit, and when the power divider 2 is connected to a radiation unit, a phase shifter 3 is disposed on a circuit connecting at least one radiation unit and the power divider 2, so that phases of signals emitted by different radiation units are different. When the antenna is used, the phase difference and the amplitude difference among the plurality of radiation units are changed by adjusting the power divider 2 and the phase shifter 3, the directivity of a single radiation unit is reduced, the depression point of a radiation pattern is reduced, the communication effect of the antenna is further improved, and the user experience is improved.
In addition, the embodiment of the application also provides a mobile terminal, which can be a common mobile terminal such as a mobile phone, a tablet computer or a notebook computer, and comprises a shell and any one of the antennas; the first radiation unit and the second radiation unit are arranged on the side wall of the shell; the feed unit, power divider 2 and phase shifter 3 are disposed in the housing. When the antenna is used, the phase difference and the amplitude difference among the plurality of radiation units are changed by adjusting the power divider 2 and the phase shifter 3, the directivity of a single radiation unit is reduced, the depression point of a radiation pattern is reduced, the communication effect of the antenna is further improved, and the user experience is improved.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (12)
1. An antenna applied to a mobile terminal, the antenna comprising: the power divider comprises a feed unit, a power divider connected with the feed unit, a first radiation unit and a second radiation unit which are respectively connected with the power divider, wherein any two radiation units are electrically isolated; wherein the content of the first and second substances,
the power divider is used for adjusting the difference value between the maximum point of the directional diagram of the first radiation unit and the maximum point of the directional diagram of the second radiation unit to be within a set range;
a phase shifter is arranged on a circuit connected with the power divider, and is used for adjusting the directional diagram of the first radiation unit and enabling the maximum point of the directional diagram of the first radiation unit to at least partially overlap with the minimum point of the directional diagram of the second radiation unit, and the minimum point of the directional diagram of the first radiation unit and the maximum point of the directional diagram of the second radiation unit to at least partially overlap, so that the radiation directional diagrams of the first radiation unit and the second radiation unit are complementary.
2. The antenna of claim 1, wherein the minimum distance between the first and second radiating elements is greater than a set distance.
3. The antenna of claim 1 or 2, wherein the current path length of each radiating element is between one eighth and one half of the wavelength corresponding to the operating band of the antenna.
4. The antenna of claim 2 or 3, wherein the first radiating element and the second radiating element are respectively disposed on different sidewalls of the mobile terminal.
5. The antenna of claim 4, wherein the first radiating element and the second radiating element are respectively disposed on two adjacent sidewalls of the mobile terminal.
6. The antenna of claim 1, wherein one end of the first radiating element and one end of the second radiating element are electrically connected; one end of the first radiating unit, which is electrically connected with the second radiating unit, is grounded;
the antenna further comprises a decoupling structure for decoupling the first and second radiating elements.
7. The antenna of claim 6, wherein the power divider is coupled to the first radiating element through a first feeding line and coupled to the second radiating element through a second feeding line;
the decoupling structure comprises a metal branch, one end of the metal branch is coupled with the first feed line, and the other end of the metal branch is coupled with the second feed line.
8. The antenna of claim 7, wherein the metal stub is a microstrip line, a printed circuit, or a flexible circuit.
9. The antenna of claim 6, wherein the two radiating elements are disposed on a same sidewall of the mobile terminal.
10. The antenna according to any one of claims 1 to 9, wherein the phase shifter is a tunable phase shifter, and when the tunable phase shifter is adjusted to a first setting, a maximum point of the pattern of the first radiation element coincides with a minimum point of the pattern of the second radiation element, and a minimum point of the pattern of the first radiation element coincides with a maximum point of the pattern of the second radiation element.
11. The antenna according to any one of claims 1 to 10, wherein the power divider is an adjustable power divider, and when the adjustable power divider is adjusted to a second setting state, a maximum point of a pattern of the first radiation element is equal to a maximum point of a pattern of the second radiation element.
12. A mobile terminal, characterized in that it comprises a housing and an antenna according to any of claims 1 to 11; wherein the content of the first and second substances,
the first radiation unit and the second radiation unit are arranged on the side wall of the shell; the feed unit, the power divider and the phase shifter are arranged in the shell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910468586.7A CN112018494B (en) | 2019-05-31 | 2019-05-31 | Antenna and mobile terminal |
| PCT/CN2020/092752 WO2020238996A1 (en) | 2019-05-31 | 2020-05-28 | Antenna and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910468586.7A CN112018494B (en) | 2019-05-31 | 2019-05-31 | Antenna and mobile terminal |
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| CN112018494B true CN112018494B (en) | 2022-02-25 |
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| CN114284695B (en) * | 2020-09-28 | 2023-07-07 | 华为技术有限公司 | Antenna unit and communication device |
| CN115084854A (en) * | 2021-03-16 | 2022-09-20 | 华为技术有限公司 | Antenna and communication equipment |
| CN115693093A (en) * | 2021-07-29 | 2023-02-03 | Oppo广东移动通信有限公司 | Antenna device and electronic apparatus |
| CN114142228A (en) * | 2021-12-31 | 2022-03-04 | 维沃移动通信有限公司 | Antenna structure and electronic device |
| CN114824761B (en) * | 2022-05-16 | 2024-02-27 | Oppo广东移动通信有限公司 | Antenna device and electronic equipment |
| WO2024076148A1 (en) * | 2022-10-04 | 2024-04-11 | 삼성전자주식회사 | Electronic device including conductive portions of housing operating as antenna |
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| CN1381080A (en) * | 2000-03-23 | 2002-11-20 | 皇家菲利浦电子有限公司 | Antenna diversity arrangement |
| CN1922759A (en) * | 2004-02-25 | 2007-02-28 | 皇家飞利浦电子股份有限公司 | Antenna array |
| CN208522080U (en) * | 2018-05-03 | 2019-02-19 | 明泰科技股份有限公司 | The antenna structure of low wiring path |
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| KR100948257B1 (en) * | 2007-09-20 | 2010-03-18 | 한국전자통신연구원 | Phase Correction Apparatus of Phased Array Antennas and its Method |
| CN102509901B (en) * | 2011-11-16 | 2013-11-20 | 广州市埃特斯通讯设备有限公司 | Phased-array antenna applied to ETC (Electronic Toll Collection) system and application method thereof |
| WO2015189846A1 (en) * | 2014-06-10 | 2015-12-17 | Tag & Find Wireless Solutions Ltd. | Rfid reader and antenna system for locating items using a mobile device |
| CN107196684B (en) * | 2017-03-27 | 2020-11-06 | 上海华为技术有限公司 | Antenna system, signal processing system and signal processing method |
| US10770791B2 (en) * | 2018-03-02 | 2020-09-08 | Pc-Tel, Inc. | Systems and methods for reducing signal radiation in an unwanted direction |
| CN108832250B (en) * | 2018-06-22 | 2021-07-09 | 瑞声科技（南京）有限公司 | Antenna assembly and mobile terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1381080A (en) * | 2000-03-23 | 2002-11-20 | 皇家菲利浦电子有限公司 | Antenna diversity arrangement |
| CN1922759A (en) * | 2004-02-25 | 2007-02-28 | 皇家飞利浦电子股份有限公司 | Antenna array |
| CN208522080U (en) * | 2018-05-03 | 2019-02-19 | 明泰科技股份有限公司 | The antenna structure of low wiring path |
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| WO2020238996A1 (en) | 2020-12-03 |
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