A system and method for synthesizing and injecting high power electromagnetic pulses

Abstract

The application discloses a strong electromagnetic pulse synthesis and injection system and a synthesis and injection method, relates to the technical field of electromagnetic pulse application, and comprises a reverberation cavity module, a signal synthesis and injection module, a time reversal processing module and a control module; the control module coordinates the work of each module, the reverberation cavity module is provided with multiple input and output ports and is internally provided with a tunable multi-path device; the signal synthesis and injection module generates and synthesizes a strong electromagnetic pulse signal and then injects the strong electromagnetic pulse signal; the time reversal processing module collects signal characteristics to generate a reversed signal to realize focusing; and the control module realizes closed-loop regulation and control in combination with a feedback module. The method of the application realizes accurate regulation and control of the whole process through parameter configuration, signal synthesis and injection, multi-path regulation and control, time reversal focusing, signal output and closed-loop regulation and the like based on the above system. The application improves the processing efficiency, control accuracy and energy utilization rate of the strong electromagnetic pulse signal and can be widely applied to scenes such as electromagnetic environment simulation, electromagnetic compatibility testing, directional signal enhancement transmission and the like.

Description

Technical Field

[0001] This application belongs to the field of electromagnetic pulse application technology, and specifically relates to a strong electromagnetic pulse synthesis and injection system and synthesis and injection method. Background Technology

[0002] With the deep application of electromagnetic technology in fields such as communication, electronic equipment testing, defense electronics, and electromagnetic compatibility testing, industrial and scientific research scenarios have put forward higher application requirements for the controllability, processing efficiency, and energy focusing of strong electromagnetic pulse signals. There is an urgent need to realize the collaborative processing of multiple electromagnetic pulse signals, dynamic control of propagation paths, and precise focusing of signal energy to designated areas in order to meet the practical application needs such as multi-source electromagnetic environment simulation and directional signal enhancement transmission.

[0003] Currently, most existing high-power electromagnetic pulse (HMP) processing devices are based on traditional reverberation cavity architectures. This type of technology has significant technical shortcomings and cannot meet the high-quality requirements of practical applications: First, traditional reverberation cavities generally adopt a single-input, single-output structure, capable of processing only a single electromagnetic pulse signal. They cannot achieve independent input and coordinated control of multiple signals with different parameters, resulting in low signal processing efficiency and difficulty in simulating complex multi-source electromagnetic environments. Second, the signal propagation path inside the reverberation cavity is fixed, and its multipath characteristics are not adjustable, making it impossible to precisely control the signal propagation time and phase according to the application scenario, leading to poor system versatility and flexibility. Third, the lack of effective time reversal and signal focusing mechanisms causes energy dispersion during signal propagation within the cavity, making it impossible to accurately focus energy onto a designated port or area. This not only results in low signal utilization but also easily generates mutual interference between signals, affecting the quality of the output signal. Fourth, the lack of efficient collaborative control logic and closed-loop feedback adjustment mechanisms between functional modules, insufficient impedance matching design for signal input and output, and the resulting signal reflection loss make it difficult to guarantee the stability and accuracy of the output signal. Summary of the Invention

[0004] The purpose of this application is to provide a strong electromagnetic pulse synthesis and injection system and method. This addresses the technical problems mentioned in the background section regarding insufficient multi-channel signal processing capabilities, unadjustable multipath characteristics, and inability to accurately focus signal energy in existing technologies, thereby improving the control accuracy, processing efficiency, and energy utilization of strong electromagnetic pulse signals.

