Ka-band 2000W continuous wave power amplifier

Abstract

The invention discloses a Ka-band 2000W continuous wave power amplifier, which comprises a driving control module, a power divider, an eight-path power amplifier module, a power combiner and a monitoring module, the driving control module is used for performing driving amplification and level adjustment on the input low-power signal and outputting a primary power signal; the power divider is used for dividing the primary power signal into eight paths of equal-amplitude primary power signals; each path of power amplifier module is used for performing power amplification on the single-path constant-amplitude primary power signal to obtain a single-path intermediate power signal; the power combiner is used for combining the eight single-path intermediate power signals into one path and outputting a final-stage power signal; the monitoring module is used for monitoring and protecting a primary power signal, eight paths of intermediate power signals and a final power signal; each power amplifier module comprises an amplitude-phase adjusting circuit, a traveling wave tube amplifier and a control and protection circuit. According to the invention, the low-loss and high-power transmission capability of Ka-band 2000W continuous waves is realized through distribution and synthesis of eight paths of power signals.

Description

Technical Field

[0001] The invention belongs to the field of deep space exploration satellite communications, and in particular relates to a Ka-band 2000W continuous wave power amplifier. Background Art

[0002] At present, there are few kilowatt-class power amplifiers that can be applied to the Ka-band in the field of deep space exploration at home and abroad. With the development of measurement and control technology and the further increase in demand, the demand is becoming more and more urgent. In order to meet the development needs of the Ka-band for future deep space exploration, improve the ground uplink transmission capability of future deep space exploration, overcome a series of key technologies of Ka-band high-power amplifiers, improve the maturity of technology, accumulate experience for future engineering applications, and lay a technical foundation, it is necessary to carry out high-power, large-bandwidth high-power amplifier technology research.

[0003] The Chinese utility model patent with announcement number CN205829581U discloses a Ka-band 400W continuous wave solid-state high-power amplifier, including a drive and monitoring module, a splitter module, a final power amplifier module, a synthesizer module and a microwave component module; the solid-state high-power amplifier adopts a non-binary method to design the waveguide splitting and synthesis network, so that the solid-state high-power amplifier reaches the hundred-watt level. However, the hundred-watt Ka-band transmitter can no longer meet the needs of future detection. Therefore, technicians urgently need to break through the ground-based Ka-band kilowatt-level continuous wave high-power amplifier technology to enhance my country's deep space tracking and control Ka-band capabilities. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, achieve kilowatt-level continuous wave power output in the Ka band, and provide a Ka-band 2000W continuous wave power amplifier.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: A Ka-band 2000W continuous wave power amplifier, comprising a drive control module, a power divider, an eight-way power amplifier module, a power synthesizer and a monitoring module; The drive control module is used to drive and amplify the input low-power signal and adjust the level, and output the primary power signal; The power divider is used for dividing the primary power signal into eight equal-amplitude primary power signals; Each power amplifier module is used to amplify the power of a single-channel equal-amplitude primary power signal to obtain a single-channel intermediate power signal; The power combiner is used to combine eight single-channel intermediate power signals into one channel and output a final power signal; The monitoring module is connected to the drive control module and each power amplifier module respectively, and the monitoring module is used to monitor and protect the primary power signal, the eight intermediate power signals and the final power signal; Each power amplifier module includes an amplitude and phase adjustment circuit and a traveling wave tube amplifier. The output end of the amplitude and phase adjustment circuit is connected to the signal input end of the traveling wave tube amplifier. The amplitude and phase adjustment circuit is used to perform amplitude adjustment and phase adjustment on the input single-channel equal-amplitude primary power signal, and output the signal after amplitude and phase adjustment. The single-channel intermediate power signal traveling wave tube amplifier is used to excite and amplify the signal after amplitude and phase adjustment and then output a single-channel intermediate power signal.

[0006] The present invention realizes Ka-band continuous wave high power amplifier, drives and amplifies input signals and controls their levels through a driving control unit; adopts a power amplifier module with a traveling wave tube to expand the output power of each power amplifier module, so that each power amplifier module can output high-power continuous waves; and adopts an eight-way power amplifier module to reduce the synthesis network, reduce the difficulty of debugging and reduce the overall size of the amplifier; and monitors and controls the power amplifier module and the driving control module through a monitoring module.

