Anti-interference waveguide feed source network

Abstract

The invention provides an anti-interference waveguide feed source network, and belongs to the technical field of satellite communication. The anti-interference waveguide feed source network comprises a TX duplexer and an RX duplexer, the TX duplexer comprises a first high-pass filtering branch and a first low-pass filtering branch, the first end of the first high-pass filtering branch is used for receiving a TX input signal, and the second end of the first high-pass filtering branch is connected with the first end of the first low-pass filtering branch; the second end of the first low-pass filtering shunt is provided with a first wave absorbing load used for absorbing a transmitting signal of the RX duplexer; the RX duplexer comprises a second high-pass filtering branch and a second low-pass filtering branch, the first end of the second low-pass filtering branch is used for receiving an RX input signal, and the first end of the second low-pass filtering branch is further connected with the first end of the second high-pass filtering branch; the second end of the second high-pass filtering branch is provided with a second wave-absorbing load used for absorbing a transmitting signal of the TX duplexer. According to the invention, the condition that the signal quality of the feed source network becomes poor due to signal leakage can be improved.

Description

Technical Field

[0001] This application relates to the field of satellite communication technology, and particularly to an anti-interference waveguide feed network. Background Art

[0002] Ka-band satellite communication technology refers to the technology of using the Ka-band (26.5 - 40 GHz) spectrum for signal transmission in a satellite communication system. With the increasing communication demands, especially in high-speed data transmission and high-capacity communication, the Ka-band has become an important choice for satellite communication. Currently, the Ka-band waveguide feed network is relatively mature. Most of the satellite communications in the Ka-band are circularly polarized signals. After passing through a septum phase shifter, they are respectively connected to the receiving and transmitting waveguide ports. However, in actual applications, due to errors in engineering machinery processing and assembly, certain signal leakage will occur at the position of the septum phase shifter, affecting the signal phase and interfering with the signal quality. Summary of the Invention

[0003] The embodiments of this application provide an anti-interference waveguide feed network to solve the problem of poor signal quality caused by signal leakage generated at the septum phase shifter when receiving or transmitting signals.

[0004] The embodiments of this application provide an anti-interference waveguide feed network, including: TX diplexer, RX diplexer; The TX diplexer includes a first high-pass filtering branch and a first low-pass filtering branch. The first end of the first high-pass filtering branch is used to receive the TX input signal. The second end of the first high-pass filtering branch is connected to the first end of the first low-pass filtering branch. The second end of the first high-pass filtering branch is used to transfer the TX input signal to the TX waveguide outlet of the TX diplexer; A first wave-absorbing load for absorbing the transmitted signal of the RX diplexer is provided at the second end of the first low-pass filtering branch; The RX diplexer includes a second high-pass filtering branch and a second low-pass filtering branch. The first end of the second low-pass filtering branch is used to receive the RX input signal. The first end of the second low-pass filtering branch is also connected to the first end of the second high-pass filtering branch. The second end of the second low-pass filtering branch is used to transfer the RX input signal to the RX waveguide outlet of the RX diplexer; A second wave-absorbing load for absorbing the transmitted signal of the TX diplexer is provided at the second end of the second high-pass filtering branch.

[0005] In an exemplary embodiment of this application, the first high-pass filtering branch includes a first waveguide unit, a second waveguide unit, and a first E-plane bend waveguide; The first end of the first waveguide unit is used to transfer the TX input signal to the TX waveguide outlet of the TX diplexer; The second end of the first waveguide unit is connected to the first end of the first E-plane bent waveguide, the second end of the first E-plane bent waveguide is connected to the first end of the second waveguide unit, and the second end of the second waveguide unit is for receiving a TX input signal.

[0006] In an exemplary embodiment of the present application, the first low-pass filtering and splitting section includes a third waveguide unit, a fourth waveguide unit, a second E-plane bent waveguide, and a third E-plane bent waveguide; The first end of the third waveguide unit is connected to the second end of the first high-pass filtering and splitting section, the second end of the third waveguide unit is connected to the first end of the second E-plane bent waveguide, the second end of the second E-plane bent waveguide is connected to the first end of the third E-plane bent waveguide, the second end of the third E-plane bent waveguide is connected to the first end of the fourth waveguide unit, and a first absorbing load is provided at the second end of the fourth waveguide unit.

