CN114843786A - Satellite-borne shaped double-circular-polarization horn antenna - Google Patents
Satellite-borne shaped double-circular-polarization horn antenna Download PDFInfo
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- CN114843786A CN114843786A CN202210432764.2A CN202210432764A CN114843786A CN 114843786 A CN114843786 A CN 114843786A CN 202210432764 A CN202210432764 A CN 202210432764A CN 114843786 A CN114843786 A CN 114843786A
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- circular
- horn
- cavity
- circular polarizer
- corrugated
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
- H01Q13/0208—Corrugated horns
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite 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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
- H01Q13/0241—Waveguide horns radiating a circularly polarised wave
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
Abstract
The invention relates to a satellite-borne shaped double-circular-polarization horn antenna which comprises a corrugated horn, a circular polarizer and a radio frequency connector. The radio frequency connector is arranged on the side wall of the circular polarizer and feeds the excitation signal into the circular polarizer in a probe coupling mode; the circular polarizer is formed by dividing a rectangular cavity into two parts by adopting a stepped partition plate, and a left cavity and a right cavity respectively correspond to a left circular polarized electric field and a right circular polarized electric field; the feed side of the corrugated horn is in a circular waveguide form and is integrally installed with the circular polarizer; the radiation side of the corrugated horn consists of the radiation horn and two groups of corrugated grooves with the opening angles of 90 degrees, so that the shaping of a radiation pattern is realized, and the requirement of a low-orbit satellite on a wide radiation angle is met. The whole antenna has small size, low section, novel and simple structure, good environmental adaptability and the radiation characteristics of high gain, wide beam and double circular polarization.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to the technical field of miniature dual-circular-polarization satellite-borne antennas capable of forming beams.
Background
The existing waveguide circularly polarized antennas have the problems of more antenna components, larger size, complex directional diagram shaping design, great processing difficulty and the like.
For example, in the patent "a beam forming dual circularly polarized antenna" (application number: 202010213491.3), the antenna adopts a circular polarizer in the form of an orthogonal mode coupler, and a metal diaphragm exists in a circular waveguide cavity, so that the design is complex; there is the rectangle circle transform section between circular polarizer and horn antenna, is provided with the medium cover at horn antenna radiation end face, and the top surface through the medium cover sculpture metal shaping ring realizes the figuration to the digraph, and whole antenna size is great, and the design is loaded down with trivial details, and the processing realization degree of difficulty is great.
For example, in the patent of 'a satellite-borne wide-beam corrugated horn antenna' (application number: 202011238032.7), the antenna adopts a diaphragm circular polarizer, so that the design and processing difficulty is high, the polarization form is single, and double circular polarization cannot be realized; there is also waveguide coaxial switching between the polarizer and the coaxial port, resulting in a large antenna size and a cumbersome design.
For example, in a patent of "horn antenna of a medium with dual circular polarization, wide beam and high polarization purity" (application number: 202010267402.3), polyimide is added in a radiation waveguide port of the antenna to reduce the waveguide aperture, thereby realizing the function of widening the beam. The implementation mode is simple, but the pattern shape is single, shaping of various shapes cannot be realized, and the filling medium can narrow the working bandwidth.
Disclosure of Invention
Technical problem to be solved
The technical problem solved by the invention is as follows: the problems of miniaturization, double circular polarization, directional diagram shaping and great processing difficulty caused by the directional diagram shaping of the waveguide antenna are solved.
Technical scheme
A satellite-borne shaped dual-circular-polarization horn antenna is characterized by comprising a corrugated horn, a circular polarizer and a radio frequency connector, wherein the radio frequency connector is arranged on the side wall of the circular polarizer and feeds an excitation signal into the circular polarizer in a probe coupling mode; the circular polarizer is a rectangular cavity divided into two parts by a stepped partition plate, and a left cavity and a right cavity respectively correspond to a left circular polarization electric field and a right circular polarization electric field; the feed side of the corrugated horn is in a circular waveguide form and is integrally installed with the circular polarizer; the radiation side of the corrugated horn consists of the radiation horn and two groups of corrugated grooves with the opening angles of 90 degrees, and the shaping of a radiation directional diagram is realized.
