Method and device for suppressing radio frequency leakage of a grid-controlled multi-beam klystron radar transmitter

Abstract

The embodiment of the application discloses a method and device for inhibiting RF leakage of a grid-controlled multi-beam klystron radar transmitter; the method comprises the following steps: starting the radar transmitter to make it in a working state; controlling the synchronizer to perform AND logic operation on the excitation on-off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal; based on pulse shaping and amplitude amplification, the modulating pulse generating module converts the controlled modulator working pulse signal into a controlled modulating pulse signal and sends the controlled modulating pulse signal to the grid stage of the multi-beam klystron; if the cathode high voltage of the multi-beam klystron of the radar transmitter is normal and the excitation communication signal exists, the controlled modulating pulse signal is sent to the grid stage of the multi-beam klystron, and the multi-beam klystron normally works to amplify the signal; if the cathode high voltage of the multi-beam klystron of the radar transmitters is normal but the excitation off signal exists, the grid stage of the multi-beam klystron has no controlled modulating pulse signal, so that the electron beam of the cathode of the multi-beam klystron is in a cut-off state; the embodiment of the application generates the modulating pulse signal controlled by the excitation on-off signal, avoids the multi-beam klystron in the intermittent conduction state when there is no RF excitation signal input, and can achieve the purpose of inhibiting the RF leakage of the grid-controlled multi-beam klystron radar transmitter in this state, and eliminates the adverse effects of RF leakage on the safety of frequency equipment.

Description

Technical Field

[0001] This application relates to the field of radar technology, and in particular to a method and apparatus for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter. Background Technology

[0002] In existing grid-controlled multi-beam klystron pulse radar transmitter structures, the power RF signal is generated and sent to the multi-beam klystron. The modulation pulse is generated after the cathode voltage of the multi-beam klystron in the radar transmitter is normalized. Therefore, in actual use, regardless of the presence of an RF excitation signal, the multi-beam klystron, after the cathode voltage is normalized, is controlled by the modulation pulse and is effectively in a state of intermittent conduction. Due to the influence of various factors such as cathode voltage, injection current, modulation pulse, filament, focusing system, and output cavity, the multi-beam klystron cannot operate in an ideal state. In the absence of an RF excitation signal, RF noise may be output, i.e., in-band noise from the transmitter may exist.

[0003] In-band noise is an inherent characteristic of multi-beam klystrons (MBKs) and a common characteristic of microwave vacuum tubes. Transmitter in-band noise can only be suppressed by improving the MBK itself and its peripheral circuitry. Existing techniques, such as improving manufacturing and assembly processes and reducing MBK gain, can reduce output noise to some extent, but the improvement is very limited. Furthermore, by rationally designing the external power supply and circuitry of the MBK, RF noise output can also be reduced; for example, by improving high-voltage power supply ripple and increasing the rectangularity of the modulator output modulation pulse. However, these methods are difficult to completely eliminate its influence and are relatively difficult to implement.

[0004] In the military field, electromagnetic spectrum control requirements for frequency-using equipment such as radar and communications are stringent. The radio frequency leakage problem of multi-beam klystrons in the absence of radio frequency excitation signals can adversely affect the safety of frequency-using equipment, such as electromagnetic interference or signal interception. In addition, if the radio frequency signal leakage of multi-beam klystrons is suppressed by "disconnecting the high voltage (cathode high voltage)," the high voltage must be "re-applied (cathode high voltage)" when normal air-to-air radiation signals are needed. The repeated raising and lowering of the high voltage has a long waiting time, which is not conducive to the rapid response of the radar system and may also have certain safety impacts on the radar transmitter system circuit itself. Summary of the Invention

[0005] This application provides a method and apparatus for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter, in order to address the problem that existing multi-beam klystron radar transmitters may adversely affect the safety of frequency-using equipment and may also cause certain safety impacts on the radar transmitter system circuitry itself.

[0006] In a first aspect, embodiments of this application provide a method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter, the method comprising the following steps:

[0007] Turn on the radar transmitter to put it into working condition;

[0008] The control synchronizer performs an AND logic operation on the excitation on / off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal;

[0009] Based on pulse shaping and amplitude amplification, the modulation pulse generation module converts the controlled modulator working pulse signal into a controlled modulation pulse signal and sends it to the multi-beam klystron gate.