[0007] Preferably, it also includes a first power coupler, the input end of the first power coupler is connected to the output end of the power synthesizer, the first output end of the first power coupler is used to output the final stage power main signal, the second output end of the first power coupler is connected to the first detector, the output end of the first detector is connected to the monitoring module, the first power coupler is used to couple the final stage power signal and output the final stage power coupled signal for detection, the first detector is used to detect the final stage power coupled signal and output a first detection signal, and the monitoring module is used to monitor and protect the first detection signal.

[0008] Preferably, the drive control module includes a first isolator, a linearizer, a first amplifier, a voltage-controlled attenuator, a second amplifier, a radio frequency switch and a second isolator connected in sequence; the input end of the first isolator is used to receive a low-power signal, and the output end of the second isolator is used to output a primary power signal.

[0009] Preferably, the drive control module also includes a second power coupler, the input end of the second power coupler is connected to the output end of the first isolator, the first output end of the second power coupler is connected to the second detector, the output end of the second detector is connected to the monitoring module, the second output end of the second power coupler is used to connect to an external load, the second power coupler is used to couple out a low-power signal isolated by the first isolator, the second detector is used to detect the signal coupled out by the second power coupler and then output a second detection signal, and the monitoring module is used to monitor and protect the second detection signal.

[0010] Preferably, each power amplifier module also includes a third power coupler and a third detector, the input end of the third power coupler is connected to the signal output end of the traveling wave tube amplifier, the first output end of the third power coupler is used to output a single-channel intermediate power signal, the second output end of the third power coupler is connected to the third detector, the output end of the third detector is connected to the monitoring module, and the third power coupler is used to couple out a single-channel intermediate power signal; the third detector is used to output a third detection signal after detecting the coupled single-channel intermediate power signal, and the monitoring module is used to monitor and protect the third detection signal.

[0011] Preferably, the monitoring module includes a monitoring mainboard and an interface component, the monitoring mainboard includes a CPU, the CPU is connected to an IO interface circuit, an AD sampling circuit, a network module or a 485 transmission module, the 485 transmission module is connected to each power amplifier module, the AD sampling circuit is used to connect to the output end of the first detector, the output end of the second detector or the output end of the third detector, the IO interface circuit is used to connect to a linearizer, a radio frequency switch or a voltage-controlled attenuator, and the network module is used to connect to a remote control device.

[0012] The input level, output power and reflected power are collected, converted, sampled and processed through the AD sampling circuit. The voltage-controlled attenuation and RF suppression or permission function are controlled through the IO interface circuit. The output power of the drive control module can be adjusted in a small range. The remote control device is connected through the network module to receive the power setting command and adjust the output power of the voltage-controlled attenuator.

[0013] Preferably, a control and protection circuit is arranged inside each power amplifier module, the monitoring mainboard is connected to the control and protection circuit, the control and protection circuit includes a temperature protection circuit and a reflection protection circuit, the input end of the reflection protection circuit is connected to the output end of the third detector, and the output end of the reflection protection circuit and the output end of the temperature protection circuit are both connected to the input end of the monitoring module.

[0014] Preferably, a heat dissipation module is further included, the heat dissipation module includes a main heat sink and an auxiliary heat sink which are symmetrically arranged, the main heat sink includes a main cold plate and main heat dissipation fins, the main cold plate is arranged at the outer end of the main heat dissipation fins, the auxiliary heat sink includes an auxiliary cold plate and auxiliary heat dissipation fins, the auxiliary cold plate is arranged at the outer end of the auxiliary heat dissipation fins, and a pressure isolation fin is arranged between the inner end of the main heat dissipation fin and the inner end of the auxiliary heat dissipation fin; The main cold plate is provided with a heat conduction pipe group for conducting heat from the inside of the main cold plate to the outside, and a plurality of cooling fans are arranged side by side at one of the heat conduction ends of the main cold plate. The heat conduction pipe group includes a main heat conduction pipe group and a sub heat conduction pipe group with opposite heat conduction directions, and the main heat conduction pipe group and the sub heat conduction pipe group both include a plurality of heat conduction pipes arranged side by side.