The further technical scheme of the invention is as follows: the radiation horn is higher than the corrugated groove by 0.4 lambda 0 ～0.5λ 0 Wherein λ is 0 Is the air wavelength of the corresponding frequency.
The further technical scheme of the invention is as follows: the circular polarizer comprises a rectangular cavity, a stepped partition plate and a cavity cover plate, the stepped partition plate is located in the axis direction of the rectangular cavity and divides the rectangular cavity into two parts, the left cavity and the right cavity correspond to a left-right circular polarization electric field respectively, and the cavity cover plate is installed on the upper surface of the rectangular cavity.
The further technical scheme of the invention is as follows: and the rectangular cavity is sealed by a cavity cover plate in a screw or welding mode.
The further technical scheme of the invention is as follows: the radio frequency connector is in a probe form and is arranged on the left side and the right side of the circular polarizer.
Advantageous effects
The invention provides a satellite-borne shaped double-circularly-polarized horn antenna which comprises a corrugated horn, a circular polarizer and a radio frequency connector. The radio frequency connector is arranged on the side wall of the circular polarizer and feeds the excitation signal into the circular polarizer in a probe coupling mode; the circular polarizer is formed by dividing a rectangular cavity into two parts by adopting a stepped partition plate, and a left cavity and a right cavity respectively correspond to a left circular polarized electric field and a right circular polarized electric field; the feed side of the corrugated horn is in a circular waveguide form and is integrally installed with the circular polarizer; the radiation side of the corrugated horn consists of the radiation horn and two groups of corrugated grooves with the opening angles of 90 degrees, so that the shaping of a radiation pattern is realized, and the requirement of a low-orbit satellite on a wide radiation angle is met. The whole antenna has small size, low section, novel and simple structure, good environmental adaptability and the radiation characteristics of high gain, wide beam and double circular polarization. Compared with the prior art, the method has the advantages that:
1. the corrugated horn provided by the invention consists of a radiation horn and two groups of 90-degree opening angle corrugated grooves, can realize directional diagram shaping, and has a wide beam radiation characteristic.
2. The circular polarizer provided by the invention has the advantages that the rectangular cavity is divided into two parts by adopting the stepped partition plate, the left cavity and the right cavity are respectively correspondingly polarized in a left-right rotating circle, the design is simple, and the processing difficulty is effectively reduced.
3. The corrugated horn and the circular polarizer do not need to have excessive circular moment, and the circular polarizer and the radio frequency connector do not need to have the same wave conversion, so that the size of the antenna and the processing complexity are effectively reduced.
4. The invention has the advantages of reliable fixing mode of all components, simple structure, high strength, good rigidity and strong environmental adaptability.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
Fig. 1 is a schematic view of the overall structure of the antenna of the present invention;
FIG. 2 is a schematic view of a corrugated horn according to the present invention;
FIG. 3 is a schematic diagram of the RF connector and circular polarizer;
FIG. 4 is a graph of the antenna port standing wave ratio results of the present invention;
fig. 5 is an antenna radiation pattern of the present invention.
Description of the reference numerals
1-a corrugated horn; 11-a radiation horn; 12-a corrugation trough; 2-a circular polarizer; 21-a rectangular cavity; 22-a stepped separator plate; 23-a cavity cover plate; 3-radio frequency connector.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation. In the present invention, the use of directional terms such as "inner, outer" generally refers to the inner and outer of the outline of the corresponding object, unless otherwise specified. The use of directional terms such as "up, down, left, right, front and back" generally refers to up, down, left, right, front and back of the corresponding object.
