Intelligent electromagnetic protection method and protection system based on reconfigurable antenna

Abstract

The invention discloses an intelligent electromagnetic protection method and protection system based on a reconfigurable antenna, and relates to the technical field of electromagnetic defens.The method comprises the steps that firstly, the reconfigurable antenna is arranged, the frequency and the polarization mode of the reconfigurable antenna can be changed, and electromagnetic signal receiving comprises the step of receiving electromagnetic signals under the current working frequency and polarization mode of the reconfigurable antenna; receiving external electromagnetic signals and carrying out electromagnetic environment perception analysis, including analyzing current electromagnetic environment characteristics according to the electromagnetic signals received under different working frequencies and polarization modes, judging whether high-power microwave attack exists or not according to the received electromagnetic environment characteristics, optimizing the working mode of the antenna, and judging whether the high-power microwave attack exists or not according to the received electromagnetic environment characteristics. Comprising the steps of performing intelligent optimization of an antenna working mode and antenna reconstruction control according to an electromagnetic environment perception analysis result, and driving an antenna reconstruction control circuit and setting an antenna working state according to the selected frequency and polarization mode. By applying the scheme, the influence of electromagnetic attack on electronic systems such as radar and communication equipment can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic defense technology, and in particular to an electromagnetic protection method and system thereof, in particular to an intelligent electromagnetic protection method and protection system based on a reconfigurable antenna. Background Art

[0002] In response to high-power microwave weapon attacks, electronic information equipment is mainly protected by passive measures such as shielding and protection. Electronic systems such as radar and communication equipment need to detect targets and receive electromagnetic information through antenna systems, and cannot use effective electromagnetic shielding to protect against high-power microwave weapons.

[0003] The antenna system is the only way for radar, communication and other frequency-using electronic systems to detect targets and receive remote control electromagnetic information, and it also provides an opportunity for new high-power microwave weapons to attack. High-power microwave weapons use the strong electromagnetic pulses they generate to disrupt, damage or even destroy electronic equipment. The extremely high electromagnetic energy they generate can enter the electronic system through the antenna "front door" coupling and the aperture "back door" coupling, thereby interfering with and damaging the electronic system. Its main damaging effects are: (1) high-voltage breakdown. Electromagnetic energy can be converted into high current after being received by the equipment. It may also be converted into high voltage at high resistance, which will cause electrical breakdown between contacts, components or circuits, causing damage to the device or instantaneous failure; (2) device burning, including junction ablation of semiconductor devices, melting of metal wires, etc., which will cause permanent damage; (3) microwave heating. Microwaves can heat up metals and water-containing media, causing the device (component) to malfunction; (4) surge shock. Even if microwave pulses cannot be directly radiated to the electronic system due to metal shielding, they can induce large pulse currents in the metal shielding shell, flowing on the shell like a surge. Gaps, holes, exposed leads, etc. introduce a small part of this surge current into the system inside the shell, which is enough to damage sensitive devices. Summary of the invention

[0004] The present invention proposes an intelligent electromagnetic protection method and protection system based on a reconfigurable antenna. According to the operating frequency and polarization controllable characteristics of the reconfigurable antenna, an intelligent electromagnetic protection method for electronic systems based on a reconfigurable antenna is designed. By quickly predicting high-power electromagnetic attacks and intelligently reconfiguring the reconfigurable antenna, the electromagnetic energy of the electronic system is reduced through front-door coupling, and the impact of electromagnetic attacks on electronic systems such as radar and communication equipment is reduced, thereby achieving the goal of intelligent electromagnetic protection.

