CN110085981B

CN110085981B - Double-frequency satellite antenna variable polarization feed source

Info

Publication number: CN110085981B
Application number: CN201910394265.7A
Authority: CN
Inventors: 沈晓卫; 贾维敏; 伍宗伟; 袁丁; 金伟; 姚敏立
Original assignee: Rocket Force University of Engineering of PLA
Current assignee: Rocket Force University of Engineering of PLA
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2020-05-05
Anticipated expiration: 2039-05-13
Also published as: CN110085981A

Abstract

The invention discloses a four-polarization rapid switching mechanism of a dual-band satellite communication antenna, which comprises a dual-frequency orthogonal network, a Ka polarizer and a Ku polarizer, wherein the Ka polarizer and the Ku polarizer are coaxially arranged; the dual-frequency orthogonal network comprises a one-to-five waveguide power divider, rectangular waveguides and a one-to-four waveguide power divider, wherein the rectangular waveguides are communicated with four rectangular waveguide channel interfaces which are distributed in a cross mode in the circumferential direction of the one-to-five waveguide power divider, and the four-to-four waveguide power divider is communicated with the four rectangular waveguides. The dual-frequency polarization switch device has the advantages of compact structure, reasonable design, reliable use, simultaneous dual-frequency work, realization of linear polarization and circular polarization, convenient polarization switch and strong practicability.

Description

Double-frequency satellite antenna variable polarization feed source

Technical Field

The invention belongs to the technical field of mobile satellite communication, and particularly relates to a variable polarization feed source of a dual-frequency satellite antenna.

Background

At present, satellite communication in China enters a high-flux stage, but the working stability of a high-flux Ka frequency band under an extreme weather environment is not as good as that of Ku, X and C frequency bands, so that a dual-band communication antenna product is produced under the condition, and the current dual-band antenna has some problems:

firstly, the dual-band antenna occupies a large space and has various devices and high production cost;

secondly, the polarization switching structure in the dual-band antenna is complex, and the switching time is long;

thirdly, the polarization mode in the dual-band antenna is single, and only one polarization mode of linear polarization or circular polarization can be realized;

therefore, aiming at the defects existing in the prior art, a dual-frequency satellite antenna variable polarization feed source with compact structure and reasonable design is lacking nowadays, the dual-frequency satellite antenna variable polarization feed source works simultaneously, linear polarization and circular polarization can be realized, the polarization switching is convenient, the structure size is compact, and the use is reliable.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a dual-frequency satellite antenna variable polarization feed source aiming at the defects in the prior art, which has the advantages of compact structure, reasonable design, reliable use, simultaneous dual-frequency operation, realization of linear polarization and circular polarization, convenient polarization switching and strong practicability.

In order to solve the technical problems, the invention adopts the technical scheme that: a dual-frequency satellite antenna variable polarization feed source is characterized in that: the microwave signal transmitting and receiving device comprises a double-frequency orthogonal network for transmitting and receiving microwave signals, a Ka polarizer arranged in the double-frequency orthogonal network and connected with the double-frequency orthogonal network, and a Ku polarizer arranged outside the double-frequency orthogonal network and connected with the double-frequency orthogonal network, wherein the Ka polarizer and the Ku polarizer are coaxially arranged; a first interface of the dual-frequency orthogonal network is connected with a dual-frequency loudspeaker, a second interface of the dual-frequency orthogonal network is connected with a Ka polarizer, and a third interface of the dual-frequency orthogonal network is connected with a Ku polarizer;

the dual-frequency orthogonal network comprises a one-to-five waveguide power divider, rectangular waveguides and a one-to-four waveguide power divider, wherein the rectangular waveguides are communicated with four rectangular waveguide channel interfaces which are distributed in a cross mode in the circumferential direction of the one-to-five waveguide power divider, the one-to-four waveguide power divider is communicated with the four rectangular waveguides, an antenna common port of the one-to-five waveguide power divider is a first interface of the dual-frequency orthogonal network, a circular waveguide channel interface of the one-to-five waveguide power divider is a second interface of the dual-frequency orthogonal network, and an output interface of the one-to-four waveguide power divider is a third interface of the dual-frequency orthogonal network;

the Ka polarizer and the Ku polarizer respectively comprise a 180-degree phase shifter and a 90-degree phase shifter, and the 180-degree phase shifter and the 90-degree phase shifter can rotate along the circumferential direction.

The variable polarization feed source of the dual-frequency satellite antenna is characterized in that: the one-to-five waveguide power divider comprises an integrally formed first waveguide body, wherein a first waveguide cavity is arranged in the first waveguide body, the first waveguide cavity comprises a receiving and transmitting main channel communicated with an antenna common port, four rectangular waveguide channels communicated with the receiving and transmitting main channel and a circular waveguide channel communicated with the receiving and transmitting main channel, the cross section of the receiving and transmitting main channel is gradually reduced from the joint of the four rectangular waveguide channels to the circular waveguide channel, the antenna common port is communicated with the receiving and transmitting main channel, and the circular waveguide channel interface is communicated with the circular waveguide channel;

the four rectangular waveguide channels are respectively a first rectangular waveguide channel, a second rectangular waveguide channel, a third rectangular waveguide channel and a fourth rectangular waveguide channel which are arranged on the four peripheral sides of the first waveguide body, and the four rectangular waveguide channel interfaces are respectively a first rectangular waveguide channel interface communicated with the first rectangular waveguide channel, a second rectangular waveguide channel interface communicated with the second rectangular waveguide channel, a third rectangular waveguide channel interface communicated with the third rectangular waveguide channel and a fourth rectangular waveguide channel interface communicated with the fourth rectangular waveguide channel.

The variable polarization feed source of the dual-frequency satellite antenna is characterized in that: the four rectangular waveguide channel interfaces are all provided with 90-degree rectangular twisted waveguides, the 90-degree rectangular twisted waveguides are fixedly connected with the rectangular waveguides, and the rectangular waveguide channel interfaces, the 90-degree rectangular twisted waveguides and the rectangular waveguides are sequentially communicated.

The variable polarization feed source of the dual-frequency satellite antenna is characterized in that: the one-to-four waveguide power divider comprises an integrally formed second waveguide body, rectangular waveguide channel sub-interfaces which are arranged on the four sides of the second waveguide body and distributed in a cross manner, and a round waveguide common interface which is arranged at the end part, close to the Ku polarizer, of the second waveguide body, wherein a second waveguide cavity is arranged in the second waveguide body, the second waveguide cavity comprises four rectangular waveguide sub-channels which are arranged on the four sides of the second waveguide body, and a round waveguide common channel which is connected with the four rectangular waveguide sub-channels, the round waveguide common interface is communicated with the round waveguide common channel, and the round waveguide common interface is an output interface of the one-to-four waveguide power divider;

the four rectangular waveguide sub-channels are respectively a first sub-rectangular waveguide channel, a second sub-rectangular waveguide channel, a third sub-rectangular waveguide channel and a fourth sub-rectangular waveguide channel which are arranged on the four peripheral sides of the second waveguide body, and the four rectangular waveguide channel sub-interfaces are respectively a first rectangular waveguide channel sub-interface communicated with the first sub-rectangular waveguide channel, a second rectangular waveguide channel sub-interface communicated with the second sub-rectangular waveguide channel, a third rectangular waveguide channel sub-interface communicated with the third sub-rectangular waveguide channel and a fourth rectangular waveguide channel sub-interface communicated with the fourth sub-rectangular waveguide channel.

The variable polarization feed source of the dual-frequency satellite antenna is characterized in that: a plurality of supporting rods uniformly distributed along the circumferential direction are arranged outside the Ku polarizer, the number of the rectangular waveguides is four, the four rectangular waveguides are uniformly distributed along the circumferential direction of the outside of the Ka polarizer, the number of the rectangular waveguides is the same as that of the supporting rods, and the end part, close to the supporting rods, of each rectangular waveguide is fixedly connected with one end of each supporting rod;

the fixing plate is sleeved outside one end, far away from the Ka polarizer, of the Ku polarizer, one end, far away from the rectangular waveguide, of the supporting rod is installed on the fixing plate, and one end of the Ku polarizer penetrates out of the fixing plate.