[0010] If the cathode high voltage of the multi-beam klystron in the radar transmitter is normal and there is an excitation signal, the controlled modulation pulse signal is sent to the grid of the multi-beam klystron, and the multi-beam klystron works normally to amplify the signal.

[0011] If the high voltage of the cathode of the multi-beam klystron in the radar transmitter is normal but there is an excitation interruption signal, there will be no controlled modulation pulse signal at the grid level of the multi-beam klystron, so that the electron beam of the cathode of the multi-beam klystron will be in the cut-off state.

[0012] Furthermore, after activating the radar transmitter to put it into working condition, the process also includes:

[0013] The frequency synthesizer generates an RF excitation signal, which is then amplified to obtain a medium-power RF signal and sent to a multi-beam klystron.

[0014] Furthermore, the step of generating an RF excitation signal through a frequency synthesizer, amplifying it, obtaining a medium-power RF signal, and sending it to a multi-beam klystron includes:

[0015] The frequency synthesizer generates an RF excitation signal and sends it to a solid-state amplifier.

[0016] Send an excitation signal to the solid-state amplifier to control the solid-state amplifier to convert the RF excitation signal into a medium-power RF signal and send it to the multi-beam klystron.

[0017] Furthermore, the method for enabling the multi-beam speed controller to function normally for signal amplification and output includes:

[0018] This allows the multi-beam klystron to receive a controlled modulation pulse signal, amplify the medium-power radio frequency signal, convert it into a high-power radio frequency signal, and then output it.

[0019] Furthermore, the modulation pulse generation module, based on pulse shaping and amplitude amplification, converts the controlled modulator operating pulse signal into a controlled modulation pulse signal, including:

[0020] Based on pulse shaping and amplitude amplification operations, the controlled modulator working pulse signal is converted into a controlled pre-modulated pulse signal by the pre-modulator and sent to the modulator. Combined with the normal signal conditions of the high voltage at the cathode of the multi-beam klystron, the controlled pre-modulated pulse signal is converted into a controlled modulated pulse signal by the modulator and sent to the multi-beam klystron.

[0021] Furthermore, after converting the controlled modulator's working pulse signal into a controlled modulated pulse signal and sending it to the multi-beam klystron based on pulse shaping and amplitude amplification operations to enable the multi-beam klystron to operate normally for signal amplification and output, the method further includes:

[0022] The high-power radio frequency signals generated by the multi-beam klystron are isolated and transmitted using a circulator.

[0023] Furthermore, after transmitting the high-power radio frequency signal generated by the multi-beam klystron through the circulator, the method further includes:

[0024] The high-frequency radio frequency signal of the circulator is further transmitted through a radar feed.

[0025] In a second aspect, embodiments of this application also provide a device for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter, comprising:

[0026] Transmitter activation module, used to activate the radar transmitter and put it into working condition;

[0027] The excitation on / off signal control module is used to control the synchronizer to perform AND logic operations on the excitation on / off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal.

[0028] The modulation pulse generation module is used to convert the controlled modulator working pulse signal into a controlled modulation pulse signal and send it to the multi-beam klystron gate based on pulse shaping and amplitude amplification.

[0029] The radio frequency power amplifier module is used to send a controlled modulation pulse signal to the grid level of the multi-beam klystron when the cathode high voltage of the radar transmitter is normal and there is an excitation on signal, so that the multi-beam klystron can work normally to amplify the signal. If the cathode high voltage of the multi-beam klystron of the radar transmitter is normal but there is an excitation off signal, there is no controlled modulation pulse signal at the grid level of the multi-beam klystron, so that the electron beam of the cathode of the multi-beam klystron is in the cut-off state.

[0030] In a third aspect, embodiments of this application also provide a computer device, including: a memory and one or more processors;

[0031] The memory is used to store one or more programs;

[0032] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-described method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter.

[0033] In a fourth aspect, embodiments of this application also provide a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform a method for suppressing radio frequency leakage in a gate-controlled multi-beam klystron radar transmitter as described above.