[0005] The technical solution of the present invention is as follows: An intelligent electromagnetic protection method based on a reconfigurable antenna includes electromagnetic signal reception, electromagnetic environment perception analysis, antenna working mode optimization and antenna reconstruction control. First, a reconfigurable antenna is set, the frequency and polarization mode of which can be changed. The electromagnetic signal receiving includes the reconfigurable antenna receiving an external electromagnetic signal at a current operating frequency and polarization mode. Electromagnetic environment perception analysis, including analyzing the current electromagnetic environment characteristics based on the electromagnetic signals received under different operating frequencies and polarization modes, and judging whether there is a high-power microwave attack based on the received electromagnetic environment characteristics. The antenna working mode optimization includes intelligently optimizing the antenna working mode according to the electromagnetic environment perception analysis results. Antenna reconstruction control includes driving the antenna reconstruction control circuit and setting the antenna working state according to the selected frequency and polarization mode.

[0006] As a further optimization of this solution, the operating frequency of the reconfigurable antenna is defined as N, the polarization mode is defined as M, and the electromagnetic environment perception analysis includes Antenna adjustment, control the operating frequency and polarization mode of the reconfigurable antenna, traverse all operating frequency and polarization mode combinations of the antenna, and sense the electromagnetic environment information of the electronic system under different frequencies and polarizations. Signal measurement, under different working frequency and polarization mode combinations, the antenna coupling energy is measured and recorded to obtain electromagnetic information of different frequencies and polarizations in the environment. s i,,j ], where 0≤i≤n-1, 0≤j≤m-1, Electromagnetic environment analysis, based on the electromagnetic environment information obtained by measurement S =[ s i,j ] N×M , analyze the electromagnetic situation faced by current electronic systems and determine the characteristics of the current electromagnetic environment.

[0007] As a further optimization of this solution, after completing the electromagnetic environment analysis, it is determined whether the environmental electromagnetic signal has changed abnormally, and the environmental electromagnetic energy characteristics are matched and analyzed with the high-power microwave pulse characteristics. If the environmental electromagnetic energy characteristics match the high-power microwave characteristics, it is determined to be under attack.

[0008] As a further optimization of this solution, the antenna working mode optimization includes intelligently optimizing the antenna working mode according to the results of electromagnetic environment perception analysis, constructing an antenna working frequency and polarization mode optimization model based on the principle of minimizing front-door coupling energy, and quickly solving the model to obtain the optimized antenna working mode that minimizes the front-door coupling energy.

[0009] As a further optimization of this solution, the antenna working mode optimization includes: Global status analysis, based on electromagnetic environment information S (t ), calculate the changes in the electromagnetic environment under all frequency and polarization mode combinations, and obtain the electromagnetic environment information at subsequent times S ( t’ ), Optimal mode selection, from electromagnetic environment information S ( t’ ), select the antenna operating frequency and polarization mode combination with the smallest coupling energy, which can be S ( t’ ) s i,j ( t ')),frequency f i , Polarization mode P j This is the optimal working mode of the antenna.

[0010] As a further optimization of this solution, antenna reconfiguration control is performed according to the selected frequency f i , Polarization mode P j , drive the antenna reconstruction control circuit and set the antenna working state.

[0011] A smart electromagnetic protection system based on a reconfigurable antenna, the system is used to execute a smart electromagnetic protection method based on a reconfigurable antenna, comprising a microprocessor, the microprocessor controls a connection to a reconstruction control circuit, the reconstruction control circuit is used to adjust an electric adjustment device of the reconfigurable antenna according to a frequency code and a polarization code sent by the microprocessor, and control the reconfigurable antenna to operate in a corresponding frequency and polarization mode, the reconstruction control circuit controls the connection to the reconfigurable antenna, a controlled receiving end of the reconfigurable antenna is provided with an electric adjustment device, the reconfigurable antenna is connected to the reconstruction control circuit by means of the electric adjustment device, and the reconfigurable antenna is communicatively connected to the microprocessor.

[0012] As a further optimization of this solution, the reconstruction control circuit includes a decoding circuit and a driving circuit, the decoding circuit signal is connected to the microprocessor, the signal output end of the decoding circuit is connected to the controlled end of the driving circuit, and the output end of the driving circuit is connected to the electrical adjustment device of the reconfigurable antenna.