The variable polarization feed source of the dual-frequency satellite antenna is characterized in that: the Ka polarizer comprises a Ka frequency band orthogonal mode coupler, a Ka frequency band 180-degree phase shifter and a Ka frequency band 90-degree phase shifter, wherein the Ka frequency band orthogonal mode coupler, the Ka frequency band 180-degree phase shifter and the Ka frequency band 90-degree phase shifter are sequentially communicated from a position close to the Ku polarizer to a position far away from the Ku polarizer, a first circular waveguide rotary joint is arranged between the Ka frequency band orthogonal mode coupler and the Ka frequency band 180-degree phase shifter, a second circular waveguide rotary joint is arranged between the Ka frequency band 180-degree phase shifter and the Ka frequency band 90-degree phase shifter, a third circular waveguide rotary joint is arranged at one end, far away from the Ka frequency band 180-degree phase shifter, of the Ka frequency band 90-degree phase shifter, of the Ka frequency band orthogonal mode coupler, the first circular waveguide rotary joint, the Ka frequency band 180-.

The variable polarization feed source of the dual-frequency satellite antenna is characterized in that: one end of the first circular waveguide rotary joint is fixedly connected with the Ka frequency band orthogonal mode coupler, the other end of the first circular waveguide rotary joint is fixedly connected with one end of the Ka frequency band 180-degree phase shifter, one end of the second circular waveguide rotary joint is fixedly connected with the other end of the Ka frequency band 180-degree phase shifter, the other end of the second circular waveguide rotary joint is fixedly connected with one end of the Ka frequency band 90-degree phase shifter, one end of the third circular waveguide rotary joint is fixedly connected with the other end of the Ka frequency band 90-degree phase shifter, and the other end of the third circular waveguide rotary joint is fixedly connected with a circular waveguide channel interface of the one-to-five waveguide power divider.

The variable polarization feed source of the dual-frequency satellite antenna is characterized in that: the Ku polarizer comprises a Ku frequency band orthomode coupler, a Ku frequency band 180-degree phase shifter and a Ku frequency band 90-degree phase shifter which are sequentially communicated from a position far away from the Ka polarizer to a position close to the Ka polarizer, a circular waveguide rotary joint I is arranged between the Ku frequency band orthomode coupler and the Ku frequency band 180-degree phase shifter, a circular waveguide rotary joint II is arranged between the Ku frequency band 180-degree phase shifter and the Ku frequency band 90-degree phase shifter, one end, far away from the Ku frequency band 180-degree phase shifter, of the Ku frequency band 90-degree phase shifter is provided with a circular waveguide rotary joint III, and the Ku frequency band orthomode coupler, the circular waveguide rotary joint I, the Ku frequency band 180-degree phase shifter, the circular waveguide rotary joint II, the Ku frequency band 90-degree phase shifter and the circular waveguide.

The variable polarization feed source of the dual-frequency satellite antenna is characterized in that: one end of the circular waveguide rotary joint I is fixedly connected with the Ku frequency band orthomode coupler, the other end of the circular waveguide rotary joint I is fixedly connected with one end of the Ku frequency band 180-degree phase shifter, one end of the circular waveguide rotary joint II is fixedly connected with the other end of the Ku frequency band 180-degree phase shifter, the other end of the circular waveguide rotary joint II is fixedly connected with one end of the Ku frequency band 90-degree phase shifter, one end of the circular waveguide rotary joint III is fixedly connected with the other end of the Ku frequency band 90-degree phase shifter, and the other end of the circular waveguide rotary joint III is connected with an output interface of the one-to-four waveguide power divider.

The variable polarization feed source of the dual-frequency satellite antenna is characterized in that: a B output port of the Ka polarizer is provided with a first BJ320 waveguide, a C output port of the Ka polarizer is provided with a first BJ220 waveguide, the B output port of the Ka polarizer is connected with a Ka frequency band transmitter through the first BJ320 waveguide, and the C output port of the Ka polarizer is connected with a Ka frequency band receiver through the first BJ220 waveguide;

the D output port of the Ku polarizer is provided with a first BJ120 waveguide, the E output port of the Ku polarizer is provided with a second BJ120 waveguide, the D output port of the Ku polarizer is connected with a Ku frequency band transmitter through the first BJ120 waveguide, and the E output port of the Ku polarizer is connected with a Ku frequency band receiver through the second BJ120 waveguide.

Compared with the prior art, the invention has the following advantages:

1. the dual-frequency satellite antenna variable polarization feed source is compact in structure, the Ka polarizer and the Ku polarizer are coaxially arranged in and out of the dual-frequency orthogonal network through the arrangement of the Ka polarizer and the Ku polarizer, the space utilization rate of a device is effectively improved through the realization of the internal and external arrangement of the dual-frequency polarizer, and the space occupied space is reduced.

2. The adopted dual-frequency satellite antenna variable polarization feed source is provided with the Ka polarizer and the Ku polarizer, so that dual-frequency simultaneous working of a Ka frequency band and a Ku frequency band is realized, and the satellite communication requirement is met.

3. The one-to-five waveguide power divider is used for dividing a received microwave signal into one path of Ka frequency band and four paths of Ku frequency band components so that a Ka polarizer can receive the signal of the Ka frequency band, the four paths of Ku frequency band components are combined into one path of Ku frequency band through the one-to-four waveguide power divider so that the Ku polarizer can receive the Ku frequency band signal, or the transmitted Ku frequency band is divided into four paths of Ku frequency band components through the one-to-four waveguide power divider and sent to the one-to-five waveguide power divider, the transmitted Ka frequency band is sent to the one-to-five waveguide power divider through the Ka polarizer, the four paths of Ku frequency band components and the Ka frequency band are combined into Ku and Ka double frequency bands in the one-to-five waveguide power divider for transmission, and the double-band transmitting and receiving functions of the microwave signal are achieved.

4. The adopted Ka polarizer and Ku polarizer both comprise a 180-degree phase shifter and a 90-degree phase shifter, and the switching between linear polarization and circular polarization is realized by adjusting the positions of the 180-degree phase shifter and the 90-degree phase shifter which rotate along the circumferential direction, so that the polarization switching is convenient.

In conclusion, the dual-band polarization switch has the advantages of compact structure, reasonable design, reliable use, simultaneous dual-frequency work, realization of linear polarization and circular polarization, convenience in polarization switching and strong practicability.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a sectional view B-B of fig. 1.

Fig. 4 is a schematic structural diagram of a dual-frequency orthogonal network according to the present invention.

FIG. 5 is a schematic diagram of the structure of the Ka polarizer of the present invention.

Fig. 6 is a cross-sectional view C-C of fig. 5.

Fig. 7 is a schematic structural diagram of the Ku polarizer of the present invention.

Fig. 8 is a cross-sectional view taken along line D-D of fig. 7.

Fig. 9 is a schematic structural diagram of a one-to-five waveguide power divider according to the present invention.

Fig. 10 is a front view of fig. 9.

Fig. 11 is a cross-sectional view E-E of fig. 10.

Fig. 12 is a sectional view F-F of fig. 10.

Fig. 13 is a schematic structural diagram of a one-to-four waveguide power divider according to the present invention.

Fig. 14 is a left side view of fig. 13.

Fig. 15 is a sectional view taken along line G-G of fig. 14.

FIG. 16 is a schematic diagram of the position of the adjustment of the circular polarization of the Ku polarizer of the present invention.

FIG. 17 is a schematic diagram of the adjustment position of the circular polarization of the Ka polarizer of the present invention.

FIG. 18 is a schematic diagram of the adjustment position of linear polarization of the Ku polarizer of the present invention.

FIG. 19 is a schematic diagram showing the adjustment positions of linear polarization of the Ka polarizer of the present invention.

Description of reference numerals:

1-dual frequency orthogonal network; 1-one-to-five waveguide power divider;

1-2-90 degree rectangular twisted waveguide; 1-3-rectangular waveguide;

1-4-one-to-four waveguide power divider; 2-a Ka polarizer;

2-1-Ka frequency band orthogonal mode coupler; 2-Ka frequency band 90 degree phase shifter;

2-3-1-a first circular waveguide rotary joint; 2-3-2-second circular waveguide rotary joint;

2-3-third circular waveguide rotary joint; 2-4-Ka frequency band 180 degree phase shifter;

2-5-1-a first gear; 2-5-2-second gear;

2-6-Ka polarizer common port; 2-7-B output port;

2-8-C output port; 3-Ku polarizer;

3-1-Ku frequency band orthogonal mode coupler; 3-2-1-circular waveguide rotary joint I;

3-2-circular waveguide rotary joint II; 3-2-3-circular waveguide rotary joint III;

3-Ku frequency range 180 degree phase shifter; 3-4-Ku frequency band 90 degree phase shifter;

3-5-1-third gear; 3-5-2-fourth gear;

3-6-Ku polarizer common port; 3-7-D output port;

3-8-E output port; 4-a first BJ220 waveguide;

5 — first BJ320 waveguide; 6, fixing a plate; 7, supporting rods;

8-antenna common port; 8-1-a transmit-receive overall channel;

9-circular waveguide channel interface; 9-1-circular waveguide channel;

11-a first rectangular waveguide channel interface; 11-1 — a first rectangular waveguide channel;

12-a second rectangular waveguide channel interface; 12-1 — a second rectangular waveguide channel;

13-third rectangular waveguide channel interface; 13-1 — a third rectangular waveguide channel;

14-a fourth rectangular waveguide channel interface; 14-1 — a fourth rectangular waveguide channel;

15-a first rectangular waveguide channel tap; 15-1 — a first sub-rectangular waveguide channel;

16-a second rectangular waveguide channel interface; 16-1 — a second sub-rectangular waveguide channel;

17-a third rectangular waveguide channel tap; 17-1-a third sub-rectangular waveguide channel;

18-a fourth rectangular waveguide channel tap; 18-1-a fourth rectangular waveguide channel;

19-circular waveguide common interface; 19-1-circular waveguide common channel.