As shown in fig. 1, the present invention provides a satellite-borne shaped dual circularly polarized horn antenna, comprising:
the device comprises a corrugated horn 1, a radiation horn 11, a corrugated groove 12, a circular polarizer 2, a rectangular cavity 21, a stepped partition plate 22, a cavity cover plate 23 and a radio frequency connector 3. From top to bottom, the whole structure of the antenna is a corrugated horn 1, a circular polarizer 2 and a radio frequency connector 3 in sequence. The feed side of the corrugated horn 1 is in a circular waveguide form, and the radiation side of the corrugated horn 1 consists of a radiation horn 11 and two groups of corrugated grooves 12 with 90-degree opening angles, so that the radiation pattern is shaped; the circular polarizer 2 comprises a rectangular cavity 21, a stepped partition plate 22 and a cavity cover plate 23, wherein the stepped partition plate 22 is positioned in the axis direction of the rectangular cavity 21 and divides the rectangular cavity 21 into two parts, the left cavity and the right cavity respectively correspond to a left circular polarization electric field and a right circular polarization electric field, and the cavity cover plate 23 is arranged on the upper surface of the rectangular cavity 21 and jointly forms the circular polarizer 2; and the radio frequency connectors 3 are connectors in the form of probes, are arranged on the left side and the right side of the circular polarizer 2, and feed electric signals into the circular polarizer 2 in a coupling mode.
Further, the feed side of the corrugated horn 1 is of a circular waveguide structure, the circular polarizer 2 is of a rectangular waveguide structure, and the circular waveguide structure and the circular polarizer are directly connected and fixed; the radiation side of the corrugated horn 1 is composed of a radiation horn 11 and two groups of corrugated grooves 12 with 90-degree opening angles, and the radiation horn 11 is higher than the corrugated grooves 12 by about 0.4 lambda 0 ～0.5λ 0 (λ 0 Air wavelength at the corresponding frequency).
Furthermore, the circular polarizer 2 comprises three parts, namely a rectangular cavity 21, a stepped partition plate 22 and a cavity cover plate 23, wherein the stepped partition plate 22 is positioned in the center of the rectangular cavity 21 and is along the direction of the connecting axis of the circular polarizer 2 and the corrugated horn 1; the rectangular cavity 21 is closed by a cavity cover plate 23 in a screw or welding mode.
Furthermore, the radio frequency connector 3 is installed on the side surface of the rectangular cavity 21, and a metal probe is arranged at the tail part of the radio frequency connector 3.
The antenna in the embodiment has a simple overall structure, is composed of the corrugated horn 1, the circular polarizer 2 and the radio frequency connector 3 from top to bottom, is mounted by screws, is simple and reliable, and has directional diagram shaping and dual circular polarization radiation characteristics.
Preferably, circular moment transformation is not required between the corrugated horn 1 and the circular polarizer 2;
more preferably, the same wave conversion between the circular polarizer 2 and the radio frequency connector 3 is not required;
as shown in FIG. 2, the directional diagram shaping is realized by the different-surface structure of the radiation horn 11 and the corrugated groove 12 in the corrugated horn 1, and the radiation horn is higher than the corrugated groove by about 0.4 lambda 0 ～0.5λ 0 ；
Preferably, the number of the corrugated grooves can be increased, and the relative position relationship between the radiation horn 11 and the corrugated groove 12 can be changed, so that the shaping of various patterns of directional diagrams can be realized;
as shown in fig. 3, the rf connectors 3 are respectively installed on the side walls of the rectangular cavity 21 and respectively correspond to the left-right circular polarization.
As shown in FIG. 4, the standing wave ratio (VSWR ≦ 2.0) bandwidth of the antenna in a typical frequency band is 22%;
as shown in fig. 5, the 3dB beamwidth of the antenna at a typical frequency point is ± 65 degrees.
The working principle of the invention is as follows: the radio frequency connector 3 feeds radio frequency signals into the circular polarizer 2 to generate a left-right-handed circular polarization electric field, and then radiates electromagnetic signals into space according to specific distribution through the corrugated horn 1. The process of receiving electromagnetic waves by the antenna is the reverse of the above-described process of radiating electromagnetic waves.