[0034] In this embodiment, the radar transmitter is turned on and put into operation. The control synchronizer performs an AND logic operation on the excitation on / off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal. Based on pulse shaping and amplitude amplification, the modulation pulse generation module converts the controlled modulator working pulse signal into a controlled modulation pulse signal and sends it to the multi-beam klystron gate. If the cathode high voltage of the multi-beam klystron in the radar transmitter is normal and there is an excitation on signal, the controlled modulation pulse signal is sent to the multi-beam klystron gate, and the multi-beam klystron works normally to amplify the signal. If the cathode high voltage of the multi-beam klystron in the radar transmitter is normal but there is an excitation off signal, there is no controlled modulation pulse signal at the multi-beam klystron gate, so that the electron beam of the multi-beam klystron cathode is in the off state. By generating a modulation pulse signal controlled by the excitation on / off signal, this embodiment avoids the multi-beam klystron being in an intermittent conduction state when there is no RF excitation signal input. This can suppress the RF leakage of the grid-controlled multi-beam klystron radar transmitter in this state and eliminate the adverse effects on the safety of frequency-using equipment caused by RF leakage. Attached Figure Description

[0035] Figure 1 This is a flowchart illustrating a method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter, as provided in an embodiment of this application.

[0036] Figure 2 This is a timing diagram of the transmission operation of an existing grid-controlled multi-beam klystron radar provided in the embodiments of this application;

[0037] Figure 3 This is a diagram showing the measured output in-band noise of a certain type of grid-controlled multi-beam klystron radar transmitter, as provided in the embodiments of this application.

[0038] Figure 4 This is a diagram illustrating the modulation pulse generation process of a grid-controlled multi-beam klystron radar transmitter, which is part of a method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter according to an embodiment of this application.

[0039] Figure 5 This is a timing diagram of a grid-controlled multi-beam klystron radar transmitter, which is provided in an embodiment of this application for a method to suppress radio frequency leakage in such a transmitter.

[0040] Figure 6 This is a test diagram of the radio frequency leakage of an existing grid-controlled multi-beam klystron radar transmitter provided in the embodiments of this application;

[0041] Figure 7 This is a test diagram of the radio frequency leakage of a certain grid-controlled multi-beam klystron radar transmitter, which is a method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter provided in the embodiments of this application.

[0042] Figure 8 This is a schematic diagram of a device for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter, provided in an embodiment of this application.

[0043] Figure 9 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. It should also be noted that, for ease of description, only the parts relevant to this application are shown in the drawings, not all of them. Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0045] Currently, in existing grid-controlled multi-beam klystron pulse radar transmitter structures, the power radio frequency signal is generated and sent to the multi-beam klystron, while the modulation pulse is generated after the high voltage at the cathode of the multi-beam klystron in the radar transmitter is normalized. This working mechanism can be used... Figure 2 The timing diagram shown indicates that, therefore, in actual use, regardless of whether there is an RF excitation signal, the multi-beam klystron is in a state of intermittent conduction under the control of the modulation pulse after the cathode high voltage is normal.

[0046] Due to the influence of various factors such as cathode voltage, injection current, modulation pulse, filament, focusing system, and output cavity, multi-beam klystrons cannot operate in an ideal state. In the absence of an RF excitation signal, RF noise output exists, i.e., transmitter in-band noise exists, and its spectral characteristics are generally broadband noise. Figure 3As shown, the spectral width is the operating bandwidth of the multi-beam klystron. Cathode voltage ripple causes inconsistent initial velocities when electrons leave the cathode surface, leading to electron clustering within the cavity. Under conditions where there is no excitation signal source and the electron beam accelerating voltage (cathode high voltage) remains constant, a significant increase in the electron beam current will result in severe clustering in the drift tube, and the waveguide output power will increase rapidly. The electron beam experiences momentary defocusing at the instant of the control grid modulation pulse transition. Defocusing disrupts the electron beam, increasing RF output noise. Poor rectangularity of the grid modulation pulse waveform, with ringing, overshoot, or excessive pulse top fluctuations on its rising or falling edges, will all cause disturbances in the electron beam, potentially leading to self-oscillation in the klystron. Since electrons in the electron beam are typically obtained from a hot cathode at around 1000°C, and the filament is not uniformly heated, the electrons in the electron beam are not monoenergetic but possess a certain spectral width, resulting in noise at the output. The non-ideal state of the focusing system means that the focusing of the electron beam cannot be perfect; a small portion of electrons will always be captured by the slow-wave circuit, resulting in output noise. Current high-performance multi-beam klystrons generally use a dual-gap output cavity, which is more prone to parasitic oscillations than a single-gap output cavity.