Detailed Description

As shown in fig. 1, fig. 2 and fig. 4, the dual-frequency satellite antenna variable polarization feed source includes a dual-frequency orthogonal network 1 for receiving and transmitting microwave signals, a Ka polarizer 2 disposed in the dual-frequency orthogonal network 1 and connected to the dual-frequency orthogonal network 1, and a Ku polarizer 3 disposed outside the dual-frequency orthogonal network 1 and connected to the dual-frequency orthogonal network 1, where the Ka polarizer 2 and the Ku polarizer 3 are coaxially disposed; a first interface of the dual-frequency orthogonal network 1 is connected with a dual-frequency loudspeaker, a second interface of the dual-frequency orthogonal network 1 is connected with a Ka polarizer 2, and a third interface of the dual-frequency orthogonal network 1 is connected with a Ku polarizer;

the dual-frequency orthogonal network 1 comprises a one-to-five waveguide power divider 1-1, rectangular waveguides 1-3 communicated with four rectangular waveguide channel interfaces which are distributed in a crossed manner in the circumferential direction of the one-to-five waveguide power divider 1-1, and a one-to-four waveguide power divider 1-4 communicated with the four rectangular waveguides 1-3, wherein an antenna common port 8 of the one-to-five waveguide power divider 1-1 is a first interface of the dual-frequency orthogonal network 1, a circular waveguide channel interface 9 of the one-to-five waveguide power divider 1-1 is a second interface of the dual-frequency orthogonal network 1, and output interfaces of the one-to-four waveguide power divider 1-4 are third interfaces of the dual-frequency orthogonal network 1;

the Ka polarizer 2 and the Ku polarizer 3 each include a 180-degree phase shifter and a 90-degree phase shifter, and both the 180-degree phase shifter and the 90-degree phase shifter can rotate in the circumferential direction.

As shown in fig. 9, 10, 11, and 12, in this embodiment, the one-to-five waveguide power divider 1-1 includes an integrally formed first waveguide body, a first waveguide cavity is disposed in the first waveguide body, the first waveguide cavity includes a total transceiving channel 8-1 communicated with an antenna common port 8, four rectangular waveguide channels communicated with the total transceiving channel 8-1, and a circular waveguide channel 9-1 communicated with the total transceiving channel 8-1, a cross section of the total transceiving channel 8-1 gradually decreases from a connection point with the four rectangular waveguide channels to the circular waveguide channel 9-1, the antenna common port 8 is communicated with the total transceiving channel 8-1, and the circular waveguide channel interface 9 is communicated with the circular waveguide channel 9-1;

the four rectangular waveguide channels are respectively a first rectangular waveguide channel 11-1, a second rectangular waveguide channel 12-1, a third rectangular waveguide channel 13-1 and a fourth rectangular waveguide channel 14-1 which are arranged on the four sides of the first waveguide body, and the four rectangular waveguide channel interfaces are respectively a first rectangular waveguide channel interface 11 communicated with the first rectangular waveguide channel 11-1, a second rectangular waveguide channel interface 12 communicated with the second rectangular waveguide channel 12-1, a third rectangular waveguide channel interface 13 communicated with the third rectangular waveguide channel 13-1 and a fourth rectangular waveguide channel interface 14 communicated with the fourth rectangular waveguide channel 14-1.

As shown in fig. 4, in this embodiment, 90-degree rectangular twisted waveguides 1-2 are respectively disposed at four rectangular waveguide channel interfaces, the 90-degree rectangular twisted waveguides 1-2 are fixedly connected to rectangular waveguides 1-3, and the rectangular waveguide channel interfaces, the 90-degree rectangular twisted waveguides 1-2 and the rectangular waveguides 1-3 are sequentially communicated.

As shown in fig. 13, 14 and 15, in this embodiment, the one-to-four waveguide power divider 1-4 includes an integrally formed second waveguide body, rectangular waveguide channel sub-interfaces disposed on the four sides of the second waveguide body and arranged in a cross manner, and a circular waveguide common interface 19 disposed at an end of the second waveguide body close to the Ku polarizer, a second waveguide cavity is disposed in the second waveguide body, the second waveguide cavity includes four rectangular waveguide sub-channels disposed on the four sides of the second waveguide body and a circular waveguide common channel 19-1 connected to the four rectangular waveguide sub-channels, the circular waveguide common interface 19 is communicated with the circular waveguide common channel 19-1, and the circular waveguide common interface 19 is an output interface of the one-to-four waveguide power divider 1-4;

the four rectangular waveguide sub-channels are respectively a first sub-rectangular waveguide channel 15-1, a second sub-rectangular waveguide channel 16-1, a third sub-rectangular waveguide channel 17-1 and a fourth sub-rectangular waveguide channel 18-1 which are arranged on the four sides of the second waveguide body, and the four rectangular waveguide channel sub-interfaces are respectively a first rectangular waveguide channel sub-interface 15 communicated with the first sub-rectangular waveguide channel 15-1, a second rectangular waveguide channel sub-interface 16 communicated with the second sub-rectangular waveguide channel 16-1, a third rectangular waveguide channel sub-interface 17 communicated with the third sub-rectangular waveguide channel 17-1 and a fourth rectangular waveguide channel sub-interface 18 communicated with the fourth sub-rectangular waveguide channel 18-1.

As shown in fig. 1, in this embodiment, a plurality of support rods 7 are uniformly distributed along the circumferential direction outside the Ku polarizer 3, the number of the rectangular waveguides 1 to 3 is four, four rectangular waveguides 1 to 3 are uniformly distributed along the circumferential direction outside the Ka polarizer 2, the number of the rectangular waveguides 1 to 3 is the same as that of the support rods 7, and the end portions, close to the support rods 7, of the rectangular waveguides 1 to 3 are fixedly connected to one end of the support rods 7;

and a fixing plate 6 is sleeved outside one end of the Ku polarizer 3, which is far away from the Ka polarizer 2, one end of the support rod 7, which is far away from the rectangular waveguide 1-3, is installed on the fixing plate 6, and one end of the Ku polarizer 3 penetrates out of the fixing plate 6.

As shown in fig. 5 and 6, in this embodiment, the Ka polarizer 2 includes a Ka-band orthogonal mode coupler 2-1, a Ka-band 180 degree phase shifter 2-4, and a Ka-band 90 degree phase shifter 2-2 sequentially connected from a position close to the Ku polarizer 3 to a position away from the Ku polarizer 3, a first circular waveguide rotary joint 2-3-1 is disposed between the Ka-band orthogonal mode coupler 2-1 and the Ka-band 180 degree phase shifter 2-4, a second circular waveguide rotary joint 2-3-2 is disposed between the Ka-band 180 degree phase shifter 2-4 and the Ka-band 90 degree phase shifter 2-2, a third circular waveguide rotary joint 2-3-3 is disposed at one end of the Ka-band 90 degree phase shifter 2-2 away from the Ka-band 180 degree phase shifter 2-4, and the Ka-band orthogonal mode coupler 2-1, The first circular waveguide rotary joint 2-3-1, the Ka frequency range 180-degree phase shifter 2-4, the second circular waveguide rotary joint 2-3-2, the Ka frequency range 90-degree phase shifter 2-2 and the third circular waveguide rotary joint 2-3-3 are communicated.

