Anti-interference waveguide feed network system

Abstract

The present application provides an anti-interference waveguide feed network system, which belongs to the field of satellite communication technology. The system includes: a TX duplexer and an RX duplexer; the TX duplexer includes a first high-pass filter branch and a first low-pass filter branch, the first end of the first high-pass filter branch is used to receive the TX input signal, and the second end of the first high-pass filter branch is connected to the first end of the first low-pass filter branch; 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 includes a second high-pass filter branch and a second low-pass filter branch, the first end of the second low-pass filter branch is used to receive the RX input signal, and the first end of the second low-pass filter branch is also connected to the first end of the second high-pass filter branch; 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. The present application can improve the situation where the signal quality of the feed network deteriorates due to signal leakage.

Description

Technical Field

[0001] The present application relates to the field of satellite communication technology, and in particular to an anti-interference waveguide feed network system. Background Art

[0002] Ka-band satellite communication technology refers to the use of the Ka-band (26.5-40 GHz) spectrum for signal transmission within satellite communication systems. With increasing communication demands, particularly for high-speed data transmission and high-capacity communications, the Ka-band has become a key choice for satellite communications. Currently, Ka-band waveguide feed networks are relatively mature. Ka-band satellite communications primarily utilize circularly polarized signals, which pass through bulkhead phase shifters and are then connected to the receive and transmit waveguide ports, respectively. However, in actual applications, due to machining and assembly errors in engineering machinery, some signal leakage can occur at the bulkhead phase shifter locations, affecting the signal phase and interfering with signal quality. Summary of the Invention

[0003] An embodiment of the present application provides an anti-interference waveguide feed network system to solve the problem of poor signal quality caused by signal leakage at a partition phase shifter when receiving or transmitting a signal.

[0004] An embodiment of the present application provides an anti-interference waveguide feed network system, comprising:

[0005] TX duplexer, RX duplexer;

[0006] The TX duplexer includes 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 the first end of the first low-pass filter branch, and the second end of the first high-pass filter branch is used to transmit the TX input signal to the TX waveguide outlet of the TX duplexer;

[0007] 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;

[0008] The RX duplexer includes 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, the first end of the second low-pass filter branch is further connected to the first end of the second high-pass filter branch, and the second end of the second low-pass filter branch is used to transmit the RX input signal to the RX waveguide outlet of the RX duplexer;

[0009] A second absorbing load for absorbing the transmission signal of the TX duplexer is provided at the second end of the second high-pass filter branch.

[0010] In an exemplary embodiment of the present application, the first high-pass filtering branch includes a first waveguide unit, a second waveguide unit and a first E-plane bent waveguide;

[0011] 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;

[0012] The second end of the first waveguide unit is connected to the first end of the first E-plane bend waveguide, the second end of the first E-plane bend 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.

[0013] In an exemplary embodiment of the present application, the first low-pass filtering branch includes a third waveguide unit, a fourth waveguide unit, a second E-plane bent waveguide and a third E-plane bent waveguide;

[0014] 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.

[0015] In an exemplary embodiment of the present application, the second low-pass filtering branch includes n waveguide units connected in sequence.

[0016] In an exemplary embodiment of the present application, 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 absorbing load.

[0017] 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 arranged in the same plane, and both communicate with the feed source through a partition phase shifter.

[0018] In an exemplary embodiment of the present application, the TX duplexer is formed by splicing two symmetrical first structural members and a second structural member;

[0019] A first welding rod and a second welding rod are welded on the outer side of a 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;

[0020] The first structural member and the second structural member are further fixed by a plurality of screws in a direction perpendicular to the splicing line.

[0021] In an exemplary embodiment of the present application, the RX duplexer is formed by splicing two symmetrical third structural members and a fourth structural member;

[0022] 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;

[0023] The third structural member and the fourth structural member are further fixed by a plurality of screws in a direction perpendicular to the splicing line.

[0024] In an exemplary embodiment of the present application, the first absorbing load and the second absorbing load are both wedge-shaped absorbing loads.

[0025] In an exemplary embodiment of the present application, each waveguide unit includes a rectangular resonant cavity.

