CN113097740A - Double-frequency transmitting-receiving shared double-circular polarization feed source - Google Patents
Double-frequency transmitting-receiving shared double-circular polarization feed source Download PDFInfo
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- CN113097740A CN113097740A CN202110380407.1A CN202110380407A CN113097740A CN 113097740 A CN113097740 A CN 113097740A CN 202110380407 A CN202110380407 A CN 202110380407A CN 113097740 A CN113097740 A CN 113097740A
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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
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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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
Abstract
The invention provides a dual-frequency receiving and transmitting shared dual-circular polarization feed source, which comprises: the feed source comprises a double-channel waveguide (1), a double circular polarizer (2), a square-circle gradient waveguide converter (3) and a feed source horn (4) which are sequentially connected, wherein the double-channel waveguide (1) comprises two paths of mutually independent rectangular waveguides for transmitting two paths of radio frequency signals, and the two paths of radio frequency signals are subjected to double circular polarization processing through the double circular polarizer (2) to obtain left-handed circular polarization signals and right-handed circular polarization signals; the left-hand circularly polarized signal and the right-hand circularly polarized signal sequentially pass through the square-circle gradient waveguide converter (3) and the feed source horn (4) to form an axially rotationally symmetric double-circularly polarized radiation directional diagram. According to the invention, by optimizing the combined matching design between the double circular polarizer and the feed source horn, the channel isolation and the polarization isolation of more than 35dB can be realized at the receiving and transmitting frequency point, and an axially rotationally symmetric double circular polarization primary radiation directional diagram is formed.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a dual-frequency transmitting and receiving shared dual-circular polarization feed source.
Background
The feed source is a core component of the reflector antenna, and the quality of the feed source directly influences the radiation performance of the reflector antenna. By adopting the dual-frequency receiving and transmitting shared dual-circular polarization feed source, a set of reflecting surfaces can be utilized, the receiving and transmitting functions of dual-channel radio-frequency signals can be realized, and the communication capacity of the system can be improved. Particularly for a Mars detection task, a double-frequency transceiving shared double-circular polarization feed source is adopted as a feed source of a Mars detector high-gain reflector antenna, so that the limited detector space can be more efficiently utilized, and the high-gain directional transceiving function is realized.
Because the communication distance of the Mars detection task is long, the sensitivity of a transponder matched with the detector is extremely high, and in order to reduce the interference of a transmitting channel to a receiving channel, the channel isolation degree of more than 35dB between the antenna receiving channel and the transmitting channel is required. The Mars detection task receiving channel adopts left-hand circular polarization, the transmitting channel adopts right-hand circular polarization, and in order to improve the polarization discrimination rate of a receiving and transmitting system, the feed source is required to have polarization isolation degree of more than 35 dB. The Mars detection task earth communication measurement and control data transmission system works in an X frequency band, the ratio of the receiving frequency to the transmitting frequency is 1.175, and the channel isolation and the polarization isolation of a high-gain reflector antenna feed source are required to be better than 35 dB.
Referring to the existing double circular polarization feed source design literature at present, two schemes are generally adopted for realizing double circular polarization: the first method is to use an orthogonal mode coupler to realize polarization separation, and a single circular polarizer is added between the orthogonal mode coupler and a feed source horn to realize double circular polarization; the second uses a waveguide diaphragm polarizer to achieve dual circular polarization. The double circular polarization feed source design documents of the two schemes do not have a scheme column which realizes that the double-frequency point channel isolation and the polarization isolation are superior to 35 dB. Therefore, the design of the dual-frequency transceiving shared dual-circular polarization feed source which is compact and simple in structure and has excellent channel isolation and polarization isolation characteristics is the key of the design of the high-gain reflector antenna for Mars detection.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a dual-frequency transceiving shared dual-circularly-polarized feed source.
