A dual-frequency dual-polarization reflector antenna

Abstract

This utility model discloses a dual-band dual-polarization reflector antenna, relating to the field of reflector antenna technology. It includes a main reflector, a dual-band feed at the top of the main reflector, a secondary reflector mounting bracket at the top of the dual-band feed, a secondary reflector fixedly mounted at the top of the secondary reflector mounting bracket, and a mounting plate fixedly mounted at the bottom of the main reflector. The main and secondary reflectors are coaxially mounted. A polarization rotary motor is fixedly mounted at the bottom of the mounting plate, and a polarization adjustment bearing is fixedly mounted at the center of the bottom of the mounting plate. A polarization adjustment gear is fixedly mounted on the outer wall of the polarization adjustment bearing. This utility model, through an integrated dual-band feed and common-aperture reflector design incorporating a radiating horn, a Ku-coaxial waveguide, and a Ka-dielectric radiator, allows a single antenna to simultaneously support Ku / Ka dual-band dual-polarization signal transmission and reception, avoiding the deployment of multiple independent antenna systems.

Description

Technical Field

[0001] This utility model relates to the field of reflector antenna technology, specifically to a dual-frequency dual-polarized reflector antenna. Background Technology

[0002] With the development of satellite communication technology, the Ka band is increasingly widely used due to its high bandwidth characteristics, while the Ku band technology is mature and stable. To improve communication capacity, dual-polarization technology has become mainstream. In high-end applications such as shipborne and vehicle-mounted platforms, a single antenna often needs to support dual-band dual-polarization operation in both Ku and Ka bands to achieve common aperture, lightweight design, and high reliability. The existing technologies have the following problems:

[0003] Traditional solutions require separate deployment of Ku-band and Ka-band antennas, or the use of multiple independent feed systems. This not only occupies a large amount of space and increases the mechanical load on the platform, but also leads to high installation complexity and soaring costs due to the difficulty in coordinating multiple terminals, making it difficult to meet the compactness and mobility requirements of mobile communication platforms. At the same time, existing Ka-band dual-polarized antennas mostly rely on mechanical polarization rotation mechanisms or discrete feed networks, which have slow switching speeds, high power consumption, and are prone to wear and tear on mechanical parts, resulting in insufficient long-term stability and making it difficult to achieve fast and accurate polarization switching. Utility Model Content

[0004] This invention provides a dual-frequency dual-polarized reflector antenna to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A dual-frequency, dual-polarization reflector antenna includes a main reflector, a dual-frequency feed at the top of the main reflector, a secondary reflector mounting bracket at the top of the dual-frequency feed, a secondary reflector fixedly mounted at the top of the secondary reflector mounting bracket, and a mounting plate fixedly mounted at the bottom of the main reflector. The main reflector and the secondary reflector are coaxially mounted. A polarization rotation motor is fixedly mounted at the bottom of the mounting plate, and a polarization adjustment bearing is fixedly mounted at the center of the bottom of the mounting plate. A polarization adjustment gear is fixedly mounted on the outer wall of the polarization adjustment bearing. The output shaft of the motor is meshed with a polarization adjustment gear. A limiter is provided on one side of the polarization adjustment gear. The limiter is fixedly installed at the bottom of the mounting plate to limit the rotation range of the polarization adjustment gear. The bottom of the mounting plate is provided with a Ku transmit feed waveguide, a Ku receive feed waveguide, a Ka transmit feed waveguide, and a Ka receive feed waveguide. All of the Ku transmit feed waveguide, Ku receive feed waveguide, Ka transmit feed waveguide, and Ka receive feed waveguide are connected to a dual-frequency feed source. A Ka polarization switching switch is provided at the top of the Ka transmit feed waveguide.

