A high power microwave generating device and method

Abstract

The present invention provides a high-power microwave generating device and method, the generating device includes a centralized controller, a signal source, a first-level solid-state amplifier, a power divider, a plurality of identical second-level solid-state amplifiers, a plurality of identical klystrons, a synthesizer and a pulse compression device; the centralized controller is connected to the signal source, the signal source is connected to the first-level solid-state amplifier, the first-level solid-state amplifier is connected to the power divider, the power divider is connected to a plurality of identical second-level solid-state amplifiers, the plurality of second-level solid-state amplifiers are respectively connected to corresponding klystrons, the klystrons are respectively connected to the synthesizer, the synthesizer is connected to the pulse compression device, and the pulse compression device further amplifies the synthesized radio frequency signal. The implementation method of the present invention is simple, low in cost, high in reliability, small in size, and has certain maneuverability; at the same time, the invention can also be used as a transmitter of an integrated design such as a high-power radar, a jammer, and a microwave weapon.

Description

Technical Field

[0001] The present invention relates to the technical field of high-power microwaves, and in particular to a high-power microwave generating device and method. Background Art

[0002] High-power microwaves have important application value in the fields of national defense, energy, aerospace, and high-energy physics. The application demand of high-power microwaves determines that improving microwave output capacity is an important development direction of high-power microwave systems. Due to the limitations of the physical generation mechanism of high-power microwaves and the process structure of devices, various microwave sources have their power limitations. In order to break through the limitations of the output power of a single device, it is necessary to carry out research on power synthesis technology. Especially in military applications, research by the United States, Russia and other countries has shown that the technological integration between radar, electronic warfare and missile defense is gradually accelerating, and the integrated design of radar and high-power microwave weapons has become a new type of electronic system equipment that integrates reconnaissance, interference and attack. Therefore, power synthesis technology based on coherent radiation sources has developed rapidly under the demand of applications. At the same time, in order to meet application requirements, the compactness and lightness of high-power microwave systems are the focus of their development, and are also the key to improving the mobility of the system and expanding the scope of application. The technical scheme for power synthesis in the prior art, such as the synthesis method adopted in the document "Conventional Klystron Space Power Synthesis Microwave Source", uses conventional electromagnetic focusing klystrons, which requires additional focusing magnetic field power supply, the system adjustment is relatively complicated, and requires additional heat dissipation equipment, resulting in a large system volume and low efficiency; the klystron voltage in the document exceeds 320kV, and the insulation requirements of the pulse modulator are relatively high, resulting in a large system volume and heavy weight, which limits its use platform; the document adopts an inductive superposition pulse modulator, and then drives the pulse transformer to boost the voltage, using multiple high-voltage and high-power IGBT modules and induction transformers, which is costly, and at the same time, the voltage outside the high-voltage oil tank is relatively high, the insulation requirements are high, and the volume is large. At the same time, in the scheme of using a pulse compression device to increase the peak power of high-power microwaves in the prior art, the pulse compression device using a single SLAC energy multiplier is a narrowband system, resulting in the entire high-power microwave generating device is also a narrowband system, and the volume of the SLAC energy multiplier is relatively large, resulting in a large volume of the high-power microwave generating device. Summary of the invention

[0003] In order to solve the problems of large system volume, heavy weight and high cost in the high-power microwave synthesis in the prior art, the present invention provides a compact, lightweight and low-cost high-power microwave generating device.

[0004] Specifically, the present invention provides a high-power microwave generating device, characterized in that the microwave generating device comprises a centralized controller, a signal source, a primary solid-state amplifier, a power divider, a plurality of identical secondary solid-state amplifiers, a plurality of identical klystrons, a synthesizer and a pulse compression device;

[0005] The centralized controller is connected to the signal source and is used to control the signal source to generate an initial radio frequency pulse signal;

[0006] The signal source is connected to the first-stage solid-state amplifier and is used to generate the initial radio frequency pulse signal;

[0007] The first-stage solid-state amplifier is connected to the power divider and is used to preliminarily amplify the initial radio frequency signal to obtain a first-stage amplified radio frequency pulse signal;