The invention provides a dual-frequency transceiving shared dual-circularly-polarized feed source, which comprises: the feed source comprises a double-channel waveguide, a double circular polarizer, a square-circle gradient waveguide converter and a feed source horn which are connected in sequence, wherein the double-channel waveguide comprises two paths of mutually independent rectangular waveguides and is used for transmitting two paths of radio frequency signals, and the two paths of radio frequency signals are subjected to double circular polarization processing through the double circular polarizer to obtain left-handed circular polarization signals and right-handed circular polarization signals; and the left-hand circularly polarized signal and the right-hand circularly polarized signal sequentially pass through the square-circle gradient waveguide converter and the feed source horn to form an axially rotationally symmetric double-circularly polarized radiation directional diagram.
Optionally, the dual channel waveguide comprises: the waveguide structure comprises a first rectangular waveguide cavity, a second rectangular waveguide cavity, a waveguide partition plate and a circular waveguide flange, wherein the first rectangular waveguide cavity and the second rectangular waveguide cavity are the same in size, and are symmetrically distributed along the middle waveguide partition plate and used for independently transmitting two paths of radio-frequency signals.
Optionally, the first rectangular waveguide cavity and the second rectangular waveguide cavity are configured to transmit two TE10 mode linearly polarized radio frequency signals.
Optionally, the first rectangular waveguide cavity and the second rectangular waveguide cavity adopt WR112 standard rectangular waveguides; or, the first rectangular waveguide cavity and the second rectangular waveguide cavity adopt non-standard rectangular waveguides.
Optionally, the dual circular polarizer comprises: the square waveguide tuning device comprises a square waveguide cavity, a partition plate and a tuning assembly, wherein the partition plate is positioned in the square waveguide cavity and divides two ends of the square waveguide cavity into three ports; the tuning assembly is disposed at a center of four waveguide walls of the square waveguide cavity.
Optionally, the partition plate is in a step shape and located at the center of the square waveguide cavity, and the height of the partition plate is equal to the side length of the inner cavity of the square waveguide cavity.
Optionally, the three ports separated by the partition plate include: the partition board comprises a first rectangular waveguide port, a second rectangular waveguide port and a square waveguide port, wherein the first rectangular waveguide port and the second rectangular waveguide port are the same in size and are symmetrically distributed along the partition board.
Optionally, the tuning assembly comprises: the tuning screw is screwed into the double circular polarizer and is fixedly connected with the double circular polarizer through the locking nut.
Optionally, the square-to-circle tapered waveguide converter comprises: the square wave waveguide port, the round waveguide port and the round waveguide flange are arranged on the outer wall of the cavity body, wherein the section of the connecting cavity body between the square wave waveguide port and the round waveguide port is in transition according to a square-round gradient curve; and the circular waveguide flange is fixedly connected with the feed source bracket.
Optionally, the feed horn comprises: the radiating structure comprises a circular waveguide section and a corrugated radiating section, wherein the corrugated radiating section comprises at least one corrugated groove.
Compared with the prior art, the invention has the following beneficial effects:
according to the dual-frequency transceiving shared dual-circular polarization feed source provided by the invention, the functions of a traditional orthogonal film coupler and a traditional circular polarizer are combined into one by using the waveguide clapboard dual-circular polarizer, and the combined matching design between the dual-circular polarizer and the feed source horn is optimized, so that the channel isolation degree and the polarization isolation degree of more than 35dB can be simultaneously realized at transceiving frequency points, and an axially rotationally symmetric dual-circular polarization primary radiation directional diagram is formed.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural diagram of a dual-frequency transceiving shared dual circularly polarized feed source according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a dual channel waveguide provided in an embodiment of the present invention;
fig. 3(a) is a schematic perspective view of a dual circular polarizer according to an embodiment of the present invention;
FIG. 3(b) is a schematic diagram of a first cross-sectional structure of a dual circular polarizer according to an embodiment of the present invention;
FIG. 3(c) is a schematic diagram of a second cross-sectional structure of a dual circular polarizer according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a tapered waveguide switch according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional structure diagram of a feed horn according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a standing-wave ratio result of a dual-frequency transceiving shared dual circularly polarized feed source receiving channel according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a standing-wave ratio result of a dual-frequency transceiving shared dual circularly polarized feed source transmitting channel according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating the channel isolation and polarization isolation results of a dual-band transceiving dual circularly polarized feed source in a receiving frequency band according to an embodiment of the present invention;
fig. 9 is a schematic diagram of channel isolation and polarization isolation results of a dual-band transmitting/receiving shared dual circularly polarized feed source in a transmitting frequency band according to an embodiment of the present invention;
fig. 10 is a main polarization directional diagram and a cross polarization directional diagram of left-handed circularly polarized waves corresponding to a dual-frequency transceiving dual circularly polarized feed source receiving channel provided in the embodiment of the present invention;
fig. 11 is a main polarization directional diagram and a cross polarization directional diagram of right-hand circularly polarized waves corresponding to a dual-frequency transceiving dual circularly polarized feed source transmitting channel provided in the embodiment of the present invention.