[0007] A further improvement of this utility model's technical solution lies in the following: the dual-frequency feed includes a Ka left-hand rotary channel power divider, a Ka right-hand rotary channel power divider is fixedly installed on one side of the Ka left-hand rotary channel power divider, a Ka circular polarizer is fixedly installed at the top of the Ka left-hand rotary channel power divider, a Ka transition circular waveguide is fixedly installed at the top of the Ka circular polarizer, a Ka dual-frequency rotary joint is fixedly installed at the top of the Ka dual-frequency rotary joint, a Ka dual-frequency waveguide is fixedly installed at the top of the Ka dual-frequency waveguide, a Ku dual-frequency dual-polarization fed coaxial waveguide is fixedly installed at the top of the Ku dual-frequency dual-polarization fed coaxial waveguide, a dual-frequency radiating corrugated horn is fixedly installed at the top of the Ku dual-frequency dual-polarization fed coaxial waveguide, and a Ka dielectric radiator is provided on the inner side of the dual-frequency radiating corrugated horn.

[0008] A further improvement of this utility model is that: a Ku transmitting waveguide and a Ku receiving waveguide are fixedly installed at the bottom eccentric position of the Ku dual-frequency dual-polarized fed coaxial waveguide; a Ku transmitting waveguide power divider is fixedly installed at the bottom of the Ku transmitting waveguide; a Ku receiving waveguide power divider is fixedly installed at the bottom of the Ku receiving waveguide; a Ku receiving transition waveguide is fixedly installed at the bottom of the Ku receiving waveguide power divider; a Ka right-hand circular channel power divider is fixedly installed at the bottom of the Ku receiving transition waveguide; and a Ku transmitting transition waveguide is fixedly installed at the bottom of the Ku transmitting waveguide power divider.

[0009] A further improvement of the present invention is that: feed mounting cylinders are provided on both the left and right sides of the Ku dual-frequency dual-polarization fed coaxial waveguide, and the two feed mounting cylinders are respectively located on the outside of the Ku transmitting subwaveguide and the Ku receiving subwaveguide.

[0010] A further improvement of this utility model is that: the ka receiving feed waveguide includes a ka blocking filter and two ka receiving connecting waveguides; a left-hand rotating channel connecting waveguide is fixedly installed at the bottom of the ka left-hand rotating channel power divider; a right-hand rotating channel connecting waveguide is fixedly installed on one side of the ka right-hand rotating channel power divider; and the right-hand rotating channel connecting waveguide is located above the left-hand rotating channel connecting waveguide.

[0011] A further improvement of this utility model is that: a Ku transmitting connecting waveguide is fixedly installed at the bottom end of the left-hand channel connecting waveguide, a Ku rotating joint is fixedly installed at the bottom of the Ku transmitting connecting waveguide, and the Ku receiving feeding waveguide includes a Ku receiving connecting waveguide and a Ku blocking / transmitting filter.

[0012] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0013] 1. This utility model provides a dual-frequency dual-polarization reflector antenna. By integrating a radiating horn, a Ku coaxial waveguide, a Ka dielectric radiator, and other components into a single dual-frequency feed and a common-aperture reflector design, a single antenna can simultaneously support Ku / Ka dual-band dual-polarization signal transmission and reception, avoiding the deployment of multiple independent antenna systems.

[0014] 2. This utility model provides a dual-frequency dual-polarization reflector antenna, which achieves millisecond-level electrical switching of Ka-band left / right circular polarization through a combination of Ka polarization switching switch, Ka circular polarizer, Ka right-hand circular channel power divider, and Ka left-hand circular channel power divider, replacing the traditional mechanical rotation mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a bottom view of the structure of this utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the main reflective surface and the mounting plate of the present invention.

[0018] Figure 4 This is a partial cross-sectional schematic diagram of the dual-frequency feed source structure of this utility model;

[0019] Figure 5 This is a partially enlarged schematic diagram of the bottom of the structure of this utility model.

