A high-power dual-mode duplexer

Abstract

The present invention discloses a high-power dual-mode duplexer, belonging to the field of scatter communication technology. It includes a switching switch, a narrowband electrically tunable duplexer, a narrowband low-noise amplifier, a broadband fixed duplexer, a broadband low-noise amplifier, a broadband self-loop, a load, monitoring and power supply. The duplexer has a narrowband electrically tunable mode and a broadband fixed mode, and the two modes can be switched through a conversion switch. When the conversion switch is switched to the narrowband electrically tunable mode, the transmitted signal enters the transmission channel of the narrowband electrically tunable duplexer from the input port through the switching switch and is sent to the antenna through the switching switch. When the conversion switch is switched to the broadband fixed mode, the transmitted signal enters the transmission channel of the broadband duplexer from the input port through the switching switch and is sent to the antenna through the switching switch. The narrowband electrically tunable mode of the present invention has a narrow operating bandwidth and can effectively suppress out-of-band interference. In the broadband fixed mode, the broadband duplexer is a waveguide resonator structure, with low insertion loss in the passband and high power handling capacity. The two operating modes can be flexibly switched, making it applicable to various communication forms.

Description

Technical Field

[0001] The present invention relates to a high-power dual-mode duplexer in the field of scatter communication technology, which has a narrow-band electrically tunable operating mode and a wide-band fixed operating mode, and is particularly suitable for various communication modes in a C-band communication system. Background Art

[0002] At present, in scatter communication systems, two types of duplexers are widely used. One is a frequency-tunable duplexer, which uses narrow-band filtering, has a narrow passband, a tunable operating frequency, can flexibly configure the operating frequency, effectively suppresses interference signals, improves the electromagnetic compatibility performance and spectrum utilization rate of the communication system, and also greatly improves the reliability of the communication system. At the same time, the frequency-tunable duplexer has good stopband suppression performance, is convenient for networking applications, and improves the spectrum utilization rate. However, the frequency-tunable duplexer has certain disadvantages that are difficult to overcome. Its available frequency band is relatively narrow, it is difficult to ensure the passband consistency, and the loss within the passband is slightly large. The other is a fixed-frequency duplexer, which has a low cost, is convenient for miniaturization, easy to integrate, and has excellent electrical performance. However, the fixed-frequency duplexer generally uses a wide-passband filter and is powerless against interference signals within the passband. In the face of the current complex communication environment, a device that combines the advantages of the above two types of duplexers and avoids their disadvantages is urgently needed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a duplex device that operates in the C-band, can withstand high power, is suitable for various communication environments, and has an in-machine detection and fault location function.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is:

[0005] A high-power dual-mode duplexer includes a switch one (1), a first load (2), a narrow-band electrically tunable duplexer (3), a switch two (4), a wide-band fixed duplexer (5), a second load (6), a switch three (7), a wide-band low-noise amplifier (8), a narrow-band low-noise amplifier (9), and a monitoring and power supply (10);

[0006] The first input end of the switch one is used to receive a radio frequency signal. The second input end of the switch one is connected to the first output end of the monitoring and power supply. The first output end of the switch one is connected to the first input end of the narrow-band electrically tunable duplexer (3). The second output end of the switch one is connected to the first input end of the wide-band fixed duplexer (5). The third output end of the switch one is connected to the input end of the first load (2);

[0007] The second input end of the narrow-band electrically tunable duplexer is connected to the second output end of the monitoring and power supply; the first output end of the narrow-band electrically tunable duplexer is connected to the first input end of the narrow-band low-noise amplifier; the first bi-directional end of the narrow-band electrically tunable duplexer is connected to the bi-directional port of the switch two;

[0008] The second bidirectional port of the second changeover switch is connected to the antenna; the third bidirectional port of the second changeover switch is connected to the first bidirectional port of the broadband fixed duplexer; the first output terminal of the second changeover switch is connected to the second load (6); the first input terminal of the second changeover switch is connected to the third output terminal of the monitoring and power supply;

[0009] The first output terminal of the broadband fixed duplexer is connected to the first input terminal of the broadband low-noise amplifier;

[0010] The first input terminal of the third changeover switch is connected to the sixth output terminal of the monitoring and power supply; the second input terminal of the third changeover switch is connected to the first output terminal of the narrowband low-noise amplifier; the first output terminal of the third changeover switch is for radio frequency signal output; the third input terminal of the third changeover switch is connected to the first output terminal of the broadband low-noise amplifier;

[0011] The second input terminal of the broadband low-noise amplifier is connected to the fourth output terminal of the monitoring and power supply; the second input terminal of the narrowband low-noise amplifier is connected to the fifth output terminal of the monitoring and power supply.