[0008] The power divider is connected to each of the secondary solid-state amplifiers respectively, and is used to divide the primary amplified radio frequency pulse signal into a plurality of identical distributed radio frequency pulse signals;

[0009] The plurality of secondary solid-state amplifiers are respectively connected to corresponding permanent magnet focusing klystrons, and are used to amplify the multi-channel distributed radio frequency pulse signals into secondary amplified radio frequency pulse signals;

[0010] The plurality of permanent magnet focusing klystrons are connected to the synthesizer and are used to amplify the plurality of secondary amplified radio frequency pulse signals into radio frequency pulse signals to be synthesized;

[0011] The synthesizer is connected to the pulse compression device and is used to synthesize the multiple channels of radio frequency pulse signals to be synthesized to generate a synthesized radio frequency signal;

[0012] The pulse compression device uses a plurality of spherical cavity energy multipliers connected in series to further amplify the synthesized radio frequency signal to obtain an output radio frequency pulse signal.

[0013] Furthermore, the microwave generating device includes a pulse modulator, which is connected to the centralized controller and is used to generate high-voltage modulated pulses to drive the permanent magnet focusing klystron according to the timing and command signals of the centralized controller.

[0014] Furthermore, the microwave generating device includes a phase flip switch, which is respectively connected to the signal source and the centralized controller, and is used to flip the phase of the initial RF signal sent by the signal source by 180° in a timely manner according to the timing and command signals of the centralized controller.

[0015] Furthermore, the microwave generating device includes a plurality of phase shifters, which are respectively connected to the secondary solid-state amplifier and the centralized controller. The phase shifters adjust the phase of the secondary amplified RF pulse signal according to the command signal of the centralized controller, and report the adjustment result to the centralized controller.

[0016] Furthermore, the pulse modulator includes a plurality of high-voltage pulse transformers, each of which includes a plurality of primary windings connected in parallel, each of which corresponds to one of the pulse modulation components, and the secondary windings of the plurality of high-voltage pulse transformers are connected in series in sequence.

[0017] A high-power microwave generation method based on the microwave generating device is also provided, characterized in that the microwave generation method comprises the following steps:

[0018] Step S1, a signal source generates an initial radio frequency pulse signal P1, and amplifies the initial radio frequency pulse signal P1 to generate a first-stage amplified radio frequency pulse signal P2;

[0019] Step S2, evenly distributing the first-stage amplified radio frequency pulse signal P2 to obtain multiple identical distributed radio frequency pulse signals P31-P3N;

[0020] Step S3, the multiple channels of distributed RF pulse signals P31-P3N are respectively amplified in the same manner to obtain multiple channels of RF pulse signals P51-P5N to be synthesized;

[0021] Step S4, after the radio frequency pulse signals to be synthesized P51-P5N are power synthesized, a synthesized radio frequency pulse signal P6 is obtained;

[0022] Step S5, the synthesized RF pulse signal P6 is pulse compressed to finally generate an output RF pulse signal P7.

[0023] Furthermore, in step S1, the initial RF pulse signal P1 is timely flipped by a phase flip switch by 180° according to the timing and command signal of the centralized controller.

[0024] Furthermore, in step S3, the distributed radio frequency pulse signals P31-P3N are respectively amplified by the same two-stage solid-state amplifier to obtain multiple two-stage amplified radio frequency pulse signals P41-P4N.

[0025] Furthermore, in step S3, the secondary amplified RF pulse signals P41-P4N are adjusted through a phase shifter controlled by a centralized controller to adjust the phase of the RF signal sent from the secondary solid-state amplifier.

[0026] Furthermore, in step S3, the secondary amplified RF pulse signals P41-P4N are input into the klystron after phase adjustment, and are amplified by the klystron to obtain the RF pulse signals P51-P5N to be synthesized.

[0027] The beneficial effects of the present invention are:

[0028] The high-power microwave generating device provided in the present invention can generate a radio frequency output power of hundreds of megawatts. The invention can also be used as an integrated transmitter of high-power radar, jammer and microwave weapon. The invention is simple to implement, low in cost, highly reliable, small in size, and has certain mobility, and can be used on vehicle-mounted platforms.