[0020] In the diagram: 1. Primary reflector; 2. Secondary reflector; 3. Secondary reflector mounting bracket; 4. Dual-frequency feed; 5. Ku transmit feed waveguide; 6. Ku receive feed waveguide; 7. Ka transmit feed waveguide; 8. Ka receive feed waveguide; 9. Ka polarization switching switch; 10. Polarization rotary motor; 11. Mounting plate; 12. Polarization adjustment bearing; 13. Limiter; 14. Polarization adjustment gear; 15. Dual-frequency radiating corrugated horn; 16. Ku dual-frequency dual-polarization feed coaxial waveguide; 17. Ku transmit splitter waveguide; 18. Ku receive splitter waveguide; 19. Ku transmit waveguide power divider; 20. Ku receive waveguide. 21. Power divider; 22. Ku transmit transition waveguide; 23. Ku receive transition waveguide; 24. Ka dielectric radiator; 25. Ka dual-frequency waveguide; 26. Ka dual-frequency rotary joint; 27. Ka transition circular waveguide; 28. Ka circular polarizer; 29. ​​Ka right-hand rotary channel power divider; 30. Ka left-hand rotary channel power divider; 31. Left-hand rotary channel connecting waveguide; 32. Feed mounting cylinder; 33. Ku transmit connecting waveguide; 34. Ku rotary joint; 35. Ku receive connecting waveguide; 36. Ku cut-off / transmit filter; 37. Ka receive connecting waveguide; 38. Ka cut-off / transmit filter. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model provides a dual-frequency dual-polarization reflector antenna, including a main reflector 1, a dual-frequency feed 4 on the top of the main reflector 1, a secondary reflector mounting bracket 3 on the top of the dual-frequency feed 4, a secondary reflector 2 fixedly mounted on the top of the secondary reflector mounting bracket 3, a mounting plate 11 fixedly mounted on the bottom of the main reflector 1, the main reflector 1 and the secondary reflector 2 being coaxially mounted, a polarization rotation motor 10 fixedly mounted on the bottom of the mounting plate 11, a polarization adjustment bearing 12 fixedly mounted at the center of the bottom of the mounting plate 11, and a polarization adjustment gear 14 fixedly mounted on the outer wall of the polarization adjustment bearing 12. The output shaft of the motor 10 is meshed with the polarization adjustment gear 14 for transmission. A limiter 13 is provided on one side of the polarization adjustment gear 14. The limiter 13 is fixedly installed at the bottom of the mounting plate 11 to limit the rotation range of the polarization adjustment gear 14. The bottom of the mounting plate 11 is provided with a ku transmitting feed waveguide 5, a ku receiving feed waveguide 6, a ka transmitting feed waveguide 7, and a ka receiving feed waveguide 8. The ku transmitting feed waveguide 5, the ku receiving feed waveguide 6, the ka transmitting feed waveguide 7, and the ka receiving feed waveguide 8 are all connected to the dual-frequency feed source 4. A ka polarization switching switch 9 is provided on the top of the ka transmitting feed waveguide 7.

[0023] The polarization rotary motor 10 drives the polarization adjustment gear 14, thereby controlling the rotation of the dual-frequency feed 4 to rotate the transmission polarization mode to the required direction. The limiter 13 constrains the rotation range. The feeding system is equipped with independent waveguides: ku transmission feed waveguide 5, ku receiving feed waveguide 6, ka transmission feed waveguide 7, and ka receiving feed waveguide 8, all of which are connected to the dual-frequency feed 4.