[0012] Furthermore, there are two operating modes, namely the narrowband electrically tunable mode and the broadband fixed mode; the current operating mode is viewed through the monitoring display in the monitoring and power supply, and the switching between the two operating modes is achieved by issuing commands to the first changeover switch (1), the second changeover switch (4), and the third changeover switch (7);

[0013] The narrowband electrically tunable operating mode is as follows: Commands are issued to the first changeover switch (1), the second changeover switch (4), and the third changeover switch (7) through the monitoring and power supply (10) to switch the three switches to the narrowband electrically tunable mode; the signal transmission and reception process is: The transmitted signal enters the transmitting channel of the narrowband electrically tunable duplexer (3) from the input port through the first changeover switch (1), and is sent to the antenna through the second changeover switch (4); the received signal enters the receiving channel of the narrowband electrically tunable duplexer (3) from the antenna port through the second changeover switch (4), and after being amplified by the narrowband low-noise amplifier (9), is output through the third changeover switch (7);

[0014] The broadband fixed operating mode is as follows: Commands are issued to the first changeover switch (1), the second changeover switch (4), and the third changeover switch (7) through the monitoring and power supply to switch the three switches to the broadband fixed mode; the signal transmission and reception process is: The transmitted signal enters the transmitting channel of the broadband fixed duplexer (5) from the input port through the first changeover switch (1), and is sent to the antenna through the second changeover switch (4); the received signal enters the receiving channel of the broadband fixed duplexer (5) from the antenna port through the second changeover switch (4), and after being amplified by the broadband low-noise amplifier (8), is output through the third changeover switch (7).

[0015] Further, the narrowband electrically tunable duplexer is composed of a narrowband electrically tunable transmit filter (201), a circulator (202), a frequency calibration unit (203), a narrowband self-loop (204), and a narrowband electrically tunable receive filter (205). The narrowband electrically tunable mode is continuously adjustable within its entire frequency band;

[0016] The first bi-directional port of the narrowband electrically tunable transmit filter is connected to the first bi-directional port of the frequency calibration unit (203); the first output port of the narrowband electrically tunable transmit filter is connected to the first input end of the narrowband self-loop (204); the second output port of the narrowband electrically tunable transmit filter is connected to the first input end of the circulator (202); the second bi-directional port of the frequency calibration unit (203) is connected to the first bi-directional port of the narrowband electrically tunable receive filter (205); the first output end of the narrowband self-loop is connected to the first input end of the narrowband electrically tunable receive filter (205); the second output end of the circulator is connected to the second input end of the narrowband electrically tunable receive filter (205);

[0017] The input port of the narrowband electrically tunable transmit filter (201) is connected to the first switch; the output port of the narrowband electrically tunable receive filter (205) is connected to a narrowband low-noise amplifier; the first output port of the circulator is connected to the second switch.

[0018] Further, the narrowband electrically tunable transmit filter (201), the circulator (202), and the narrowband electrically tunable receive filter (205) in the RF channels of the narrowband electrically tunable duplexer (3) are all in the form of waveguide structures.

[0019] Further, the narrowband electrically tunable duplexer (3) is designed with a self-loop detection circuit, which can cooperate with the monitoring and power supply (10) to monitor the device status in real time and can also perform fault location.

[0020] Further, before frequency tuning, the narrowband electrically tunable duplexer (3) needs to receive switching instructions from the monitoring and power supply and send them to the first switch (1) and the second switch (4) to connect the narrowband electrically tunable duplexer to the load end. The receive and transmit channels of the narrowband electrically tunable duplexer complete frequency tuning simultaneously; after the frequency tuning is completed, the monitoring and power supply (10) sends switching instructions to the first switch (1) and the second switch (4) to switch the narrowband electrically tunable duplexer into the RF channel; the first switch (1) and the second switch (4) in the transmit channel are both in the form of dual-channel waveguide structures, can accept monitoring instructions for switching, and feedback the in-place detection after switching to the monitoring and power supply.