[0005] To achieve the above objectives, this application adopts the following technical solution: In the first aspect, a strong electromagnetic pulse synthesis and injection system is provided, including a reverberation cavity module, a signal synthesis and injection module, a time reversal processing module, and a control module; The control module is connected to the reverberation cavity module, the signal synthesis and injection module, and the time reversal processing module respectively. The reverberation cavity module is used to provide space for the propagation and superposition of electromagnetic pulse signals, receive externally injected electromagnetic pulse signals and inversion signals, and output processed electromagnetic pulse signals. The signal synthesis and injection module is used to generate multiple initial electromagnetic pulse signals, which are amplified and synthesized to form a strong electromagnetic pulse signal, and then the strong electromagnetic pulse signal is injected into the reverberation cavity module. The time-reversal processing module is used to acquire signal characteristics inside or at the output end of the reverberation cavity module, generate a reversal signal based on the time-reversal principle, and inject the reversal signal into the reverberation cavity module to achieve signal focusing. The control module is used to receive user requests and generate control commands, coordinate the working status of each module, and realize signal input and output control, reverberation cavity multipath characteristic adjustment, time reversal focusing control, and closed-loop feedback adjustment.

[0006] In one possible implementation, the reverberation cavity module is provided with multiple independent input ports and multiple output ports; The input ports are evenly distributed on the sidewalls, top, or bottom of the reverberation cavity, and the output ports are located at positions that are not directly coupled to the input ports. Each of the input ports is equipped with a standard signal interface and impedance matching circuit, and each of the output ports is equipped with a signal conditioning unit and a filtering unit.

[0007] In one possible implementation, the reverberation cavity module is made of a highly conductive metal material, and the inner wall of the cavity is polished or treated with a special coating. The number of input ports is 2-8, and the standard signal interface is an SMA interface or an N-type interface.

[0008] In one possible implementation, the signal conditioning unit is used to regulate the amplitude and phase of the output signal, and the filtering unit is a low-pass filter module used to filter out noise interference in the output signal.

[0009] In one possible implementation, the reverberation cavity module incorporates a tunable multipath device, which includes one or more of a tunable reflective surface, cavity size adjustment, and medium adjustment. The control module incorporates a multipath characteristic control algorithm to drive the tunable multipath device to adjust the signal propagation path within the cavity.

[0010] In one possible implementation, the tunable reflective surface consists of a metal reflective panel and a motor drive mechanism, used to adjust the reflection angle and position of the signal. The cavity size is adjustable with a telescopic structure, equipped with telescopic components and a locking device, used to change the internal volume and geometry of the reverberation cavity; The dielectric adjustment includes dielectric blocks with different dielectric constants and a robotic arm, used to control the position and number of dielectric blocks to change the electromagnetic properties of local areas within the cavity.

[0011] In one possible implementation, the time inversion processing module includes a signal acquisition unit, an inversion calculation unit, and a signal output unit; The signal acquisition unit is used to acquire the waveform, phase, and amplitude characteristics of the signal; The inversion calculation unit uses an inverse filtering algorithm or a correlation matching algorithm to process the acquired signal and generate an inversion signal that is time-reverse of the original signal. The signal output unit is used to output the inversion signal to a designated input port of the reverberation cavity module.

[0012] In one possible implementation, the signal synthesis and injection module consists of an electromagnetic pulse signal source, a high-power amplifier, and a power synthesizer; The electromagnetic pulse signal source is used to generate multiple initial electromagnetic pulse signals with different parameters; The high-power amplifier is used to amplify the power of the initial electromagnetic pulse signal; The power combiner is used to efficiently combine multiple amplified signals into a strong electromagnetic pulse signal.

[0013] In one possible implementation, the control module uses an embedded processor as the control core, is equipped with a human-machine interface, and is also connected to a feedback module. The feedback module is used to collect the signal parameters at the output end of the reverberation cavity module in real time and transmit them to the control module. The control module dynamically adjusts the operating parameters of each module based on the feedback signal parameters using a PID algorithm.