[0024] like Figure 4 , Figure 5As shown, the dual-frequency feed 4 includes a ka left-hand circular channel power divider 30. A ka right-hand circular channel power divider 28 is fixedly installed on one side of the ka left-hand circular channel power divider 30. A ka circular polarizer 27 is fixedly installed at the top of the ka left-hand circular channel power divider 30. A ka transition circular waveguide 26 is fixedly installed at the top of the ka transition circular waveguide 26. A ka dual-frequency rotary joint 25 is fixedly installed at the top of the ka dual-frequency rotary joint 25. A ka dual-frequency waveguide 24 is fixedly installed at the top of the ka dual-frequency waveguide 24. A ku dual-frequency... A dual-polarized fed coaxial waveguide 16 is provided. A dual-frequency radiating corrugated horn 15 is fixedly installed at the top of the Ku dual-frequency dual-polarized fed coaxial waveguide 16. A Ka dielectric radiator 23 is provided inside the dual-frequency radiating corrugated horn 15. A Ku transmitting waveguide 17 and a Ku receiving waveguide 18 are fixedly installed at the eccentric position at the bottom of the Ku dual-frequency dual-polarized fed coaxial waveguide 16. A Ku transmitting waveguide power divider 19 is fixedly installed at the bottom of the Ku transmitting waveguide 17. A Ku receiving waveguide power divider 20 is fixedly installed at the bottom of the Ku receiving waveguide 18. A Ku receiving transition waveguide 22 is fixedly installed at the bottom of the receiving waveguide power divider 20. A Ka right-hand channel power divider 28 is fixedly installed at the bottom of the Ku receiving transition waveguide 22. A Ku transmitting transition waveguide 21 is fixedly installed at the bottom of the Ku transmitting waveguide power divider 19. Feed mounting cylinders 32 are provided on both sides of the Ku dual-frequency dual-polarization fed coaxial waveguide 16. The two feed mounting cylinders 32 are located outside the Ku transmitting split waveguide 17 and the Ku receiving split waveguide 18, respectively. The Ka receiving fed waveguide 8 includes a Ka blocking / transmitting filter 38 and two Ka... The receiving connection waveguide 37, the bottom end of the Ka left-hand channel power divider 30 is fixedly installed with a left-hand channel connection waveguide 31, the side of the Ka right-hand channel power divider 28 is fixedly installed with a right-hand channel connection waveguide 29, the right-hand channel connection waveguide 29 is located above the left-hand channel connection waveguide 31, the bottom end of the left-hand channel connection waveguide 31 is fixedly installed with a Ku transmitting connection waveguide 33, the bottom of the Ku transmitting connection waveguide 33 is fixedly installed with a Ku rotating joint 34, the Ku receiving feed waveguide 6 includes a Ku receiving connection waveguide 35 and a Ku blocking / transmitting filter 36;

[0025] When the Ku-band is transmitting, the Ku-band transmission signal transmitted by the power amplifier is transmitted to the Ku-band transmission transition waveguide 21 through the Ku-band transmission feed waveguide 5, and then split into two paths by the Ku-band transmission waveguide power divider 19 and fed into the Ku-band transmission split waveguide 17. Then it enters the Ku-band dual-frequency dual-polarization feed coaxial waveguide 16, and after being combined, it enters the dual-frequency radiating corrugated horn 15, and with the cooperation of the main reflector 1 and the secondary reflector 2, it radiates electromagnetic waves into space in a directional manner.

[0026] When the Ku-band receiver is in operation, the Ku-band electromagnetic wave signal transmitted from space enters the dual-frequency radiating corrugated horn 15 under the focusing of the main reflector 1 and the secondary reflector 2, and then is transmitted to the Ku dual-frequency dual-polarized feed coaxial waveguide 16, where it is split into two signals and fed into the Ku receiving waveguide 18 respectively. The signals are then combined into one signal by the Ku receiving waveguide power divider 20, and then pass through the impedance transformation of the Ku receiving transition waveguide 22, the filtering of the Ku rotating joint 34, and the transmission of the Ku transmitting connection waveguide 33 before finally entering the receiving system.

[0027] When the Ka-band transmission is in operation, the Ka-band transmission signal transmitted from the power amplifier first enters the Ka transmission feed waveguide 7 for impedance transformation, then enters the Ka polarization switching switch 9, and is switched to the required left-hand or right-hand circular polarization channel. After passing through the left-hand channel connecting waveguide 31 or the right-hand channel connecting waveguide 29, it enters the Ka left-hand channel power divider 30 or the Ka right-hand channel power divider 28. Then, it is converted into the corresponding left-hand or right-hand circular polarization electromagnetic wave by the Ka circular polarizer 27. Then, it passes through the Ka transition circular waveguide 26, the Ka dual-frequency rotary joint 25, and the Ka dual-frequency waveguide 24 in sequence, and finally feeds into the Ka dielectric radiator 23. With the cooperation of the dual-frequency radiating corrugated horn 15, the main reflector 1, and the secondary reflector 2, the electromagnetic wave is radiated directionally into space. The Ka dual-frequency rotary joint 25 ensures the continuous transmission of the Ka-band transmission signal during the rotation process.