[0013] The working principle and beneficial effects of the present invention are: As an antenna that actively transmits detection information and receives remote control commands, it is impossible to use effective electromagnetic shielding to protect against high-power microwave weapons. As a new type of antenna, reconfigurable antenna provides a new direction for active electromagnetic protection of high-power microwave weapons. Reconfigurable antenna is a new type of antenna structure that can quickly change and adjust its operating frequency, polarization mode, radiation pattern and other parameters online. By switching the different states of the antenna, the antenna has multiple working modes, which is conducive to realizing multiple effective diversity in transmission. As a new type of antenna, reconfigurable antenna will become one of the core technologies in the next generation of wireless communication and detection systems.

[0014] The fast reconfiguration characteristics of the working frequency and polarization mode of the reconfigurable antenna provide a new idea for the active intelligent electromagnetic protection of wireless communication and detection systems. Based on the reconfigurable characteristics of the working frequency and polarization mode of the reconfigurable antenna, the environmental electromagnetic information is scanned in real time, and the rapid prediction of electromagnetic attacks is achieved through matching the electromagnetic attack waveform characteristics. Based on the principle of minimizing the front door coupling energy, the working frequency and polarization of the reconfigurable antenna are intelligently optimized to reduce the energy of electromagnetic attacks entering the system through front door coupling, thus realizing the intelligent electromagnetic protection of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 A flowchart of an electromagnetic protection method based on a reconfigurable antenna; Figure 2 This is a flowchart of the method for electromagnetic environment perception analysis in this application; Figure 3 This is a high power microwave pulse waveform diagram; Figure 4 A flowchart of the antenna working mode optimization process; Figure 5 This is the structural block diagram of the intelligent electromagnetic protection system based on reconfigurable antenna; Figure 6 This is the structural block diagram of the experimental system. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] As the instruction manual Figure 1As shown, an intelligent electromagnetic protection method based on a reconfigurable antenna includes electromagnetic signal reception, electromagnetic environment perception analysis, antenna working mode optimization and antenna reconstruction control. First, a reconfigurable antenna is set, and the frequency and polarization mode of the reconfigurable antenna can be changed. The electromagnetic signal reception includes the reconfigurable antenna receiving external electromagnetic signals under the current working frequency and polarization mode. The electromagnetic environment perception analysis includes analyzing the characteristics of the current electromagnetic environment according to the electromagnetic signals received under different working frequencies and polarization modes, and judging whether there is a high-power microwave attack according to the received electromagnetic environment characteristics. The antenna working mode optimization includes intelligently optimizing the antenna working mode according to the electromagnetic environment perception analysis results. The antenna reconstruction control includes driving the antenna reconstruction control circuit and setting the antenna working state according to the selected frequency and polarization mode.

[0019] When the attacking electromagnetic frequency covers the operating frequency of the electronic system, the electromagnetic energy coupled into the electronic system is closely related to the attacking device bandwidth and the electronic system bandwidth. Through reconfigurable antenna technology, the antenna operating frequency range can be increased and the operating bandwidth can be reduced, thereby reducing the electromagnetic energy coupled into the electronic system through the antenna.

[0020] At the same time, based on the controllable agility of frequency and polarization of the reconfigurable antenna, the electromagnetic signals in the working environment of the electronic system are received, sensed and analyzed, the antenna working mode is optimized, and the antenna reconstruction control is performed to change the antenna working frequency and polarization mode, reduce the energy of external interference and attack signal coupling into the electronic system, and achieve the purpose of electromagnetic protection.

[0021] The principle block diagram of the electromagnetic protection method based on reconfigurable antenna is as follows: Figure 1 As shown, it consists of a reconfigurable antenna, electromagnetic signal reception, electromagnetic environment perception and analysis, antenna working mode optimization, antenna reconstruction control, etc.

