A method for generating a high-power pseudo-random signal by a magnetron

Abstract

This application discloses a method for generating high-power pseudo-random signals using a magnetron, relating to the field of random signal generation technology. This invention enables the generation of kilowatt-level high-power pseudo-random microwave signals using a magnetron, meeting the demand for high-power signals in fields such as electronic countermeasures. By pseudo-randomly controlling the anode voltage and cathode current, combined with the magnetron's own circuitry and frequency characteristic equations, the output signal varies randomly over a wide frequency range, exhibiting randomness in both frequency and amplitude. This method can be effectively applied to jamming in communication systems and is of great value in the field of electronic countermeasures. The closed-loop control method for adjusting the anode voltage and cathode current improves signal stability and accuracy. It also fully utilizes the high efficiency and low cost of the magnetron, resulting in a high cost-performance ratio for the entire system. The system is easy to promote and apply, with clearly defined operation steps that can be automated via an MCU or host computer, reducing the difficulty and error of manual operation.

Description

Technical Field

[0001] This invention relates to the field of random signal generation technology, and in particular to a method for generating high-power pseudo-random signals using a magnetron. Background Technology

[0002] In recent years, wireless communication technology has developed rapidly and has become closely related to people's daily lives, providing many conveniences and greatly enriching people's communication methods. It is widely used in civilian and military fields. However, the interference problem of communication systems has always been a hot issue of general concern. While wireless communication technology is developing rapidly, it has also generated a complex electromagnetic environment, which will greatly affect the quality of wireless communication.

[0003] Random numbers can be generated using a microcontroller or other means. The specific program varies depending on the hardware used. In a step-up / step-down module based on random numbers, the voltage is modified and superimposed on the anode voltage of the magnetron. The magnetron emits microwaves with randomly changing frequencies due to the random changes in the anode voltage.

[0004] Existing methods for generating high-power pseudo-random signals using magnetrons are challenging and costly. Firstly, for targeted tracking interference, accurately detecting the frequency-hopping signal of the system to be interfered with and rapidly generating the interference signal in the time domain using algorithms is difficult and costly. Furthermore, they face challenges such as the inability to track excessively fast frequency-hopping signals. Secondly, for repeater-based tracking interference, there is a time delay, making it difficult and costly to reduce the interference time interval. Thirdly, for broadband noise interference and frequency sweeping interference in blocking interference, the necessary condition is that the power of the interference signal must be much greater than the power of the signal emitted by the communication system to achieve effective interference. High-power amplifiers are very expensive. Therefore, this paper proposes a method for generating high-power pseudo-random signals using magnetrons. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, the present invention provides a method for generating high-power pseudo-random signals using a magnetron.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a method for generating high-power pseudo-random signals using a magnetron, characterized by comprising the following steps:

[0009] Step 1: System initialization preparation, check the status of magnetron and related equipment, and initialize the MCU or host computer;

[0010] Step 2: Generate a pseudo-random code sequence using the MCU or host computer, parse the pseudo-random code sequence and convert it into anode voltage control signal and cathode current control signal;

[0011] Step 3: Set the preset variation range for the anode voltage and cathode current, and input them to the power supply circuit;

[0012] Step 4: Transmit the control signal to the power supply circuit of the magnetron;

[0013] Step 5: Adjust the anode voltage according to the anode voltage control signal and adjust the cathode current according to the cathode current control signal. The control signals for both the anode voltage and the cathode current change according to a pseudo-random pattern within their respective preset ranges, and both are subject to closed-loop control.

[0014] Step 6: The randomly varying anode voltage and cathode current are superimposed on the anode and cathode of the magnetron through a high-power load;

[0015] Step 7: Under the action of the voltage and current described above, the magnetron, combined with the circuit equations of its free oscillation state and the equations of output frequency and anode voltage, generates a broadband microwave signal with randomly varying frequency and amplitude.

[0016] Step 8: Monitor the output signal and feed the data back to the MCU or host computer for parameter adjustment;

[0017] Step 9: Monitor the status of system equipment in real time and perform regular maintenance on the system equipment.

[0018] As a preferred embodiment of the high-power pseudo-random signal generation method for magnetrons described in this invention, the pseudo-random code sequence adopts an M-sequence or a Gold sequence, and its code length and clock frequency can be set according to requirements.

[0019] In a preferred embodiment of the high-power pseudo-random signal generation method for a magnetron described in this invention, the preset variation range of the anode voltage is 1kV-5kV, and the preset variation range of the cathode current is 0.5A-2A.

[0020] In a preferred embodiment of the high-power pseudo-random signal generation method for a magnetron described in this invention, the anode voltage is monitored in real time by a voltage sensor, and a closed-loop control is formed, achieving a control accuracy of ±50V.