[0021] Further, the broadband fixed duplexer (5) is composed of a switching switch (301), a duplexer (302), a coupler (303), and a broadband self-loop module (304); the first bi-directional port of the switching switch (301) is connected to the first bi-directional port of the duplexer; the second bi-directional port of the switching switch (301) is connected to the second bi-directional port of the duplexer; the third bi-directional port of the duplexer is connected to the first bi-directional port of the coupler; the second bi-directional port of the coupler is connected to the bi-directional port of the broadband self-loop; the second bi-directional port of the coupler is connected to the second switching switch; the first input end of the switching switch (301) is connected to the second output end of the first switching switch (1); the output end of the switching switch (301) is connected to the broadband low-noise amplifier.

[0022] Further, the switching switch (301), the duplexer (302), and the coupler (303) of the radio frequency channel of the broadband fixed duplexer (5) are all in waveguide structures; the switching switch (301) can accept monitoring instructions for switching and feedback the in-place detection to the monitor; the duplexer (302) is formed by combining two filters with nine cavities at the low end and eight cavities at the high end.

[0023] Due to the adoption of the above technical solutions for the duplexer, the technological innovation achieved by the present invention lies in:

[0024] 1. The present invention operates in the C band, and a narrow-band electrically tunable mode and a broadband fixed mode are designed in one chassis with a high isolation switch, which is suitable for complex and changeable communication environments.

[0025] 2. The present invention designs a frequency calibration channel for the narrow-band electrically tunable duplexer. Before frequency calibration, the switching switches at both ends of the narrow-band electrically tunable duplexer are switched to the load end to cut off the connection with the power amplifier and the antenna, ensuring that there is no interference signal in the radio frequency channel of the electrically tunable duplexer and avoiding interference with the frequency calibration small signal, meeting the requirements of the communication equipment for fast and accurate full-band frequency modulation of the narrow-band electrically tunable duplexer. Description of the Drawings

[0026] Figure 1 is a schematic diagram of the composition of the present invention;

[0027] Figure 2 is a schematic diagram of the narrow-band electrically tunable duplexer of the present invention;

[0028] Figure 3 is a schematic diagram of the broadband fixed duplexer of the present invention. Detailed Embodiments

[0029] The present invention will be further described in detail below with reference to the drawings:

[0030] A high-power dual-mode duplexer, comprising a first switching switch 1, a load 2, a narrowband electrically tunable duplexer 3, a second switching switch 4, a broadband fixed duplexer 5, a load 6, a third switching switch 7, a broadband low-noise amplifier 8, a narrowband low-noise amplifier 9, a monitoring and power supply 10. The present invention has two operating modes: a narrowband electrically tunable mode and a broadband fixed mode.

[0031] Furthermore, the duplexer has two operating modes, namely a narrowband electrically tunable mode and a broadband fixed mode. The current operating mode can be viewed through a monitoring display. By operating a keyboard, the monitoring sends commands to the first switching switch 1, the second switching switch 4, and the third switching switch 7 to achieve the switching between the two operating modes.

[0032] Furthermore, the narrowband electrically tunable duplexer is composed of a narrowband electrically tunable transmitting filter 201, a circulator 202, a frequency calibration unit 203, a narrowband self-loop 204, and a narrowband electrically tunable receiving filter 205. The narrowband electrically tunable mode is continuously adjustable within its entire frequency band.

[0033] Furthermore, in the narrowband electrically tunable operating mode, by sending commands to the first switching switch 1, the second switching switch 4, and the third switching switch 7 through monitoring, the three switches are switched to the narrowband electrically tunable mode, enabling the present invention to operate in the narrowband electrically tunable mode. The signal transmission and reception processes are as follows: The transmitted signal enters the transmitting channel of the narrowband electrically tunable duplexer 3 from the input port through the first switching switch 1 and is sent to the antenna through the second switching switch 4; the received signal enters the receiving channel of the narrowband electrically tunable duplexer 3 from the antenna port through the second switching switch 4, and after being amplified by the narrowband low-noise amplifier 9, the signal is output through the third switching switch 7.