[0047] In-band noise is an inherent characteristic of multi-beam klystrons (MBKs) and a common characteristic of microwave vacuum tubes. Transmitter in-band noise can only be suppressed by improving the MBK itself and its peripheral circuitry. Existing techniques, such as improving manufacturing and assembly processes and reducing MBK gain, can reduce output noise to some extent, but the improvement is very limited. Furthermore, by rationally designing the external power supply and circuitry of the MBK, RF noise output can also be reduced; for example, by improving high-voltage power supply ripple and increasing the rectangularity of the modulator output modulation pulse. However, these methods are difficult to completely eliminate its influence and are relatively difficult to implement.

[0048] In the military field, there are high requirements for electromagnetic spectrum control of frequency-using equipment such as radar and communication. The radio frequency leakage problem of multi-beam klystrons in the absence of radio frequency excitation signals can have an adverse impact on the safety of frequency-using equipment, such as electromagnetic interference or signal interception.

[0049] If the method of "disconnecting high voltage (cathode high voltage)" is used to suppress the radio frequency signal leakage of the multi-beam klystron, the "high voltage (cathode high voltage)" must be "re-applied" when normal air-to-air radiation signals are needed. Repeatedly raising and lowering the high voltage results in long waiting times, which is detrimental to the rapid response of the radar system and may also pose certain safety risks to the radar transmitter system circuitry itself.

[0050] Based on the above, this application establishes a method for suppressing radio frequency leakage in grid-controlled multi-beam klystron radar transmitters, which solves the problem that existing multi-beam klystron radar transmitters may have adverse effects on the safety of frequency-using equipment and may also have certain safety impacts on the radar transmitter system circuit itself.

[0051] The method for suppressing radio frequency leakage in a grating-controlled multi-beam klystron radar transmitter provided in the embodiments can be executed by a device for suppressing radio frequency leakage in a grating-controlled multi-beam klystron radar transmitter. This device can be implemented through software and / or hardware and integrated into a device for suppressing radio frequency leakage in a grating-controlled multi-beam klystron radar transmitter. The device for suppressing radio frequency leakage in a grating-controlled multi-beam klystron radar transmitter can be a computer or similar device.

[0052] Figure 1 A flowchart illustrating a method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter, provided as an embodiment of this application. (Reference) Figure 1 The method includes the following steps:

[0053] Step 110: Turn on the radar transmitter to put it into working condition.

[0054] Step 120: The control synchronizer performs an AND logic operation on the excitation on / off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal.

[0055] Specifically, a frequency excitation signal is generated by a frequency synthesizer and amplified to obtain a medium-power RF signal, which is then sent to a multi-beam klystron.

[0056] Optionally, after amplification, the signal is: an RF excitation signal is generated by a frequency synthesizer and sent to a solid-state amplifier; an excitation pass signal is sent to the solid-state amplifier to control the solid-state amplifier to convert the RF excitation signal into a medium-power RF signal and send it to the multi-beam klystron.

[0057] Step 130: Based on pulse shaping and amplitude amplification, the modulation pulse generation module converts the controlled modulator working pulse signal into a controlled modulation pulse signal and sends it to the multi-beam klystron gate.

[0058] For details, please refer to Figure 4 This diagram illustrates the modulation pulse generation process of a grid-controlled multi-beam klystron radar transmitter. Based on pulse shaping and amplitude amplification operations, the controlled modulator's working pulse signal is converted into a controlled pre-modulated pulse signal and sent to the modulator via a pre-modulator. Combined with the normal signal conditions of the multi-beam klystron cathode high voltage, the controlled pre-modulated pulse signal is converted into a controlled modulated pulse signal and sent to the multi-beam klystron via the modulator.

[0059] Among them, after receiving the controlled modulation pulse signal, the multi-beam klystron amplifies the medium-power radio frequency signal and converts it into a high-power radio frequency signal before outputting it.