In the embodiment, one end of the first circular waveguide rotary joint 2-3-1 is fixedly connected with the Ka frequency band orthogonal mode coupler 2-1, the other end of the first circular waveguide rotary joint 2-3-1 is fixedly connected with one end of a Ka frequency range 180-degree phase shifter 2-4, one end of the second circular waveguide rotary joint 2-3-2 is fixedly connected with the other end of the Ka frequency range 180-degree phase shifter 2-4, the other end of the second circular waveguide rotary joint 2-3-2 is fixedly connected with one end of a Ka frequency range 90-degree phase shifter 2-2, one end of the third circular waveguide rotary joint 2-3-3 is fixedly connected with the other end of the Ka frequency range 90-degree phase shifter 2-2, the other end of the third circular waveguide rotary joint 2-3-3 is fixedly connected with a circular waveguide channel interface 9 of the one-to-five waveguide power divider 1-1.

As shown in fig. 7 and 8, in this embodiment, the Ku polarizer 3 includes a Ku frequency band orthogonal mode coupler 3-1, a Ku frequency band 180 ° phase shifter 3-3, and a Ku frequency band 90 ° phase shifter 3-4 sequentially connected from a position far from the Ka polarizer 2 to a position near the Ka polarizer 2, a circular waveguide rotary joint i 3-2-1 is disposed between the Ku frequency band orthogonal mode coupler 3-1 and the Ku frequency band 180 ° phase shifter 3-3, a circular waveguide rotary joint ii 3-2-2 is disposed between the Ku frequency band 180 ° phase shifter 3-3 and the Ku frequency band 90 ° phase shifter 3-4, a circular waveguide rotary joint iii 3-2-3 is disposed at one end of the Ku frequency band 90 ° phase shifter 3-4 far from the Ku frequency band 180 ° phase shifter 3-3, and a circular waveguide rotary joint iii 3-1 is disposed at one end of the Ku frequency band 90 ° phase shifter 3-4 far from the Ku frequency band 180 ° phase shifter 3-, The round waveguide rotary joint I3-2-1, the Ku frequency range 180-degree phase shifter 3-3, the round waveguide rotary joint II 3-2-2, the Ku frequency range 90-degree phase shifter 3-4 and the round waveguide rotary joint III 3-2-3 are communicated.

In the embodiment, one end of the circular waveguide rotary joint I3-2-1 is fixedly connected with a Ku frequency band orthogonal mode coupler 3-1, the other end of the circular waveguide rotary joint I3-2-1 is fixedly connected with one end of a Ku frequency range 180-degree phase shifter 3-3, one end of the circular waveguide rotary joint II 3-2-2 is fixedly connected with the other end of the Ku frequency range 180-degree phase shifter 3-3, the other end of the circular waveguide rotary joint II 3-2-2 is fixedly connected with one end of a Ku frequency range 90-degree phase shifter 3-4, one end of the circular waveguide rotary joint III 3-2-3 is fixedly connected with the other end of the Ku frequency range 90-degree phase shifter 3-4, the other end of the circular waveguide rotary joint III 3-2-3 is connected with an output interface of a one-to-four waveguide power divider 1-4.

As shown in fig. 3, in this embodiment, a first BJ320 waveguide 5 is disposed at a B output port 2-7 of the Ka polarizer 2, a first BJ220 waveguide 4 is disposed at a C output port 2-8 of the Ka polarizer 2, the B output port 2-7 of the Ka polarizer 2 is connected to a Ka-band transmitter through the first BJ320 waveguide 5, and the C output port 2-8 of the Ka polarizer 2 is connected to a Ka-band receiver through the first BJ220 waveguide 4;

a first BJ120 waveguide is arranged at a D output port 3-7 of the Ku polarizer, a second BJ120 waveguide is arranged at an E output port 3-8 of the Ku polarizer, the D output port 3-7 of the Ku polarizer is connected with a Ku frequency band transmitter through the first BJ120 waveguide, and the E output port 3-8 of the Ku polarizer is connected with a Ku frequency band receiver through the second BJ 120.

In this embodiment, the one-to-five waveguide power divider 1-1 is arranged to divide the received microwave signal into one Ka band component and four Ku band components, so that the Ka polarizer can receive the signal of the Ka frequency band, four paths of Ku frequency band components are combined into one path of Ku frequency band by a one-to-four waveguide power divider 1-4, so that the Ku polarizer 3 can receive the signal of the Ku frequency band, or the transmitted Ku frequency band is divided into four paths of Ku frequency band components by a one-to-four waveguide power divider 1-4 and sent to a one-to-five waveguide power divider 1-1, and the one-to-five waveguide power divider 1-1 is combined into one path of Ku frequency band signal, the transmitted Ka frequency band is transmitted to the one-to-five waveguide power divider 1-1 through a Ka polarizer, and the Ku frequency band signal and the Ka frequency band signal are transmitted through an antenna common port 8 of the one-to-five waveguide power divider 1-1, so that the dual-frequency band receiving and transmitting function of the microwave signal is realized.

In this embodiment, the first rectangular waveguide channel 11-1, the third rectangular waveguide channel 13-1, the second rectangular waveguide channel 12-1, and the fourth rectangular waveguide channel 14-1 are provided to decompose a received Ku frequency band signal into a horizontal component of 2 Ku frequency band signals with a phase difference of 180 degrees and a vertical component of 2 Ku frequency band signals with a phase difference of 180 degrees; or the horizontal direction component of the transmitted 2 Ku frequency band signals with 180-degree phase difference and the vertical direction component of the 2 Ku frequency band signals with 180-degree phase difference are combined into the Ku frequency band signal.

In this embodiment, the 90 ° rectangular twisted waveguide 1-2 is arranged to respectively turn 90 ° directions of rectangular waveguide ports of a first rectangular waveguide channel interface 11 communicated with the first rectangular waveguide channel 11-1, a second rectangular waveguide channel interface 12 communicated with the second rectangular waveguide channel 12-1, a third rectangular waveguide channel interface 13 communicated with the third rectangular waveguide channel 13-1, and a fourth rectangular waveguide channel interface 14 communicated with the fourth rectangular waveguide channel 14-1, so as to implement a rectangular twisted waveguide function to compress a space.

In this embodiment, the support rod 7 is provided to facilitate fixing of the ends of the rectangular waveguides 1 to 3, and to form a cavity for accommodating the Ku polarizer 3, thereby facilitating fixing and mounting of the Ku polarizer 3.

In this embodiment, the Ka-band 180-degree phase shifter 2-4 and the Ka-band 90-degree phase shifter 2-2 in the Ka polarizer 2 are arranged to change the phase difference of the Ka-band microwave signals, so as to implement horizontal linear polarization, vertical linear polarization, left-hand circular polarization and right-hand circular polarization of the Ka-band microwave signals, so that the antenna has four different polarization characteristics, i.e., horizontal linear polarization, vertical linear polarization, left-hand circular polarization, right-hand circular polarization, and the like, and has the advantages of good polarization characteristics, good standing wave characteristics, small occupied volume and simple implementation.

In this embodiment, the first circular waveguide rotary joint 2-3-1, the second circular waveguide rotary joint 2-3-2, and the third circular waveguide rotary joint 2-3-3 are arranged to realize continuous 360-degree rotation adjustment of the Ka-band 180-degree phase shifter 2-4 and the Ka-band 90-degree phase shifter 2-2 when the Ka-band orthomode coupler 2-1 is not in a fixed position, so that linear polarization and circular polarization of the Ka-band microwave signal are switched, and the polarization switching is convenient.

In the embodiment, a first gear 2-5-1 is sleeved on the outer side surface of the first circular waveguide rotary joint 2-3-1 close to the Ka frequency band 180-degree phase shifter 2-4, and a second gear 2-5-2 is sleeved on the outer side surface of the third circular waveguide rotary joint 2-3-3 close to the Ka frequency band 90-degree phase shifter 2-2.

In this embodiment, the first gear 2-5-1 and the second gear 2-5-2 are provided for an operator to manually rotate or to drive an external motor module to rotate during adjustment, so that the Ka band 180 degree phase shifter 2-4 is driven to rotate by rotation of the first gear 2-5-1, and the Ka band 90 degree phase shifter 2-2 is driven to rotate by rotation of the second gear 2-5-2, thereby achieving angle adjustment of the Ka band 180 degree phase shifter 2-4 and the Ka band 90 degree phase shifter 2-2 inside shift photos, but electrically maintaining a conduction state.

