CN210040568U - Single-layer coaxial feed dual-polarization microstrip array antenna - Google Patents
Single-layer coaxial feed dual-polarization microstrip array antenna Download PDFInfo
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- CN210040568U CN210040568U CN201921371912.4U CN201921371912U CN210040568U CN 210040568 U CN210040568 U CN 210040568U CN 201921371912 U CN201921371912 U CN 201921371912U CN 210040568 U CN210040568 U CN 210040568U
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Abstract
The utility model discloses a coaxial feed double polarization microstrip array antenna of individual layer relates to antenna technical field. The array antenna comprises a microstrip dielectric plate, wherein a microstrip patch and a microstrip line are etched on the upper surface of the microstrip dielectric plate, and form a microstrip array antenna; a grounding bottom plate is fixed on the lower surface of the dielectric plate, an antenna housing is fixed on the upper side of the dielectric plate, and the antenna housing is used for covering the microstrip array antenna; the inner conductor of the coaxial feed joint is directly connected with the microstrip line from the lower surface of the grounding bottom plate through the grounding bottom plate and the microstrip medium plate. The array antenna has the advantages of high gain, low cross polarization isolation degree, high port isolation degree, dual linear polarization, circular polarization and the like.
Description
Technical Field
The utility model relates to the technical field of antennas, especially, relate to a coaxial feed double polarization microstrip array antenna of individual layer.
Background
Since the invention of radio, antennas have been an important component in wireless communications, and both transmission and reception of radio signals require antennas. The microstrip antenna has the characteristics of small volume, low section, light weight, easy processing, compatibility with an integrated circuit and the like, and is widely applied to radar and communication systems. The dual-polarized microstrip antenna can work in a receiving and transmitting duplex mode at the same time, and is beneficial to frequency reuse, so that the dual-polarized microstrip antenna gradually becomes the focus of people's attention.
The dual-polarized antenna comprises a vertical polarization mode and a horizontal polarization mode, so that the polarization mode can be changed only by adjusting the feed interface without frequently adjusting the placing mode of the antenna, and the dual-polarized antenna is relatively convenient to use. Meanwhile, the dual-polarization technology also increases the communication capacity of the antenna, and the satellite communication system also urgently needs the antenna to have dual-polarization characteristic at the present day when the frequency spectrum resources are increasingly tense. The dual-polarization microstrip antenna is researched in some articles, and because the application of the dual-polarization technology needs higher isolation, the articles mostly use multilayer feeding, so that the processing difficulty is increased while the isolation is improved.
The main performance of dual-polarized antennas requires a consideration of port isolation and cross-polarization isolation. Due to space limitation, isolation between ports of dual-polarized microstrip antennas is generally poor, polarization purity is not high, and antennas adopting various coupling feed structures and mixed structures can improve antenna performance, but when an antenna array is formed, port isolation and cross polarization isolation are not ideal due to mutual coupling between units, coupling between feed networks and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a double-line polarization and circular polarization's coaxial feed double polarization microstrip array antenna of individual layer is provided to high-gain, low cross polarization isolation, port isolation height and can realize.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a single-layer coaxial feed dual-polarization microstrip array antenna is characterized in that: the antenna comprises a microstrip dielectric plate, wherein a microstrip patch and a microstrip line are etched on the upper surface of the microstrip dielectric plate, and the microstrip patch and the microstrip line form a microstrip array antenna; a grounding bottom plate is fixed on the lower surface of the dielectric plate, an antenna housing is fixed on the upper side of the dielectric plate, and the antenna housing is used for covering the microstrip array antenna; the inner conductor of the coaxial feed joint is directly connected with the microstrip line from the lower surface of the grounding bottom plate through the grounding bottom plate and the microstrip medium plate.