[0060] Furthermore, after converting the controlled modulator's working pulse signal into a controlled modulated pulse signal and sending it to the multi-beam klystron based on pulse shaping and amplitude amplification operations to enable the multi-beam klystron to operate normally for signal amplification and output, the method further includes:

[0061] The high-power radio frequency signal generated by the multi-beam klystron is transmitted through a circulator; the high-frequency radio frequency signal of the circulator is further transmitted through a radar feed.

[0062] Step 140: If the cathode high voltage of the multi-beam klystron in the radar transmitter is normal and there is an excitation signal, the controlled modulation pulse signal is sent to the grid level of the multi-beam klystron, and the multi-beam klystron works normally to amplify the signal.

[0063] Step 150: If the high voltage of the cathode of the multi-beam klystron in the radar transmitter is normal but there is an excitation interruption signal, there is no controlled modulation pulse signal at the grid level of the multi-beam klystron, so that the electron beam of the cathode of the multi-beam klystron is in the cut-off state.

[0064] The above-described embodiments of this application optimize and improve the working mechanism of existing grid-controlled multi-beam klystron pulse radar transmitters, enabling the radar transmitter to generate modulation pulses controlled by excitation on / off signals. When the high voltage of the transmitter klystron cathode is normal, no modulation pulse is generated and sent to the gate of the multi-beam klystron; the electron beam of the multi-beam klystron cathode is in the off state and cannot self-excite to generate radio frequency noise output. However, when the excitation on signal arrives, a modulation pulse is generated and sent to the gate of the multi-beam klystron. The radio frequency input signal and the modulation pulse are synchronously sent to the multi-beam klystron, and the multi-beam klystron amplifies and outputs the radio frequency input signal normally. The working mechanism of the radar transmitter of this invention can be used... Figure 5 The timing diagram is used to represent this.

[0065] Compared with existing methods, the embodiments of this application can effectively suppress radio frequency leakage of the grid-controlled multi-beam klystron pulse radar transmitter in the absence of an excitation signal, with a signal suppression ratio greater than 38dB, thereby reducing the adverse effects of signal leakage on the radar system under high voltage on and excitation off states; Figure 6 This image shows the test results of radio frequency leakage in an existing grid-controlled multi-beam klystron radar transmitter. Figure 7 This is a test diagram showing the radio frequency leakage of a grid-controlled multi-beam klystron radar transmitter using an embodiment of this application.

[0066] Based on the above embodiments, please refer to Figure 8This application provides a device for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter. The device specifically includes: a transmitter activation module 401, an excitation on / off signal control module 402, a modulation pulse generation module 403, and a radio frequency power amplification module 404.

[0067] The transmitter activation module 401 is used to activate the radar transmitter and put it into operation. The excitation on / off signal control module 402 is used to control the synchronizer to perform AND logic operations on the excitation on / off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal. The modulation pulse generation module 403 is used to convert the controlled modulator working pulse signal into a controlled modulation pulse signal and send it to the multi-beam klystron gate based on pulse shaping and amplitude amplification. The radio frequency power amplification module 404 is used to send the controlled modulation pulse signal to the multi-beam klystron gate when the cathode high voltage of the multi-beam klystron of the radar transmitter is normal and there is an excitation on signal, so that the multi-beam klystron works normally to amplify the signal. If the cathode high voltage of the multi-beam klystron of the radar transmitter is normal but there is an excitation off signal, there is no controlled modulation pulse signal at the multi-beam klystron gate, so that the electron beam of the multi-beam klystron cathode is in the off state.

[0068] The above describes the process of turning on the radar transmitter to put it into operation; controlling the synchronizer to perform AND logic operations on the excitation on / off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal; based on pulse shaping and amplitude amplification, the modulation pulse generation module converts the controlled modulator working pulse signal into a controlled modulation pulse signal and sends it to the multi-beam klystron gate; if the cathode high voltage of the multi-beam klystron in the radar transmitter is normal and there is an excitation on signal, the controlled modulation pulse signal is sent to the multi-beam klystron gate, and the multi-beam klystron works normally to amplify the signal; if the cathode high voltage of the multi-beam klystron in the radar transmitter is normal but there is an excitation off signal, there is no controlled modulation pulse signal at the multi-beam klystron gate, so that the electron beam of the multi-beam klystron cathode is in the off state; this embodiment of the application, by generating a modulation pulse signal controlled by the excitation on / off signal, avoids the multi-beam klystron being in an intermittent conduction state when there is no RF excitation signal input, which can achieve the purpose of suppressing the RF leakage of the grid-controlled multi-beam klystron radar transmitter in this state, and eliminate the adverse effects on the safety of frequency-using equipment caused by RF leakage.