[0007] In an exemplary embodiment of the present application, the second low-pass filtering and splitting section includes n waveguide units connected in sequence.

[0008] In an exemplary embodiment of the present application, the second high-pass filtering and splitting section includes m waveguide units connected in sequence, and a second absorbing load is provided at the output end of the mth waveguide unit.

[0009] In an exemplary embodiment of the present application, the TX waveguide outlet of the TX duplexer and the RX inlet of the RX duplexer are both disposed in the same plane and are both in communication with the feed through a partition phase shifter.

[0010] In an exemplary embodiment of the present application, the TX duplexer is formed by splicing two symmetric first structural members and second structural members; A first welding rod and a second welding rod are welded outside the splicing line of the first structural member and the second structural member, the first welding rod and the second welding rod are disconnected at the TX waveguide outlet of the TX duplexer, and the first welding rod and the second welding rod are disconnected at the TX inlet of the TX duplexer; The first structural member and the second structural member are also fixed by a plurality of screws in a direction perpendicular to the splicing line.

[0011] In an exemplary embodiment of the present application, the RX duplexer is formed by splicing two symmetric third structural members and fourth structural members; A third welding rod and a fourth welding rod are welded outside the splicing line of the third structural member and the fourth structural member, the third welding rod and the fourth welding rod are disconnected at the RX waveguide outlet of the RX duplexer, and the third welding rod and the fourth welding rod are disconnected at the RX inlet of the RX duplexer; The third structural member and the fourth structural member are also fixed by a plurality of screws in a direction perpendicular to the splicing line.

[0012] In an exemplary embodiment of the present application, both the first absorbing load and the second absorbing load are wedge-shaped absorbing loads.

[0013] In an exemplary embodiment of the present application, each waveguide unit includes a rectangular resonant cavity.

[0014] The beneficial effect of the anti-interference waveguide feed network provided by the embodiment of the present application is as follows: In this embodiment, a TX duplexer is provided at the transmitting port. The absorbing load of the TX duplexer can absorb the leakage signals in the receiving frequency band and eliminate the reflection of the received signals. At the same time, an RX duplexer is designed at the receiving port. The absorbing load of the RX duplexer can absorb the leakage signals in the transmitting frequency band and eliminate the reflection of the transmitted signals, thereby improving the signal leakage caused by factors such as tolerances and assembly accuracy not being in place, and further eliminating the adverse effects of the resulting deterioration of the signal quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a schematic diagram of the principle of the existing Ka-band waveguide feed network; Figure 2 is a front view of the engineering design drawing of the Ka-band waveguide feed network in the prior art; Figure 3 is a cross-sectional view of the engineering design drawing of the Ka-band waveguide feed network in the prior art; Figure 4 is the high-pass filter of the Ka-band waveguide feed network in the prior art; Figure 5 is the curve graph of the high-pass filter of the Ka-band waveguide feed network in the prior art; Figure 6 is the low-pass filter of the Ka-band waveguide feed network in the prior art; Figure 7 is the curve graph of the low-pass filter of the Ka-band waveguide feed network in the prior art; Figure 8 is a schematic diagram of the interference in the transmitting frequency band of the Ka-band waveguide feed network; Figure 9 is a schematic diagram of the interference in the receiving frequency band of the Ka-band waveguide feed network; Figure 10 It is a schematic diagram of the overall front structure of the anti-interference waveguide feed network provided by the embodiment of the present application; Figure 11 It is a schematic diagram of the overall side structure of the anti-interference waveguide feed network provided by the embodiment of the present application; Figure 12 It is a model diagram of the TX duplexer of the anti-interference waveguide feed network provided by the embodiment of the present application; Figure 13 It is a layout diagram of the TX duplexer of the anti-interference waveguide feed network provided by the embodiment of the present application; Figure 14 It is a structural diagram of the TX duplexer of the first anti-interference waveguide feed network provided by the embodiment of the present application; Figure 15 It is a structural diagram of the TX duplexer of the second anti-interference waveguide feed network provided by the embodiment of the present application; Figure 16 It is a fixed diagram of the TX duplexer structure of the first anti-interference waveguide feed network provided by the embodiment of the present application; Figure 17 It is a fixed diagram of the TX duplexer structure of the second anti-interference waveguide feed network provided by the embodiment of the present application; Figure 18 It is a curve diagram of the TX duplexer of the anti-interference waveguide feed network provided by the embodiment of the present application; Figure 19 It is a schematic diagram of the transmitting waveguide port and the TX duplexer of the anti-interference waveguide feed network provided by the embodiment of the present application; Figure 20 It is a model diagram of the RX duplexer of the anti-interference waveguide feed network provided by the embodiment of the present application; Figure 21 It is a layout diagram of the RX duplexer of the anti-interference waveguide feed network provided by the embodiment of the present application; Figure 22 It is a structural diagram of the RX duplexer of the first anti-interference waveguide feed network provided by the embodiment of the present application; Figure 23 It is a structural diagram of the RX duplexer of the second anti-interference waveguide feed network provided by the embodiment of the present application; Figure 24 It is a fixed diagram of the RX duplexer structure of the first anti-interference waveguide feed network provided by the embodiment of the present application; Figure 25 It is a fixed diagram of the RX duplexer structure of the second anti-interference waveguide feed network provided by the embodiment of the present application; Figure 26 It is a curve diagram of the RX duplexer of the anti-interference waveguide feed network provided by the embodiment of the present application; Figure 27It is a schematic diagram of the receiving waveguide port and RX duplexer of the anti-interference waveguide feed network provided by the embodiments of the present application. Detailed implementation manners