In this embodiment, the Ku-band 180 ° phase shifter 3-3 and the Ku-band 90 ° phase shifter 3-4 in the Ku polarizer 3 are provided to change a phase difference of a Ku-band microwave signal, thereby implementing horizontal linear polarization, vertical linear polarization, left-hand circular polarization, and right-hand circular polarization of the Ku-band microwave signal, so that the antenna has four different polarization characteristics, i.e., horizontal linear polarization, vertical linear polarization, left-hand circular polarization, and right-hand circular polarization, and has the advantages of good polarization characteristics, good standing wave characteristics, small occupied volume, and simple implementation.

In this embodiment, the Ka band orthomode coupler 2-1 is arranged such that when the B output port 2-7 of the Ka band orthomode coupler 2-1 is connected to the Ka band transmitter and the C output port 2-8 of the Ka band orthomode coupler 2-1 is connected to the Ka band receiver, the Ka band orthomode coupler 2-1 realizes isolation of transmission and reception signals according to the orthogonal characteristics of 2 different polarized waves. In addition, when the B output port 2-7 and the C output port 2-8 of the Ka-band orthogonal mode coupler 2-1 are both connected with the Ka-band receiver, the Ka-band orthogonal mode coupler 2-1 can separate vertical and horizontal signals in the same frequency band, so that the simultaneous receiving of vertical polarization and horizontal polarization in the Ka-band or the simultaneous receiving function of left-hand circular polarization and right-hand circular polarization is realized, and the communication capacity of the antenna is increased.

In this embodiment, the circular waveguide rotary joint i 3-2-1, the circular waveguide rotary joint ii 3-2-2, and the circular waveguide rotary joint iii 3-2-3 are arranged to realize continuous 360 ° rotation adjustment of the Ku frequency band 180 ° phase shifter 3-3 and the Ku frequency band 90 ° phase shifter 3-4 when the Ku frequency band orthomode coupler 3-1 is stationary, thereby realizing switching between linear polarization and circular polarization of Ku frequency band microwave signals, the polarization switching is convenient, but the conduction state is electrically maintained.

In the embodiment, a third gear 3-5-1 is sleeved on the outer side surface, close to the Ku frequency band 180-degree phase shifter 3-3, of the circular waveguide rotary joint I3-2-1, and a fourth gear 3-5-2 is sleeved on the outer side surface, close to the Ku frequency band 90-degree phase shifter 3-4, of the circular waveguide rotary joint III 3-2-3.

In this embodiment, the third gear 3-5-1 and the fourth gear 3-5-2 are provided for an operator to manually rotate or to drive an external motor module to rotate during adjustment, so that the Ku frequency band 180 ° phase shifter 3-3 is driven to rotate by rotation of the third gear 3-5-1, and the Ku frequency band 90 ° phase shifter 3-4 is driven to rotate by rotation of the fourth gear 3-5-2, thereby achieving angle adjustment of the internally-shifted photos of the Ku frequency band 180 ° phase shifter 3-3 and the Ku frequency band 90 ° phase shifter 3-4.

In this embodiment, the Ku-band orthomode coupler 3-1 is arranged so that when the D output port 3-7 of the Ku-band orthomode coupler 3-1 is connected to a Ku-band transmitter and the E output port 3-8 of the Ku-band orthomode coupler 3-1 is connected to a Ku-band receiver, the Ku-band orthomode coupler 3-1 realizes isolation of transmission and reception signals according to the orthogonal characteristics of 2 different polarized waves. In addition, when the D output port 3-7 and the E output port 3-8 of the Ku frequency band orthogonal mode coupler 3-1 are both connected with the Ku frequency band receiver, the Ku frequency band orthogonal mode coupler 3-1 can separate vertical and horizontal signals in the same frequency band, so that the simultaneous receiving of vertical polarization and horizontal polarization in the Ku frequency band is realized, or the simultaneous receiving function of left-hand circular polarization and right-hand circular polarization is realized, and the communication capacity of the antenna is increased.

In this embodiment, in the in-service use through set up with the polarizer in the gear drive structure can realize two kinds of operating modes of quick manual switch and electric control of the polarization mode of two frequency channels, simultaneously because the polarizer rotating device is small in quantity, light in weight, can realize 360 rotations in succession, can realize quick, real-time, accurate, reliable automatic operation.

In this embodiment, the circular waveguide channel interface 9 is connected to the Ka polarizer common port 2-6, and the circular waveguide common interface 19 is connected to the Ku polarizer common port 3-6.

It should be noted that, in the actual use process, the Ka polarizer 2 may be replaced by a Ku polarizer, and the Ku polarizer 3 may be replaced by an X-band polarizer;

the Ka polarizer 2 can be replaced by a Ku polarizer, and the Ku polarizer 3 can be replaced by a C-band polarizer;

it should be noted that, in the actual use process, when Ka polarizer 2 is not changed, Ku polarizer 3 may be replaced by an X-band polarizer or a C-band polarizer.

It should be noted that, in actual use, the Ku-band 180 ° phase shifter 3-3 and the Ku-band 90 ° phase shifter 3-4 may have the same or different cross sections, and the Ka-band 180 ° phase shifter 2-4 and the Ka-band 90 ° phase shifter 2-2 may have the same or different cross sections, and for convenience of explaining the positions of phase-shifted pictures in the respective phase shifters, the cross section of the Ku-band 180 ° phase shifter 3-3 is shown to be larger than the cross section of the Ku-band 90 ° phase shifter 3-4 in fig. 16 and 18, and the cross section of the Ka-band 180 ° phase shifter 2-4 is shown to be larger than the cross section of the Ka-band 90 ° phase shifter 2-2 in fig. 17 and 19.

In this embodiment, it should be noted that the phase shift film of the Ku frequency band 180 ° phase shifter 3-3 and the phase shift film of the Ku frequency band 90 ° phase shifter 3-4 are respectively a protrusion of the Ku frequency band 180 ° phase shifter 3-3 and a protrusion of the Ku frequency band 90 ° phase shifter 3-4, and the phase shift film of the Ka frequency band 180 ° phase shifter 2-4 and the phase shift film of the Ka frequency band 90 ° phase shifter 2-2 are respectively a protrusion of the Ka frequency band 180 ° phase shifter 2-4 and a protrusion of the Ka frequency band 90 ° phase shifter 2-2.

In this embodiment, it should be noted that the phase shift pictures in the Ku frequency band 180 ° phase shifter 3-3 and the Ku frequency band 90 ° phase shifter 3-4, the Ka frequency band 180 ° phase shifter 2-4 and the Ka frequency band 90 ° phase shifter 2-2 may be phase shifted in the form of metal ridges, screws, dielectric sheets, and the like.

When the Ku frequency band orthogonal mode coupler is used, a third gear 3-5-1 and a fourth gear 3-5-2 are driven to rotate manually or electrically, the Ku frequency band 180-degree phase shifter 3-3 is driven to rotate by the rotation of the third gear 3-5-1, the Ku frequency band 90-degree phase shifter 3-4 is driven to rotate by the rotation of the fourth gear 3-5-2, as shown in the figure 17, a coordinate system is established, wherein the origin of the coordinate system is a point on the central axis of the Ku frequency band 180-degree phase shifter 3-3 and the Ku frequency band 90-degree phase shifter 3-4, and a straight line passing through the origin of the coordinate system and vertically projecting downwards to be superposed with the central line of a D output port 3-7 of the Ku frequency band orthogonal mode coupler 3-1 is the; passing through the origin of the coordinate system and being perpendicular to the positive direction of the X axis to form the positive direction of the Y axis, and according with the coordinate system of the right hand, the included angle between the phase shift picture in the Ku frequency band 90-degree phase shifter 3-4 and the X axis of the coordinate system is the position of the phase shift picture in the Ku frequency band 90-degree phase shifter 3-4, and the included angle between the phase shift picture in the Ku frequency band 180-degree phase shifter 3-3 and the X axis of the coordinate system is the position of the phase shift picture in the Ku frequency band 180-degree phase shifter 3-3.