[0069] The device for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter provided in this application embodiment can be used to execute the method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter provided in the above embodiment, and has the corresponding functions and beneficial effects.

[0070] This application also provides a computer device that can integrate the radio frequency leakage suppression device for grid-controlled multi-beam klystron radar transmitters provided in this application. Figure 9 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. (Reference) Figure 9 The computer device includes an input device 53, an output device 54, a memory 52, and one or more processors 51. The memory 52 stores one or more programs. When the one or more programs are executed by the one or more processors 51, the one or more processors 51 implement the method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter as provided in the above embodiments. The input device 53, output device 54, memory 52, and processors 51 can be connected via a bus or other means. Figure 9 Taking the example of a connection between China and Israel via a bus.

[0071] The processor 51 executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the memory 52, thereby realizing the above-mentioned method for suppressing radio frequency leakage of grid-controlled multi-beam klystron radar transmitters.

[0072] The computer equipment provided above can be used to execute the method for suppressing radio frequency leakage of grid-controlled multi-beam klystron radar transmitters provided in the above embodiments, and has the corresponding functions and beneficial effects.

[0073] This application embodiment also provides a storage medium containing computer-executable instructions. When executed by a computer processor, the computer-executable instructions are used to perform a method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter. The method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter includes: turning on the radar transmitter to put it into a working state; controlling the synchronizer to perform an AND logic operation on the excitation on / off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal; based on pulse shaping and amplitude amplification, the modulation pulse generation module converts the controlled modulator working pulse signal into a controlled modulation pulse signal and sends it to the grid level of the multi-beam klystron; if the cathode high voltage of the multi-beam klystron in the radar transmitter is normal and there is an excitation on signal, the controlled modulation pulse signal is sent to the grid level of the multi-beam klystron, and the multi-beam klystron works normally to amplify the signal; if the cathode high voltage of the multi-beam klystron in the radar transmitter is normal but there is an excitation off signal, there is no controlled modulation pulse signal at the grid level of the multi-beam klystron, so that the electron beam of the cathode of the multi-beam klystron is in a cutoff state.

[0074] Storage medium – any type of memory device or storage device. The term “storage medium” is intended to include: mounting media, such as CD-ROM, floppy disk, or magnetic tape devices; computer device memory or random access memory, such as DRAM, DDRRAM, SRAM, EDORAM, Rambus RAM, etc.; non-volatile memory, such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. Storage medium may also include other types of memory or combinations thereof. Furthermore, storage medium may reside in a first computer device in which a program is executed, or it may reside in a different second computer device connected to the first computer device via a network (such as the Internet). The second computer device may provide program instructions to the first computer for execution. The term “storage medium” may include two or more storage media that may reside in different locations (e.g., in different computer devices connected via a network). Storage medium may store program instructions (e.g., specifically implemented as a computer program) executable by one or more processors.

[0075] Of course, the computer-executable instructions provided in the embodiments of this application are not limited to the method for suppressing radio frequency leakage of a grid-controlled multi-beam klystron radar transmitter as described above, but can also perform related operations in the method for suppressing radio frequency leakage of a grid-controlled multi-beam klystron radar transmitter provided in any embodiment of this application.

[0076] The device, storage medium, and computer equipment for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter provided in the above embodiments can execute the method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter provided in any embodiment of this application. For technical details not described in detail in the above embodiments, please refer to the method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter provided in any embodiment of this application.

[0077] The above description is merely a preferred embodiment and the technical principles employed in this application. This application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions that can be made by those skilled in the art will not depart from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the claims.