[0014] Secondly, a method for synthesizing and injecting strong electromagnetic pulses is provided, based on the aforementioned strong electromagnetic pulse synthesis and injection system, including the following steps: S1, the control module receives the signal parameters, focusing target and output requirements input by the user, generates the corresponding control commands and sends them to each module; S2, the signal synthesis and injection module generates multiple initial electromagnetic pulse signals according to the control command, which are then amplified and synthesized to form a strong electromagnetic pulse signal, which is injected into the cavity through the designated input port of the reverberation cavity module; S3, the control module drives the tunable multipath device of the reverberation cavity module to dynamically adjust the signal propagation path in the cavity and construct a preset multipath propagation environment; S4, the time-reversal processing module collects signal characteristics from the reverberation cavity module or a designated output port, processes the collected signal based on the time-reversal principle to generate a reversal signal, and injects the reversal signal into the cavity through the corresponding input port of the reverberation cavity module; S5, the strong electromagnetic pulse signal and the inversion signal are propagated through multiple paths and superimposed in the reverberation cavity module, and then output from the output port. After signal conditioning and filtering, the target signal is obtained. S6, the control module collects the parameters of the target signal in real time through the feedback module, compares them with the preset values, and dynamically adjusts the working parameters of each module to achieve closed-loop control.

[0015] Compared with the prior art, this application has the following beneficial effects: This application, through the design of a reverberation cavity module with multiple input and output ports, supports the independent input and coordinated control of multiple electromagnetic pulse signals with different parameters, breaking through the limitations of the traditional single-input single-output structure, greatly improving signal processing efficiency, accurately simulating complex multi-source electromagnetic environments, and adapting to diverse scenario requirements such as electromagnetic compatibility testing.

[0016] This application achieves dynamic control of signal propagation path, propagation time, and phase within the cavity by using a reverberation cavity module with a built-in tunable multipath device and a multipath characteristic control algorithm of the control module. This solves the technical defects of fixed multipath characteristics in traditional reverberation cavities and significantly improves the versatility and flexibility of the system.

[0017] In one possible implementation, by integrating a time-reversal processing module, an inversion signal is generated based on inverse filtering or correlation matching algorithms. This enables the strong electromagnetic pulse signal and the inversion signal to achieve phase synchronization and energy superposition at the focusing target, thereby achieving precise focusing of signal energy to a specified port / region, improving signal energy utilization, and effectively reducing invalid radiation and mutual interference between signals.

[0018] In one possible implementation, a closed-loop design of the control module and feedback module is used to collect output signal parameters in real time based on the PID algorithm and dynamically adjust the working state of each module. Combined with the impedance matching circuit design of the input port, signal reflection loss is reduced, ensuring the stability and accuracy of the output signal, and achieving high-precision control of strong electromagnetic pulse signals.

[0019] In one possible implementation, each functional module is modularly designed with strong signal connection adaptability. The standard signal interface can achieve seamless connection with external devices. The system is easy to integrate and expand, and can flexibly adapt to the personalized needs of different application scenarios such as electromagnetic environment simulation and signal enhancement transmission.

[0020] In one possible implementation, by using a high-conductivity metal material for the reverberation cavity module and polishing / coating the inner wall, the signal propagation loss inside the cavity can be further reduced, thereby improving the efficiency of signal transmission and superposition.

[0021] In one possible implementation, by combining the tunable reflective surface, cavity size adjustment, and medium adjustment of the tunable multipath device, the signal propagation characteristics can be adjusted from multiple dimensions such as reflection path, cavity volume, and local electromagnetic characteristics, thereby achieving refined and diversified control of multipath characteristics.

[0022] In one possible implementation, by working together with the electromagnetic pulse signal source, high-power amplifier, and power synthesizer of the signal synthesis injection module, a high-intensity, parameter-adjustable strong electromagnetic pulse signal can be efficiently generated to meet the signal power requirements of scenarios such as high-energy electromagnetic environment simulation.

[0023] In one possible implementation, the embedded processor of the control module and the human-computer interaction interface design enable the visualization of user needs and convenient adjustment of system parameters, thereby reducing the operating threshold of the system and improving the convenience of practical applications.

[0024] A method for synthesizing and injecting strong electromagnetic pulses is proposed. Based on the collaborative working logic design of various modules of the system, the steps are closely connected and the logic is clear. It realizes precise control of the entire process of strong electromagnetic pulse signal from generation, synthesis, injection to focusing and output. The operation process is standardized, highly repeatable, and easy for those skilled in the art to implement and apply.

