Anti-interference control circuit for unmanned aerial vehicle obstacle avoidance radar communication

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By utilizing the anti-interference control circuit of the UAV obstacle avoidance radar communication, and employing filtering, amplification, mixing, and automatic gain control modules, the problem of interference to the UAV obstacle avoidance radar in complex electromagnetic environments has been solved, thus enabling the safe flight of the UAV.

CN223977347UActive Publication Date: 2026-03-06LEZHISHAN INFORMATION TECHNOLOGY (SHENZHEN) CO LTD

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Patent Information

Application Number: CN202520164901.8
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2025-01-24
Publication Date: 2026-03-06
Estimated Expiration: 2035-01-24

AI Technical Summary

Technical Problem

Unmanned aerial vehicle (UAV) obstacle avoidance radar is susceptible to interference in complex electromagnetic environments, which can lead to misjudgment or failure to detect obstacles, affecting flight safety.

Method used

An anti-interference control circuit for UAV obstacle avoidance radar communication was designed, including a filtering module, an amplification module, a detection module, a mixing module, an automatic gain control module, and a main control module. By filtering out interference signals, amplifying weak signals, changing the signal frequency, and automatically adjusting the gain, the circuit ensures that the signal is correctly received and processed under strong interference.

Benefits of technology

This improves the anti-interference capability of drones in complex electromagnetic environments and ensures their safe flight.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model belongs to the technical field of unmanned aerial vehicle obstacle avoidance radars, and particularly discloses an anti-interference control circuit for unmanned aerial vehicle obstacle avoidance radar communication, which comprises a filtering module used for filtering signals outside a working frequency band and interference signals; the amplification module is used for amplifying the received weak signal; according to the utility model, the filtering module is used for filtering out signals and interference signals outside a working frequency band, the amplification module is used for amplifying the received weak signals, and the detection module can help to identify and separate useful signal components so as to enhance the anti-interference capability of the unmanned aerial vehicle. The frequency mixing module avoids an interference frequency band by changing the frequency of the signal, and the unmanned aerial vehicle adapts to interference signals with different intensities through the automatic gain control module, so that the signal can be correctly received and processed under strong interference, and the anti-interference capability of the unmanned aerial vehicle is effectively improved.

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Description

Technical Field

[0001] This utility model relates to the field of UAV obstacle avoidance radar technology, specifically an anti-interference control circuit for UAV obstacle avoidance radar communication. Background Technology

[0002] Unmanned aerial vehicle (UAV) obstacle avoidance radar detects and calculates distances to surrounding obstacles by transmitting high-frequency electromagnetic waves and receiving reflected signals. The stability and accuracy of the radar system are crucial in this process. During flight, UAVs may encounter complex electromagnetic environments, such as interference from other wireless communication devices and electromagnetic interference from natural phenomena like lightning. These interference signals can disrupt the normal operation of the radar system, leading to misjudgments or failure to detect obstacles. Therefore, we need to propose an anti-interference control circuit for UAV obstacle avoidance radar communication to address these problems, effectively improving the system's anti-interference capability and ensuring safe flight of the UAV in complex electromagnetic environments. Summary of the Invention

[0003] The purpose of this invention is to provide an anti-interference control circuit for UAV obstacle avoidance radar communication, which can effectively improve the system's anti-interference capability and ensure the safe flight of UAVs in complex electromagnetic environments, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an anti-interference control circuit for UAV obstacle avoidance radar communication, comprising: a filtering module for filtering out signals and interference signals outside the operating frequency band;

[0005] An amplification module for amplifying a received weak signal, wherein the input terminal of the amplification module is electrically connected to the output terminal of the filtering module;

[0006] A detector module for extracting modulation information from a modulated signal, wherein the input of the detector module is connected to the output of the amplification module;

[0007] A mixing module for mixing the received signal with the local oscillator signal, wherein the output terminal of the detector module is connected to the input terminal of the mixing module;

[0008] An automatic gain control module, wherein the input terminal of the automatic gain control module is connected to the output terminal of the mixer module;

[0009] The main control module is connected to the control terminals of the filtering module, amplification module, detection module, mixing module, and automatic gain control module.

[0010] Preferably, the filtering module includes a transformer T1, an amplifier U1, and an amplifier U2. A resistor R2 and a crystal oscillator X1 are connected in parallel on the input side of the transformer T1. A resistor R1, a capacitor C2, and a resistor R6 are connected in series at the connection point of the transformer T1 and the resistor R2. A diode D1 is connected to the connection point of the resistor R6 and the capacitor C2. A transistor N2 is connected to the connection point of the diode D1 and the capacitor C2. The collector of the transistor N2 is connected to the other end of the resistor R6. A resistor R8 is connected to ground at the emitter of the transistor N2. The base of the transistor N2 is connected to the connection point of the diode D1 and the capacitor C2. A capacitor C4, a resistor R9, and a capacitor C3 are connected in series at the negative terminal of the amplifier U1. One of the capacitors C3... The other end of the capacitor C3 is connected to the other end of the resistor R6. Resistors R7 and R3 are connected in series on the connection end of the capacitor C3 and the resistor R6. A capacitor E2 is connected to ground on the connection end of the resistor R7 and the resistor R3. The positive terminal of the amplifier U1 is connected to the other end of the resistor R3 through the resistor R11. A capacitor C6, a resistor R14, and a capacitor C7 are connected in series between the output terminal of the amplifier U1 and the negative terminal of the amplifier U2. The positive terminal of the amplifier U2 is connected to the positive terminal of the amplifier U1. A capacitor C9 is connected to the output terminal of the amplifier U2. A diode D3 is connected to one end of the capacitor C9. A resistor R17 is connected to one end of the diode D3. A transistor N3 is connected to one end of the resistor R17 for connection to the main control module.