[0034] Furthermore, the narrowband electrically tunable transmitting filter 201, the circulator 202, and the narrowband electrically tunable receiving filter 205 in the RF channel of the narrowband duplexer are all in the form of waveguide structures.

[0035] Furthermore, the narrowband electrically tunable duplexer is designed with a self-loop detection circuit, which can cooperate with the monitoring and power supply 10 to detect or monitor the device status in real time and locate faults.

[0036] Furthermore, before frequency tuning of the narrowband electrically tunable duplexer 3, the monitoring needs to send a switching command to the first switching switch 1 and the second switching switch 4 to connect the narrowband electrically tunable duplexer to the load end, and the receiving and transmitting channels of the narrowband electrically tunable duplexer complete frequency tuning simultaneously. After the frequency tuning is completed, the monitoring sends a switching command to the first switching switch 1 and the second switching switch 4 to switch the narrowband electrically tunable duplexer into the narrowband electrically tunable operating mode.

[0037] Furthermore, the first switching switch 1 and the second switching switch 4 in the transmitting channel are both in the form of dual-channel waveguide structures, which can accept monitoring commands for switching and feedback the in-place detection after switching to the monitoring.

[0038] Further, in the broadband fixed working mode, instructions are sent to switch 1, switch 4, and switch 7 through monitoring to make all three switches switch to the broadband fixed mode. The signal transmission and reception processes are as follows: The transmitted signal enters the transmission channel of the broadband fixed duplexer 5 from the input port through switch 1 and is sent to the antenna through switch 4. The received signal enters the reception channel of the broadband fixed duplexer 5 from the antenna port through switch 4, and after being amplified by the broadband low-noise amplifier 8, it is output through switch 7.

[0039] Further, the broadband fixed duplexer 5 is composed of a switch 301, a duplexer 302, a coupler 303, and a broadband self-loop module 304.

[0040] Further, the switch 301, the duplexer 302, and the coupler 303 in the RF channel of the broadband fixed duplexer 5 are all waveguide structures. The switch 301 can accept monitoring instructions for switching and feedback the in-place detection to the monitoring. The duplexer 302 is formed by combining two filters with nine cavities at the low end and eight cavities at the high end.

[0041] Figure 1 It is a schematic diagram of the composition of the present invention. It includes switch 1, load 2, narrowband electrically tunable duplexer 3, switch 4, broadband fixed duplexer 5, load 6, switch 7, broadband low-noise amplifier 8, narrowband low-noise amplifier 9, monitoring, and power supply 10. The present invention has two working modes: narrowband electrical tuning mode and broadband fixed mode.

[0042] Switching between the two working modes: First, the current working mode can be viewed through the monitoring display. If it is the mode to be used, no operation is required. If not, a switching instruction needs to be given through the operation keyboard, and instructions are sent to switch 1, switch 4, and switch 7 through monitoring to achieve the switching between the two working modes.

[0043] In the narrowband electrical tuning mode of the invention, the narrowband electrically tunable duplexer 3 is designed in the communication channel, and the broadband fixed duplexer 5 is designed in the communication channel of the broadband fixed mode. The transmission channels are combined through switch 1 and switch 4, and the reception channels are combined through switch 4 and switch 7. Among them, switch 1 and switch 4 are in the transmission channel and are designed in the form of a double-pole double-throw waveguide structure; switch 1 is connected to load 2, and switch 4 is connected to load 6; the narrowband low-noise amplifier 9 is designed in the reception channel of the narrowband electrical tuning mode; the broadband low-noise amplifier 8 is designed in the reception channel of the broadband fixed mode. Switch 7 is located after the low-noise amplifier and only passes small-power signals, and is designed in the form of a single-pole double-throw coaxial structure.

[0044] Signal flow in the narrowband electrical tuning working mode:

[0045] The transmitted signal enters the transmitting channel of the narrowband electrically tunable duplexer 3 from the input port via the first switch 1 and is sent to the antenna via the second switch 4; the received signal enters the receiving channel of the narrowband electrically tunable duplexer 3 from the antenna port via the second switch 4, and after being amplified by the narrowband low-noise amplifier 9, it is output via the third switch 7.