[0026] The embodiments of the present application provide an anti-interference waveguide feed network system having the following beneficial effects:

[0027] In this embodiment, a TX duplexer is provided at the transmit port. The TX duplexer's absorbing load can absorb leakage signals in the receive frequency band and eliminate receive signal reflections. At the same time, an RX duplexer is designed at the receive port. The RX duplexer's absorbing load can absorb leakage signals in the transmit frequency band and eliminate transmit signal reflections. This improves the adverse effects of signal quality degradation caused by signal leakage due to tolerances and inadequate assembly precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is the principle block diagram of the existing Ka-band waveguide feed network;

[0030] Figure 2 It is a front view of a Ka-band waveguide feed network engineering design diagram in the prior art;

[0031] Figure 3 It is a cross-sectional view of a Ka-band waveguide feed network engineering design diagram in the prior art;

[0032] Figure 4 It is a Ka-band waveguide feed network high-pass filter in the prior art;

[0033] Figure 5 It is a curve diagram of a Ka-band waveguide feed network high-pass filter in the prior art;

[0034] Figure 6 It is a Ka-band waveguide feed network low-pass filter in the prior art;

[0035] Figure 7 It is a curve diagram of the Ka-band waveguide feed network low-pass filter in the prior art;

[0036] Figure 8 This is a schematic diagram of Ka-band waveguide feed network transmission frequency band interference;

[0037] Figure 9 This is a schematic diagram of the Ka-band waveguide feed network receiving band interference;

[0038] Figure 10 1 is a schematic diagram of the overall front structure of the anti-interference waveguide feed network system provided in an embodiment of the present application;

[0039] Figure 11 1 is a schematic side view of the overall structure of the anti-interference waveguide feed network system provided in an embodiment of the present application;

[0040] Figure 12 This is a diagram of a TX duplexer model of an anti-interference waveguide feed network system provided in an embodiment of the present application;

[0041] Figure 13 This is a TX duplexer layout diagram of the anti-interference waveguide feed network system provided by an embodiment of the present application;

[0042] Figure 14 This is a structural diagram of a TX duplexer of a first anti-interference waveguide feed network system provided by an embodiment of the present application;

[0043] Figure 15 This is a structural diagram of a TX duplexer of a second anti-interference waveguide feed network system provided in an embodiment of the present application;

[0044] Figure 16 This is a fixed diagram of the TX duplexer structure of the first anti-interference waveguide feed network system provided by an embodiment of the present application;

[0045] Figure 17 This is a fixed diagram of the TX duplexer structure of the second anti-interference waveguide feed network system provided by an embodiment of the present application;

[0046] Figure 18 This is a TX duplexer curve diagram of the anti-interference waveguide feed network system provided by an embodiment of the present application;

[0047] Figure 19Schematic diagram of the transmitting waveguide port and TX duplexer of the anti-interference waveguide feed network system provided by an embodiment of the present application;

[0048] Figure 20 This is a diagram of the RX duplexer model of the anti-interference waveguide feed network system provided by an embodiment of the present application;

[0049] Figure 21 This is a layout diagram of an RX duplexer of an anti-interference waveguide feed network system provided in an embodiment of the present application;

[0050] Figure 22 This is a structural diagram of an RX duplexer of a first anti-interference waveguide feed network system provided by an embodiment of the present application;

[0051] Figure 23 This is a structural diagram of an RX duplexer of a second anti-interference waveguide feed network system provided in an embodiment of the present application;

[0052] Figure 24 This is a fixed diagram of the RX duplexer structure of the first anti-interference waveguide feed network system provided by an embodiment of the present application;

[0053] Figure 25 This is a fixed diagram of the RX duplexer structure of the second anti-interference waveguide feed network system provided by an embodiment of the present application;

[0054] Figure 26 This is a graph of the RX duplexer of the anti-interference waveguide feed network system provided by an embodiment of the present application;

[0055] Figure 27 This is a schematic diagram of the receiving waveguide port and RX duplexer of the anti-interference waveguide feed network system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] To help those skilled in the art better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of this solution, not all of it. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this solution.

[0057] Throughout the specification, claims, and accompanying figures of this solution, the term "including" and any variations thereof mean "including, but not limited to," and are intended to cover non-exclusive inclusions and are not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish between different objects, not to describe a specific order.

[0058] The following is a detailed description of the implementation of this application with reference to the accompanying drawings:

[0059] First reference Figure 1 , Figure 1 This is a block diagram of the principle of the existing Ka-band waveguide feed network. In the figure, the thicker lines represent the transmit output signal, and the thinner lines represent the receive input signal. The feed source transmits and receives circularly polarized signals through a partition phase shifter, connecting the transmit waveguide outlet and the receive inlet respectively. In actual engineering applications, a high-pass filter corresponding to the transmit waveguide outlet and a low-pass filter corresponding to the receive waveguide outlet will be designed separately. Figure 2 and Figure 3 TX stands for transmit, and RX stands for receive. This engineering design utilizes a compact receiver design, placing the waveguide ports of the waveguide docking bulkhead phase shifter on the same plane for easy assembly.

[0060] In actual applications, the high-pass filter used in the transmit port has a transmit pass frequency of 27.5~31GHz, and this high-pass filter will suppress the receive frequency band of 17.7~21.2GHz. High-pass filter model and curve reference Figure 4 and Figure 5 The receiving port in actual application uses a low-pass filter, whose receiving pass frequency is 17.7~21.2GHz. This low-pass filter will suppress the transmit frequency band of 27.5~31GHz. Low-pass filter model and curve reference Figure 6 and Figure 7 .