[0025] The method's workflow design, which involves configuring parameters before executing module actions, allows for flexible setting of signal parameters and focusing targets based on different user scenario requirements. This enables customized synthesis and injection of strong electromagnetic pulse signals, solving the problem of poor adaptability in traditional methods and improving the method's practicality and flexibility.

[0026] The method involves the step-by-step execution and coordinated operation of multipath path control and time-inversion focusing. First, a preset multipath propagation environment is constructed before the inversion signal is injected, ensuring that the inversion signal and the original strong electromagnetic pulse signal are accurately superimposed at the focusing target, which greatly improves the accuracy and stability of signal focusing and effectively improves the signal energy utilization rate.

[0027] The method introduces a closed-loop feedback adjustment step, which collects parameters in real time after signal output and dynamically adjusts the module's working state, forming a complete link of generation, processing, output, feedback, and adjustment. This can promptly correct deviations in the signal transmission and processing process, ensuring that the parameters of the output target signal are highly consistent with the preset requirements and improving the accuracy of signal processing.

[0028] The method of this application is deeply adapted to the strong electromagnetic pulse synthesis and injection system, giving full play to the functional advantages of each module of the system, and transforming the innovation of hardware structure into actual signal processing effect. It achieves the technical goals of multi-channel signal processing, adjustable multipath characteristics, and precise signal focusing, and can be widely used in electromagnetic compatibility testing, directional signal transmission and other scenarios. It has a wide range of applications and strong adaptability. Attached Figure Description

[0029] Figure 1 This application provides an overall structural schematic diagram of a strong electromagnetic pulse synthesis and injection system; Figure 2 This application provides a schematic diagram of the structure of a reverberation cavity module in a strong electromagnetic pulse synthesis and injection system. Figure 3 This is a flowchart illustrating a method for synthesizing and injecting strong electromagnetic pulses, as provided in this application. Detailed Implementation

[0030] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Example 1: like Figure 1 and Figure 2 As shown in the figure, this application provides a strong electromagnetic pulse synthesis and injection system, which includes a reverberation cavity module, a signal synthesis and injection module, a time reversal processing module, and a control module. The control module establishes bidirectional signal connections with the reverberation cavity module, the signal synthesis and injection module, and the time reversal processing module to realize the coordinated control and data interaction of each module.

[0037] The reverberation cavity module, serving as the core carrier for electromagnetic pulse signal propagation and superposition, is made of brass (a high-conductivity metal). The basic dimensions of the cavity are designed to be 1m × 1m × 1m, and the inner wall is polished to reduce signal propagation loss. The module has four independent input ports and four output ports. The input ports are evenly distributed on the front wall of the reverberation cavity, while the output ports are correspondingly located on the rear wall (not directly coupled to the input ports), with a 30cm spacing between the ports to avoid direct signal coupling. Each input port is equipped with an SMA standard signal interface and a 50Ω impedance matching circuit, enabling seamless connection with external signal sources and reducing signal reflection loss.

[0038] Each output port is equipped with a signal conditioning unit and a low-pass filter unit in sequence. The signal conditioning unit adopts a programmable attenuator (0-30dB) + low noise amplifier (gain 20dB) to achieve precise control of the amplitude and phase of the output signal. The cutoff frequency of the low-pass filter unit is set to 1.2GHz to effectively filter out noise interference in the output signal.

[0039] The reverberation cavity module incorporates a tunable multipath device, which integrates a tunable reflector, cavity size adjustment components, and medium adjustment components. The adjustable reflective surface consists of two 20cm×20cm metal reflective panels, driven by a 28BYJ-48 stepper motor, which can achieve 0-90° angle adjustment to change the signal reflection path and the number of reflections. The cavity size adjustment component has a sliding guide rail and an MG996R servo motor at the top of the cavity to control the lifting and lowering of the top panel, so as to adjust the cavity height within the range of 0.8-1.2m. A sealing rubber strip is installed at the guide rail to prevent signal leakage. The dielectric adjustment assembly consists of two polytetrafluoroethylene dielectric blocks (dielectric constant 2.1, size 15cm×15cm×5cm). The movement of the dielectric blocks is controlled by a servo motor-driven robotic arm, which can cover the central area of ​​the cavity and change the local electromagnetic properties.

