CN112134014B - Antenna structure, signal transceiving module and antenna structure impedance debugging method - Google Patents
Antenna structure, signal transceiving module and antenna structure impedance debugging method Download PDFInfo
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- CN112134014B CN112134014B CN201911328502.6A CN201911328502A CN112134014B CN 112134014 B CN112134014 B CN 112134014B CN 201911328502 A CN201911328502 A CN 201911328502A CN 112134014 B CN112134014 B CN 112134014B
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- antenna
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- polarized wave
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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
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
Abstract
The invention provides an antenna structure, a signal transceiving module and an antenna structure impedance debugging method, wherein the antenna structure comprises a plurality of antennas, each antenna is provided with a feed point connected with a matching circuit, and the position of the feed point on the antenna is set to ensure that a polarized wave generated by the antenna with the feed point and a polarized wave generated by the adjacent antenna are orthogonal to each other. The technical scheme of the antenna structure, the signal transceiving module and the antenna structure impedance debugging method can reduce the coupling degree between every two adjacent antennas, thereby not only improving the coupling degree of the antennas and ensuring the performance of the antennas, but also reducing the requirement on the interval between the antennas, saving the layout space of the antennas and meeting the design requirement of the appearance of a terminal product.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an antenna structure, a signal transceiver module, and an antenna structure impedance adjusting method.
Background
With the accelerated maturation of 5G communication technology standards, the pace of 5G network deployment is getting faster and faster on a global scale, and we are about to enter the 5G era. The ultra-large bandwidth, ultra-low time delay and high reliability of the 5G network can bring innovation to ten major industries such as education, medical treatment, intelligent manufacturing, Internet of vehicles and the like. On the other hand, the 5G communication technology requires a wider bandwidth than the 2G/3G/4G communication technology, which doubles the number of antennas of the end product, resulting in a worse antenna environment of the end product.
At present, the increase of the number of antennas brings difficulty to meet the requirement of the antenna isolation, and how to design the layout of the antennas so as to achieve the purpose of meeting the requirement of the number of antennas and improving the antenna isolation, which becomes a technical problem to be solved urgently in the field.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and provides an antenna structure, a signal transceiving module and an antenna structure impedance debugging method, which can meet the requirement of the number of antennas and improve the isolation of the antennas.
In order to achieve the above object, the present invention provides an antenna structure including a plurality of antennas, each of the antennas having a feeding point for connection with a matching circuit, and the feeding point being located on the antenna so that a polarized wave generated by the antenna at which the feeding point is located and a polarized wave generated by an antenna adjacent to the feeding point are orthogonal to each other.
Optionally, two adjacent antennas are a first antenna and a second antenna, respectively, where the position of the feeding point on the first antenna is set to make the TM generated by the first antenna01A mode polarized wave; the position of the feeding point on the second antenna is set to enable TM generated by the second antenna10The waves are polarized in the mode.
Optionally, the feeding point on the first antenna is located at a first position deviated to a first direction relative to the geometric center of the plane where the feeding point is located; the feed point on the second antenna is located at a second position deviated to a second direction relative to the geometric center of the plane on which the feed point is located; and the first direction and the second direction are perpendicular to each other.
Optionally, the first antenna and the second antenna are cuboids.
Optionally, two side lengths of a plane where the feeding point is located are respectively equal to the length and the width of the rectangular parallelepiped, and the first direction is perpendicular to the length direction of the plane where the feeding point is located on the first antenna; the second direction is perpendicular to a width direction of a plane where the feeding point on the second antenna is located.
Optionally, the length of a plane where the feeding point on the first antenna is located is equal to one half of a wavelength corresponding to a central frequency point of the first antenna; the length of the plane where the feeding point on the second antenna is located is equal to one half of the wavelength corresponding to the central frequency point of the second antenna.
Optionally, the antenna structure further includes a plurality of coaxial cables, a first end of each of the coaxial cables is connected to the feeding point on each of the antennas, and a second end of each of the coaxial cables is used to be connected to each of the matching circuits.