[0046] Signal flow in the broadband fixed operating mode:

[0047] The transmitted signal enters the transmitting channel of the broadband fixed duplexer 5 from the input port via the first switch 1 and is sent to the antenna via the second switch 4; the received signal enters the receiving channel of the broadband fixed duplexer 5 from the antenna port via the second switch 4, and after being amplified by the broadband low-noise amplifier 8, it is output via the switch.

[0048] Figure 2 It is a schematic diagram of the narrowband electrically tunable duplexer of the present invention. The narrowband electrically tunable duplexer is composed of a narrowband electrically tunable transmitting filter 201, a circulator 202, a frequency calibration unit 203, a narrowband self-loop 204, and a narrowband electrically tunable receiving filter 205. The narrowband electrically tunable duplexer 3 can be tuned across the entire frequency band, is designed with a frequency calibration loop, and can tune the frequency according to commands; the narrowband electrically tunable duplexer is designed with a self-loop detection circuit, which can detect or monitor the device status and fault location in real time in cooperation with the monitor and power supply 10.

[0049] In the narrowband electrically tunable mode, its operating frequency band is tunable across the entire frequency band, and its frequency calibration process is as follows:

[0050] The monitor and power supply 10 send switching commands to the first switch 1 and the second switch 4 respectively. The two ends of the narrowband electrically tunable duplexer are switched to the load end. The monitor and power supply 10 send a preset frequency command to the narrowband electrically tunable duplexer 3, and automatically perform frequency tuning according to the received preset frequency command. After the frequency setting is completed, the monitor sends switching commands to the first switch 1 and the second switch 4 again to restore to the narrowband electrically tunable operating mode.

[0051] When the narrowband self-loop detection circuit performs self-checking, the monitor and power supply 10 send a switching command to the second switch 4. The antenna end of the narrowband self-loop channel is connected to a load, samples are taken from the narrowband electrically tunable transmitting filter 201 in the transmitting channel and sent to the narrowband self-loop 204. After being mixed and processed by the detection module of the narrowband self-loop 204, it becomes a received frequency signal and is sent into the receiving channel, and is output via the narrowband electrically tunable receiving filter 205 in the receiving channel. The narrowband self-loop 204, in cooperation with the monitor and power supply 10, can detect and query the device status and locate the fault location, meeting the requirements for the duplexer to have in-board detection and fault location functions.

[0052] The receiving and transmitting channel filters of the above-mentioned electrically tunable narrowband duplexer have the same structural form, both are five-cavity electrically tunable filters. The cavities are arranged linearly, using BJ48 waveguides, standard waveguide interfaces, and the sliding conductor is connected to the linear motor through the drive plate. The operating frequency is controlled by the monitoring unit and tuned by the frequency calibration unit to complete continuous tuning within the frequency range.

[0053] Figure 3 It is a schematic diagram of the broadband fixed duplexer of the present invention. The broadband fixed duplexer consists of a switching switch 301, a duplexer 302, a coupler 303, and a broadband self-loop module 304. The broadband fixed duplexer is designed with a self-loop detection circuit, which can detect or monitor the device status and fault location in cooperation with the monitoring and power supply 10.

[0054] The above-mentioned duplexer 302 has two working frequency bands, high and low, which can be used as receiving and transmitting channels for each other. The switching switch 301 is a double-pole double-throw waveguide switch. When the input end is switched to the high end, the low end is connected to the broadband low-noise amplifier 8. At this time, the broadband low-noise amplifier is in the high-transmission and low-reception working mode; when the input end is switched to the low end, the high end is connected to the broadband low-noise amplifier 8. At this time, the broadband low-noise amplifier is in the low-transmission and high-reception working mode; a switching instruction can be sent to the switching switch 301 through the monitoring keyboard.

[0055] The above-mentioned fixed duplexer has two channels, high and low. The high-end is an eight-cavity waveguide structure, and the low-end is a nine-cavity waveguide structure. It is output through the combiner end, and the matching switching switch 301 is a waveguide structure, which ensures that it can withstand high continuous wave power in the broadband fixed mode.