[0029] Compared with the electromagnetic focusing klystron used in the dual klystron synthesis method commonly used in the prior art, the present invention adopts a permanent magnet focusing klystron, which does not require an additional magnetic field power supply, and the entire system adopts natural cooling, without the need for additional heat dissipation equipment. The electromagnetic focusing klystron in the prior art requires an additional magnetic field power supply, and each klystron needs to adjust the magnetic field parameters, the system adjustment is relatively complicated, and an additional heat dissipation equipment is required, resulting in a large system volume and low efficiency.

[0030] Compared with the dual klystron microwave synthesis method used in the prior art, the present invention adopts a low-power klystron, each klystron has a lower output power, and adopts 4 tubes for synthesis. More klystrons can also be used for synthesis to achieve an output power of 100 MW. The voltage and current requirements of the klystron are lower than those in the prior art, the system development difficulty is low, the volume is small, and it can be used on a vehicle-mounted platform to provide a high-power microwave transmitter for vehicle-mounted high-power radars, jammers, and microwave weapons. In the absence of pulse compression in the prior art, to achieve an output power of 100 MW, each klystron must reach an output power of at least 50 MW, the voltage and current requirements of the klystron are relatively high, and the insulation requirements for the pulse modulator are relatively high, resulting in a high system difficulty and a large volume, resulting in low mobility and limiting the application platform.

[0031] Compared with the high-power microwave generator using a single pulse compression device in the prior art, the present invention uses a plurality of pulse compression devices with different operating frequencies connected in series in sequence, the operating frequency of each pulse compression device in series increases in sequence according to its bandwidth, and each compression device meets a certain bandwidth requirement, so that the entire high-power microwave generator has a certain bandwidth working capacity. In the prior art, a single pulse compression device is a narrowband system, resulting in the entire high-power microwave generator being a narrowband system as well.

[0032] Compared with the SLAC energy multiplier in the prior art, the present invention adopts a spherical cavity energy multiplier as a pulse compression device, which has the advantages of small size and compact structure. The SLAC energy multiplier in the prior art is relatively large in size.

[0033] Compared with the inductive superposition pulse modulator in the prior art, the present invention adopts multiple pulse modulation components to drive a high-ratio step-up transformer, and the transformer secondary is connected in series to step up the voltage, which reduces the voltage of the primary pulse modulation component; each primary pulse modulation component can use industrial low-voltage IGBT, without the need to use a large number of inductive superposition magnetic cores, and the system cost is greatly reduced; at the same time, the voltage outside the high-voltage oil tank is very low, and the insulation requirements are low, which reduces the difficulty of research and development and the requirements for the external environment. The inductive superposition pulse modulator in the prior art uses multiple high-voltage and high-power IGBT modules and induction transformers, which are costly; at the same time, the voltage outside the high-voltage oil tank is high, the insulation requirements are high, and the volume is large.

[0034] Compared with the scheme in the document "Conventional Klystron Space Power Synthesis Microwave Source", the high-power microwave generating device provided in the present invention has a volume reduced by more than 40%, a weight reduced by more than 30%, and a development cost reduced by more than 20% when generating microwave pulses of the same power, and can better adapt to vehicle-mounted platforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of a high-power microwave generating device provided by the present invention;

[0036] Figure 2 It is a schematic diagram of signal amplification, synthesis and compression of a high-power microwave generating device provided by the present invention;

[0037] Figure 3 It is a schematic diagram of a pulse modulator in a high-power microwave generating device provided by the present invention;

[0038] Figure 4 It is a schematic diagram of the steps of a high-power microwave generation method provided by the present invention. DETAILED DESCRIPTION

[0039] The following are examples and the attached Figure 1-4 , the technical solution of the present invention is further specifically described.