[0021] In a preferred embodiment of the high-power pseudo-random signal generation method for a magnetron described in this invention, the cathode current is monitored in real time by a current sensor, and a closed-loop control is formed, achieving a control accuracy of ±0.05A.

[0022] In a preferred embodiment of the magnetron high-power pseudo-random signal generation method of the present invention, the impedance of the high-power load is 50Ω, which is matched with the magnetron and the power supply circuit.

[0023] As a preferred embodiment of the high-power pseudo-random signal generation method for a magnetron described in this invention, the circuit equation of the magnetron in its free oscillation state is as follows: The equation relating the output frequency to the anode voltage is as follows: .

[0024] In a preferred embodiment of the magnetron high-power pseudo-random signal generation method of the present invention, the microwave signal has a frequency range of 2GHz-8GHz and a power of 1kW-6kW.

[0025] In a preferred embodiment of the magnetron high-power pseudo-random signal generation method of the present invention, a spectrum analyzer is used to monitor the output signal, and the monitoring parameters include frequency range, amplitude variation, and power.

[0026] (III) Beneficial Effects

[0027] This invention provides a method for generating high-power pseudo-random signals using a magnetron. It offers the following advantages:

[0028] 1. This technology can generate kilowatt-level high-power pseudo-random microwave signals using magnetrons, meeting the demand for high-power signals in fields such as electronic countermeasures. By pseudo-randomly controlling the anode voltage and cathode current, combined with the magnetron's own circuit and frequency characteristic equations, the output signal can be randomly varied over a wide frequency range, with both frequency and amplitude exhibiting randomness. This can be effectively applied to jamming interference in communication systems and is of great value to the field of electronic countermeasures.

[0029] 2. The closed-loop control method is adopted to adjust the anode voltage and cathode current, which improves the stability and accuracy of the signal. At the same time, it makes full use of the high efficiency and low cost of the magnetron, making the whole system have a high cost performance and easy to promote and apply. The system operation steps are clear and can be automated through MCU or host computer, reducing the difficulty and error of manual operation.

[0030] 3. Based on the advantages of magnetrons such as low price and high power, by superimposing random voltage and current, a broadband pseudo-random continuous microwave with constantly changing frequency is generated to suppress the power of the communication system and block the entire frequency band. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the magnetron of the present invention in a free oscillation state.

[0033] Figure 2 This is a schematic diagram of the magnetron free oscillation circuit of the present invention. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] Example 1

[0036] Select a certain type of industrial-grade magnetron (rated power 1kW-6kW) and implement it according to the following steps:

[0037] System initialization preparation: Check that the cathode filament, anode blades and other components of the magnetron are undamaged, connect the output antenna and magnetic circuit, prepare the STM32F4 series MCU, magnetron dedicated power supply circuit (including anode high voltage module and cathode current module), 50Ω high power load, spectrum analyzer and other equipment, and install the M-sequence pseudo-random code generation program in the MCU.

[0038] Pseudo-random code generation: The MCU runs an M-sequence pseudo-random code generation program, sets the code length to 1023, and the clock frequency to 1MHz, generates an M-sequence pseudo-random code sequence and stores it in the MCU's memory.

[0039] Among them, the frequency changes randomly at a fast enough speed, as if it appears at every frequency point in the corresponding frequency band at the same time, which is equivalent to blocking every point in the frequency band with countless individual signals that do not change. This saves energy and will not be able to be analyzed to find a pattern, but the speed of change must be fast enough.

[0040] Pseudo-random code parsing and conversion: The MCU parses the M-sequence pseudo-random code sequence and converts it into an anode voltage control signal (0-5V analog signal, corresponding to an anode voltage of 1kV-5kV) and a cathode current control signal (0-3V analog signal, corresponding to a cathode current of 0.5A-2A).

[0041] Power circuit parameter settings: ( Figure 2 In the control module of the magnetron power supply circuit, the anode voltage variation range is set to 1kV-5kV, and the cathode current variation range is set to 0.5A-2A.

[0042] Control signal transmission: The MCU transmits the anode voltage control signal and cathode current control signal to the magnetron power supply circuit via the shielded wire through the DAC interface.

[0043] Anode voltage regulation: After receiving the control signal, the anode high-voltage module adjusts the output voltage through the high-frequency switching power supply voltage regulation circuit, so that the anode voltage varies according to a pseudo-random pattern within the range of 1kV-5kV. The voltage sensor monitors the anode voltage in real time and feeds back the data to the MCU to achieve closed-loop control with a control accuracy of ±50V.

[0044] Cathode current regulation: After receiving the control signal, the cathode current regulation module regulates the cathode current through the transistor constant current circuit, so that the cathode current changes according to a pseudo-random law in the range of 0.5A-2A. The current sensor monitors the cathode current in real time and feeds back the data to the MCU. The control accuracy reaches ±0.05A. Changing the cathode current is also based on random numbers, and then the cathode current is changed through the corresponding microcontroller program or equivalent electrical method.