The Ku polarizer 3 circular polarization is implemented as follows:

when the position of the phase shift picture in the Ku frequency band 180 ° phase shifter 3-3 is adjusted to be 0 °, 90 °, 180 ° or 270 °, and the position of the phase shift picture in the Ku frequency band 90 ° phase shifter 3-4 is adjusted to be 45 ° or 225 °, namely, fig. a, B, C, D, I, J, K and L in fig. 16, when the Ku polarizer 3 is used for transceiving, the D output port 3-7 of the Ku polarizer 3 is used for transmitting left-hand circular polarization, and the E output port 3-8 of the Ku polarizer 3 is used for receiving right-hand circular polarization; when the Ku polarizer 3 is only used for receiving, the D output port 3-7 of the Ku polarizer 3 is in a state of receiving left-hand circular polarization, and the E output port 3-8 of the Ku polarizer 3 is in a state of receiving right-hand circular polarization;

when the position of the phase shift picture in the Ku frequency band 180 ° phase shifter 3-3 is adjusted to be 0 °, 90 °, 180 ° or 270 °, and the position of the phase shift picture in the Ku frequency band 90 ° phase shifter 3-4 is adjusted to be 135 ° or 315 °, namely, fig. E, F, G, H, M, N, O and P in fig. 16, when the Ku polarizer 3 is used for transceiving, the D output port 3-7 of the Ku polarizer 3 is in a state of transmitting right-hand circular polarization, and the E output port 3-8 of the Ku polarizer 3 is in a state of receiving left-hand circular polarization; when the Ku polarizer 3 is only used for receiving, a D output port 3-7 of the Ku polarizer 3 is in a state of receiving right-hand circular polarization, and an E output port 3-8 of the Ku polarizer 3 is in a state of receiving left-hand circular polarization;

the Ka-polarizer 2 circular polarization is implemented as follows:

when the position of the phase shift film in the Ka-band 180 ° phase shifter 2-4 is adjusted to be 0 °, 90 °, 180 ° or 270 °, and when the position of the phase shift film in the Ka-band 90 ° phase shifter 2-2 is adjusted to be 45 ° or 225 °, i.e., fig. a ', fig. B', fig. C ', fig. D', fig. I ', fig. J', fig. K 'and fig. L' in fig. 17, when the Ka polarizer 2 is used for transceiving, the B output port 2-7 of the Ka polarizer 2 is in a state of transmitting left-hand circular polarization, and the C output port 2-8 of the Ka polarizer 2 is in a state of receiving right-hand circular polarization; when the Ka polarizer 2 is only used for receiving, the B output port 2-7 of the Ka polarizer 2 is used for receiving left-hand circular polarization, and the C output port 2-8 of the Ka polarizer 2 is used for receiving right-hand circular polarization;

when the position of the phase shift film in the Ka-band 180 ° phase shifter 2-4 is adjusted to be 0 °, 90 °, 180 ° or 270 °, and when the position of the phase shift film in the Ka-band 90 ° phase shifter 2-2 is adjusted to be 135 ° or 315 °, i.e., fig. E ', fig. F', fig. G ', fig. H', fig. M ', fig. N', fig. O 'and fig. P' in fig. 17, when the Ka polarizer 2 is used for transceiving, the B output port 2-7 of the Ka polarizer 2 is in a state of transmitting right-hand circular polarization, and the C output port 2-8 of the Ka polarizer 2 is in a state of receiving left-hand circular polarization; when the Ka polarizer 2 is only used for receiving, the B output port 2-7 of the Ka polarizer 2 is in a state of receiving right-hand circular polarization, and the C output port 2-8 of the Ka polarizer 2 is in a state of receiving left-hand circular polarization;

the Ku polarizer 3 linear polarization is implemented as follows:

when the position of the phase shift picture in the Ku frequency band 90 ° phase shifter 3-4 is adjusted to be 0 °, 90 °, 180 ° or 270 °, and the position of the phase shift picture in the Ku frequency band 180 ° phase shifter 3-3 is adjusted to be 45 ° or 225 °, that is, fig. a, c, E, g, i, k, m and o in fig. 18, when the Ku polarizer 3 is used for transceiving, the D output port 3-7 of the Ku polarizer 3 is in a transmission horizontal line polarization state, and the E output port 3-8 of the Ku polarizer 3 is in a reception vertical line polarization state; when the Ku polarizer 3 is used only for receiving, a D output port 3-7 of the Ku polarizer 3 is in a receiving horizontal linear polarization state, and an E output port 3-8 of the Ku polarizer 3 is in a receiving vertical linear polarization state;

when the position of the phase shift picture in the Ku frequency band 90 ° phase shifter 3-4 is adjusted to be 0 °, 90 °, 180 ° or 270 °, and the position of the phase shift picture in the Ku frequency band 180 ° phase shifter 3-3 is adjusted to be 135 ° or 315 °, that is, fig. b, D, f, h, j, l, n and p in fig. 18, when the Ku polarizer 3 is used for transceiving, the D output port 3-7 of the Ku polarizer 3 is in a vertical transmission line polarization state, and the E output port 3-8 of the Ku polarizer 3 is in a horizontal reception line polarization state; when the Ku polarizer 3 is used only for receiving, a D output port 3-7 of the Ku polarizer 3 is in a receiving vertical linear polarization state, and an E output port 3-8 of the Ku polarizer 3 is in a receiving horizontal linear polarization state;

the linear polarization of the Ka polarizer 2 is achieved as follows:

when the position of the phase shift film in the Ka-band 90 ° phase shifter 2-2 is adjusted to be 0 °, 90 °, 180 ° or 270 °, and the position of the phase shift film in the Ka-band 180 ° phase shifter 2-4 is adjusted to be 45 ° or 225 °, i.e. fig. a ', fig. C', fig. e ', fig. g', fig. i ', fig. k', fig. m 'and fig. o' in fig. 19, when the Ka polarizer 2 is used for transceiving, the B output port 2-7 of the Ka polarizer 2 is in a transmitting horizontal line polarization state, and the C output port 2-8 of the Ka polarizer 2 is in a receiving vertical line polarization state; when the Ka polarizer 2 is only used for receiving, the B output port 2-7 of the Ka polarizer 2 is in a receiving horizontal linear polarization state, and the C output port 2-8 of the Ka polarizer 2 is in a receiving vertical linear polarization state;

when the position of the phase shift film in the Ka-band 90 ° phase shifter 2-2 is adjusted to be 0 °, 90 °, 180 ° or 270 °, and the position of the phase shift film in the Ka-band 180 ° phase shifter 2-4 is adjusted to be 135 ° or 315 °, i.e., fig. B ', fig. d', fig. f ', fig. h', fig. j ', fig. l', fig. n 'and fig. p' in fig. 19, when the Ka polarizer 2 is used for transceiving, the B output port 2-7 of the Ka polarizer 2 is in a vertical transmission line polarization state, and the C output port 2-8 of the Ka polarizer 2 is in a horizontal reception line polarization state; when Ka polarizer 2 is used for reception only, B output ports 2 to 7 of Ka polarizer 2 are in a reception vertical linear polarization state, and C output ports 2 to 8 of Ka polarizer 2 are in a reception horizontal linear polarization state. Therefore, horizontal linear polarization, vertical linear polarization, left-hand circular polarization and right-hand circular polarization of Ka-band and Ku-band microwave signals are achieved, and the antenna has four different polarization characteristics such as horizontal linear polarization, vertical linear polarization, left-hand circular polarization and right-hand circular polarization, is good in polarization characteristic, good in standing wave characteristic, small in occupied size and simple to achieve.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A dual-frequency satellite antenna variable polarization feed source is characterized in that: the microwave signal transmitting and receiving device comprises a double-frequency orthogonal network (1) for transmitting and receiving microwave signals, a Ka polarizer (2) arranged in the double-frequency orthogonal network (1) and connected with the double-frequency orthogonal network (1), and a Ku polarizer (3) arranged outside the double-frequency orthogonal network (1) and connected with the double-frequency orthogonal network (1), wherein the Ka polarizer (2) and the Ku polarizer (3) are coaxially arranged; a first interface of the dual-frequency orthogonal network (1) is connected with a dual-frequency loudspeaker, a second interface of the dual-frequency orthogonal network (1) is connected with a Ka polarizer (2), and a third interface of the dual-frequency orthogonal network (1) is connected with a Ku polarizer (3);

the dual-frequency orthogonal network (1) comprises a one-to-five waveguide power divider (1-1), rectangular waveguides (1-3) communicated with four rectangular waveguide channel interfaces which are distributed in a cross manner in the circumferential direction of the one-to-five waveguide power divider (1-1), and a one-to-four waveguide power divider (1-4) communicated with the four rectangular waveguides (1-3), wherein an antenna common port (8) of the one-to-five waveguide power divider (1-1) is a first interface of the dual-frequency orthogonal network (1), a circular waveguide channel interface (9) of the one-to-five waveguide power divider (1-1) is a second interface of the dual-frequency orthogonal network (1), and output interfaces of the one-to-four waveguide power divider (1-4) are third interfaces of the dual-frequency orthogonal network (1);

the Ka polarizer (2) and the Ku polarizer (3) respectively comprise a 180-degree phase shifter and a 90-degree phase shifter, and the 180-degree phase shifter and the 90-degree phase shifter can rotate along the circumferential direction;