[0040] As attached Figure 1 As shown, a high-power microwave generating device includes a signal source, a phase flip switch, a first-stage solid-state amplifier, a power divider, first to fourth second-stage solid-state amplifiers, first to fourth phase shifters, first to fourth adjustable attenuators, first to fourth permanent magnet focusing klystrons, first to fourth directional couplers, first to fourth circulators, a synthesizer, a pulse compression device, a pulse modulator and a centralized controller; wherein the first to fourth second-stage solid-state amplifiers, phase shifters, adjustable attenuators, permanent magnet focusing klystrons, directional couplers and circulators all adopt the same configuration.

[0041] The signal source is connected to the phase flip switch; the phase flip switch is connected to the first-level solid-state amplifier; the first-level solid-state amplifier is connected to the power divider; the power divider is respectively connected to the first to fourth second-level solid-state amplifiers; the first to fourth second-level solid-state amplifiers are respectively connected to the first to fourth phase shifters; the first to fourth phase shifters are respectively connected to the first to fourth adjustable attenuators; the first to fourth adjustable attenuators are respectively connected to the first to fourth permanent magnet focusing klystrons; the first to fourth permanent magnet focusing klystrons are respectively connected to the first to fourth directional couplers; the first to fourth directional couplers are respectively connected to the first to fourth circulators; the first to fourth circulators are respectively connected to the synthesizer; the synthesizer is connected to the pulse compression device; the centralized controller is connected to the signal source and the phase flip switch, and is respectively connected to the first to fourth phase shifters, and the centralized controller is connected to the pulse modulator; the pulse modulator is respectively connected to the first to fourth permanent magnet focusing klystrons.

[0042] The signal source generates an initial RF pulse signal that meets the requirements according to the timing and command signals of the centralized controller and sends it to the phase flip switch. The phase flip switch timely flips the phase of the initial RF pulse signal sent by the signal source by 180° according to the timing and command signals of the centralized controller. The first-stage solid-state amplifier amplifies the flipped initial RF pulse signal to generate a first-stage amplified RF pulse signal and sends it to the power divider. The power divider evenly divides the first-stage amplified RF pulse signal into four identical distribution RF pulse signals and sends them to the first to fourth second-stage solid-state amplifiers respectively.

[0043] The secondary solid-state amplifiers respectively amplify the four-way distributed RF pulse signals again to generate secondary amplified RF pulse signals, and transmit them to the corresponding phase shifters of each channel. The phase shifter adjusts the phase of the secondary amplified RF pulse signal according to the command signal of the centralized controller, and reports the adjustment result to the centralized controller. The adjustable attenuator adjusts the amplitude of the RF signal passing through the phase shifter, and sends the signal of appropriate size to the permanent magnet focusing klystron. The permanent magnet focusing klystron amplifies the RF signal again to generate the RF pulse signal to be synthesized. The permanent magnet focusing klystron in the present invention does not require an additional magnetic field power supply. Compared with the electromagnetic focusing klystron used in the prior art, it does not need to adjust the magnetic field parameters. The system adjustment is relatively simple. Since no additional magnetic field is required, and the entire system adopts natural cooling, no additional heat dissipation equipment is required, and the system size is small and the efficiency is high. At the same time, compared with the prior art that uses two electromagnetic focusing klystrons to synthesize to achieve an output power of hundreds of MW, the present invention uses four low-power klystrons, each of which has a low output power, and uses multi-tube synthesis to achieve an output power of hundreds of MW. The system has low development difficulty and small size, and can be used for vehicle-mounted platforms. The directional coupler provides the output power monitoring and end reflection power monitoring interfaces of the permanent magnet focusing klystron, which are used to measure the output power of each permanent magnet focusing klystron and the reflection power at the end in real time. The circulator is used to isolate the permanent magnet focusing klystron from the back-end synthesizer and pulse compression device to prevent the back-end impedance change from affecting or even harming the permanent magnet focusing klystron. The synthesizer performs power synthesis on the RF pulse signals to be synthesized sent by the first to fourth circulators and outputs a synthesized RF pulse signal.