The further technical scheme is as follows: the array antenna comprises a left part and a right part which are symmetrical, wherein the left half part comprises two rows of eight columns of microstrip patches, two opposite sides of the front and the back microstrip patches are connected through a phase-shifting microstrip line, the outer sides of the front and the back microstrip patches are connected through a first connecting microstrip line, each two columns of microstrip patches are taken as a group, and one phase-shifting microstrip line in each group is connected with the other phase-shifting microstrip line in the group sequentially through a first impedance regulator, a second connecting microstrip line and the other first impedance regulator; one first connecting microstrip line in each group is connected with the other first connecting microstrip line in the group sequentially through one second impedance adjuster, the third connecting microstrip line and the other second impedance adjuster; one second connecting microstrip line in the two adjacent groups is connected with the second connecting microstrip line in the other adjacent group after sequentially passing through one third impedance adjuster, one fourth connecting microstrip line, one fourth impedance adjuster, the other fourth connecting microstrip line and the other third impedance adjuster; one third connecting microstrip line in the two adjacent groups is connected with the second connecting microstrip line in the other adjacent group after sequentially passing through one fifth impedance adjuster, one fifth connecting microstrip line, one sixth impedance adjuster, the other fifth connecting microstrip line and the other fifth impedance adjuster; two adjacent fourth impedance regulators are connected through a sixth connecting microstrip line; two adjacent sixth impedance adjusters are connected through a seventh connecting microstrip line; the sixth connecting microstrip line is connected with one of the coaxial feed connectors sequentially through the seventh impedance adjuster and the eighth connecting microstrip line, and the seventh connecting microstrip line is connected with the other coaxial feed connector through the eighth impedance adjuster and the ninth connecting microstrip line.
The further technical scheme is as follows: the array antenna is 392 multiplied by 126 multiplied by 16mm in size, the microstrip patch is 9.1 multiplied by 9.1mm in size, the distance between the microstrip patches on the left side and the right side is 10.2mm, and the distance between the microstrip patches on the front side and the microstrip patches on the rear side is 11.9 mm.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: in this application the antenna only needs one deck microstrip dielectric slab, adopts coaxial feed's mode, through the symmetrical to two sets of microstrip paster array feeds of microstrip line to be provided with a plurality of impedance modulation wares on the microstrip line, can realize high isolation, the double-line polarization, greatly reduced the processing degree of difficulty and processing cost. The antenna is a dual-polarized antenna with equal phase feeding, when two ports work independently, the antenna is a linear polarized antenna, and when two ports use a 90-degree electric bridge, the antenna is a circularly polarized antenna. The antenna has the following advantages: high gain: 20 dB typical value, high flatness in the whole band; low cross polarization isolation: -30dB typical value; the port isolation is high: a typical value of 45 dB; standing waves: 1.5 typical values; the antenna may provide dual linear and circular polarization.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is an exploded schematic view of an antenna according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure diagram of an antenna according to an embodiment of the present invention;
fig. 3 is a schematic top view of a microstrip dielectric plate in the antenna according to the embodiment of the present invention;
fig. 4 is a graph illustrating a gain test of an antenna according to an embodiment of the present invention;
fig. 5 is a graph illustrating a standing wave test of an antenna according to an embodiment of the present invention;
fig. 6 is a cross polarization isolation test curve of an antenna according to an embodiment of the present invention;
fig. 7 is a port isolation curve of an antenna according to an embodiment of the present invention;
wherein: 1. a microstrip dielectric plate; 2. micro-strip paster; 3. a ground plane; 4. an antenna cover; 5. a coaxial feed connection; 6. a phase-shifting microstrip line; 7. the first connecting microstrip line; 8. a first impedance adjuster; 9. a second connecting microstrip line; 10. a second impedance adjuster; 11. a third connecting microstrip line; 12. a third impedance adjuster; 13. a fourth connecting microstrip line; 14. a fourth impedance adjuster; 15. a fifth impedance adjuster; 16. a fifth connecting microstrip line; 17. a sixth impedance adjuster; 18. a sixth connecting microstrip line; 19. a seventh connecting microstrip line; 20. a seventh impedance adjuster; 21. an eighth impedance adjuster; 22. an eighth connecting microstrip line; 23. and a ninth connection microstrip line.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1-2, the embodiment of the present invention discloses a single-layer coaxial feed dual-polarized microstrip array antenna, the operating frequency range is 9.35GHz-9.85GHz, the antenna comprises a microstrip dielectric plate 1, the upper surface of the microstrip dielectric plate 1 is etched with a microstrip patch 2 and a microstrip line, and the microstrip patch 2 and the microstrip line form a microstrip array antenna; a grounding bottom plate 3 is fixed on the lower surface of the dielectric plate, an antenna housing 4 is fixed on the upper side of the dielectric plate, and the antenna housing 4 is used for covering the microstrip array antenna; the inner conductor of the coaxial feed joint 5 is directly connected with the microstrip line from the lower surface of the grounding bottom plate 3 through the grounding bottom plate 3 and the microstrip medium plate 1. Preferably, the coaxial feed connector is fixedly connected with the grounding bottom plate through a screw.