As another technical solution, the present invention further provides a signal transceiving module, including a printed circuit board, and further including a plurality of matching circuits disposed on the printed circuit board, and the antenna structure provided in the present invention, wherein each of the antennas in the antenna structure is disposed on the printed circuit board and is respectively connected to each of the matching circuits, and the matching circuits are used to adjust impedance of the antenna connected thereto.
As another technical solution, the present invention further provides an antenna structure impedance debugging method, for debugging the impedance of the antenna structure provided by the present invention, where the method includes:
configuring an initial position of the feeding point on each of the antennas;
calculating according to the initial position of the feed point to obtain the initial impedance of the antenna;
when the impedance of each antenna is the initial impedance and the resonant frequency of the antenna is not within the expected operating bandwidth range, the position of the feeding point on each antenna is adjusted from the initial position to a new position, so that the polarized wave generated by the antenna where the feeding point is located is orthogonal to the polarized wave generated by the adjacent antenna.
Optionally, the antenna is a cuboid;
when the impedance of each antenna is the initial impedance and the resonant frequency of the antenna is not within the expected operating bandwidth range, adjusting the position of the feeding point on each antenna from the initial position to a new position so that the polarized wave generated by the antenna at which the feeding point is located and the polarized wave generated by the antenna adjacent to the feeding point are orthogonal to each other, including:
when the impedance of each antenna is the initial impedance and the resonant frequency of the antenna is not within the expected working bandwidth range, adjusting the length and the width of the antenna, and adjusting the position of the feeding point on each antenna from the initial position to a new position, so that the polarized wave generated by the antenna where the feeding point is located is orthogonal to the polarized wave generated by the adjacent antenna.
The invention has the beneficial effects that:
in the technical scheme of the antenna structure, the signal transceiving module and the antenna structure impedance debugging method provided by the invention, the position of the feed point on the antenna is set, so that the polarized wave generated by the antenna where the feed point is positioned is orthogonal to the polarized wave generated by the adjacent antenna, and the coupling degree between every two adjacent antennas can be reduced, thereby not only improving the antenna coupling degree and ensuring the antenna performance, but also reducing the requirement on the interval between the antennas, saving the antenna layout space and meeting the appearance design requirement of a terminal product.
Drawings
Fig. 1 is a structural diagram of a plane where feeding points on two adjacent antennas are located in an antenna structure according to an embodiment of the present invention;
FIG. 2 is a connection diagram of a coaxial cable used in an embodiment of the present invention;
fig. 3 is a structural diagram of a signal transceiver module according to an embodiment of the present invention;
fig. 4 is a flowchart of an antenna structure impedance tuning method according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the antenna structure, the signal transceiver module and the method for adjusting the impedance of the antenna structure provided by the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, the antenna structure provided in this embodiment includes a plurality of antennas, each of the antennas has a feeding point for connecting to a matching circuit capable of adjusting the impedance of the antenna, in this embodiment, two adjacent antennas are shown as a first antenna 1 and a second antenna 2, respectively, each of which has a first feeding point 11 and a second feeding point 21, respectively, where the first feeding point 11 is connected to the first matching circuit 3; the second feeding point 21 is connected to the second matching circuit 4.
The position of each feeding point on the antenna is set so that the polarized wave generated by the antenna where the feeding point is located and the polarized wave generated by the antenna adjacent to the feeding point are orthogonal to each other. Therefore, the coupling degree between each two adjacent antennas can be reduced, so that the coupling degree of the antennas can be improved, the performance of the antennas is ensured, the requirement on the interval between the antennas is reduced, the layout space of the antennas can be saved, and the requirement on the appearance design of a terminal product is met.
In the present embodiment, the position of the first feeding point 11 on the first antenna 1 is set to TM generated by the first antenna 101A mode polarized wave; the position of the second feeding point 21 on the second antenna 2 is set such that the second antenna 2 generates a TM10The waves are polarized in the mode. TM generated by the first antenna 101The mode polarized wave and TM generated by the second antenna 210The mode polarized waves are orthogonal to each other.