[0017] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below in conjunction with the accompanying drawings in the embodiments of this solution. Obviously, the described embodiments are some, rather than all, of the embodiments of this solution. Based on the embodiments in this solution, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this solution.

[0018] The term "including" in the specification, claims and above-mentioned accompanying drawings of this solution, as well as any other deformation, means "including but not limited to", and is intended to cover non-exclusive inclusion, not limited to the examples listed in the text. In addition, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order.

[0019] The implementation of this application will be described in detail below in conjunction with specific accompanying drawings: First, refer to Figure 1 , Figure 1 which is a schematic diagram of the principle of an existing Ka-band waveguide feed network. In the figure, the thicker lines represent the transmitted output signals, and the thinner lines represent the received input signals. The feed transceiver circularly polarized signals are respectively connected to the transmit waveguide outlet and the receive inlet through the partition phase shifter. In actual engineering applications, a high-pass filter corresponding to the transmit waveguide port and a low-pass filter corresponding to the receive waveguide port will be designed respectively. Refer to Figure 2 and Figure 3 . Among them, TX represents transmit, and RX represents receive. Through a compact receive design, the waveguide ports of the waveguide docking partition phase shifter in this engineering design drawing are designed on the same plane, which is convenient for assembly.

[0020] In actual applications, the high-pass filter used at the transmit port has a transmit pass frequency of 27.5 - 31 GHz, and this high-pass filter will suppress the receive band frequency of 17.7 - 21.2 GHz. The high-pass filter model and curve refer to Figure 4 and Figure 5 . The low-pass filter used at the receive port in actual applications has a receive pass frequency of 17.7 - 21.2 GHz. This low-pass filter will suppress the transmit band frequency of 27.5 - 31 GHz. The low-pass filter model and curve refer to Figure 6 and Figure 7 .

[0021] When the above two high-pass and low-pass filters are used in combination, in an ideal state, the isolation of the Ka-band waveguide feed network for transceiver can be effectively achieved. However, the inventor found in actual applications that due to errors in engineering machinery processing and assembly, certain signal leakage will occur.

[0022] Taking the transmitted signal as an example, referring to Figure 8 , the signal transmitted and output may leak to the receiving port at the partition phase shifter, and the low-pass filter corresponding to the receiving port totally reflects the transmitted frequency band. Then, the reflected transmitted signal will be superimposed on the normally output signal, causing phase interference and affecting the quality of the output signal.

[0023] Figure 8 The thick solid line in Figure 8 is the normally output transmitted signal, and the thin solid line is the transmitted signal leaked to the receiving port and the reflection of the transmitted signal at the receiving port. As shown in

[0024] Taking the received signal as an example, referring to Figure 9 , it may leak to the transmitting waveguide port at the partition phase shifter. The high-pass filter at the transmitting waveguide port totally reflects the received frequency band. Then, the finally reflected received signal will be superimposed on the normal received signal and enter the receiving waveguide port, affecting the phase of the signal and interfering with the signal quality.

[0025] Figure 9 The thin dotted line in

[0026] is the received signal, and the thin solid line is the signal leaked to the transmitting waveguide port and the signal reflected at the high-pass filter at the transmitting waveguide port. The finally signal entering the receiver is the superposition of the thin dotted line received signal and the thin solid line reflected received signal.