[0022] Reconfigurable antennas are frequency and polarization composite reconfigurable antennas. Their operating frequency and polarization mode can be controlled by electrical adjustment, so that the operating frequency jumps within a certain frequency range while maintaining a low operating bandwidth. Electromagnetic signal reception, that is, reconstructing the electromagnetic signal received by the antenna at the current operating frequency and polarization mode, is the basis for the electronic system to perceive and analyze the electromagnetic environment in which it is located; Electromagnetic environment perception analysis: analyzing the characteristics of the current electromagnetic environment based on electromagnetic signals received under different operating frequencies and polarization modes; Antenna working mode optimization: According to the electromagnetic environment perception and analysis results, the antenna working frequency and polarization mode are optimized to match the antenna working mode with the current electromagnetic environment and minimize the antenna coupling energy, thereby achieving the purpose of electromagnetic protection. Antenna reconfiguration control controls the operating frequency and polarization mode of the reconfigurable antenna according to the optimally selected operating mode.

[0023] The operating frequency of the reconfigurable antenna is defined as N, the polarization mode is defined as M, and the electromagnetic environment perception analysis includes Antenna adjustment, control the operating frequency and polarization mode of the reconfigurable antenna, traverse all operating frequency and polarization mode combinations of the antenna, and sense the electromagnetic environment information of the electronic system under different frequencies and polarizations. Signal measurement, under different working frequency and polarization mode combinations, the antenna coupling energy is measured and recorded to obtain electromagnetic information of different frequencies and polarizations in the environment. s i,,j ], where 0≤i≤n-1, 0≤j≤m-1, Electromagnetic environment analysis, based on the electromagnetic environment information obtained by measurement S =[ s i,j ] N×M , analyze the electromagnetic situation faced by current electronic systems and determine the characteristics of the current electromagnetic environment.

[0024] In order to obtain the electromagnetic environment information of the missile electronic system and provide a basis for optimizing the antenna working mode, electromagnetic environment perception analysis is first carried out.

[0025] Assume the operating frequency of the reconfigurable antenna is N , respectively f 0. f 1. … f N-1 , the polarization mode is M , respectively P 0. P 1. … P M-1 The electromagnetic environment perception and analysis process is to receive and analyze electromagnetic signals under different antenna operating frequencies and polarization modes. The process is as follows: Figure 2 shown.

[0026] Antenna adjustment means controlling the antenna operating frequency and polarization mode, traversing all antenna operating frequency and polarization mode combinations, and sensing the electromagnetic environment information of the electronic system under different frequencies and polarizations.

[0027] Signal measurement, that is, measuring and recording the antenna coupling energy under different working frequency and polarization mode combinations to obtain electromagnetic information of different frequencies and polarizations in the environment. s i,,j ].

[0028] Electromagnetic environment analysis, based on the electromagnetic environment information obtained by measurement S =[s i,j ] N×M , analyze the electromagnetic situation faced by current electronic systems and determine the characteristics of the current electromagnetic environment.

[0029] During the measurement, if the number of antenna operating frequencies N , number of polarization modes M Slightly larger, the number of combinations MN If there are more, the combination of measurement frequency and polarization mode can be optimized, and the measurement speed and timeliness of electromagnetic environment perception can be improved by reducing the number of measurements. At this time, the electromagnetic environment information obtained is recorded as S ', S 'yes S sub-matrix of .

[0030] Since different combination measurements have a time sequence, the electromagnetic environment information matrix S’ With time t Related Since only some frequencies and polarization modes were measured, S '( t ) have no measured values ​​and are represented by “-”.

[0031] During the analysis, according to S '( t ), that is, the spatial electromagnetic environment information of different frequencies and different times, and the fitting analysis of the electromagnetic environment information of each frequency over time, that is, the obtained S ( t )information. S ( t ) reflects the temporal variation of the electromagnetic environment, can be used to predict electromagnetic attacks, and provide a basis for optimizing antenna operating modes.

[0032] After completing the electromagnetic environment analysis, determine whether the environmental electromagnetic signal changes abnormally, match and analyze the environmental electromagnetic energy characteristics with the high-power microwave pulse characteristics, and if the environmental electromagnetic energy characteristics match the high-power microwave characteristics, it is determined to be under attack.