[0015] Preferably, it also includes a power supply module for providing working voltage, the power supply module includes a high-voltage power supply, and the high-voltage power supply is connected to the traveling wave tube amplifier and the monitoring module. The high-voltage power supply provides a suitable working voltage for each electrode of the traveling wave tube amplifier to ensure the normal operation of the traveling wave tube amplifier; the heat dissipation device dissipates the heat of the device in time to ensure that the device works within a reasonable temperature range.

[0016] Preferably, the power combiner adopts a Ka-band kilowatt-class continuous wave broadband eight-way power combiner with a waveguide H-plane coupling bridge, and the structure of the power divider is symmetrical to the power combiner. The power divider includes a cavity, an input waveguide interface arranged on the front side of the cavity, and eight output waveguide interfaces arranged on the rear side of the cavity.

[0017] The present invention realizes the power synthesis of eight-way traveling wave tubes in the 4GHz bandwidth of the Ka band, adopts a traveling wave tube amplifier, and an eight-way branching and synthesis form, and realizes a low-loss, 2000W continuous wave high power transmission capability. The eight-way traveling wave tube is used for power amplification, and the synthesis after multi-way power amplification based on vacuum electron tubes is realized, thereby improving the power capacity of the power amplifier. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a schematic diagram of the principle of the present invention; Figure 2 is a schematic diagram of the principle of the drive control module of the present invention; Figure 3 It is a schematic diagram of the principle of each power amplifier module of the present invention; Figure 4 It is a schematic diagram of the structure of the power combiner or power divider of the present invention; Figure 5 It is a schematic diagram of the principle of the monitoring module of the present invention; Figure 6 It is a schematic diagram of the internal structure of the present invention; Figure 7 It is a schematic diagram of the internal right side structure of the present invention; Figure 8 It is a schematic diagram of the internal left side structure of the present invention Fig. 9 It is a schematic diagram of the internal rear structure of the present invention; Fig.10 It is a schematic diagram of the chassis structure of the present invention; Fig.11 is a temperature simulation diagram of the main radiator of the present invention; Fig.12 It is the internal physical diagram of the present invention.

[0019] Explanation of reference numerals: 1: drive control module; 2: power distributor; 3: power amplifier module; 4: power synthesizer; 5: first power coupler; 6: monitoring module; 701: main radiator; 702: auxiliary radiator; 703: cooling fan; 8: high voltage power supply; 9: box; 10: cooling hole. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, a Ka-band 2000W continuous wave power amplifier provided by the present invention includes a drive control module, a power divider, an eight-way power amplifier module, a power synthesizer, a monitoring module, a first power coupler, a power supply module and a heat dissipation module.

[0021] The driving control module is used to drive, amplify and level-adjust the input low-power signal and output the primary power signal; the power distributor is used to divide the primary power signal into eight equal-amplitude primary power signals; each power amplifier module is used to power-amplify the single-channel equal-amplitude primary power signal to obtain a single-channel intermediate power signal; the power synthesizer is used to synthesize the eight-channel single-channel intermediate power signals into one channel and output the final power signal; the monitoring module is respectively connected to the driving control module and each power amplifier module, and the monitoring module is used to monitor and protect the primary power signal, the eight-channel intermediate power signals and the final power signal. The input end of the first power coupler is connected to the output end of the power synthesizer, the first output end of the first power coupler is used to output the final power main signal, the second output end of the first power coupler is connected to the first detector, the output end of the first detector is connected to the monitoring module, the first power coupler is used to couple the final power signal, output the final power coupling signal for detection, the first detector is used to detect the final power coupling signal and output the first detection signal, and the monitoring module is used to monitor and protect the first detection signal.