Claims

1. A method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter, characterized in that, The method includes the following steps: Turn on the radar transmitter to put it into working condition; The control synchronizer performs an AND logic operation on the excitation on / off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal; Based on pulse shaping and amplitude amplification, the modulation pulse generation module converts the controlled modulator working pulse signal into a controlled modulation pulse signal and sends it to the multi-beam klystron gate. If the cathode high voltage of the multi-beam klystron in the radar transmitter is normal and there is an excitation signal, the controlled modulation pulse signal is sent to the grid of the multi-beam klystron, and the multi-beam klystron works normally to amplify the signal. If the high voltage of the cathode of the multi-beam klystron in the radar transmitter is normal but there is an excitation interruption signal, there will be no controlled modulation pulse signal at the grid level of the multi-beam klystron, so that the electron beam of the cathode of the multi-beam klystron will be in the cut-off state.

2. The method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter according to claim 1, characterized in that, After activating the radar transmitter to put it into working condition, the process also includes: The frequency synthesizer generates an RF excitation signal, which is then amplified to obtain a medium-power RF signal and sent to a multi-beam klystron.

3. The method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter according to claim 2, characterized in that, The process of generating a radio frequency excitation signal through a frequency synthesizer, amplifying it, obtaining a medium-power radio frequency signal, and sending it to a multi-beam klystron includes: The frequency synthesizer generates an RF excitation signal and sends it to a solid-state amplifier. Send an excitation signal to the solid-state amplifier to control the solid-state amplifier to convert the RF excitation signal into a medium-power RF signal and send it to the multi-beam klystron.

4. The method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter according to claim 3, characterized in that, To enable the multi-injection speed controller to function properly and amplify the signal output, including: This allows the multi-beam klystron to receive a controlled modulation pulse signal, amplify the medium-power radio frequency signal, convert it into a high-power radio frequency signal, and then output it.

5. The method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter according to claim 1, characterized in that, The modulated pulse generation module, based on pulse shaping and amplitude amplification, converts the controlled modulator's operating pulse signal into a controlled modulated pulse signal, including: Based on pulse shaping and amplitude amplification operations, the controlled modulator working pulse signal is converted into a controlled pre-modulated pulse signal by the pre-modulator and sent to the modulator. Combined with the normal signal conditions of the high voltage at the cathode of the multi-beam klystron, the controlled pre-modulated pulse signal is converted into a controlled modulated pulse signal by the modulator and sent to the multi-beam klystron.

6. The method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter according to claim 4, characterized in that, The process of converting the controlled modulator's working pulse signal into a controlled modulated pulse signal and sending it to the multi-beam klystron (MBK) based on pulse shaping and amplitude amplification operations, so that the MBK can operate normally for signal amplification and output, further includes: The high-power radio frequency signals generated by the multi-beam klystron are isolated and transmitted using a circulator.

7. The method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter according to claim 6, characterized in that, After transmitting the high-power radio frequency signal generated by the multi-beam klystron through a circulator, the process also includes: The high-frequency radio frequency signal of the circulator is further transmitted through a radar feed.

8. A device for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter, characterized in that, include: Transmitter activation module, used to activate the radar transmitter and put it into working condition; The excitation on / off signal control module is used to control the synchronizer to perform AND logic operations on the excitation on / off signal and the modulator working pulse signal to generate a controlled modulator working pulse signal. The modulation pulse generation module is used to convert the controlled modulator working pulse signal into a controlled modulation pulse signal and send it to the multi-beam klystron gate based on pulse shaping and amplitude amplification. The radio frequency power amplifier module is used to send a controlled modulation pulse signal to the grid level of the multi-beam klystron when the cathode high voltage of the radar transmitter is normal and there is an excitation on signal, so that the multi-beam klystron can work normally to amplify the signal. If the cathode high voltage of the multi-beam klystron of the radar transmitter is normal but there is an excitation off signal, there is no controlled modulation pulse signal at the grid level of the multi-beam klystron, so that the electron beam of the cathode of the multi-beam klystron is in the cut-off state.

9. A computer device, characterized in that, include: Memory and one or more processors; The memory is used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement a method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter as described in any one of claims 1-7.

10. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform a method for suppressing radio frequency leakage in a grid-controlled multi-beam klystron radar transmitter as described in any one of claims 1-7.

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