Specifically, as shown in fig. 1, the first feeding point 11 on the first antenna 1 is located at a first position deviated to a first direction (the first direction is parallel to the Y direction shown in fig. 1) with respect to the geometric center of the plane on which it is located; the second feeding point 21 on the second antenna 2 is located at a second position offset to a second direction (which is parallel to the X direction shown in fig. 1) with respect to the geometric center of the plane in which it lies; and the first direction and the second direction are perpendicular to each other. By designing the first and second positions appropriately, the first antenna 1 can generate a TM01Polarized wave in mode, the second antenna 2 generating TM10The waves are polarized in the mode.
In the present embodiment, the first antenna 1 and the second antenna 2 are both cuboids, which makes it easier to design the feed point positions on two adjacent antennas. Of course, in practical applications, the first antenna 1 and the second antenna 2 may also take other shapes similar to a rectangular parallelepiped.
Alternatively, two side lengths of a plane in which the feeding points are located are equal to a length and a width of the rectangular parallelepiped (i.e., a length and a width of a shaded surface shown in fig. 1), respectively, and the first direction (i.e., a direction parallel to Y) is perpendicular to a length direction of a plane in which the first feeding point 11 on the first antenna 1 is located; the second direction (i.e., the direction parallel to X) is perpendicular to the width direction of the plane in which the second feeding point 21 on the second antenna 2 is located. By this arrangement, the impedance of the antenna can be adjusted by adjusting the length and width of the antenna.
Optionally, the length of the plane where the first feeding point 11 is located is equal to one half of the wavelength corresponding to the center frequency point of the first antenna 1; the length of the plane in which the second feeding point 21 lies is equal to one half of the wavelength corresponding to the central frequency point of the second antenna 2.
In this embodiment, the antenna structure further comprises a plurality of coaxial cables, as shown in fig. 2, a first end of a first coaxial cable 12 is connected to the first feeding point 11 on the first antenna 1, and a second end is used for connecting to the first matching circuit 3 on the printed circuit board 5; a second coaxial cable 22 has a first end connected to the second feeding point 21 on the second antenna 2 and a second end for connection to the second matching circuit 4 on the printed circuit board 5. Of course, in practical applications, the connection between the antenna and the matching circuit may be implemented in any other manner.
In summary, in the antenna structure provided in this embodiment, the position of the feeding point on the antenna is set, so that the polarized wave generated by the antenna where the feeding point is located and the polarized wave generated by the antenna adjacent to the feeding point are orthogonal to each other, and the coupling degree between each two adjacent antennas can be reduced, thereby improving the coupling degree of the antennas, ensuring the performance of the antennas, and reducing the requirement for the space between the antennas, so that the layout space of the antennas can be saved, and the requirement for the appearance design of the terminal product can be met.
As another technical solution, the present embodiment further provides a signal transceiving module, which includes a printed circuit board 5 and a plurality of matching circuits, for example, a first matching circuit 3 and a second matching circuit 4, disposed on the printed circuit board 5. The signal transceiver module further includes the above-mentioned antenna structure provided in this embodiment, and each antenna (for example, the first antenna 1 and the second antenna 2) in the antenna structure is disposed on the printed circuit board 5 and is connected to each matching circuit (for example, the first matching circuit 3 and the second matching circuit 4), respectively.
The signal transceiver module that this embodiment provided, it both can improve the antenna coupling degree through adopting the above-mentioned antenna structure that this embodiment provided, guarantees the antenna performance, has reduced the interval requirement between the antenna again to can save antenna layout space, satisfy the appearance design demand of terminal product.
As another technical solution, this embodiment further provides an antenna structure impedance tuning method, which is used to tune the impedance of the antenna structure provided in this embodiment, and as shown in fig. 4, the method includes:
Alternatively, taking the adjacent first antenna 1 and the second antenna 2 shown in fig. 1 as an example, for the first antenna 1, the initial position may be a corresponding position in the first direction (the first direction is parallel to the Y direction shown in fig. 1), that is, the first feeding point 11 is offset from the center of the set by a distance in the first direction. For the second antenna 2, the initial position may be selected in the second direction (which is parallel to the X direction shown in fig. 1), that is, in which the second feeding point 21 is offset from the center of the set by a distance.