[0022] In this embodiment, Figure 2As shown, the drive control module includes a first isolator T1, a linearizer L1, a first amplifier A1, a voltage-controlled attenuator U1, a second amplifier A2, a radio frequency switch K1, and a second isolator T2 connected in sequence; the input end of the first isolator T1 is used to receive a low-power signal, and the output end of the second isolator T2 is used to output a primary power signal. The drive control module also includes a second power coupler G1, the input end of the second power coupler G1 is connected to the output end of the first isolator T1, the first output end of the second power coupler G1 is connected to the second detector D2, the output end of the second detector D2 is connected to the monitoring module, the second output end of the second power coupler G1 is used to connect to an external load, the second power coupler G1 is used to couple out a low-power signal isolated by the first isolator T1, the second detector D2 is used to detect the signal coupled out by the second power coupler G1 and then output a second detection signal, and the monitoring module is used to monitor and protect the second detection signal.

[0023] In this embodiment, Figure 3 As shown, each power amplifier module includes an amplitude and phase adjustment circuit, a traveling wave tube amplifier, a third power coupler and a third detector. The output end of the amplitude and phase adjustment circuit is connected to the signal input end of the traveling wave tube amplifier. The amplitude and phase adjustment circuit is used to adjust the amplitude and phase of the input single-channel equal-amplitude primary power signal, and output the signal after amplitude and phase adjustment; the traveling wave tube amplifier is used to excite and amplify the signal after amplitude and phase adjustment and output a single-channel intermediate power signal; the input end of the third power coupler is connected to the signal output end of the traveling wave tube amplifier, the first output end of the third power coupler is used to output a single-channel intermediate power signal, the second output end of the third power coupler is connected to the third detector, the output end of the third detector is connected to the monitoring module, and the third power coupler is used to couple out a single-channel intermediate power signal; the third detector is used to detect the coupled single-channel intermediate power signal and output a third detection signal, and the monitoring module is used to monitor and protect the third detection signal.

[0024] In this embodiment, each power amplifier module can achieve a continuous wave power output of about 350W. By using a traveling wave tube with a single tube output power of large power, the output power of each power amplifier module is increased, the synthesis network is shortened, the difficulty of amplifier debugging is reduced, and the overall size of the amplifier is reduced.

[0025] A control and protection circuit is also provided inside each power amplifier module. The monitoring mainboard is connected to the control and protection circuit. The control and protection circuit includes a temperature protection circuit and a reflection protection circuit. The input end of the reflection protection circuit is connected to the output end of the third detector, and the output end of the reflection protection circuit and the output end of the temperature protection circuit are both connected to the input end of the monitoring module.

[0026] The control circuit is used to provide reflection protection and temperature protection. The reflection protection couples a single intermediate power signal through the third power coupler, outputs a third detection signal through the third detector, and then compares the DC voltage value of the third detection signal with the preset voltage value through the reflection protection circuit, and compares the reflected power value of the third detection signal with the preset reflected power value. If the DC voltage value or the reflected power value exceeds the preset voltage value or the reflected power value, the reflection protection circuit outputs a reflection control signal to the monitoring module. For example, the final output power of the present invention is 2000W, and the total reflected power of each power amplifier module reaches 160W. At this time, the standing wave of the whole machine is about 1.8, and this time is set as the reflection power protection point. That is, when the reflected power of each power amplifier module is ≥160W, the reflection protection circuit outputs a reflection control signal to the monitoring module. The temperature protection performs temperature detection on the power amplifier module through the temperature protection circuit. When the temperature of the protection point exceeds the preset temperature value, for example, the preset temperature value is 100°C, the temperature protection circuit outputs a temperature control signal to the monitoring module.

[0027] In this embodiment, Figure 4 As shown, the power combiner adopts a Ka-band kilowatt-class continuous wave broadband eight-way power combiner with a waveguide H-plane coupling bridge. The structure of the power divider is symmetrical to the power combiner. The power divider includes a cavity, an input waveguide interface arranged on the front side of the cavity, and eight output waveguide interfaces arranged on the rear side of the cavity. By adopting a power combiner and a power coupler with a waveguide H-plane coupling bridge, the effect of the two-sideband drop of each port under wide-band conditions can be effectively reduced, the transmission bandwidth can be greatly widened, and excellent transmission characteristics can be achieved. The Ka-band kilowatt-class continuous wave broadband eight-way power combiner has been described in the Chinese invention patent with publication number CN118099697A, and the present invention will not repeat it.