[0056] When the broadband self-loop detection circuit performs self-check, the monitoring and power supply 10 sends a switching instruction to the second switching switch 4. The antenna end of the broadband self-loop channel is connected to the load. The monitoring samples from the coupler 303 at the combiner end of the duplexer and sends it to the broadband self-loop module 304. After being mixed and processed by the detection module of the broadband self-loop module 304, it becomes a received frequency signal and is sent into the receiving channel and output through the receiving channel. The broadband self-loop module 304 cooperates with the monitoring and power supply 10 to detect and query the device status and locate the fault location, meeting the requirements of the communication device having the functions of in-machine detection and fault location.

[0057] The present invention is a 19-inch standard chassis. The whole design is divided into upper and lower layers. The upper layer is designed as the narrowband electrically tunable duplexer part, and the lower layer is the broadband fixed duplexer part. The lower layer is designed with guide rails. After removing the waveguide connection with the upper layer, the lower layer can be pulled out of the chassis; the front panel is equipped with monitoring, and the operating parameters of the device can be set through the operation keyboard, and the front panel can be opened to the side. The two sides of the chassis are designed with channel guide rails and are installed in the communication cabinet through the channel guide rails. The front panel is designed with captive screws, and the rear panel is designed with fastening screws to fix it on the communication cabinet.

Claims

1. A high-power dual-mode duplexer, characterized in that, It includes a first switching switch (1), a first load (2), a narrow-band electrically tunable duplexer (3), a second switching switch (4), a wide-band fixed duplexer (5), a second load (6), a third switching switch (7), a wide-band low-noise amplifier (8), a narrow-band low-noise amplifier (9), and a monitoring and power supply (10); The first input end of the first switching switch is used to receive radio frequency signals. The second input end of the first switching switch is connected to the first output end of the monitoring and power supply module. The first output end of the first switching switch is connected to the first input end of the narrow-band electrically tunable duplexer (3). The second output end of the first switching switch is connected to the first input end of the wide-band fixed duplexer (5). The third output end of the first switching switch is connected to the input end of the first load (2); The second input end of the narrow-band electrically tunable duplexer is connected to the second output end of the monitoring and power supply; the first output end of the narrow-band electrically tunable duplexer is connected to the first input end of the narrow-band low-noise amplifier; the first bi-directional end of the narrow-band electrically tunable duplexer is connected to the bi-directional port of the second switching switch; The second bi-directional port of the second switching switch is connected to the antenna; the third bi-directional port of the second switching switch is connected to the first bi-directional port of the wide-band fixed duplexer; the first output end of the second switching switch is connected to the second load (6); the first input end of the second switching switch is connected to the third output end of the monitoring and power supply; The first output end of the wide-band fixed duplexer is connected to the first input end of the wide-band low-noise amplifier; The first input end of the third switching switch is connected to the sixth output end of the monitoring and power supply; the second input end of the third switching switch is connected to the first output end of the narrow-band low-noise amplifier; the first output end of the third switching switch is used for radio frequency signal output; the third input end of the third switching switch is connected to the first output end of the wide-band low-noise amplifier; The second input end of the wide-band low-noise amplifier is connected to the fourth output end of the monitoring and power supply; the second input end of the narrow-band low-noise amplifier is connected to the fifth output end of the monitoring and power supply.

2. The high-power dual-mode duplexer according to claim 1, wherein There are two working modes, namely the narrow-band electrically tunable mode and the wide-band fixed mode; the current working mode can be viewed through the monitoring display in the monitoring and power supply, and the switching between the two working modes is achieved by sending commands to the first switching switch (1), the second switching switch (4), and the third switching switch (7); The specific process of the narrow-band electrically tunable working mode is as follows: Commands are sent to the first switching switch (1), the second switching switch (4), and the third switching switch (7) through the monitoring and power supply (10) to switch the three switches to the narrow-band electrically tunable mode; The signal transmission and reception process is as follows: The transmitted signal enters the transmitting channel of the narrow-band electrically tunable duplexer (3) from the input port through the first switching switch (1), and is sent to the antenna through the second switching switch (4); the received signal enters the receiving channel of the narrow-band electrically tunable duplexer (3) from the antenna port through the second switching switch (4), and then is output through the third switching switch (7) after the signal is amplified by the narrow-band low-noise amplifier (9); The specific broadband fixed working mode is as follows: Commands are sent to switch 1 (1), switch 2 (4), and switch 3 (7) through monitoring and power supply, causing all three switches to switch to the broadband fixed mode; The signal transmission and reception process is as follows: The transmitted signal enters the transmitting channel of the broadband fixed duplexer (5) from the input port through switch 1 (1) and is sent to the antenna through switch 2 (4); The received signal enters the receiving channel of the broadband fixed duplexer (5) from the antenna port through switch 2 (4), and after being amplified by the broadband low-noise amplifier (8), it is output through switch 3 (7).