Optionally, for the antenna in the shape of a rectangular parallelepiped, the initial length and the initial width of the antenna may also be set in step 1, so as to achieve the purpose of assisting in adjusting the impedance of the antenna.
And 2, calculating according to the initial position of the feeding point to obtain the initial impedance of the antenna.
For example, the initial impedance of the antenna may be obtained by performing impedance analysis using a network analyzer.
And 3, when the impedance of each antenna is initial impedance and the resonant frequency of the antenna is not in the expected working bandwidth range, adjusting the position of the feed point on each antenna from the initial position to a new position so as to enable the polarized wave generated by the antenna with the feed point to be orthogonal to the polarized wave generated by the adjacent antenna.
Optionally, for the antenna in the shape of a rectangular parallelepiped, the length and the width of the antenna may also be adjusted in step 3, so as to achieve the purpose of adjusting the impedance of the antenna in an auxiliary manner.
Optionally, after step 3, the method further includes:
and 4, adjusting the impedance of the antenna by using a matching circuit connected with the antenna so that the antenna can obtain better bandwidth.
It should be noted that, for each of the two adjacent antennas, each antenna performs the above steps 1 to 3, so that the polarized wave generated by the antenna at which the feeding point is located and the polarized wave generated by the antenna adjacent to the feeding point are orthogonal to each other.
In summary, in the technical scheme of the antenna structure, the signal transceiver module, and the antenna structure impedance debugging method provided in this embodiment, by setting the position of the feeding point on the antenna, the polarized wave generated by the antenna where the feeding point is located and the polarized wave generated by the antenna adjacent to the feeding point are orthogonal to each other, and the coupling degree between each two adjacent antennas can be reduced, so that the antenna coupling degree can be improved, the antenna performance can be ensured, the requirement for the interval between the antennas can be reduced, the antenna layout space can be saved, and the requirement for the appearance design of a terminal product can be met.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (8)
1. An antenna structure, characterized in that, it comprises a plurality of antennas, each antenna has a feeding point for connecting with a matching circuit, and the position of the feeding point on the antenna is set to make the polarized wave generated by the antenna where the feeding point is located and the polarized wave generated by the adjacent antenna mutually orthogonal; the two adjacent antennas are respectively a first antenna and a second antenna, wherein the position of the feeding point on the first antenna is set to enable the TM generated by the first antenna01A mode polarized wave; the position of the feeding point on the second antenna is set to enable TM generated by the second antenna10A mode polarized wave;
the feeding point on the first antenna is located at a first position deviated to a first direction relative to the geometric center of a plane where the feeding point is located; the feed point on the second antenna is located at a second position deviated to a second direction relative to the geometric center of the plane on which the feed point is located; and the first direction and the second direction are perpendicular to each other.
2. The antenna structure according to claim 1, characterized in that the first antenna and the second antenna are each a cuboid.
3. The antenna structure according to claim 2, wherein two side lengths of a plane in which the feeding point is located are equal to a length and a width of the rectangular parallelepiped, respectively, and the first direction is perpendicular to a length direction of the plane in which the feeding point is located on the first antenna; the second direction is perpendicular to a width direction of a plane where the feeding point on the second antenna is located.
4. The antenna structure according to claim 2, characterized in that the length of the plane on which the feeding point on the first antenna is located is equal to one half of the wavelength corresponding to the center frequency point of the first antenna; the length of the plane where the feeding point on the second antenna is located is equal to one half of the wavelength corresponding to the central frequency point of the second antenna.
5. The antenna structure according to any of claims 1-4, wherein the antenna structure further comprises a plurality of coaxial cables, a first end of each of the coaxial cables is connected to the feeding point of each of the antennas, and a second end of each of the coaxial cables is connected to each of the matching circuits.