In the figure:
1-a two-channel waveguide;
101-a first rectangular waveguide cavity;
102-a second rectangular waveguide cavity;
103-waveguide spacer;
104-circular waveguide flange;
2-double circular polarizers;
201-square waveguide cavity;
202-a separator;
203-a tuning component;
204-a first rectangular waveguide port;
205-a second rectangular waveguide port;
206-square waveguide port;
207-tuning screw;
208-a locking nut;
3-square-round tapered waveguide converter;
301-square wave guide port;
302-circular waveguide port;
303-circular waveguide flange;
4-a feed horn;
401-a circular waveguide segment;
402-corrugated radiating section.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a dual-frequency transceiving shared dual circularly polarized feed source provided in an embodiment of the present invention, and as shown in fig. 1, the dual-frequency transceiving shared dual circularly polarized feed source in the embodiment includes: the feed source comprises a double-channel waveguide 1, a double circular polarizer 2, a square-circle gradient waveguide converter 3 and a feed source horn 4 which are connected in sequence, wherein the double-channel waveguide 1 comprises two paths of mutually independent rectangular waveguides for transmitting two paths of radio frequency signals, and the two paths of radio frequency signals are subjected to double circular polarization processing through the double circular polarizer 2 to obtain left-handed circular polarization signals and right-handed circular polarization signals; the left-hand circularly polarized signal and the right-hand circularly polarized signal sequentially pass through the square-circle gradient waveguide converter 3 and the feed source horn 4 to form an axially rotationally symmetric double-circularly polarized radiation directional diagram.
In this embodiment, the dual-channel waveguide 1, the dual circular polarizer 2, the square-to-circle tapered waveguide converter 3, and the feed horn 4 are made of metal materials. Illustratively, an aluminum alloy may be employed.
Fig. 2 is a schematic cross-sectional view of a dual-channel waveguide provided in an embodiment of the present invention, and as shown in fig. 2, the dual-channel waveguide in the embodiment includes: the waveguide structure comprises a first rectangular waveguide cavity 101, a second rectangular waveguide cavity 102, a waveguide partition 103 and a circular waveguide flange 104, wherein the first rectangular waveguide cavity 101 and the second rectangular waveguide cavity 102 are the same in size, and the first rectangular waveguide cavity 101 and the second rectangular waveguide cavity 102 are symmetrically distributed along the middle waveguide partition 103 and are used for independently transmitting two paths of radio frequency signals.
Illustratively, in the present embodiment, the first rectangular waveguide cavity 101 and the second rectangular waveguide cavity 102 are configured to transmit two TE10 mode linearly polarized radio frequency signals, wherein the thickness of the waveguide partition board may be set to be 3 mm.
Illustratively, the first rectangular waveguide cavity 101 and the second rectangular waveguide cavity 102 may employ WR112 standard rectangular waveguides.
Illustratively, the first rectangular waveguide cavity 101 and the second rectangular waveguide cavity 102 employ non-standard rectangular waveguides. This design may reduce waveguide size and weight. For example, a rectangular waveguide size of 28.5 × 6.3mm may be set.
Illustratively, a circular waveguide flange 104 is used to secure the feed to the main reflector of the high gain reflector antenna. In particular, the length of the two-channel waveguide can be set to 100 mm.