[0061] The above two high-pass and low-pass filters are used together, and under ideal conditions, they can effectively achieve isolation between the Ka-band waveguide feed network and the transmitter and receiver. In actual applications, the inventors found that errors in engineering machinery processing and assembly would cause certain signal leakage.

[0062] Take the transmitted signal as an example, refer to Figure 8 The transmitted output signal may leak to the receiving entrance at the partition phase shifter, and the low-pass filter corresponding to the receiving entrance fully reflects the transmitting frequency band. The reflected transmitted signal will be superimposed on the normal output signal, causing phase interference and affecting the output signal quality.

[0063] Figure 8 The thick solid line is the normal output signal of the transmitter, and the thin solid line is the leakage of the transmitter to the receiving entrance and the reflection of the transmitter signal at the receiving entrance. Figure 8 As shown, the final transmission output signal is the ideal transmission output signal superimposed with the reflected thin solid line signal.

[0064] Taking the received signal as an example, refer 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 fully reflects the receiving frequency band, and the reflected receiving signal will eventually be superimposed on the normal receiving signal and enter the receiving waveguide port, affecting the signal phase and interfering with the signal quality.

[0065] Figure 9 The thin dashed line in the figure represents the received signal, while the thin solid line represents the signal leaking into the transmit waveguide port and the signal reflected by the high-pass filter at the transmit waveguide port. The signal that ultimately reaches the receiver is the sum of the thin dashed received signal and the thin solid reflected signal.

[0066] Taking the above two situations into consideration, the inventors of this application designed duplexers for the high-pass and low-pass filters respectively while maintaining substantially the same volume, and used them in conjunction with absorbing materials as loads to improve the adverse effects of leakage caused by tolerances and inadequate assembly precision, which in turn leads to deterioration in signal quality.

[0067] Figure 10 This is a schematic diagram of the overall front structure of the anti-interference waveguide feed network system provided in an embodiment of the present application. Figure 11 This is a schematic diagram of the overall structure of the anti-interference waveguide feed network system provided by the embodiment of the present application. Figure 10 and Figure 11 The anti-interference waveguide feed network system includes a TX duplexer and an RX duplexer. Each duplexer includes a high-pass filter branch and a low-pass filter branch. The TX waveguide outlet of the TX duplexer and the RX inlet of the RX duplexer are coplanar and communicate with the feed source via a bulkhead phase shifter.

[0068] In this embodiment, the TX duplexer primarily transmits frequency band signals through its TX waveguide outlet (common port). The TX waveguide outlet of the TX duplexer is connected to a bulkhead phase shifter, while the TX inlet of the TX duplexer serves as the waveguide port through which the transmit signal enters. In this embodiment, leakage signals in the receive band can be input through the common port and enter the TX duplexer's absorbing load, which eliminates reflections of the receive signal.

[0069] In this embodiment, reference Figure 12-13 The TX duplexer includes a first high-pass filter branch and a first low-pass filter branch. The first end of the first high-pass filter branch is used to receive the TX input signal. The second end of the first high-pass filter branch is connected to the first end of the first low-pass filter branch. The second end of the first high-pass filter branch is used to pass the TX input signal to the TX waveguide outlet of the TX duplexer.

[0070] 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.

[0071] 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 transmit the TX input signal to the TX waveguide outlet of the TX duplexer.

[0072] The second end of the first waveguide unit is connected to the first end of the first E-plane curved waveguide, the second end of the first E-plane curved 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.

[0073] 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 filter branch includes six resonant cavities and an E-surface bent waveguide. The first high-pass filter branch can allow waves with a frequency of 27.5~31GHz to pass through. In this embodiment, the resonant cavity is a device for generating and maintaining electromagnetic oscillations, which is usually formed by enclosing a part of the waveguide. The shape of the resonant cavity can be a variety of regular shapes such as rectangular and cylindrical, and resonant cavities of different shapes have different electromagnetic properties. The size of the cavity is closely related to the operating wavelength. Generally speaking, the length, width and height of the cavity are designed according to the required resonant frequency, usually an integer multiple or half-integer multiple of the operating wavelength.

[0074] The working principle of the resonant cavity is:

[0075] When an electromagnetic wave propagates through a waveguide and enters a resonant cavity, it reflects back and forth within the cavity. Due to the reflection of the cavity wall on the electromagnetic wave, the electromagnetic wave forms a standing wave within the cavity.