[0033] The antenna working mode optimization includes intelligently optimizing the antenna working mode according to the electromagnetic environment perception analysis results, building an antenna working frequency and polarization mode optimization model based on the principle of front door coupling energy minimization, and obtaining the optimized antenna working mode that minimizes the front door coupling energy through rapid model solving. Typical high power microwave pulse waveforms are as follows: Figure 3 As shown in Figure 2. During the attack of high-power microwave weapons, the microwave pulse energy takes a period of rise time to reach its maximum value, and the rise time makes it possible to predict electromagnetic attacks.

[0034] When the environmental electromagnetic signal changes abnormally, the environmental electromagnetic energy characteristics are matched and analyzed with the high-power microwave pulse characteristics. If the environmental electromagnetic energy characteristics match the high-power microwave characteristics, it can be predicted that a high-power microwave attack is occurring. Before the maximum power reaches the maximum value, the reconfigurable antenna working mode can be adjusted to minimize the electromagnetic energy of the electronic system through antenna coupling.

[0035] Antenna working mode optimization includes intelligent optimization of antenna working mode according to the results of electromagnetic environment perception analysis. Based on the principle of minimizing front door coupling energy, an optimization model of antenna working frequency and polarization mode is constructed. Through rapid solution of the model, the optimal antenna working mode that minimizes front door coupling energy is obtained. According to the determined working frequency and polarization mode, the antenna is reconstructed and controlled to minimize the energy entering the electronic system through antenna coupling, so as to achieve electromagnetic intelligent protection effect.

[0036] The antenna working mode optimization process is as follows: Figure 4 As shown, it includes current state analysis, global state analysis, optimal mode selection, and antenna reconstruction control.

[0037] Global status analysis, based on electromagnetic environment information S ( t ), calculate the changes in the electromagnetic environment under all frequency and polarization mode combinations, and obtain the electromagnetic environment information at subsequent times S ( t’ ), Optimal mode selection, from electromagnetic environment information S ( t’ ), select the antenna operating frequency and polarization mode combination with the smallest coupling energy, which can be S ( t’ ) s i,j ( t ')),frequency f i , Polarization mode P j This is the optimal working mode of the antenna.

[0038] Current status analysis, based on electromagnetic environment information obtained through electromagnetic environment perception S ( t ), calculate the change of antenna coupling energy under the current antenna frequency and polarization state s i,j (t). If the coupling energy remains low or below a certain threshold in the current antenna state, the antenna will continue to operate at the current frequency and polarization mode; if the coupling energy gradually increases, at a certain moment t'If the threshold is exceeded, a global status analysis is performed; Global status analysis, based on electromagnetic environment information S ( t ), calculate the changes in the electromagnetic environment under all frequency and polarization mode combinations, and obtain the electromagnetic environment information at subsequent times S ( t’ ); Optimal mode selection, that is, from the electromagnetic environment information S ( t’ ), select the antenna operating frequency and polarization mode combination with the smallest coupling energy, which can be S ( t’ ) s i,j ( t ')),frequency f i , Polarization mode P j That is the optimal working mode of the antenna; Antenna reconfiguration control, according to the selected frequency f i , Polarization mode P j , drive the antenna reconstruction control circuit and set the antenna working state.

[0039] As attached Figure 5 As shown, an intelligent electromagnetic protection system based on a reconfigurable antenna is used to execute an intelligent electromagnetic protection method based on a reconfigurable antenna, including a microprocessor, the microprocessor controls a connection to a reconstruction control circuit, the reconstruction control circuit is used to adjust the electric adjustment device of the reconfigurable antenna according to the frequency code and polarization code sent by the microprocessor, and control the reconfigurable antenna to work in a corresponding frequency and polarization mode, the reconstruction control circuit controls the connection to the reconfigurable antenna, the controlled receiving end of the reconfigurable antenna is provided with an electric adjustment device, the reconfigurable antenna is connected to the reconstruction control circuit by means of the electric adjustment device, the reconfigurable antenna is communicatively connected to the microprocessor, the reconstruction control circuit includes a decoding circuit and a driving circuit, the decoding circuit signal is connected to the microprocessor, the signal output end of the decoding circuit is connected to the controlled end of the driving circuit, and the output end of the driving circuit is connected to the electric adjustment device of the reconfigurable antenna.