Fig. 3(a) is a schematic perspective view of a dual circular polarizer according to an embodiment of the present invention; as shown in fig. 3(a), the dual circular polarizer in this embodiment includes: the square waveguide cavity comprises a square waveguide cavity 201, a partition plate 202 and a tuning assembly 203, wherein the partition plate 202 is positioned inside the square waveguide cavity 201, and the height of the partition plate 202 is the same as the side length of an inner cavity of the square waveguide cavity 201; the partition plate 202 divides two ends of the square waveguide cavity 201 into three ports; the tuning assembly 203 is disposed in the center of the four waveguide walls of the square waveguide cavity 201.
In this embodiment, the dual circular polarizer adopts a broadband graded waveguide partition dual circular polarizer, and is configured to implement a function of converting two linear polarized waves into a common port dual circular polarized wave.
Illustratively, the baffle 202 is in a step shape and is located at the center of the square waveguide cavity 201, and the height of the starting end of the baffle is the same as the side length of the inner cavity of the square waveguide cavity 201. The distance between the terminal of the clapboard and the end surface of the square wave guide port flange is 15 mm.
In this embodiment, the partition plate of the dual circular polarizer is in a step shape, and the thickness is linearly gradually changed and is located in the center of the square waveguide cavity. The height of the initial end of the partition board is the same as the side length of the inner cavity of the square waveguide, and the distance between the terminal end of the partition board and the square waveguide opening is 10-15 mm. Therefore, the reflection coefficient of a TE01 mode of a square waveguide port can be reduced and the feed source channel isolation and the polarization isolation can be improved by adjusting the thickness of the waveguide separator and the length and the height of each step.
FIG. 3(b) is a schematic diagram of a first cross-sectional structure of a dual circular polarizer according to an embodiment of the present invention; as shown in fig. 3(b), the three ports divided by the partition 202 include: the waveguide module comprises a first rectangular waveguide port 204, a second rectangular waveguide port 205 and a square waveguide port 206, wherein the first rectangular waveguide port 204 and the second rectangular waveguide port 205 are the same in size and are symmetrically distributed along the partition 202.
In this embodiment, the partition plate 202 is used to convert the TE10 mode of the rectangular waveguide port of the circular polarizer into two TE10 and TE01 modes of the square waveguide port, which have the same amplitude and 90 ° phase difference, so as to realize the function of converting linear polarization into dual circular polarization. Wherein the first rectangular waveguide port 204 corresponds to right hand circular polarization and the second rectangular waveguide port 205 corresponds to left hand circular polarization. Illustratively, the spacers 202 may be provided in 5 steps with a linearly increasing thickness, a starting thickness of 3mm and a final thickness of 1 mm.
FIG. 3(c) is a schematic diagram of a second cross-sectional structure of a dual circular polarizer according to an embodiment of the present invention; as shown in fig. 3(c), the tuning assembly 203 includes: a tuning screw 207 and a locking nut 208, wherein the tuning screw 207 is screwed into the dual circular polarizer 2 and is tightly connected with the dual circular polarizer 2 through the locking nut 208.
Illustratively, 4 sets of tuning elements 203 are provided at the centers of four waveguide walls of the dual circular polarizer 10mm from the square waveguide port, in order to increase the means for amplitude and phase-optimized adjustment of two orthogonal modes, the TE10 mode and the TE01 mode, of the opposite waveguide port.
Specifically, the double circular polarizer is provided with 4 groups of tuning assemblies at the centers of four waveguide walls close to a square waveguide port, and the tuning assemblies are 5-10 mm away from the square waveguide port. The tuning assembly consists of an M2 screw and a lock nut. The tuning screw is 10mm in length, and the tuning screw is screwed into the cavity of the square waveguide through adjusting the length of the tuning screw, so that the tuning screw is used for optimally adjusting the amplitude and the phase of two TE10 and TE01 modes at the port of the square waveguide. A locking nut secures the tuning screw to the polarizer.
FIG. 4 is a schematic cross-sectional view of a tapered waveguide switch according to an embodiment of the present invention; as shown in fig. 4, in the present embodiment, the square-circular waveguide converter includes: the square wave guide port 301, the round waveguide port 302 and the round waveguide flange 303, wherein the section of a connecting cavity between the square wave guide port 301 and the round waveguide port 302 is transited according to a square-round gradual change curve; the circular waveguide flange 303 is fixedly connected with the feed source bracket.