[0045] High-power load superposition: The varying anode voltage and cathode current are superimposed on the anode and cathode of the magnetron respectively through a 50Ω high-power load.

[0046] This applies to any device that operates on the same principle as a magnetron, not limited to 2.45GHz magnetrons; 5.8GHz and 0.9GHz are also applicable.

[0047] Magnetron Oscillation and Signal Generation: Under the influence of the voltage and current described above, the magnetron, combined with the circuit equations of its free oscillation state and the equations of output frequency and anode voltage, generates a pseudo-random microwave signal with a frequency range of 2GHz-8GHz and an amplitude range of 1kW-6kW that varies randomly. Changing the output frequency of the magnetron can be achieved by changing the magnetron (anode voltage / cathode current / magnetic field strength).

[0048] Not only can the anode voltage change, but the cathode current can also change, and therefore the magnetic field can also change. Changing the current in a current-carrying coil can also change the magnetic field.

[0049] Signal output and amplification: The microwave signal is output through the output antenna, and the required power can be achieved without additional amplification circuitry.

[0050] Signal monitoring and feedback: The spectrum analyzer monitors the output signal in real time and feeds back data such as frequency and amplitude to the MCU. The MCU compares the data with preset parameters, and if there is a deviation, it adjusts the pseudo-random code generation parameters to make the output signal meet the requirements.

[0051] System stable operation and maintenance: Real-time monitoring of magnetron temperature (controlled below 80℃), power circuit voltage and other parameters. The system is maintained every 100 hours of operation, cleaning the magnetron surface and checking whether the circuit connections are secure.

[0052] The internal cavity structure of the magnetron can also be changed, but the frequency of this change is not as fast as that of digital control.

[0053] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A method for generating high-power pseudo-random signals using a magnetron, characterized in that: Includes the following steps: Step 1: System initialization preparation, check the status of magnetron and related equipment, and initialize the MCU or host computer; Step 2: Generate a pseudo-random code sequence through the MCU or host computer, parse the pseudo-random code sequence and convert it into anode voltage control signal and cathode current control signal; Step 3: Set the preset variation range for the anode voltage and cathode current, and input them to the power supply circuit; Step 4: Transmit the control signal to the power supply circuit of the magnetron; Step 5: Adjust the anode voltage according to the anode voltage control signal and adjust the cathode current according to the cathode current control signal. The control signals for both the anode voltage and the cathode current change according to a pseudo-random pattern within their respective preset ranges, and both are subject to closed-loop control. Step 6: The randomly varying anode voltage and cathode current are superimposed on the anode and cathode of the magnetron through a high-power load; Step 7: Under the action of the voltage and current described above, the magnetron, combined with the circuit equations of its free oscillation state and the equations of output frequency and anode voltage, generates a broadband microwave signal with randomly varying frequency and amplitude. Step 8: Monitor the output signal and feed the data back to the MCU or host computer for parameter adjustment; Step 9: Monitor the status of system equipment in real time and perform regular maintenance on the system equipment.

2. The method for generating high-power pseudo-random signals using a magnetron according to claim 1, characterized in that: The pseudo-random code sequence adopts an M-sequence or a Gold sequence, and its code length and clock frequency can be set according to requirements.

3. The method for generating high-power pseudo-random signals using a magnetron according to claim 1, characterized in that: The preset variation range of the anode voltage is 1kV-5kV, and the preset variation range of the cathode current is 0.5A-2A.

4. The method for generating high-power pseudo-random signals using a magnetron according to claim 1, characterized in that: The anode voltage is monitored in real time by a voltage sensor, and a closed-loop control is formed, with a control accuracy of ±50V.

5. The method for generating high-power pseudo-random signals using a magnetron according to claim 1, characterized in that: The cathode current is monitored in real time by a current sensor, and a closed-loop control is formed, with a control accuracy of ±0.05A.

6. The method for generating high-power pseudo-random signals using a magnetron according to claim 1, characterized in that: The impedance of the high-power load is 50Ω, which is matched with the magnetron and power supply circuit.

7. The method for generating high-power pseudo-random signals using a magnetron according to claim 1, characterized in that: The circuit equation for the magnetron in its free oscillation state is as follows: The equation relating the output frequency to the anode voltage is as follows: .

8. The method for generating high-power pseudo-random signals using a magnetron according to claim 1, characterized in that: The microwave signal has a frequency range of 2GHz-8GHz and a power of 1kW-6kW.

9. The method for generating high-power pseudo-random signals using a magnetron according to claim 1, characterized in that: A spectrum analyzer is used to monitor the output signal, and the monitored parameters include frequency range, amplitude variation, and power.

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