the Ka polarizer (2) comprises a Ka frequency range orthogonal mode coupler (2-1), a Ka frequency range 180-degree phase shifter (2-4) and a Ka frequency range 90-degree phase shifter (2-2), wherein the Ka frequency range orthogonal mode coupler (2-1), the Ka frequency range 180-degree phase shifter (3-4) and the Ka frequency range 90-degree phase shifter (3-4) are sequentially communicated from the part close to the Ku polarizer (3) to the part close to the Ka polarizer (2), and the Ku frequency range 180-degree phase shifter (3-3) and the Ku frequency range 90-degree phase shifter (3-4) are sequentially communicated;

establishing a coordinate system, wherein the origin of the coordinate system is a point on the central axis of the Ku frequency range 180-degree phase shifter (3-3) and the Ku frequency range 90-degree phase shifter (3-4), and a straight line passing through the origin of the coordinate system and vertically projecting downwards to be superposed with the central line of a D output port (3-7) of the Ku frequency range orthomode coupler (3-1) is the positive direction of an X axis; passing through the origin of a coordinate system and being perpendicular to the positive direction of the X axis to form the positive direction of the Y axis, and according with a right-hand coordinate system, the included angle between the phase shift picture in the Ku frequency band 90-degree phase shifter (3-4) and the X axis of the coordinate system is the position of the phase shift picture in the Ku frequency band 90-degree phase shifter (3-4), and the included angle between the phase shift picture in the Ku frequency band 180-degree phase shifter (3-3) and the X axis of the coordinate system is the position of the phase shift picture in the Ku frequency band 180-degree phase shifter (3-3);

when the position of a phase shift picture in a Ku frequency band 180-degree phase shifter (3-3) is adjusted to be 0 degrees, 90 degrees, 180 degrees or 270 degrees, and the position of a phase shift picture in a Ku frequency band 90-degree phase shifter (3-4) is adjusted to be 45 degrees or 225 degrees, when the Ku polarizer (3) is used for receiving and transmitting, a D output port (3-7) of the Ku polarizer (3) transmits left-hand circular polarization, and an E output port (3-8) of the Ku polarizer (3) receives right-hand circular polarization; when the Ku polarizer (3) is only used for receiving, the D output port (3-7) of the Ku polarizer (3) is in a state of receiving left-hand circular polarization, and the E output port (3-8) of the Ku polarizer (3) is in a state of receiving right-hand circular polarization;

when the position of a phase shift picture in a Ku frequency band 180-degree phase shifter (3-3) is adjusted to be 0 degrees, 90 degrees, 180 degrees or 270 degrees, and the position of the phase shift picture in the Ku frequency band 90-degree phase shifter (3-4) is adjusted to be 135 degrees or 315 degrees, when the Ku polarizer (3) is used for receiving and transmitting, the D output port (3-7) of the Ku polarizer (3) transmits right-hand circular polarization, and the E output port (3-8) of the Ku polarizer (3) receives left-hand circular polarization; when the Ku polarizer (3) is only used for receiving, the D output port (3-7) of the Ku polarizer (3) is in a state of receiving right-hand circular polarization, and the E output port (3-8) of the Ku polarizer (3) is in a state of receiving left-hand circular polarization;

when the position of a phase shift picture in the Ka frequency range 180-degree phase shifter (2-4) is adjusted to be 0 degrees, 90 degrees, 180 degrees or 270 degrees, and the position of a phase shift picture in the Ka frequency range 90-degree phase shifter (2-2) is adjusted to be 45 degrees or 225 degrees, when the Ka polarizer (2) is used for receiving and transmitting, the B output port (2-7) of the Ka polarizer (2) is used for transmitting left-hand circular polarization, and the C output port (2-8) of the Ka polarizer (2) is used for receiving right-hand circular polarization; when the Ka polarizer (2) is only used for receiving, the B output port (2-7) of the Ka polarizer (2) is in a state of receiving left-hand circular polarization, and the C output port (2-8) of the Ka polarizer (2) is in a state of receiving right-hand circular polarization;

when the position of a phase shift picture in the Ka frequency range 180-degree phase shifter (2-4) is adjusted to be 0 degrees, 90 degrees, 180 degrees or 270 degrees, and the position of a phase shift picture in the Ka frequency range 90-degree phase shifter (2-2) is adjusted to be 135 degrees or 315 degrees, when the Ka polarizer (2) is used for receiving and transmitting, the B output port (2-7) of the Ka polarizer (2) is used for transmitting right-hand circular polarization, and the C output port (2-8) of the Ka polarizer (2) is used for receiving left-hand circular polarization; when the Ka polarizer (2) is only used for receiving, the B output port (2-7) of the Ka polarizer (2) is in a state of receiving right-hand circular polarization, and the C output port (2-8) of the Ka polarizer (2) is in a state of receiving left-hand circular polarization;

when the position of a phase shift picture in a Ku frequency band 90-degree phase shifter (3-4) is adjusted to be 0 degrees, 90 degrees, 180 degrees or 270 degrees, and the position of the phase shift picture in the Ku frequency band 180-degree phase shifter (3-3) is adjusted to be 45 degrees or 225 degrees, when the Ku polarizer (3) is used for receiving and transmitting, a D output port (3-7) of the Ku polarizer (3) is in a transmitting horizontal line polarization state, and an E output port (3-8) of the Ku polarizer (3) is in a receiving vertical line polarization state; when the Ku polarizer (3) is only used for receiving, the D output port (3-7) of the Ku polarizer (3) is in a receiving horizontal linear polarization state, and the E output port (3-8) of the Ku polarizer (3) is in a receiving vertical linear polarization state;

when the position of a phase shift picture in a Ku frequency band 90-degree phase shifter (3-4) is adjusted to be 0 degrees, 90 degrees, 180 degrees or 270 degrees, and the position of the phase shift picture in the Ku frequency band 180-degree phase shifter (3-3) is adjusted to be 135 degrees or 315 degrees, when the Ku polarizer (3) is used for receiving and transmitting, a D output port (3-7) of the Ku polarizer (3) is in a vertical linear polarization state, and an E output port (3-8) of the Ku polarizer (3) is in a horizontal linear polarization state; when the Ku polarizer (3) is only used for receiving, the D output port (3-7) of the Ku polarizer (3) is in a receiving vertical linear polarization state, and the E output port (3-8) of the Ku polarizer (3) is in a receiving horizontal linear polarization state;

when the position of a phase shift picture in a Ka frequency range 90-degree phase shifter (2-2) is adjusted to be 0 degrees, 90 degrees, 180 degrees or 270 degrees, and the position of a phase shift picture in a Ka frequency range 180-degree phase shifter (2-4) is adjusted to be 45 degrees or 225 degrees, when the Ka polarizer (2) is used for receiving and transmitting, the B output port (2-7) of the Ka polarizer (2) is in a transmitting horizontal line polarization state, and the C output port (2-8) of the Ka polarizer (2) is in a receiving vertical line polarization state; when the Ka polarizer (2) is only used for receiving, the B output port (2-7) of the Ka polarizer (2) is in a receiving horizontal linear polarization state, and the C output port (2-8) of the Ka polarizer (2) is in a receiving vertical linear polarization state;

when the position of a phase shift picture in a Ka frequency range 90-degree phase shifter (2-2) is adjusted to be 0 degrees, 90 degrees, 180 degrees or 270 degrees, and the position of a phase shift picture in a Ka frequency range 180-degree phase shifter (2-4) is adjusted to be 135 degrees or 315 degrees, when the Ka polarizer (2) is used for receiving and transmitting, the B output port (2-7) of the Ka polarizer (2) is in a vertical transmission linear polarization state, and the C output port (2-8) of the Ka polarizer (2) is in a horizontal receiving linear polarization state; when the Ka polarizer (2) is only used for receiving, the B output port (2-7) of the Ka polarizer (2) is in a receiving vertical linear polarization state, and the C output port (2-8) of the Ka polarizer (2) is in a receiving horizontal linear polarization state;

the one-to-five waveguide power divider (1-1) comprises an integrally formed first waveguide body, a first waveguide cavity is arranged in the first waveguide body, the first waveguide cavity comprises a transceiving main channel (8-1) communicated with an antenna common port (8), four rectangular waveguide channels communicated with the transceiving main channel (8-1) and a circular waveguide channel (9-1) communicated with the transceiving main channel (8-1), the cross section of the transceiving main channel (8-1) is gradually reduced from the joint of the four rectangular waveguide channels to the circular waveguide channel (9-1), the antenna common port (8) is communicated with the transceiving main channel (8-1), and the circular waveguide channel interface (9) is communicated with the circular waveguide channel (9-1);

the four rectangular waveguide channels are respectively a first rectangular waveguide channel (11-1), a second rectangular waveguide channel (12-1), a third rectangular waveguide channel (13-1) and a fourth rectangular waveguide channel (14-1) which are arranged on the four sides of the first waveguide body, and the four rectangular waveguide channel interfaces are respectively a first rectangular waveguide channel interface (11) communicated with the first rectangular waveguide channel (11-1), a second rectangular waveguide channel interface (12) communicated with the second rectangular waveguide channel (12-1), a third rectangular waveguide channel interface (13) communicated with the third rectangular waveguide channel (13-1) and a fourth rectangular waveguide channel interface (14) communicated with the fourth rectangular waveguide channel (14-1).