An exemplary, square-to-round tapered waveguide converter is used to implement the mode conversion function. One port of the square-circle gradual change waveguide converter is a square wave guide port, the other port of the square-circle gradual change waveguide converter is a circle waveguide port, and the section curve of the middle inner cavity is a square-circle gradual change transition curve. The length of the square-round gradual change waveguide converter is 40-50 mm.
Fig. 5 is a schematic cross-sectional structure diagram of a feed horn according to an embodiment of the present invention; as shown in fig. 5, the feed horn in this embodiment includes: a circular waveguide section 401 and a corrugated radiating section 402, the corrugated radiating section 402 comprising at least one corrugated groove.
In an exemplary embodiment, the corrugated radiation section 402 includes 5 corrugated grooves, the width of each corrugated groove is 7-8 mm, the depth of each corrugated groove is 18-19.5 mm, and the thickness of each corrugated wall is 1 mm.
In this embodiment, the feed source horn is an axial groove corrugated horn for forming an axial rotationally symmetric primary radiation pattern, and the feed source horn and the dual circular polarizer are well matched by optimizing the groove width and the groove depth of each corrugated groove.
It should be noted that, in this embodiment, the number of the corrugated grooves included in the corrugated radiation section 402, the depth of the corrugated grooves, and the thickness of the corrugated wall are not limited, and may be freely selected according to the requirement of the feed direction diagram equalization degree.
Fig. 6 and fig. 7 respectively show standing-wave ratio results of frequency bands corresponding to a receiving channel and a transmitting channel of a dual-frequency transceiving shared dual circularly polarized feed source applied to mars detection, both of which are less than 1.12.
In fig. 8, the channel isolation and polarization isolation results of a dual-frequency transceiving shared dual-circularly-polarized feed source applied to mars detection in the receiving frequency band are shown, the transceiving channel isolation at the central frequency point of the receiving frequency band is 39.1dB, and the polarization isolation is 40.3 dB;
in fig. 9, the channel isolation and polarization isolation results of a dual-frequency transceiving shared dual-circularly-polarized feed source applied to the mars detection in the transmitting frequency band are shown, the transceiving channel isolation at the central frequency point of the transmitting frequency band is 43.4dB, and the polarization isolation is 51.1 dB;
in fig. 10, the results of the main polarization pattern and the cross polarization pattern of the left-handed circular polarized wave corresponding to the dual-frequency transceiving shared dual-circular polarized feed receiving channel applied to the mars detection are shown;
in fig. 11, a main polarization pattern and a cross polarization pattern result of right-hand circularly polarized waves corresponding to a dual-frequency transceiving shared dual-circularly polarized feed source transmitting channel applied to mars detection are shown.
Referring to fig. 6 to 11, the dual-frequency transceiving shared dual-circular polarization feed source provided by the invention combines the functions of the conventional orthogonal film coupler and the conventional circular polarizer into one by using the broadband graded waveguide partition plate dual-circular polarizer, and can simultaneously realize the channel isolation degree and the polarization isolation degree of more than 35dB at transceiving frequency points without additionally adding a filter by optimizing the combined matching design between the dual-circular polarizer and the axial slot feed source horn, and meanwhile, the dual-frequency transceiving shared dual-circular polarization feed source has a compact and simple structure and is suitable for a feed source of a mars detecting transceiving shared high-gain reflector antenna.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A dual-frequency transmitting and receiving shared dual-circularly polarized feed source is characterized by comprising: the feed source comprises a double-channel waveguide (1), a double circular polarizer (2), a square-circle gradient waveguide converter (3) and a feed source horn (4) which are sequentially connected, wherein the double-channel waveguide (1) comprises two paths of mutually independent rectangular waveguides for transmitting two paths of radio frequency signals, and the two paths of radio frequency signals are subjected to double circular polarization processing through the double circular polarizer (2) to obtain left-handed circular polarization signals and right-handed circular polarization signals; the left-hand circularly polarized signal and the right-hand circularly polarized signal sequentially pass through the square-circle gradient waveguide converter (3) and the feed source horn (4) to form an axially rotationally symmetric double-circularly polarized radiation directional diagram.