[0028] In this embodiment, Figure 5 As shown, the monitoring module includes a monitoring mainboard and an interface component. The monitoring mainboard includes a CPU. The CPU is connected to an IO interface circuit, an AD sampling circuit, a network module or a 485 transmission module. The 485 transmission module is connected to each power amplifier module. The AD sampling circuit is used to connect to the output end of the first detector, the output end of the second detector or the output end of the third detector. The IO interface circuit is used to connect to a linearizer, a radio frequency switch or a voltage-controlled attenuator. The network module is used to connect to a remote control device.

[0029] In this embodiment, the power of the voltage-controlled attenuator is set by the monitoring module, and the output power and accuracy of the final-stage power coupling signal coupled by the first power coupler are controlled and adjusted. The specific process is: the monitoring module receives the preset power instruction output by the remote control device, calculates the preset attenuation value according to the preset power instruction, adjusts the voltage of the voltage-controlled attenuator to set the attenuation amount, and then compares the output power of the collected final-stage power coupling signal with the preset power, calculates the actual attenuation value according to the difference between the output power and the preset power, and adjusts the attenuation amount of the voltage-controlled attenuator according to the difference between the actual attenuation value and the preset attenuation value, so that the output power of the collected final-stage power coupling signal approaches the preset power value.

[0030] The monitoring module controls the voltage-controlled attenuator, RF suppression or enabling function through the IO interface circuit; receives the second detection signal through the AD sampling circuit to collect the input level, receives the third detection signal and the final power coupling signal to collect, transform, sample and process the output power and reflected power, collect information in real time and report it for display.

[0031] In this embodiment, the power supply module includes a high-voltage power supply, and the high-voltage power supply is connected to the traveling wave tube amplifier and the monitoring module.

[0032] In this embodiment, Figure 6-9 As shown, in order to improve the heat dissipation capacity and quickly dissipate the heat in the amplifier, the heat dissipation module includes a main heat sink 701 and an auxiliary heat sink 702 which are symmetrically arranged. The main heat sink 701 includes a main cold plate and main heat dissipation ribs. The main cold plate is arranged at the outer end of the main heat dissipation ribs. The auxiliary heat sink 702 includes an auxiliary cold plate and auxiliary heat dissipation ribs. The auxiliary cold plate is arranged at the outer end of the auxiliary heat dissipation ribs. A pressure isolation rib is arranged between the inner end of the main heat dissipation rib and the inner end of the auxiliary heat dissipation rib.

[0033] The main cold plate is provided with a heat pipe group for conducting heat from the inside of the main cold plate to the outside. A plurality of cooling fans 703 are arranged side by side at one of the heat conducting ends of the main cold plate. The heat pipe group includes a main heat pipe group and a secondary heat pipe group with opposite heat conducting directions. Both the main heat pipe group and the secondary heat pipe group include a plurality of heat pipes arranged side by side. In order to improve the heat dissipation efficiency, a cooling fan 703 is also arranged side by side at one end of the secondary cold plate and is located below the cooling fan 703 on the main cold plate.

[0034] In this embodiment, when the saturated output power of a single traveling wave tube amplifier is about 350W, its efficiency is about 32%. Therefore, the power consumption of a single traveling wave tube amplifier is about 1100W, and the heat dissipation is about 750W. Since the heat dissipation problem of the present invention mainly lies in the high heat density, the heat dissipation power of each power amplifier module reaches about 1000W, but the heat dissipation surface area between it and the heat dissipation module is small, so the main cold plate of the main radiator 701 is set below the drive control module 1, the power distributor 2, the eight-way power amplifier module 3, the power synthesizer 4, and the monitoring module 5, and the auxiliary cold plate of the auxiliary radiator 702 is set below the high-voltage power supply 8, and the heat conduction pipe group is used to conduct heat to two directions of the main cold plate to achieve the purpose of rapid uniform heat dissipation of the entire heat dissipation surface.