6. A signal transceiving module comprising a printed circuit board, and further comprising a plurality of matching circuits disposed on the printed circuit board, and the antenna structure of any of claims 1 to 5, wherein each of the antennas of the antenna structure is disposed on the printed circuit board and is connected to each of the matching circuits, respectively, and the matching circuits are configured to adjust an impedance of the antenna connected thereto.
7. An antenna structure impedance tuning method for tuning the impedance of an antenna structure according to any of claims 1-5, the method comprising:
configuring an initial position of the feeding point on each of the antennas;
calculating according to the initial position of the feed point to obtain the initial impedance of the antenna;
when the impedance of each antenna is the initial impedance and the resonant frequency of the antenna is not within the expected operating bandwidth range, the position of the feeding point on each antenna is adjusted from the initial position to a new position, so that the polarized wave generated by the antenna where the feeding point is located is orthogonal to the polarized wave generated by the adjacent antenna.
8. The method for debugging the impedance of an antenna structure according to claim 7, wherein the antenna is a rectangular parallelepiped;
when the impedance of each antenna is the initial impedance and the resonant frequency of the antenna is not within the expected operating bandwidth range, adjusting the position of the feeding point on each antenna from the initial position to a new position so that the polarized wave generated by the antenna at which the feeding point is located and the polarized wave generated by the antenna adjacent to the feeding point are orthogonal to each other, including:
when the impedance of each antenna is the initial impedance and the resonant frequency of the antenna is not within the expected working bandwidth range, adjusting the length and the width of the antenna, and adjusting the position of the feeding point on each antenna from the initial position to a new position, so that the polarized wave generated by the antenna where the feeding point is located is orthogonal to the polarized wave generated by the adjacent antenna.
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| CN108550991A (en) * | 2018-04-18 | 2018-09-18 | 大唐终端技术有限公司 | High-isolation polarity diversity micro-strip mimo antenna and production method for intelligent terminal |
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| JP3188980B2 (en) * | 1991-12-24 | 2001-07-16 | アイシン精機株式会社 | Multi-frequency microstrip antenna |
| US20110181476A1 (en) * | 2010-01-25 | 2011-07-28 | Ari Raappana | Miniature patch antenna and methods |
| CN202058850U (en) * | 2011-05-12 | 2011-11-30 | 泰科电子(上海)有限公司 | Antenna component and mobile terminal |
| WO2016012738A1 (en) * | 2014-07-22 | 2016-01-28 | Kabushiki Kaisha Toshiba | Antenna and method of manufacturing an antenna |
| US9778368B2 (en) * | 2014-09-07 | 2017-10-03 | Trimble Inc. | Satellite navigation using side by side antennas |
| CN104900999A (en) * | 2015-05-13 | 2015-09-09 | 南京大学 | Terahertz double-frequency antenna based on integrated circuit technology |
| CN205657167U (en) * | 2016-04-20 | 2016-10-19 | 广东欧珀移动通信有限公司 | Metal casing , antenna device and mobile terminal |
| EP3510670A4 (en) * | 2016-09-08 | 2020-04-29 | CommScope Technologies LLC | High performance flat panel antennas for dual band, wide band and dual polarity operation |
| EP3529855B1 (en) * | 2016-12-08 | 2023-06-28 | Huawei Technologies Co., Ltd. | Apparatus, method and computer program for generating broadcast beams |
| CN207038708U (en) * | 2017-06-28 | 2018-02-23 | 嘉兴微感电子科技有限公司 | A kind of RFID circular polarization microstrip antennas of high-gain |
| CN109494463A (en) * | 2018-11-09 | 2019-03-19 | 榆林学院 | A kind of high-isolation mimo antenna of complementation semicircular structure |
| CN109659693B (en) * | 2018-12-12 | 2021-08-24 | 维沃移动通信有限公司 | Antenna structure and communication terminal |
| CN209561609U (en) * | 2019-04-09 | 2019-10-29 | 湖南迈克森伟电子科技有限公司 | Antenna |
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| CN108550991A (en) * | 2018-04-18 | 2018-09-18 | 大唐终端技术有限公司 | High-isolation polarity diversity micro-strip mimo antenna and production method for intelligent terminal |
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