[0076] When the cavity dimensions meet certain conditions, electromagnetic waves of a specific frequency will resonate within the cavity. This means that electromagnetic waves of that frequency can persist within the cavity and form a stable electromagnetic field distribution, while electromagnetic waves of other frequencies will quickly decay. This is because at the resonant frequency, the propagation of electromagnetic waves within the cavity meets a certain phase relationship, allowing 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 a wide range of frequencies, causing them to resonate within the cavity while suppressing electromagnetic waves of other frequencies, thereby achieving a frequency-selective effect.

[0077] In this embodiment, the first low-pass filtering branch includes a third waveguide unit, a fourth waveguide unit, a second E-plane bent waveguide and a third E-plane bent waveguide.

[0078] 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.

[0079] In this embodiment, the third waveguide unit includes three resonant cavities, and the fourth waveguide unit includes one resonant cavity. This means that the entire first low-pass filter branch comprises four resonant cavities and two E-surface curved waveguides. The fourth waveguide unit is terminated with a wedge-shaped absorber to absorb signals leaking from the RX duplexer and prevent signal reflection. In this embodiment, the resonant cavity frequency can be set below 27.5 GHz, thereby improving isolation and optimizing passband performance, ultimately achieving better matching, isolation, and suppression for the high-pass filter branch.

[0080] refer to Figures 14-18 The TX duplexer is constructed by splicing two symmetrical first and second structural members. A first welding rod and a second welding rod are welded to the outside of the splicing line between the first and second structural members. The first and second welding rods are disconnected at the TX waveguide outlet of the TX duplexer and disconnected at the TX input of the TX duplexer. The first and second structural members are also secured with multiple screws perpendicular to the splicing line.

[0081] In this embodiment, when installing the TX duplexer, first use screws to fasten it. Considering the small size requirement, the number of screws should not be too many. Then use two welding rods to weld the two parts together to prevent electric field leakage. Figure 19 After adding a duplexer to the transmitting waveguide port (TX waveguide outlet), the receiving signal leaked from the receiving port to the transmitting port can enter the RX frequency band absorbing load (first absorbing load) through the duplexer, eliminating the receiving signal reflection.

[0082] In one embodiment of the present disclosure, reference Figure 20-21 The RX duplexer includes a second high-pass filter branch and a second low-pass filter branch, wherein the first end of the second low-pass filter branch is used to receive the RX input signal, the first end of the second low-pass filter branch is further connected to the first end of the second high-pass filter branch, and the second end of the second low-pass filter branch is used to transmit the RX input signal to the RX waveguide outlet of the RX duplexer;

[0083] A second absorbing load for absorbing the transmission signal of the TX duplexer is provided at the second end of the second high-pass filter branch.

[0084] In this embodiment, the second low-pass filter branch includes n waveguide units connected in sequence. The second high-pass filter branch includes m waveguide units connected in sequence, and the output end of the m-th waveguide unit is provided with a second absorbing load. In this embodiment, n can be 7, m can be 3, and each waveguide unit has a resonant cavity. By setting the resonant frequency of the resonant cavity, this embodiment can make the resonant frequency of the resonant cavity of the second low-pass filter branch lower than 27.5GHz, and finally achieve low-pass characteristics. By setting the frequency of the resonant cavity, this embodiment can make the second high-pass filter branch produce stronger reflection and attenuation for the receiving frequency band, set the resonant cavity frequency to within the transmitting frequency band, and achieve better performance. At the same time, a wedge-shaped absorbing load is placed at the end of the second high-pass filter branch to achieve anti-reflection characteristics.

[0085] In this embodiment, reference Figure 22-26 ,The RX duplexer is composed of two symmetrical third structural members and a fourth structural member;

[0086] 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;

[0087] The third structural member and the fourth structural member are further fixed by a plurality of screws in a direction perpendicular to the splicing line.

[0088] The installation process of the RX duplexer in this embodiment is the same as that of the TX duplexer. First, use screws to tighten. Considering the small size requirement, 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. Figure 27 After adding a duplexer at the receiving waveguide port (RX waveguide port), the transmit signal leaked from the transmit port to the receiving waveguide port can enter the TX band absorbing load (second absorbing load) through the duplexer, eliminating the transmit signal reflection.

[0089] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

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

2. The anti-interference waveguide feed network system 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 bend waveguide, the second end of the first E-plane bend 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 system according to claim 1, characterized in that: The first low-pass filtering 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 system 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 system according to claim 1, characterized in that: The second high-pass filtering branch includes m waveguide units connected in sequence, wherein the output end of the m-th waveguide unit is provided with a second absorbing load.

6. The anti-interference waveguide feed network system 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 on the same plane, and both communicate with the feed source through the partition phase shifter.

7. The anti-interference waveguide feed network system 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 a 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 further fixed by a plurality of screws in a direction perpendicular to the splicing line.

8. The anti-interference waveguide feed network system 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 further fixed by a plurality of screws in a direction perpendicular to the splicing line.

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

Images