[0035] In this embodiment, the auxiliary radiator 702 has a large difference in the heat dissipation power carried by the main radiator 701 of the traveling wave tube amplifier and the auxiliary radiator 702 of the high-voltage power supply 8. Therefore, the number of required cooling fans and the wind pressure of the air duct are quite different. In order to ensure the heat dissipation capacity of the main radiator 701 and the auxiliary radiator 702, different heat dissipation forms need to be adopted, including the height and thickness of the heat dissipation fins, the gap of the air duct, the pressure in the air duct, etc. In this embodiment, a thermal simulation analysis is performed on the main radiator 701, and the cooling fans are arranged side by side. The thermal conductivity of the heat pipe of the heat pipe group is set to 10000 (w / m·k). The simulated ambient temperature is 50°C, and forced air cooling is used for heat dissipation. The simulation results are as follows: Fig.11 From the simulation results, when the ambient temperature is 50°C, the main radiator 701 is equipped with a heat pipe group and seven cooling fans 703 for forced heat dissipation, and the maximum temperature rise is 21.3°C, that is, the main radiator has high heat dissipation efficiency and can achieve rapid heat dissipation of the power amplifier.

[0036] In this embodiment, Fig.10 As shown, the power amplifier is set in the box 9, and the size of the box 9 is about: 922mm (length) × 886mm (height) × 460mm (width). In order to ensure the stability and structural strength of each structural unit, a distributed frame is set inside the box 9 to provide support, save space, and improve integration. The frame is fixed and strengthened by steel bars. The air duct of the cooling fan 703 of the heat dissipation module is connected to the outside of the box 9. There are multiple heat dissipation holes 10 on the outer wall of the box 9. Fig.12 As shown, the power divider 2 and the power combiner 4 are both integrated to increase the mechanical performance of the power amplifier and improve the index and reliability of the power amplifier. The waveguide components of the present invention are cut and processed by high-speed CNC machining machines to ensure the accuracy of the power amplifier.

[0037] The present invention realizes the synthesis of eight-way traveling wave tube power within the 4GHz bandwidth of the Ka band, and realizes the low-loss, 2000W continuous wave high power transmission capability by adopting the traveling wave tube amplifier and the eight-way branching and synthesis form. It realizes the synthesis of multi-way power amplification based on vacuum electron tubes, and improves the power capacity of the power amplifier.

[0038] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined by the claims.

Claims

1. A Ka-band 2000W continuous wave power amplifier, characterized in that: It includes a drive control module, a power distributor, an eight-way power amplifier module, a power synthesizer and a monitoring module; The drive control module is used to drive and amplify the input low-power signal and adjust the level, and output the primary power signal; The power divider is used for dividing the primary power signal into eight equal-amplitude primary power signals; Each power amplifier module is used to amplify the power of a single-channel equal-amplitude primary power signal to obtain a single-channel intermediate power signal; The power combiner is used to combine eight single-channel intermediate power signals into one channel and output a final power signal; The monitoring module is connected to the drive control module and each power amplifier module respectively, and the monitoring module is used to monitor and protect the primary power signal, the eight intermediate power signals and the final power signal; Each power amplifier module includes an amplitude and phase adjustment circuit and a traveling wave tube amplifier. The output end of the amplitude and phase adjustment circuit is connected to the signal input end of the traveling wave tube amplifier. The amplitude and phase adjustment circuit is used to perform amplitude adjustment and phase adjustment on the input single-channel equal-amplitude primary power signal and output the signal after amplitude and phase adjustment. The traveling wave tube amplifier is used to excite and amplify the signal after amplitude and phase adjustment and then output a single-channel intermediate power signal.

2. The Ka-band 2000W continuous wave power amplifier according to claim 1, characterized in that: It also includes a first power coupler, the input end of the first power coupler is connected to the output end of the power synthesizer, the first output end of the first power coupler is used to output the final stage power main signal, the second output end of the first power coupler is connected to the first detector, the output end of the first detector is connected to the monitoring module, the first power coupler is used to couple the final stage power signal and output the final stage power coupled signal for detection, the first detector is used to detect the final stage power coupled signal and output a first detection signal, and the monitoring module is used to monitor and protect the first detection signal.

3. The Ka-band 2000W continuous wave power amplifier according to claim 1, characterized in that: The drive control module includes a first isolator, a linearizer, a first amplifier, a voltage-controlled attenuator, a second amplifier, a radio frequency switch and a second isolator connected in sequence; the input end of the first isolator is used to receive a low-power signal, and the output end of the second isolator is used to output a primary power signal.