2. The dual-frequency transceiving dual circular polarization feed according to claim 1, wherein the dual-channel waveguide (1) comprises: the waveguide structure comprises a first rectangular waveguide cavity (101), a second rectangular waveguide cavity (102), a waveguide partition plate (103) and a circular waveguide flange (104), wherein the first rectangular waveguide cavity (101) and the second rectangular waveguide cavity (102) are the same in size, and the first rectangular waveguide cavity (101) and the second rectangular waveguide cavity (102) are symmetrically distributed along the middle waveguide partition plate (103) and are used for independently transmitting two paths of radio-frequency signals.
3. The dual-band transceiving common dual-circularly polarized feed according to claim 2, wherein the first rectangular waveguide cavity (101) and the second rectangular waveguide cavity (102) are configured to transmit two TE10 mode linearly polarized radio frequency signals.
4. The dual-band transceiving common dual-circularly polarized feed according to claim 2, wherein the first rectangular waveguide cavity (101) and the second rectangular waveguide cavity (102) adopt a WR112 standard rectangular waveguide; alternatively, the first rectangular waveguide cavity (101) and the second rectangular waveguide cavity (102) adopt non-standard rectangular waveguides.
5. The dual-frequency transceiving shared dual circular polarization feed according to any of claims 1-4, wherein the dual circular polarizer (2) comprises: the square waveguide cavity comprises a square waveguide cavity body (201), a partition plate (202) and a tuning assembly (203), wherein the partition plate (202) is located inside the square waveguide cavity body (201), and the partition plate (202) divides two ends of the square waveguide cavity body (201) into three ports; the tuning assembly (203) is arranged in the center of four waveguide walls of the square waveguide cavity (201).
6. The dual-frequency transceiving common dual-circularly polarized feed source according to claim 5, wherein the partition plate (202) is in a step shape and is located at the center of the square waveguide cavity (201), and the height of the partition plate (202) is the same as the side length of the inner cavity of the square waveguide cavity (201).
7. The dual-band transmit-receive shared dual-circular polarization feed according to claim 5, wherein the partition (202) divides three ports into: a first rectangular waveguide port (204), a second rectangular waveguide port (205), and a square waveguide port (206), wherein the first rectangular waveguide port (204) and the second rectangular waveguide port (205) are the same size and are symmetrically distributed along the septum (202).
8. The dual-band transceiving common dual circular polarization feed of claim 5, wherein the tuning component (203) comprises: a tuning screw (207) and a locking nut (208), wherein the tuning screw (207) is screwed into the dual circular polarizer (2) and is tightly connected with the dual circular polarizer (2) through the locking nut (208).
9. The dual-frequency transceiving shared dual-circular polarization feed according to any of claims 1-4, wherein the square-to-circular tapered waveguide converter (3) comprises: the square wave guide port comprises a square wave guide port (301), a round waveguide port (302) and a round waveguide flange (303), wherein the section of a connecting cavity between the square wave guide port (301) and the round waveguide port (302) is excessive according to a square-round gradual change curve; and the circular waveguide flange (303) is fixedly connected with the feed source bracket.
10. The dual-band transceiving dual-circular polarization feed according to any of claims 1 to 4, wherein the feed horn (4) comprises: a circular waveguide section (401) and a corrugated radiation section (402), the corrugated radiation section (402) comprising at least one corrugated groove.
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| CN114205729A (en) * | 2021-12-17 | 2022-03-18 | 南京驰韵科技发展有限公司 | Processing technology of terahertz frequency band feed source loudspeaker |
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| CN114205729A (en) * | 2021-12-17 | 2022-03-18 | 南京驰韵科技发展有限公司 | Processing technology of terahertz frequency band feed source loudspeaker |
| CN114205729B (en) * | 2021-12-17 | 2023-10-27 | 南京驰韵科技发展有限公司 | Processing technology of terahertz frequency band feed source loudspeaker |
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