[0027] Figure 10 FIG. Figure 11 is a schematic diagram of the overall front structure of the anti-interference waveguide feed network provided by an embodiment of the present application. Figure 10 and Figure 11 FIG.

[0028] Figure 10 and Figure 11 are schematic diagrams of the overall side structure of the anti-interference waveguide feed network provided by an embodiment of the present application. Referring to Figure 10 and Figure 11 , the anti-interference waveguide feed network includes: a TX duplexer and an RX duplexer. Each of the two duplexers includes a high-pass filtering branch and a low-pass filtering branch. The TX waveguide outlet of the TX duplexer and the RX inlet of the RX duplexer are both arranged on the same plane and are both in communication with the feed through a partition phase shifter.

[0028] In this embodiment, the TX duplexer is mainly used to transmit frequency band signals through the TX waveguide outlet (common port). The TX waveguide outlet of the TX duplexer is used to connect to the septum phase shifter, and the TX inlet of the TX duplexer is the waveguide port through which the transmitted signal enters. In this embodiment, the leakage signal in the receiving frequency band can be input at the common port and enter the absorbing load of the TX duplexer, and this absorbing load can eliminate the reflection of the received signal.

[0029] In this embodiment, referring to Figures 12 - 13 , the TX duplexer includes a first high-pass filtering branch and a first low-pass filtering branch. The first end of the first high-pass filtering branch is used to receive the TX input signal, the second end of the first high-pass filtering branch is connected to the first end of the first low-pass filtering branch, and the second end of the first high-pass filtering branch is used to transfer the TX input signal to the TX waveguide outlet of the TX duplexer.

[0030] The second end of the first low-pass filtering branch is provided with a first absorbing load for absorbing the transmitted signal of the RX duplexer.

[0031] In this embodiment, the first high-pass filtering branch includes a first waveguide unit, a second waveguide unit, and a first E-plane bent waveguide; the first end of the first waveguide unit is used to transfer the TX input signal to the TX waveguide outlet of the TX duplexer.

[0032] The second end of the first waveguide unit is connected to the first end of the first E-plane bent waveguide, the second end of the first E-plane bent waveguide is connected to the first end of the second waveguide unit, and the second end of the second waveguide unit is used to receive the TX input signal.

[0033] The first waveguide unit in this embodiment includes two resonant cavities, and the second waveguide unit includes four resonant cavities, that is, the first high-pass filtering branch includes six resonant cavities and an E-plane bent waveguide. This first high-pass filtering branch can allow waves with a frequency of 27.5 - 31 GHz to pass through. In this embodiment, a resonant cavity is a device used to generate and maintain electromagnetic oscillations, usually formed by enclosing a part of a waveguide. The shape of the resonant cavity can be various regular shapes such as rectangular, cylindrical, etc., and different shaped resonant cavities have different electromagnetic characteristics. The size of the cavity is closely related to the working wavelength. Generally speaking, the dimensions such as the length, width, and height of the cavity will be designed according to the required resonant frequency, usually being an integer multiple or a half-integer multiple of the working wavelength.

[0034] The working principle of the resonant cavity is: When electromagnetic waves propagate in the waveguide and enter the resonant cavity, they will reflect back and forth in the cavity. Due to the reflection of the electromagnetic waves by the cavity walls, standing waves are formed in the cavity.

[0035] When the size of the cavity meets certain conditions, electromagnetic waves of a specific frequency will resonate in the cavity, that is, the electromagnetic waves of this frequency can continuously exist in the cavity and form a stable electromagnetic field distribution, while electromagnetic waves of other frequencies will decay quickly. This is because at the resonant frequency, the propagation of electromagnetic waves in the cavity satisfies a certain phase relationship, enabling the reflected wave and the incident wave to reinforce each other, thus forming a stable oscillation. The resonant cavity can select electromagnetic waves of a specific frequency from numerous frequencies of electromagnetic waves, making them resonate in the cavity while suppressing electromagnetic waves of other frequencies, thereby playing the role of frequency selection.

[0036] In this embodiment, the first low-pass filtering shunt includes a third waveguide unit, a fourth waveguide unit, a second E-plane bent waveguide, and a third E-plane bent waveguide.