[0040] Figure 5 The antenna reconstruction control process shown is composed of a microprocessor and a reconstruction control circuit.

[0041] The microprocessor performs electromagnetic environment perception analysis and antenna working mode optimization, determines the working frequency and polarization mode of the reconfigurable antenna according to the optimal mode, and sends the frequency code and polarization code; The reconstruction control circuit adjusts the electrical adjustment device of the reconfigurable antenna according to the frequency code and polarization code sent by the microprocessor, and controls the reconfigurable antenna to work in the corresponding frequency and polarization mode.

[0042] The reconstruction control circuit consists of two parts: a decoding circuit and a driving circuit. The decoding circuit converts the frequency code and polarization code sent by the microprocessor into the corresponding electrical adjustment level; the driving circuit sends the driving level to the electrical adjustment device in the reconfigurable antenna according to the decoding circuit result, and adjusts the antenna's operating frequency and polarization mode to the optimal mode.

[0043] Based on the reconfigurable antenna design and analysis software, we design and manufacture reconfigurable antennas for specific frequency ranges and polarization modes. Based on this, we design and implement the control system and build the experimental system. Figure 6 shown.

[0044] Figure 6 The experimental system shown is composed of a reconfigurable antenna, a radio frequency transceiver module, a host computer, a receiving module, a signal detection and sampling module, a microprocessor, an antenna controller, a jammer and an antenna.

[0045] Reconfigurable antenna, i.e., a reconfigurable antenna with frequency and polarization mode agility capability manufactured according to the design results of reconfigurable antenna design and analysis software; The RF transceiver module generates the transmission signal and receives the echo signal during the operation of the reconfigurable antenna, completing the basic functions of the electronic system's RF signal transmission and reception; The host computer controls the working state of the RF transceiver module, and thus completes the control of the working process of the electronic system. It receives the antenna working mode optimization result of the microprocessor, and controls the RF transceiver module to generate a corresponding frequency transmission signal according to the antenna working frequency; analyzes the echo signal received by the RF transceiver module, and thus determines the working state of the electronic system; A receiving module receives antenna electromagnetic signals during electromagnetic environment analysis; The signal detection and sampling module detects and samples the radio frequency signal received by the receiving module, converts it into a digital signal, and then sends it to the microprocessor; The microprocessor performs electromagnetic environment perception analysis and antenna working mode optimization based on the signals received by the RF transceiver module, and sends control signals to the host computer and antenna controller according to the perception process requirements and optimization results; An antenna controller sends a control signal to the reconfigurable antenna to control the operating frequency and polarization mode of the antenna; Interference equipment and antennas send interference and attack signals of various frequencies and types to the antenna, providing interference sources for the protection effect analysis of the test system.

[0046] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0047] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0048] Each functional unit in each embodiment of the present invention may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit. If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and may also instruct the relevant hardware to complete it through a computer program. The computer program may be stored in a computer-readable storage medium, and the computer program may be executed by the processor to implement the steps of the above-mentioned method embodiments. Among them, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media does not include electrical carrier signals and telecommunications signals.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent electromagnetic protection method based on a reconfigurable antenna, characterized in that: Including electromagnetic signal reception, electromagnetic environment perception analysis, antenna working mode optimization and antenna reconstruction control, First, a reconfigurable antenna is set, the frequency and polarization mode of which can be changed. The electromagnetic signal receiving includes the reconfigurable antenna receiving an external electromagnetic signal at a current operating frequency and polarization mode. Electromagnetic environment perception analysis, including analyzing the current electromagnetic environment characteristics based on the electromagnetic signals received under different operating frequencies and polarization modes, and judging whether there is a high-power microwave attack based on the received electromagnetic environment characteristics. The antenna working mode optimization includes intelligently optimizing the antenna working mode according to the electromagnetic environment perception analysis results. Antenna reconstruction control includes driving the antenna reconstruction control circuit and setting the antenna working state according to the selected frequency and polarization mode.