[0040] The signal synthesis and injection module consists of an electromagnetic pulse signal source, a high-power amplifier, and a power synthesizer. The electromagnetic pulse signal source uses four DG1022Z function signal generators (1MHz-200MHz) to generate multiple initial electromagnetic pulse signals with different frequencies, amplitudes, and phases. The high-power amplifier uses a ZHL-10W-43 amplifier (30dB gain) to amplify the initial signals. The power synthesizer uses a PSC-4-1 four-channel power synthesizer (0.5dB insertion loss) to efficiently synthesize the multiple amplified signals into a strong electromagnetic pulse signal and inject it into the designated input port of the reverberation cavity module.

[0041] The time-reversal processing module is based on the Xilinx XC7K325T FPGA chip and integrates a signal acquisition unit, a reversal calculation unit, and a signal output unit. The signal acquisition unit uses an AD9288 high-speed ADC (sampling rate 100MSPS) to acquire the signal waveform, phase, and amplitude characteristics in the reverberation cavity module or at the output port in real time. The inversion calculation unit implements an inverse filtering algorithm based on FPGA, performs Fourier transform, frequency domain inversion, and inverse Fourier transform processing on the acquired signal to generate an inversion signal that is time-reverse of the original signal; the signal output unit uses an AD9767 DAC (125MSPS conversion rate) to output the inversion signal to the designated input port of the reverberation cavity module to achieve signal focusing.

[0042] The control module uses an STM32F407ARM processor as its control core, is equipped with a 3.5-inch touchscreen as its human-machine interface, and has an external feedback module. The control module establishes communication with each module through a serial port. It can receive signal parameters, focusing targets and other requirements input by the user through the human-machine interface, generate and issue control commands, and realize functions such as input port selection, tunable multipath device parameter adjustment and time inversion processing module working status control. The feedback module collects the signal amplitude and phase parameters of the output port in real time and transmits them to the control module. The control module, based on a PID algorithm, compares the collected parameters with preset values ​​and dynamically adjusts parameters such as the high-power amplifier gain and the tunable reflector angle to achieve closed-loop feedback regulation, ensuring the output signal meets preset requirements. The system is equipped with a MeanWell RS-150-12 / 24 switching power supply, providing stable 12V and 24V DC voltages to each module. The power supply output is equipped with filter capacitors and fuses to ensure power supply stability.

[0043] Example 2: Based on the strong electromagnetic pulse synthesis and injection system of Example 1, combined with Figure 3 This application provides a method for synthesizing and injecting a strong electromagnetic pulse, specifically including the following steps: S1, Parameter Configuration and Command Generation: The user inputs signal parameters (frequency 100MHz, amplitude 5V) through the human-machine interface of the control module, selects 3 input ports, and sets output port 2 as the focus target. After receiving the requirements, the control module generates corresponding control commands and sends them to each functional module. S2, Signal Synthesis and Injection: Of the four electromagnetic pulse signal sources in the signal synthesis and injection module, three generate initial electromagnetic pulse signals according to control commands. After being amplified by a high-power amplifier and synthesized by a four-channel power synthesizer, a strong electromagnetic pulse signal is formed and injected into the cavity through the three input ports specified by the reverberation cavity module. S3, Multipath Path Control: The control module drives the tunable multipath device, controls the tunable reflector to adjust to 45°, maintains the cavity height at 1m, and moves the medium block to the center of the cavity with the robotic arm to build a preset multipath propagation environment and adjust the signal propagation path in the cavity; S4, Time Reversal Focusing Processing: The signal acquisition unit of the time reversal processing module acquires the signal characteristics of output port 2 through ADC and stores them in the FPGA buffer. The reversal calculation unit runs the inverse filtering algorithm to process the acquired signal and generate the reversal signal. The signal output unit injects the reversal signal into the cavity through the remaining 1 input port of the reverberation cavity module through DAC. S5, Signal superposition and output: The strong electromagnetic pulse signal injected into the cavity and the inverted signal are multipath propagated, phase synchronized and superimposed by energy, and then received by output port 2. After attenuation and amplification by the signal conditioning unit and clutter filtering by the filtering unit, the target signal is output. S6, Closed-loop feedback regulation: The feedback module collects the target signal parameters of output port 2 in real time and transmits them to the control module. If the signal amplitude does not reach the preset value of 5V, the control module dynamically adjusts the gain of the high-power amplifier and the angle of the tunable reflector based on the PID algorithm until the amplitude, phase and other parameters of the output signal meet the user's preset requirements, thus completing a strong electromagnetic pulse synthesis and injection process.