2. The dual-band satellite antenna variable polarization feed of claim 1, wherein: the four rectangular waveguide channel interfaces are respectively provided with a 90-degree rectangular twisted waveguide (1-2), the 90-degree rectangular twisted waveguides (1-2) are fixedly connected with rectangular waveguides (1-3), and the rectangular waveguide channel interfaces, the 90-degree rectangular twisted waveguides (1-2) and the rectangular waveguides (1-3) are sequentially communicated.

3. The dual-band satellite antenna variable polarization feed of claim 1, wherein: the one-to-four waveguide power divider (1-4) comprises a second waveguide body, rectangular waveguide channel branch interfaces and a circular waveguide common interface (19), wherein the rectangular waveguide channel branch interfaces are arranged on the four sides of the second waveguide body in a crossed manner, the circular waveguide common interface (19) is arranged at the end part, close to the Ku polarizer (3), of the second waveguide body, a second waveguide cavity is arranged in the second waveguide body, the second waveguide cavity comprises four rectangular waveguide branch channels and circular waveguide common channels (19-1), the four rectangular waveguide branch channels are arranged on the four sides of the second waveguide body, the circular waveguide common interface (19) is connected with the circular waveguide common channels (19-1), and the circular waveguide common interface (19) is an output interface of the one-to-four waveguide power divider (1-4);

the four rectangular waveguide sub-channels are respectively a first sub-rectangular waveguide channel (15-1), a second sub-rectangular waveguide channel (16-1), a third sub-rectangular waveguide channel (17-1) and a fourth sub-rectangular waveguide channel (18-1) which are arranged on the four sides of the second waveguide body, and the four rectangular waveguide channel sub-interfaces are respectively a first rectangular waveguide channel sub-interface (15) communicated with the first sub-rectangular waveguide channel (15-1), a second rectangular waveguide channel sub-interface (16) communicated with the second sub-rectangular waveguide channel (16-1), a third rectangular waveguide channel sub-interface (17) communicated with the third sub-rectangular waveguide channel (17-1) and a fourth rectangular waveguide channel sub-interface (18) communicated with the fourth sub-rectangular waveguide channel (18-1).

4. The dual-band satellite antenna variable polarization feed of claim 1, wherein: a plurality of supporting rods (7) uniformly distributed along the circumferential direction are arranged outside the Ku polarizer (3), the number of the rectangular waveguides (1-3) is four, the four rectangular waveguides (1-3) are uniformly distributed along the outer circumferential direction of the Ka polarizer (2), the number of the rectangular waveguides (1-3) is the same as that of the supporting rods (7), and the end parts, close to the supporting rods (7), of the rectangular waveguides (1-3) are fixedly connected with one ends of the supporting rods (7);

fixing plate (6) are sleeved outside one end, far away from Ka polarizer (2), of Ku polarizer (3), one end, far away from rectangular waveguide (1-3), of support rod (7) is installed on fixing plate (6), and one end of Ku polarizer (3) penetrates out of fixing plate (6).

5. The dual-band satellite antenna variable polarization feed of claim 1, wherein: a first circular waveguide rotary joint (2-3-1) is arranged between the Ka frequency range orthomode coupler (2-1) and the Ka frequency range 180-degree phase shifter (2-4), a second circular waveguide rotary joint (2-3-2) is arranged between the Ka frequency range 180-degree phase shifter (2-4) and the Ka frequency range 90-degree phase shifter (2-2), a third circular waveguide rotary joint (2-3-3) is arranged at one end, far away from the Ka frequency range 180-degree phase shifter (2-4), of the Ka frequency range 90-degree phase shifter (2-2), and the Ka frequency range orthomode coupler (2-1), the first circular waveguide rotary joint (2-3-1), the Ka frequency range 180-degree phase shifter (2-4), the second circular waveguide rotary joint (2-3-2), The Ka frequency range 90-degree phase shifter (2-2) is communicated with the third circular waveguide rotary joint (2-3-3).

6. The dual-band satellite antenna variable polarization feed of claim 5, wherein: one end of the first circular waveguide rotary joint (2-3-1) is fixedly connected with a Ka frequency range orthomode coupler (2-1), the other end of the first circular waveguide rotary joint (2-3-1) is fixedly connected with one end of a Ka frequency range 180-degree phase shifter (2-4), one end of the second circular waveguide rotary joint (2-3-2) is fixedly connected with the other end of the Ka frequency range 180-degree phase shifter (2-4), the other end of the second circular waveguide rotary joint (2-3-2) is fixedly connected with one end of a Ka frequency range 90-degree phase shifter (2-2), one end of the third circular waveguide rotary joint (2-3-3) is fixedly connected with the other end of the Ka frequency range 90-degree phase shifter (2-2), and the other end of the third circular waveguide rotary joint (2-3-3) is fixedly connected with a one-five-waveguide power divider (1-1) The circular waveguide channel interfaces (9) are fixedly connected.

7. The dual-band satellite antenna variable polarization feed of claim 1, wherein: a circular waveguide rotary joint I (3-2-1) is arranged between the Ku frequency band orthogonal mode coupler (3-1) and the Ku frequency band 180-degree phase shifter (3-3), a circular waveguide rotary joint II (3-2-2) is arranged between the Ku frequency band 180-degree phase shifter (3-3) and the Ku frequency band 90-degree phase shifter (3-4), a circular waveguide rotary joint III (3-2-3) is arranged at one end, away from the Ku frequency band 180-degree phase shifter (3-3), of the Ku frequency band 90-degree phase shifter (3-4), and the Ku frequency band orthogonal mode coupler (3-1), the circular waveguide rotary joint I (3-2-1), the Ku frequency band 180-degree phase shifter (3-3), the circular waveguide rotary joint II (3-2-2), the Ku frequency band 90-degree phase shifter (3-4) and the circular waveguide rotary joint III (3-2-3) are all arranged And (4) communicating.

8. The dual-band satellite antenna variable polarization feed of claim 7, wherein: one end of the circular waveguide rotary joint I (3-2-1) is fixedly connected with a Ku frequency band orthogonal mode coupler (3-1), the other end of the circular waveguide rotary joint I (3-2-1) is fixedly connected with one end of a Ku frequency band 180-degree phase shifter (3-3), one end of the circular waveguide rotary joint II (3-2-2) is fixedly connected with the other end of the Ku frequency band 180-degree phase shifter (3-3), the other end of the circular waveguide rotary joint II (3-2-2) is fixedly connected with one end of a Ku frequency band 90-degree phase shifter (3-4), one end of the circular waveguide rotary joint III (3-2-3) is fixedly connected with the other end of the Ku frequency band 90-degree phase shifter (3-4), and the other end of the circular waveguide rotary joint III (3-2-3) is connected with an output interface of a one-four-wave guide power divider (1-4) And (6) connecting.

9. The dual-band satellite antenna variable polarization feed of claim 1, wherein: a first BJ320 waveguide (5) is arranged at a B output port (2-7) of the Ka polarizer (2), a first BJ220 waveguide (4) is arranged at a C output port (2-8) of the Ka polarizer (2), the B output port (2-7) of the Ka polarizer (2) is connected with a Ka frequency band transmitter through the first BJ320 waveguide (5), and the C output port (2-8) of the Ka polarizer (2) is connected with a Ka frequency band receiver through the first BJ220 waveguide (4);

a D output port (3-7) of the Ku polarizer (3) is provided with a first BJ120 waveguide, an E output port (3-8) of the Ku polarizer is provided with a second BJ120 waveguide, the D output port (3-7) of the Ku polarizer is connected with a Ku frequency band transmitter through the first BJ120 waveguide, and the E output port (3-8) of the Ku polarizer is connected with a Ku frequency band receiver through the second BJ120 waveguide.