Further, as shown in fig. 3, the array antenna includes a left part and a right part which are symmetrical, wherein the left part includes two rows and eight columns of microstrip patches 2, wherein two opposite sides of the front and rear two opposite microstrip patches 2 are connected through a phase-shifting microstrip line 6, the outer sides of the front and rear two opposite microstrip patches 2 are connected through a first connecting microstrip line 7, each two columns of microstrip patches 2 are taken as a group, and one phase-shifting microstrip line 6 in each group is connected with the other phase-shifting microstrip line 6 in the group sequentially through a first impedance adjuster 8, a second connecting microstrip line 9 and another first impedance adjuster 8; one first connecting microstrip line 7 in each group is connected with the other first connecting microstrip line 7 in the group sequentially through one second impedance adjuster 10, a third connecting microstrip line 11 and the other second impedance adjuster 10; one second connecting microstrip line 9 in the two adjacent groups is connected with the second connecting microstrip line 9 in the other adjacent group sequentially through a third impedance adjuster 12, a fourth connecting microstrip line 13, a fourth impedance adjuster 14, the other fourth connecting microstrip line 13 and the other third impedance adjuster 12; one third connecting microstrip line 11 in the two adjacent groups is connected with the second connecting microstrip line 9 in the other adjacent group sequentially through one fifth impedance adjuster 15, one fifth connecting microstrip line 16, a sixth impedance adjuster 17, the other fifth connecting microstrip line 16 and the other fifth impedance adjuster 15; two adjacent fourth impedance adjusters 14 are connected through a sixth connecting microstrip line 18; two adjacent sixth impedance adjusters 17 are connected through a seventh connecting microstrip line 19; the sixth connecting microstrip line 18 is connected to one of the coaxial feed connectors 5 sequentially via a seventh impedance adjuster 20 and an eighth connecting microstrip line 22, and the seventh connecting microstrip line 19 is connected to the other coaxial feed connector 5 via an eighth impedance adjuster 21 and a ninth connecting microstrip line 23.
In the application, the phase-shifting microstrip line 6 is in a structure like a Chinese character ji, and the phase-shifting microstrip line can enable signals to generate 180-degree phase shift. The antenna utilizes two groups of identical microstrip antenna arrays, the basic principle of the antenna is similar to that of an orthogonal polarization method, and high isolation can be achieved by utilizing coaxial feed and enabling the distance between two coaxial feed points to be 73 mm. After coaxial microstrip conversion, two groups of identical microstrip line power dividers are used for feeding to each microstrip antenna unit. And a plurality of impedance regulators are also arranged on the microstrip line, so that impedance fine tuning can be better performed to achieve higher isolation. The size of the array antenna provided by the application is 392 multiplied by 126 multiplied by 16mm, the size of the microstrip patches is 9.1 multiplied by 9.1mm, the distance between each group of microstrip patches is 10.2mm, and the distance between each group of microstrip patches is 11.9 mm.
The antenna of the present application is tested, and fig. 4 is a graph illustrating a gain test curve of the antenna according to the embodiment of the present invention; fig. 5 is a graph illustrating a standing wave test of an antenna according to an embodiment of the present invention; fig. 6 is a cross polarization isolation test curve of an antenna according to an embodiment of the present invention; fig. 7 is a port isolation curve of an antenna according to an embodiment of the present invention; the antenna has the following advantages: high gain: 20 dB typical value, high flatness in the whole band; low cross polarization isolation: -30dB typical value; the port isolation is high: a typical value of 45 dB; standing waves: 1.5 typical values; the antenna may provide dual linear and circular polarization.