[0044] The pulse compression device adopts a plurality of spherical cavity energy multipliers with different working frequencies which are connected in series in sequence, and the working frequency of each spherical cavity energy multiplier connected in series increases in sequence according to its bandwidth; the pulse compression device compresses the pulse width of the synthesized radio frequency pulse signal sent by the synthesizer to generate the final output radio frequency pulse signal, thereby improving the peak power, and the spherical cavity energy multiplier has the advantages of small size and compact structure; at the same time, compared with the narrowband system using a single pulse compression device in the prior art, in the application of the radar field, the narrowband cannot meet the requirements of radar detection. In the present invention, each spherical cavity energy multiplier meets a certain bandwidth requirement, and a plurality of spherical cavity energy multipliers connected in series have a certain bandwidth working capacity, and can provide a high-power microwave signal with a certain bandwidth for radar applications.

[0045] The pulse modulator generates high-voltage modulation pulses according to the timing and command signals of the centralized controller to drive four permanent magnet focusing klystrons; compared with the prior art that uses an inductive superposition pulse modulator to drive the pulse transformer to boost the voltage, multiple high-voltage and high-power IGBT modules and induction transformers are used, which are costly; at the same time, the voltage outside the high-voltage oil tank is relatively high, the insulation requirements are high, and the volume is large; the present invention uses multiple pulse modulation components to drive a high-ratio step-up transformer, and at the same time, the transformer secondary is connected in series to boost the voltage, which reduces the voltage of the primary pulse modulation component. Each primary pulse modulation component can use an industrial low-voltage IGBT, without the need to use a large number of inductive superposition magnetic cores, and the system cost is greatly reduced; at the same time, the voltage outside the high-voltage oil tank is very low, and the insulation requirements are low, which reduces the difficulty of research and development and the requirements for the external environment. The centralized controller realizes the centralized control function, monitors the working status of each circuit, samples key parameters, and realizes rapid protection. At the same time, EPLD or FPGA is used to generate different timing signals to control and adjust the signal source, phase flip switch, and the working sequence of the pulse modulator.

[0046] As attached Figure 2 As shown, the signal source generates an initial RF pulse signal P1 of the order of mW, which is amplified by a first-stage solid-state amplifier to obtain a first-stage amplified RF pulse signal P2 of the order of tens of mW. The first-stage amplified RF pulse signal P2 is evenly distributed by a power divider to obtain four identical mW-level distributed RF pulse signals P31-P34. The distributed RF pulse signals P31-P34 are respectively amplified by four identical second-stage solid-state amplifiers to obtain four second-stage amplified RF pulse signals P41-P44 of the order of hundreds of W to kW, which are used as excitation signals for permanent magnet focusing klystrons; the second-stage amplified RF pulse signals P41-P44 are respectively amplified by four identical permanent magnet focusing klystrons to obtain four MW-level RF pulse signals P51-P54 to be synthesized; the RF pulse signals P51-P54 to be synthesized are power synthesized by a synthesizer to output a synthesized RF pulse signal P6 of the order of tens of MW; the synthesized RF pulse signal P6 is pulse compressed by a pulse compression device to achieve an output RF pulse signal P7 of the order of hundreds of MW.

[0047] As attached Figure 3 As shown, the pulse modulator includes M high-voltage pulse transformers T1 to TM, each of which contains N primary windings connected in parallel, and each primary winding corresponds to a pulse modulation component. The secondary windings of the high-voltage pulse transformers T1 to TM are connected in series in sequence, with the high potential end of T1 serving as the high potential end of the pulse modulator output, and the low potential end of TM serving as the low potential end of the pulse modulator output. The pulse modulation component in the pulse modulator generates a high-voltage pulse signal to drive the primary winding of the corresponding high-voltage pulse transformer.

[0048] The working principle of the present invention is as follows: the signal source generates a milliwatt-level radio frequency pulse signal, which is amplified by a first-stage solid-state amplifier and then evenly distributed to four signal amplification links by a power divider. Each signal amplification link includes two stages of amplification, with a second-stage solid-state amplifier used in the front stage and a permanent magnet focusing klystron used in the final stage to amplify the milliwatt-level radio frequency pulse signal sent by the power divider to several megawatts. The radio frequency pulse signal output by the four-way amplification link passes through a synthesizer for power synthesis to achieve a radio frequency pulse signal of tens of megawatts, and then a pulse compression device is used for pulse compression, ultimately achieving a high-power microwave power output of hundreds of megawatts.