3. The high-power dual-mode duplexer according to claim 2, characterized in that The narrowband electrically tunable duplexer consists of a narrowband electrically tunable transmitting filter (201), a circulator (202), a frequency calibration unit (203), a narrowband self-loop (204), and a narrowband electrically tunable receiving filter (205), and the narrowband electrically tunable mode is continuously adjustable within its entire frequency band; The first bi-directional port of the narrowband electrically tunable transmitting filter is connected to the first bi-directional port of the frequency calibration unit (203); The first output port of the narrowband electrically tunable transmitting filter is connected to the first input end of the narrowband self-loop (204); The second output port of the narrowband electrically tunable transmitting filter is connected to the first input end of the circulator (202); The second bi-directional port of the frequency calibration unit (203) is connected to the first bi-directional port of the narrowband electrically tunable receiving filter (205); The first output end of the narrowband self-loop is connected to the first input end of the narrowband electrically tunable receiving filter (205); The second output end of the circulator is connected to the second input end of the narrowband electrically tunable receiving filter (205); The input port of the narrowband electrically tunable transmitting filter (201) is connected to switch 1; The output port of the narrowband electrically tunable receiving filter (205) is connected to the narrowband low-noise amplifier; The first output port of the circulator is connected to switch 2.

4. A high-power dual-mode duplexer according to claim 3, characterized in that, The narrowband electrically tunable transmitting filter (201), the circulator (202), and the narrowband electrically tunable receiving filter (205) in the RF channel of the narrowband electrically tunable duplexer (3) are all in the form of waveguide structures.

5. The high-power dual-mode duplexer according to claim 3, wherein The narrowband electrically tunable duplexer (3) is designed with a self-loop detection circuit, which can cooperate with the monitoring and power supply (10) to monitor the device status in real time and can also perform fault location.

6. The high-power dual-mode duplexer according to claim 3, wherein Before frequency tuning, the narrowband electrically tunable duplexer (3) needs to receive a switching command from the monitoring and power supply to switches 1 (1) and 2 (4) to connect the narrowband electrically tunable duplexer to the load end, and the receiving and transmitting channels of the narrowband electrically tunable duplexer complete frequency tuning simultaneously; After frequency tuning is completed, the monitoring and power supply (10) sends a switching command to switches 1 (1) and 2 (4) to switch the narrowband electrically tunable duplexer into the RF channel; The switches 1 (1) and 2 (4) in the transmitting channel are both in the form of dual-channel waveguide structures, can accept monitoring commands for switching, and feedback the in-place detection after switching to the monitoring and power supply.

7. The high-power dual-mode duplexer according to claim 2, wherein The broadband fixed duplexer (5) is composed of a switching switch (301), a duplexer (302), a coupler (303) and a broadband self-loop module (304); the first bi-directional port of the switching switch (301) is connected to the first bi-directional port of the duplexer; the second bi-directional port of the switching switch (301) is connected to the second bi-directional port of the duplexer; the third bi-directional port of the duplexer is connected to the first bi-directional port of the coupler; the second bi-directional port of the coupler is connected to the bi-directional port of the broadband self-loop; the second bi-directional port of the coupler is connected to the second switching switch; the first input end of the switching switch (301) is connected to the second output end of the first switching switch (1); the output end of the switching switch (301) is connected to the broadband low-noise amplifier.

8. The high-power dual-mode duplexer according to claim 7, wherein, The switching switch (301), the duplexer (302) and the coupler (303) of the radio frequency channel of the broadband fixed duplexer (5) are all waveguide structures; the switching switch (301) can accept monitoring instructions for switching and feedback the in-place detection to the monitoring; the duplexer (302) is formed by combining two filters with nine cavities at the low end and eight cavities at the high end.

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