[0037] The first end of the third waveguide unit is connected to the second end of the first high-pass filtering shunt, the second end of the third waveguide unit is connected to the first end of the second E-plane bent waveguide, the second end of the second E-plane bent waveguide is connected to the first end of the third E-plane bent waveguide, the second end of the third E-plane bent waveguide is connected to the first end of the fourth waveguide unit, and a first absorbing load is provided at the second end of the fourth waveguide unit.

[0038] The third waveguide unit in this embodiment includes three resonant cavities, and the fourth waveguide unit includes one resonant cavity, that is, the entire first low-pass filtering shunt includes four resonant cavities and two E-plane bent waveguides. Among them, a wedge-shaped absorbing load is provided at the end of the fourth waveguide unit, which can absorb the signals leaked by the RX duplexer and realize the function of preventing signal reflection. The resonant frequency of the cavity can be set in this embodiment to make the resonant frequency of the cavity lower than 27.5 GHz, thereby improving the isolation degree and optimizing the passband performance, and finally achieving better matching isolation and suppression of this high-pass filtering shunt.

[0039] Reference Figures 14 - 18 , the TX duplexer is spliced by two symmetrical first structural members and second structural members. First electrodes and second electrodes are welded outside the splicing line of the first structural member and the second structural member. The first electrodes and the second electrodes are disconnected at the TX waveguide outlet of the TX duplexer, and the first electrodes and the second electrodes are disconnected at the TX inlet of the TX duplexer; the first structural member and the second structural member are also fixed by a plurality of screws in the direction perpendicular to the splicing line.

[0040] In this embodiment, when the TX duplexer is installed, it is first fastened with screws. Considering the requirement of small volume, the number of screws should not be too many, and then two electrodes are used to weld the two components together to prevent electric field leakage. Reference Figure 19 , after adding the duplexer at the transmitting waveguide port (TX waveguide outlet), the received signals leaked from the receiving port to the transmitting port can enter the RX-band absorbing load (the first absorbing load) through the duplexer, eliminating the reflection of the received signals.

[0041] In one embodiment of the present disclosure, referring to Figures 20 - 21 , the RX duplexer includes a second high-pass filtering splitter and a second low-pass filtering splitter. The first end of the second low-pass filtering splitter is used to receive the RX input signal. The first end of the second low-pass filtering splitter is also connected to the first end of the second high-pass filtering splitter. The second end of the second low-pass filtering splitter is used to transfer the RX input signal to the RX waveguide outlet of the RX duplexer; The second end of the second high-pass filtering splitter is provided with a second absorbing load for absorbing the transmitted signal of the TX duplexer.

[0042] In this embodiment, the second low-pass filtering splitter includes n waveguide units connected in sequence. The second high-pass filtering splitter includes m waveguide units connected in sequence. The output end of the mth waveguide unit is provided with a second absorbing load. In this embodiment, n can be 7 and m can be 3. Each waveguide unit has a resonant cavity. By setting the resonant frequency of the resonant cavity, in this embodiment, the resonant frequency of the resonant cavity of the second low-pass filtering splitter can be made lower than 27.5 GHz, and finally the low-pass characteristic is achieved. By setting the frequency of the resonant cavity, in this embodiment, the second high-pass filtering splitter can generate stronger reflection and attenuation for the receiving frequency band, and the resonant cavity frequency is set within the transmitting frequency band to achieve better performance. At the same time, a wedge-shaped absorbing load is placed at the end of the second high-pass filtering splitter to achieve the anti-reflection characteristic.

[0043] In this embodiment, referring to Figures 22 - 26 , the RX duplexer is formed by splicing two symmetrical third structural members and fourth structural members; Third welding rods and fourth welding rods are welded outside the splicing line of the third structural member and the fourth structural member. The third welding rods and the fourth welding rods are disconnected at the RX waveguide outlet of the RX duplexer, and the third welding rods and the fourth welding rods are disconnected at the RX inlet of the RX duplexer; The third structural member and the fourth structural member are also fixed by a plurality of screws in a direction perpendicular to the splicing line.

[0044] The installation process of the RX duplexer in this embodiment is the same as that of the TX duplexer. First, use screws to fasten. Because of the requirement of small volume, the number of screws should not be too many. Then use two welding rods to weld the two components together to prevent electric field leakage. Referring to Figure 27 , after adding a duplexer at the receiving waveguide port (RX waveguide inlet), the transmitted signal leaked from the transmitting port to the receiving waveguide port can enter the TX band absorbing load (second absorbing load) through the duplexer, eliminating the reflection of the transmitted signal.