[0049] As attached Figure 4 As shown, the present invention also includes a high-power microwave generating method based on the high-power microwave generating device, the method comprising the following steps:

[0050] Step S1, a signal source generates an initial radio frequency pulse signal P1, and amplifies the initial radio frequency pulse signal P1 to generate a first-stage amplified radio frequency pulse signal P2;

[0051] Step S2, evenly distributing the first-stage amplified radio frequency pulse signal P2 to obtain multiple identical distributed radio frequency pulse signals P31-P3N;

[0052] Step S3, the distributed radio frequency pulse signals P31-P3N are respectively amplified in the same manner to obtain multiple radio frequency pulse signals P51-P5N to be synthesized;

[0053] Step S4, after the radio frequency pulse signals to be synthesized P51-P5N are power synthesized, a synthesized radio frequency pulse signal P6 is obtained;

[0054] Step S5, the synthesized RF pulse signal P6 is pulse compressed to finally generate an output RF pulse signal P7.

[0055] Specifically, in step S1, the signal source generates an initial RF pulse signal P1 of the order of mW, and the phase flip switch timely flips the phase of the initial RF pulse signal P1 sent by the signal source by 180° according to the timing and command signals of the centralized controller; and the flipped RF signal is amplified by a first-stage solid-state amplifier to obtain a first-stage amplified RF pulse signal P2 of the order of tens of mW.

[0056] In step S2, the first-stage amplified radio frequency pulse signal P2 is evenly distributed through a power divider to obtain a plurality of identical mW-level distributed radio frequency pulse signals P31-P3N.

[0057] In step S3, after the allocated RF pulse signals P31-P3N are respectively amplified by the same secondary solid-state amplifier, the secondary solid-state amplifier amplifies the RF signal again to obtain multiple secondary amplified RF pulse signals P41-P4N of hundreds of W to kW level; the phase shifter adjusts the phase of the RF signal sent by the secondary solid-state amplifier according to the command signal of the centralized controller, and reports the adjustment result to the centralized controller; the adjustable attenuator adjusts the amplitude of the RF signal passing through the phase shifter, and sends the RF signal of appropriate size to the permanent magnet focusing klystron; the permanent magnet focusing klystron amplifies the RF signal of appropriate size sent by the adjustable attenuator again to obtain multiple MW-level RF pulse signals P51-P5N to be synthesized; the directional coupler provides the permanent magnet focusing klystron output power monitoring and terminal reflection power monitoring interfaces for real-time measurement of the output power of each permanent magnet focusing klystron and the terminal reflection power; the circulator is used to isolate the permanent magnet focusing klystron from the back-end synthesizer and the pulse compression device to prevent the back-end impedance change from affecting or even harming the permanent magnet focusing klystron.

[0058] In step S4, the synthesizer performs power synthesis on the RF pulse signals P51-P54 to be synthesized, and outputs a synthesized RF pulse signal P6 of the order of tens of MW.

[0059] In step S5, the synthesized RF pulse signal P6 is pulse compressed. The pulse compression device compresses the pulse width of the high-power RF signal sent by the synthesizer to increase the peak power and output an output RF pulse signal P7 of the order of hundreds of MW.

[0060] Although the present invention has been disclosed as above with preferred embodiments, the embodiments are not intended to limit the present invention. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the content defined by the claims of this application.