4. The Ka-band 2000W continuous wave power amplifier according to claim 3, characterized in that: The drive control module also includes a second power coupler, an input end of the second power coupler is connected to an output end of the first isolator, a first output end of the second power coupler is connected to a second detector, an output end of the second detector is connected to a monitoring module, a second output end of the second power coupler is used to connect to an external load, the second power coupler is used to couple out a low-power signal isolated by the first isolator, the second detector is used to detect the signal coupled out by the second power coupler and then output a second detection signal, and the monitoring module is used to monitor and protect the second detection signal.

5. The Ka-band 2000W continuous wave power amplifier according to claim 1, characterized in that: Each power amplifier module also includes a third power coupler and a third detector. The input end of the third power coupler is connected to the signal output end of the traveling wave tube amplifier. The first output end of the third power coupler is used to output a single-channel intermediate power signal. The second output end of the third power coupler is connected to the third detector. The output end of the third detector is connected to the monitoring module. The third power coupler is used to couple out a single-channel intermediate power signal. The third detector is used to output a third detection signal after detecting the coupled single-channel intermediate power signal. The monitoring module is used to monitor and protect the third detection signal.

6. The Ka-band 2000W continuous wave power amplifier according to claim 4 or 5, characterized in that: The monitoring module includes a monitoring mainboard and an interface component. The monitoring mainboard includes a CPU. The CPU is connected to an IO interface circuit, an AD sampling circuit, a network module or a 485 transmission module. The 485 transmission module is connected to each power amplifier module. The AD sampling circuit is used to connect to the output end of the first detector, the output end of the second detector or the output end of the third detector. The IO interface circuit is used to connect to a linearizer, a radio frequency switch or a voltage-controlled attenuator. The network module is used to connect to a remote control device.

7. The Ka-band 2000W continuous wave power amplifier according to claim 5, characterized in that: A control and protection circuit is arranged inside each power amplifier module, and the monitoring mainboard is connected to the control and protection circuit. The control and protection circuit includes a temperature protection circuit and a reflection protection circuit. The input end of the reflection protection circuit is connected to the output end of the third detector, and the output end of the reflection protection circuit and the output end of the temperature protection circuit are both connected to the input end of the monitoring module.

8. The Ka-band 2000W continuous wave power amplifier according to claim 1, characterized in that: It also includes a heat dissipation module, which includes a main heat sink and an auxiliary heat sink that are symmetrically arranged, the main heat sink includes a main cold plate and a main heat dissipation fin, the main cold plate is arranged at the outer end of the main heat dissipation fin, the auxiliary heat sink includes an auxiliary cold plate and an auxiliary heat dissipation fin, the auxiliary cold plate is arranged at the outer end of the auxiliary heat dissipation fin, and a pressure isolation fin is arranged between the inner end of the main heat dissipation fin and the inner end of the auxiliary heat dissipation fin; The main cold plate is provided with a heat conduction pipe group for conducting heat from the inside of the main cold plate to the outside, and a plurality of cooling fans are arranged side by side at one of the heat conduction ends of the main cold plate. The heat conduction pipe group includes a main heat conduction pipe group and a sub heat conduction pipe group with opposite heat conduction directions, and the main heat conduction pipe group and the sub heat conduction pipe group both include a plurality of heat conduction pipes arranged side by side.

9. The Ka-band 2000W continuous wave power amplifier according to claim 1, characterized in that: It also includes a power supply module for providing a working voltage, wherein the power supply module includes a high-voltage power supply, and the high-voltage power supply is connected to the traveling wave tube amplifier and the monitoring module.

10. The Ka-band 2000W continuous wave power amplifier according to claim 1, characterized in that: The power combiner adopts a Ka-band kilowatt-class continuous wave broadband eight-way power combiner with a waveguide H-plane coupling bridge. The structure of the power divider is symmetrical to the power combiner. The power divider includes a cavity, an input waveguide interface arranged on the front side of the cavity, and eight output waveguide interfaces arranged on the rear side of the cavity.

Images