[0045] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An anti-interference waveguide feed network, characterized in that: include: TX duplexer, RX duplexer; The TX duplexer comprises a first high-pass filter branch and a first low-pass filter branch, wherein a first end of the first high-pass filter branch is used to receive a TX input signal, a second end of the first high-pass filter branch is connected to a first end of the first low-pass filter branch, and a second end of the first high-pass filter branch is used to transmit the TX input signal to a TX waveguide outlet of the TX duplexer; The second end of the first low-pass filter branch is provided with a first absorbing load for absorbing the transmission signal of the RX duplexer; The RX duplexer comprises a second high-pass filter branch and a second low-pass filter branch, wherein a first end of the second low-pass filter branch is used to receive an RX input signal, a first end of the second low-pass filter branch is further connected to a first end of the second high-pass filter branch, and a second end of the second low-pass filter branch is used to transmit the RX input signal to an RX waveguide outlet of the RX duplexer; The second end of the second high-pass filter branch is provided with a second absorbing load for absorbing the transmission signal of the TX duplexer.

2. The anti-interference waveguide feed network according to claim 1, characterized in that: The first high-pass filter branch includes a first waveguide unit, a second waveguide unit and a first E-plane bent waveguide; The first end of the first waveguide unit is used to transmit the TX input signal to the TX waveguide outlet of the TX duplexer; The second end of the first waveguide unit is connected to the first end of the first E-plane bent waveguide, the second end of the first E-plane bent waveguide is connected to the first end of the second waveguide unit, and the second end of the second waveguide unit is used to receive a TX input signal.

3. The anti-interference waveguide feed network according to claim 1, characterized in that: The first low-pass filter branch includes a third waveguide unit, a fourth waveguide unit, a second E-plane bent waveguide and a third E-plane bent waveguide; The first end of the third waveguide unit is connected to the second end of the first high-pass filter branch, the second end of the third waveguide unit is connected to the first end of the second E-plane curved waveguide, the second end of the second E-plane curved waveguide is connected to the first end of the third E-plane curved waveguide, the second end of the third E-plane curved waveguide is connected to the first end of the fourth waveguide unit, and the second end of the fourth waveguide unit is provided with a first absorbing load.

4. The anti-interference waveguide feed network according to claim 1, characterized in that: The second low-pass filtering branch includes n waveguide units connected in sequence.

5. The anti-interference waveguide feed network according to claim 1, characterized in that: The second high-pass filtering branch includes m waveguide units connected in sequence, and the output end of the m-th waveguide unit is provided with a second wave absorbing load.

6. The anti-interference waveguide feed network according to claim 1, characterized in that: The TX waveguide outlet of the TX duplexer and the RX inlet of the RX duplexer are both arranged in the same plane, and both communicate with the feed source through the partition phase shifter.

7. The anti-interference waveguide feed network according to claim 1, characterized in that: The TX duplexer is formed by splicing two symmetrical first structural members and a second structural member; A first welding rod and a second welding rod are welded on the outer side of the splicing line between the first structural member and the second structural member, the first welding rod and the second welding rod are disconnected at the TX waveguide outlet of the TX duplexer, and the first welding rod and the second welding rod are disconnected at the TX inlet of the TX duplexer; The first structural member and the second structural member are also fixed by a plurality of screws in a direction perpendicular to the splicing line.

8. The anti-interference waveguide feed network according to claim 1, characterized in that: The RX duplexer is formed by splicing two symmetrical third structural members and a fourth structural member; A third welding rod and a fourth welding rod are welded on the outer side of the splicing line between the third structural member and the fourth structural member, the third welding rod and the fourth welding rod are disconnected at the RX waveguide outlet of the RX duplexer, and the third welding rod and the fourth welding rod are disconnected at the RX inlet of the RX duplexer; The third structural member and the fourth structural member are also fixed by a plurality of screws in a direction perpendicular to the splicing line.

9. The anti-interference waveguide feed network according to claim 1, characterized in that: The first absorbing load and the second absorbing load are both wedge-shaped absorbing loads.

10. The anti-interference waveguide feed network according to claim 4 or 5, characterized in that: Each waveguide unit includes a rectangular resonant cavity.

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