Claims

1. A high-power microwave generating device, characterized in that: The microwave generating device comprises a centralized controller, a signal source, a primary solid-state amplifier, a power divider, a plurality of identical secondary solid-state amplifiers, a plurality of identical klystrons, a synthesizer and a pulse compression device; The centralized controller is connected to the signal source and is used to control the signal source to generate an initial radio frequency pulse signal; The signal source is connected to the first-stage solid-state amplifier and is used to generate the initial radio frequency pulse signal; The first-stage solid-state amplifier is connected to the power divider and is used to preliminarily amplify the initial radio frequency signal to obtain a first-stage amplified radio frequency pulse signal; The power divider is connected to each of the secondary solid-state amplifiers respectively, and is used to divide the primary amplified radio frequency pulse signal into a plurality of identical distributed radio frequency pulse signals; The plurality of secondary solid-state amplifiers are respectively connected to corresponding permanent magnet focusing klystrons, and are used to amplify the multi-channel distributed radio frequency pulse signals into secondary amplified radio frequency pulse signals; The plurality of permanent magnet focusing klystrons are connected to the synthesizer and are used to amplify the plurality of secondary amplified radio frequency pulse signals into radio frequency pulse signals to be synthesized; The synthesizer is connected to the pulse compression device and is used to synthesize the multiple channels of radio frequency pulse signals to be synthesized to generate a synthesized radio frequency signal; The pulse compression device uses a plurality of spherical cavity energy multipliers connected in series to further amplify the synthesized radio frequency signal to obtain an output radio frequency pulse signal; The microwave generating device comprises a pulse modulator, which is connected to the centralized controller and is used to generate high voltage modulated pulses according to the timing and command signals of the centralized controller to drive the permanent magnet focusing klystron; The microwave generating device comprises a phase flip switch, which is respectively connected to the signal source and the centralized controller and is used to timely flip the phase of the initial radio frequency signal sent by the signal source by 180° according to the timing and command signals of the centralized controller.

2. The microwave generating device according to claim 1, characterized in that: The microwave generating device includes a plurality of phase shifters, which are respectively connected to the secondary solid-state amplifier and the centralized controller. The phase shifters adjust the phase of the secondary amplified radio frequency pulse signal according to the command signal of the centralized controller, and report the adjustment result to the centralized controller.

3. The microwave generating device according to claim 1, characterized in that: The pulse modulator includes a plurality of high-voltage pulse transformers, each of which includes a plurality of primary windings connected in parallel, each of which corresponds to a pulse modulation component, and the secondary windings of the plurality of high-voltage pulse transformers are connected in series in sequence.

4. A high-power microwave generating method based on the microwave generating device according to any one of claims 1 to 3, characterized in that: The microwave generation method comprises the following steps: Step S1, a signal source generates an initial radio frequency pulse signal P1, and amplifies the initial radio frequency pulse signal P1 to generate a first-stage amplified radio frequency pulse signal P2; Step S2, evenly distributing the first-stage amplified radio frequency pulse signal P2 to obtain multiple identical distributed radio frequency pulse signals P31-P3N; Step S3, the multiple channels of distributed RF pulse signals P31-P3N are respectively amplified in the same manner to obtain multiple channels of RF pulse signals P51-P5N to be synthesized; Step S4, after the radio frequency pulse signals to be synthesized P51-P5N are power synthesized, a synthesized radio frequency pulse signal P6 is obtained; Step S5, the synthesized RF pulse signal P6 is pulse compressed to finally generate an output RF pulse signal P7.

5. The microwave generating method according to claim 4, characterized in that: In step S1, the phase of the initial RF pulse signal P1 sent from the signal source is flipped by 180° in a timely manner by a phase flip switch according to the timing and command signal of the centralized controller.

6. The microwave generating method according to claim 4, characterized in that: In step S3, the distributed radio frequency pulse signals P31-P3N are respectively amplified by the same two-stage solid-state amplifier to obtain multiple two-stage amplified radio frequency pulse signals P41-P4N.

7. The microwave generating method according to claim 6, characterized in that: In step S3, the secondary amplified RF pulse signals P41-P4N are adjusted through a phase shifter controlled by a centralized controller to adjust the phase of the RF signal sent from the secondary solid-state amplifier.

8. The microwave generating method according to claim 7, characterized in that: In step S3, the secondary amplified RF pulse signals P41-P4N are input into the klystron after phase adjustment, and are amplified by the klystron to obtain the RF pulse signals P51-P5N to be synthesized.

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