2. According to claim 1, the intelligent electromagnetic protection method based on reconfigurable antenna is characterized in that: The operating frequency of the reconfigurable antenna is defined as N, the polarization mode is defined as M, and the electromagnetic environment perception analysis includes Antenna adjustment, control the operating frequency and polarization mode of the reconfigurable antenna, traverse all operating frequency and polarization mode combinations of the antenna, and sense the electromagnetic environment information of the electronic system under different frequencies and polarizations. Signal measurement, under different working frequency and polarization mode combinations, the antenna coupling energy is measured and recorded to obtain electromagnetic information of different frequencies and polarizations in the environment. s i,,j ], where 0≤i≤n-1, 0≤j≤m-1, Electromagnetic environment analysis, based on the electromagnetic environment information obtained by measurement S =[ s i,j ] N×M , analyze the electromagnetic situation faced by current electronic systems and determine the characteristics of the current electromagnetic environment.

3. The intelligent electromagnetic protection method based on reconfigurable antenna according to claim 2 is characterized in that: After completing the electromagnetic environment analysis, determine whether the environmental electromagnetic signal changes abnormally, match and analyze the environmental electromagnetic energy characteristics with the high-power microwave pulse characteristics, and if the environmental electromagnetic energy characteristics match the high-power microwave characteristics, it is determined to be under attack.

4. The intelligent electromagnetic protection method based on reconfigurable antenna according to claim 2 is characterized in that: The antenna working mode optimization includes intelligently optimizing the antenna working mode according to the electromagnetic environment perception analysis results, constructing an antenna working frequency and polarization mode optimization model based on the principle of minimizing front door coupling energy, and quickly solving the model to obtain the optimized antenna working mode that minimizes the front door coupling energy.

5. The intelligent electromagnetic protection method based on reconfigurable antenna according to claim 4 is characterized in that: The antenna working mode optimization includes: Global status analysis, based on electromagnetic environment information S ( t ), calculate the changes in the electromagnetic environment under all frequency and polarization mode combinations, and obtain the electromagnetic environment information at subsequent times S ( t’ ), Optimal mode selection, from electromagnetic environment information S ( t’ ), select the antenna operating frequency and polarization mode combination with the smallest coupling energy, which can be S ( t’ ) s i,j ( t ')),frequency f i , Polarization mode P j This is the optimal working mode of the antenna.

6. The intelligent electromagnetic protection method based on reconfigurable antenna according to claim 5, characterized in that: Antenna reconfiguration control, according to the selected frequency f i , Polarization mode P j , drive the antenna reconstruction control circuit and set the antenna working state.

7. An intelligent electromagnetic protection system based on a reconfigurable antenna, the system is used to execute the intelligent electromagnetic protection method based on a reconfigurable antenna according to claims 1-6, characterized in that: The invention comprises a microprocessor, wherein the microprocessor controls a connection to a reconstruction control circuit, wherein the reconstruction control circuit is used to adjust an electric adjustment device of a reconfigurable antenna according to a frequency code and a polarization code sent by the microprocessor, and control the reconfigurable antenna to work in a corresponding frequency and polarization mode, wherein the reconstruction control circuit controls the connection to the reconfigurable antenna, wherein the controlled receiving end of the reconfigurable antenna is provided with an electric adjustment device, wherein the reconfigurable antenna is connected to the reconstruction control circuit by means of the electric adjustment device, and the reconfigurable antenna is communicatively connected to the microprocessor.

8. The intelligent electromagnetic protection system based on reconfigurable antenna according to claim 7 is characterized in that: The reconstruction control circuit includes a decoding circuit and a driving circuit. The decoding circuit signal is connected to the microprocessor, the signal output end of the decoding circuit is connected to the controlled end of the driving circuit, and the output end of the driving circuit is connected to the electrical adjustment device of the reconfigurable antenna.

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