[0044] Example 3: Application Scenarios of the System and Method The strong electromagnetic pulse synthesis and injection system and synthesis and injection method of this application can be widely used in electromagnetic compatibility testing, multi-source electromagnetic environment simulation, directional signal enhancement transmission and other scenarios. Electromagnetic compatibility testing scenario: By injecting multiple electromagnetic pulse signals with different parameters through multiple input ports, a complex multi-source electromagnetic interference environment is simulated. With the help of a tunable multipath device to adjust the signal propagation characteristics, the electromagnetic interference resistance of electronic equipment can be fully verified. Directional signal enhancement transmission scenario: The time reversal processing module accurately focuses the signal energy to the designated output port / area, improving the signal strength and signal-to-noise ratio of directional transmission and reducing energy loss during signal transmission; High-energy electromagnetic environment simulation scenario: By generating high-intensity electromagnetic pulse signals through the signal synthesis and injection module, and combining the signal superposition effect of the reverberation cavity module, a high-energy electromagnetic radiation environment can be simulated, providing environmental support for equipment testing in fields such as defense electronics and aerospace.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A strong electromagnetic pulse synthesis and injection system, characterized in that, It includes a reverberation cavity module, a signal synthesis and injection module, a time reversal processing module, and a control module; The control module is connected to the reverberation cavity module, the signal synthesis and injection module, and the time reversal processing module respectively. The reverberation cavity module is used to provide space for the propagation and superposition of electromagnetic pulse signals, receive externally injected electromagnetic pulse signals and inversion signals, and output processed electromagnetic pulse signals. The signal synthesis and injection module is used to generate multiple initial electromagnetic pulse signals, which are amplified and synthesized to form a strong electromagnetic pulse signal, and then the strong electromagnetic pulse signal is injected into the reverberation cavity module. The time-reversal processing module is used to acquire signal characteristics inside or at the output end of the reverberation cavity module, generate a reversal signal based on the time-reversal principle, and inject the reversal signal into the reverberation cavity module to achieve signal focusing. The control module is used to receive user requests and generate control commands, coordinate the working status of each module, and realize signal input and output control, reverberation cavity multipath characteristic adjustment, time reversal focusing control, and closed-loop feedback adjustment.

2. The high-intensity electromagnetic pulse synthesis and injection system according to claim 1, characterized in that, The reverberation cavity module is equipped with multiple independent input ports and multiple output ports; The input ports are evenly distributed on the sidewalls, top, or bottom of the reverberation cavity, and the output ports are located at positions that are not directly coupled to the input ports. Each of the input ports is equipped with a standard signal interface and impedance matching circuit, and each of the output ports is equipped with a signal conditioning unit and a filtering unit.

3. The high-intensity electromagnetic pulse synthesis and injection system according to claim 2, characterized in that, The reverberation cavity module is made of a high-conductivity metal material, and the inner wall of the cavity is polished or treated with a special coating. The number of input ports is 2-8, the standard signal interface is an SMA interface or an N-type interface, and the impedance matching circuit is a 50Ω matching circuit.