[0028] When the Ka-band receiver is in operation, the Ka-band transmitted signal radiated from free space is focused at the Ka dielectric radiator 23 by the combined action of the dual-frequency radiating corrugated horn 15, the primary reflector 1, and the secondary reflector 2. The electromagnetic field forms an in-phase superimposed electromagnetic wave at this point and feeds it into the Ka dual-frequency waveguide 24. Then, it passes through the Ka dual-frequency rotary joint 25, the Ka transition circular waveguide 26, and the Ka circular polarizer 27 in sequence, and is converted into a linearly polarized wave. When the received signal is a right-handed electromagnetic wave, it enters the Ka right-handed channel power divider 28 after passing through the Ka circular polarizer 27. When the received signal is a left-handed electromagnetic wave, it enters the Ka left-handed channel power divider 30 after passing through the Ka circular polarizer 27. Finally, under the control of the Ka polarization switching switch 9, it enters the Ku receiving feed waveguide 6. After filtering and impedance transformation by the Ku receiving feed waveguide 6, it finally enters the receiver system, thus completing the reception of the Ka electromagnetic signal.

[0029] The working principle of this dual-frequency dual-polarized reflector antenna will be explained in detail below.

[0030] like Figure 1-5As shown, the dual-frequency feed 4 is mounted at the focal point of the main reflector via mounting plate 11 and polarization adjustment bearing 12. Its rotation angle is controlled by polarization adjustment gear 14 driven by polarization rotary motor 10, and the rotation range is constrained by limiter 13. The dual-frequency radiating corrugated horn 15 simultaneously transmits and receives Ku / Ka signals. The Ku dual-frequency dual-polarization fed coaxial waveguide 16 is branched: the transmitting branch is sequentially connected to the Ku transmitting waveguide, Ku transmitting waveguide power divider 19, and Ku transmitting transition waveguide 21; the receiving branch is sequentially connected to the Ku receiving waveguide 18, Ku receiving waveguide power divider 20, and Ku receiving transition waveguide 22; the Ka signal... The signal is transmitted and received by the Ka dielectric radiator 23, and transmitted to the Ka circular polarizer 27 via the Ka dual-frequency waveguide 24, the Ka dual-frequency rotary joint 25, and the Ka transition circular waveguide 26. The Ka circular polarizer 27 is connected to the left / right circular dual channels. The left / right circular dual channels are the Ka left circular channel power divider 30 plus the left circular channel connected to the waveguide 31, and the Ka right circular channel power divider 28 plus the right circular channel connected to the waveguide 29. The Ka polarization switching switch 9 electrically controls the selection of the left or right circular channel to realize polarization switching. The Ku rotary joint 34 and the Ka dual-frequency rotary joint 25 respectively ensure the continuous transmission of Ku / Ka signals when the feed rotates.

[0031] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A dual-frequency dual-polarized reflector antenna comprising a main reflector (1), characterized in that: A dual-frequency feed (4) is provided on the top of the main reflector (1), a secondary reflector mounting bracket (3) is provided on the top of the dual-frequency feed (4), a secondary reflector (2) is fixedly mounted on the top of the secondary reflector mounting bracket (3), a mounting plate (11) is fixedly mounted on the bottom of the main reflector (1), the main reflector (1) and the secondary reflector (2) are coaxially mounted, a polarization rotary motor (10) is fixedly mounted on the bottom of the mounting plate (11), a polarization adjustment bearing (12) is fixedly mounted at the center of the bottom of the mounting plate (11), a polarization adjustment gear (14) is fixedly mounted on the outer wall of the polarization adjustment bearing (12), and the output shaft of the polarization rotary motor (10) is connected to the polarization adjustment gear. The gear (14) is meshed and connected. A limiter (13) is provided on one side of the polarization adjustment gear (14). The limiter (13) is fixedly installed on the bottom of the mounting plate (11) to limit the rotation range of the polarization adjustment gear (14). The bottom of the mounting plate (11) is provided with a Ku transmitting feed waveguide (5), a Ku receiving feed waveguide (6), a Ka transmitting feed waveguide (7), and a Ka receiving feed waveguide (8). The Ku transmitting feed waveguide (5), Ku receiving feed waveguide (6), Ka transmitting feed waveguide (7), and Ka receiving feed waveguide (8) are all connected to the dual-frequency feed source (4). A Ka polarization switching switch (9) is provided on the top of the Ka transmitting feed waveguide (7).