Claims (3)
1. A single-layer coaxial feed dual-polarization microstrip array antenna is characterized in that: the antenna comprises a microstrip dielectric plate (1), wherein a microstrip patch (2) and a microstrip line are etched on the upper surface of the microstrip dielectric plate (1), and the microstrip patch (2) and the microstrip line form a microstrip array antenna; a grounding bottom plate (3) is fixed on the lower surface of the dielectric plate, an antenna housing (4) is fixed on the upper side of the dielectric plate, and the antenna housing (4) is used for covering the microstrip array antenna; the inner conductor of the coaxial feed joint (5) is directly connected with the microstrip line from the lower surface of the grounding bottom plate (3) through the grounding bottom plate (3) and the microstrip medium plate (1).
2. The single-layer coaxial-feed dual-polarized microstrip array antenna of claim 1 wherein: the array antenna comprises a left part and a right part which are symmetrical, wherein the left half part comprises two rows of eight columns of microstrip patches (2), two opposite sides of the front and back microstrip patches (2) are connected through a phase-shifting microstrip line (6), the outer sides of the front and back microstrip patches (2) are connected through a first connecting microstrip line (7), each two columns of microstrip patches (2) are used as a group, and one phase-shifting microstrip line (6) in each group is connected with the other phase-shifting microstrip line (6) in the group sequentially through a first impedance regulator (8), a second connecting microstrip line (9) and the other first impedance regulator (8); one first connecting microstrip line (7) in each group is connected with the other first connecting microstrip line (7) in the group sequentially through one second impedance adjuster (10), the third connecting microstrip line (11) and the other second impedance adjuster (10); one second connecting microstrip line (9) in the two adjacent groups is connected with the second connecting microstrip line (9) in the other adjacent group after sequentially passing through one third impedance adjuster (12), one fourth connecting microstrip line (13), one fourth impedance adjuster (14), the other fourth connecting microstrip line (13) and the other third impedance adjuster (12); one third connecting microstrip line (11) in the two adjacent groups is connected with the second connecting microstrip line (9) in the other adjacent group after sequentially passing through one fifth impedance regulator (15), one fifth connecting microstrip line (16), one sixth impedance regulator (17), the other fifth connecting microstrip line (16) and the other fifth impedance regulator (15); two adjacent fourth impedance regulators (14) are connected through a sixth connecting microstrip line (18); two adjacent sixth impedance regulators (17) are connected through a seventh connecting microstrip line (19); the sixth connecting microstrip line (18) is connected with one coaxial feed joint (5) through a seventh impedance regulator (20) and an eighth connecting microstrip line (22) in sequence, and the seventh connecting microstrip line (19) is connected with the other coaxial feed joint (5) through an eighth impedance regulator (21) and a ninth connecting microstrip line (23).
3. The single-layer coaxial-feed dual-polarized microstrip array antenna of claim 2 wherein: the array antenna is 392 multiplied by 126 multiplied by 16mm in size, the microstrip patch is 9.1 multiplied by 9.1mm in size, the distance between the microstrip patches on the left side and the right side is 10.2mm, and the distance between the microstrip patches on the front side and the microstrip patches on the rear side is 11.9 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921371912.4U CN210040568U (en) | 2019-08-22 | 2019-08-22 | Single-layer coaxial feed dual-polarization microstrip array antenna |
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| CN201921371912.4U CN210040568U (en) | 2019-08-22 | 2019-08-22 | Single-layer coaxial feed dual-polarization microstrip array antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525275A (en) * | 2020-05-06 | 2020-08-11 | 合肥若森智能科技有限公司 | Variable polarization luneberg lens antenna |
| WO2021168846A1 (en) * | 2020-02-28 | 2021-09-02 | 华为技术有限公司 | Radome and detection device |
| CN114122744A (en) * | 2022-01-26 | 2022-03-01 | 南京天朗防务科技有限公司 | Antenna unit power distribution method and device based on subarray division and antenna |
-
2019
- 2019-08-22 CN CN201921371912.4U patent/CN210040568U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021168846A1 (en) * | 2020-02-28 | 2021-09-02 | 华为技术有限公司 | Radome and detection device |
| CN111525275A (en) * | 2020-05-06 | 2020-08-11 | 合肥若森智能科技有限公司 | Variable polarization luneberg lens antenna |
| CN114122744A (en) * | 2022-01-26 | 2022-03-01 | 南京天朗防务科技有限公司 | Antenna unit power distribution method and device based on subarray division and antenna |
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