Through the technical scheme, the antenna with the advantages of miniaturization, double circular polarization and directional diagram shaping is realized, the design complexity and the processing difficulty of the antenna are greatly simplified, and the antenna has good impact resistance, vibration resistance, irradiation resistance and thermal stress resistance.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, other possible combinations of the features of the present invention are not further described. The engineer can perform the specific operation according to the idea of the claims of the present invention, and naturally, a series of modifications can be made to the embodiment according to the above description. All of the above should be considered as being within the scope of the present invention.
Claims (5)
1. A satellite-borne shaped dual-circular-polarization horn antenna is characterized by comprising a corrugated horn, a circular polarizer and a radio frequency connector, wherein the radio frequency connector is arranged on the side wall of the circular polarizer and feeds an excitation signal into the circular polarizer in a probe coupling mode; the circular polarizer is characterized in that a rectangular cavity is divided into two parts by adopting a stepped partition plate, and a left cavity and a right cavity respectively correspond to a left circular polarized electric field and a right circular polarized electric field; the feed side of the corrugated horn is in a circular waveguide form and is integrally installed with the circular polarizer; the radiation side of the corrugated horn consists of the radiation horn and two groups of corrugated grooves with the opening angles of 90 degrees, and the shaping of a radiation directional diagram is realized.
2. The dual circular polarized horn antenna of claim 1 wherein the radiating horn is 0.4 λ higher than the corrugated slot 0 ～0.5λ 0 Wherein λ is 0 Is the air wavelength of the corresponding frequency.
3. The two-circular-polarization star-shaped horn antenna as claimed in claim 1, wherein the circular polarizer comprises a rectangular cavity, a stepped partition plate and a cavity cover plate, the stepped partition plate is located in the axial direction of the rectangular cavity to divide the rectangular cavity into two parts, the left and right cavities respectively correspond to the left and right circular polarization electric fields, and the cavity cover plate is mounted on the upper surface of the rectangular cavity.
4. The star-carried shaped dual-circularly polarized horn antenna as claimed in claim 3, wherein the rectangular cavity is sealed by a cavity cover plate by means of screws or welding.
5. The dual circular polarized horn antenna as claimed in claim 1, wherein the rf connectors are connectors with probe form and are installed on the left and right sides of the circular polarizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210432764.2A CN114843786A (en) | 2022-04-24 | 2022-04-24 | Satellite-borne shaped double-circular-polarization horn antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210432764.2A CN114843786A (en) | 2022-04-24 | 2022-04-24 | Satellite-borne shaped double-circular-polarization horn antenna |
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| Publication Number | Publication Date |
|---|---|
| CN114843786A true CN114843786A (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210432764.2A Pending CN114843786A (en) | 2022-04-24 | 2022-04-24 | Satellite-borne shaped double-circular-polarization horn antenna |
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| CN (1) | CN114843786A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090033579A1 (en) * | 2007-08-03 | 2009-02-05 | Lockhead Martin Corporation | Circularly polarized horn antenna |
| CN110289483A (en) * | 2019-06-17 | 2019-09-27 | 北京达顺威尔科技有限公司 | Dual-band dual-circular polarization navigation TT&C antenna feed |
| CN114361801A (en) * | 2021-12-28 | 2022-04-15 | 昆山荷兹天线微波技术有限公司 | Dual-polarized high-isolation L-band miniaturized horn antenna |
-
2022
- 2022-04-24 CN CN202210432764.2A patent/CN114843786A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090033579A1 (en) * | 2007-08-03 | 2009-02-05 | Lockhead Martin Corporation | Circularly polarized horn antenna |
| CN110289483A (en) * | 2019-06-17 | 2019-09-27 | 北京达顺威尔科技有限公司 | Dual-band dual-circular polarization navigation TT&C antenna feed |
| CN114361801A (en) * | 2021-12-28 | 2022-04-15 | 昆山荷兹天线微波技术有限公司 | Dual-polarized high-isolation L-band miniaturized horn antenna |
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