2. The dual-frequency dual-polarization reflector antenna according to claim 1, characterized in that: The dual-frequency feed (4) includes a ka left-hand channel power divider (30), a ka right-hand channel power divider (28) is fixedly installed on one side of the ka left-hand channel power divider (30), a ka circular polarizer (27) is fixedly installed at the top of the ka left-hand channel power divider (30), a ka transition circular waveguide (26) is fixedly installed at the top of the ka circular polarizer (27), a ka dual-frequency rotary joint (25) is fixedly installed at the top of the ka transition circular waveguide (26), a ka dual-frequency waveguide (24) is fixedly installed at the top of the ka dual-frequency waveguide (24), a ku dual-frequency dual-polarization fed coaxial waveguide (16) is fixedly installed at the top of the ku dual-frequency dual-polarization fed coaxial waveguide (16), a dual-frequency radiating corrugated horn (15) is fixedly installed at the top of the ku dual-frequency dual-polarization fed coaxial waveguide (16), and a ka dielectric radiator (23) is provided on the inner side of the dual-frequency radiating corrugated horn (15).

3. The dual-frequency dual-polarization reflector antenna according to claim 2, characterized in that: The bottom eccentric part of the Ku dual-frequency dual-polarized fed coaxial waveguide (16) is fixedly installed with a Ku transmitting waveguide (17) and a Ku receiving waveguide (18). The bottom end of the Ku transmitting waveguide (17) is fixedly installed with a Ku transmitting waveguide power divider (19). The bottom of the Ku receiving waveguide (18) is fixedly installed with a Ku receiving waveguide power divider (20). The bottom of the Ku receiving waveguide power divider (20) is fixedly installed with a Ku receiving transition waveguide (22). The bottom of the Ku receiving transition waveguide (22) is fixedly installed with a Ka right-hand channel power divider (28). The bottom of the Ku transmitting waveguide power divider (19) is fixedly installed with a Ku transmitting transition waveguide (21).

4. The dual-frequency dual-polarization reflector antenna according to claim 3, characterized in that: The Ku dual-frequency dual-polarization fed coaxial waveguide (16) is provided with feed mounting cylinders (32) on both the left and right sides. The two feed mounting cylinders (32) are located outside the Ku transmitting subwaveguide (17) and the Ku receiving subwaveguide (18), respectively.

5. A dual-frequency dual-polarization reflector antenna according to claim 2, characterized in that: The ka receiving feed waveguide (8) includes a ka blocking filter (38) and two ka receiving connection waveguides (37). The bottom end of the ka left-hand channel power divider (30) is fixedly installed with a left-hand channel connection waveguide (31), and the side of the ka right-hand channel power divider (28) is fixedly installed with a right-hand channel connection waveguide (29). The right-hand channel connection waveguide (29) is located above the left-hand channel connection waveguide (31).

6. A dual-frequency dual-polarization reflector antenna according to claim 5, characterized in that: The bottom end of the left-hand channel connecting waveguide (31) is fixedly installed with a Ku transmitting connecting waveguide (33), and the bottom of the Ku transmitting connecting waveguide (33) is fixedly installed with a Ku rotating joint (34). The Ku receiving feed waveguide (6) includes a Ku receiving connecting waveguide (35) and a Ku blocking and transmitting filter (36).

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