4. The high-intensity electromagnetic pulse synthesis and injection system according to claim 2, characterized in that, The signal conditioning unit is used to regulate the amplitude and phase of the output signal, and the filtering unit is a low-pass filter module used to filter out noise interference in the output signal.

5. The high-intensity electromagnetic pulse synthesis and injection system according to claim 1, characterized in that, The reverberation cavity module has a built-in tunable multipath device, which includes one or more of the following: tunable reflective surface, cavity size adjustment, and medium adjustment. The control module incorporates a multipath characteristic control algorithm to drive the tunable multipath device to adjust the signal propagation path within the cavity.

6. The high-intensity electromagnetic pulse synthesis and injection system according to claim 5, characterized in that, The tunable reflective surface consists of a metal reflective panel and a motor drive mechanism, and is used to adjust the reflection angle and position of the signal. The cavity size is adjustable with a telescopic structure, equipped with telescopic components and a locking device, used to change the internal volume and geometry of the reverberation cavity; The dielectric adjustment includes dielectric blocks with different dielectric constants and a robotic arm, used to control the position and number of dielectric blocks to change the electromagnetic properties of local areas within the cavity.

7. The high-intensity electromagnetic pulse synthesis and injection system according to claim 1, characterized in that, The time-reversal processing module includes a signal acquisition unit, a reversal calculation unit, and a signal output unit; The signal acquisition unit is used to acquire the waveform, phase, and amplitude characteristics of the signal; The inversion calculation unit uses an inverse filtering algorithm or a correlation matching algorithm to process the acquired signal and generate an inversion signal that is time-reverse of the original signal. The signal output unit is used to output the inversion signal to a designated input port of the reverberation cavity module.

8. The high-intensity electromagnetic pulse synthesis and injection system according to claim 1, characterized in that, The signal synthesis and injection module consists of an electromagnetic pulse signal source, a high-power amplifier, and a power synthesizer. The electromagnetic pulse signal source is used to generate multiple initial electromagnetic pulse signals with different parameters; The high-power amplifier is used to amplify the power of the initial electromagnetic pulse signal; The power combiner is used to efficiently combine multiple amplified signals into a strong electromagnetic pulse signal.

9. The high-intensity electromagnetic pulse synthesis and injection system according to claim 1, characterized in that, The control module uses an embedded processor as the control core and is equipped with a human-machine interface. The control module is also connected to a feedback module. The feedback module is used to collect the signal parameters at the output end of the reverberation cavity module in real time and transmit them to the control module. The control module dynamically adjusts the operating parameters of each module based on the feedback signal parameters using a PID algorithm.

10. A method for synthesizing and injecting a strong electromagnetic pulse, implemented based on the strong electromagnetic pulse synthesis and injection system of claim 1, characterized in that, Includes the following steps: S1, the control module receives the signal parameters, focusing target and output requirements input by the user, generates the corresponding control commands and sends them to each module; S2, the signal synthesis and injection module generates multiple initial electromagnetic pulse signals according to the control command, which are then amplified and synthesized to form a strong electromagnetic pulse signal, which is injected into the cavity through the designated input port of the reverberation cavity module; S3, the control module drives the tunable multipath device of the reverberation cavity module to dynamically adjust the signal propagation path in the cavity and construct a preset multipath propagation environment; S4, the time-reversal processing module collects signal characteristics from the reverberation cavity module or a designated output port, processes the collected signal based on the time-reversal principle to generate a reversal signal, and injects the reversal signal into the cavity through the corresponding input port of the reverberation cavity module; S5, the strong electromagnetic pulse signal and the inversion signal are propagated through multiple paths and superimposed in the reverberation cavity module, and then output from the output port. After signal conditioning and filtering, the target signal is obtained. S6, the control module collects the parameters of the target signal in real time through the feedback module, compares them with the preset values, and dynamically adjusts the working parameters of each module to achieve closed-loop control.

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