[0011] Preferably, the amplification module includes amplifier U1A and amplifier U1B. The negative terminal of amplifier U1A is connected to a capacitor C17 for connection to the main control module. A capacitor C28 and a resistor R81 are connected between the output terminal of amplifier U1A and the negative terminal of amplifier U1B. A resistor R31, a capacitor C29, and a resistor R41 are connected in parallel to the positive terminal of amplifier U1A. A resistor R51 is connected between the negative terminal of amplifier U1A and its output terminal. The negative terminal of amplifier U1B... A capacitor C27 and a resistor R91 are connected in parallel between the output terminal and the output terminal. A capacitor C23 is connected to the output terminal of the amplifier U1B. One end of the capacitor C23 is connected to an adjustable resistor W2 and a resistor R77 in series. One end of the adjustable resistor W2 is connected to a transistor N1. A resistor R84 and a capacitor C84 are connected in parallel to the emitter of the transistor N1. A resistor R39 and a resistor R46 are connected in series to the collector of the transistor N1. One end of the resistor R46 is connected to the connection terminal of the capacitor C23 and the adjustable resistor W2.

[0012] Preferably, the detection module includes a transistor Q201 and an I-type inductor L21. One end of the I-type inductor L21 is connected in parallel with a capacitor C202 and a capacitor C201 to ground. One end of the capacitor C202 is connected to the base of the transistor Q201. A resistor R201 is connected to the connection point between the base of the transistor Q201 and the capacitor C202. The collector of the transistor Q201 is connected to a resistor R202. One end of the resistor R202 is connected to one end of the resistor R201. A capacitor C203 is connected to the connection point between the transistor Q201 and the resistor R202. One end of the capacitor C203 is connected to a diode D201 and a diode D202. One end of the diode D201 is connected in parallel with a capacitor C204 and a resistor R203. One end of the resistor R203, one end of the capacitor C204, and one end of the diode D202 are all grounded.

[0013] Preferably, the mixing module includes amplifier U3 and amplifier U4. Resistors R305 and R304 are connected in parallel to the negative terminal of amplifier U3. One end of resistor R304 is connected to capacitor C301. One end of capacitor C301 is connected to adjustable resistor R301. One end of resistor R305 is connected to capacitor C302. One end of capacitor C302 is connected to adjustable resistor R302. The output terminal of amplifier U3 is connected to resistor R307. One end of resistor R307 is connected to the negative terminal of amplifier U4. The output terminal of amplifier U4 is connected to capacitor C309. One end of capacitor C309 is connected to resistor R309. The positive terminal of amplifier U4 is connected to a power supply module. The positive terminal of amplifier U3 is connected to the power supply module.

[0014] Preferably, the automatic gain control module includes an arithmetic unit U32 and an arithmetic unit U31. The positive terminal of the arithmetic unit U31 is connected to a resistor R401 for receiving signals. A resistor R402 is connected between the output terminal and the negative terminal of the arithmetic unit U31. A transistor Q301 is connected to the connection point of the resistor R402 and the negative terminal of the arithmetic unit U31. The output terminal of the arithmetic unit U32 is connected to the base of the transistor Q301. An adjustable resistor R408 is connected to the output terminal of the arithmetic unit U31. A resistor is connected between the negative terminal and the output terminal of the arithmetic unit U32. R403, the positive terminal of the arithmetic unit U32 is connected to a resistor R405, one end of the resistor R405 is connected in parallel to a resistor R406 and a capacitor C401, one end of the resistor R406 is connected in parallel to a capacitor C402, a diode D401 and a resistor R407, one end of the diode D401 is connected to one end of an adjustable resistor R408, one end of the resistor R407 and one end of the capacitor C402 are both connected to one end of the capacitor C401, the connection end of the capacitor C401 and the capacitor C402 is connected to the negative terminal of the arithmetic unit U32 through a resistor R404.

[0015] Preferably, the main control module includes a control chip U5. A crystal oscillator X4 is connected between pins 26 and 27 of the control chip U5. One end of the crystal oscillator X4 is connected to a capacitor C43 to ground, and the other end of the crystal oscillator X4 is connected to a capacitor C34 to ground. A resistor R144 and a switch SET1 are connected in parallel at pin 20 of the control chip U5. One end of the switch SET1 is connected to a switch SET2. One end of the switch SET2 is connected to a resistor R64. One end of the resistor R64 is connected to the other end of the resistor R144, and the connection point of the resistor R64 and the switch SET2 is connected to pin 19 of the control chip U5.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model utilizes the cooperation of a filtering module, an amplification module, a detection module, a mixing module, an automatic gain control module, and a main control module. The filtering module filters out signals and interference signals outside the operating frequency band, and the amplification module amplifies the received weak signals to increase their strength. The detection module helps identify and separate useful signal components to enhance the anti-interference capability of the UAV. The mixing module avoids interference frequency bands by changing the signal frequency, and the automatic gain control module allows the UAV to adapt to interference signals of different intensities, ensuring that the signal can be correctly received and processed even under strong interference. This effectively improves the anti-interference capability of the UAV and ensures its safe flight in complex electromagnetic environments. Attached Figure Description

[0018] Figure 1 This is a block diagram of the circuit structure of this utility model;

[0019] Figure 2 This is the circuit diagram of the filter module of this utility model;

[0020] Figure 3 This is the circuit diagram of the amplification module of this utility model;

[0021] Figure 4 This is the circuit diagram of the detector module of this utility model;

[0022] Figure 5 This is a circuit diagram of the mixer module of this utility model;

[0023] Figure 6 This is a circuit diagram of the automatic gain control module of this utility model;

[0024] Figure 7 This is the circuit diagram of the main control module of this utility model. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-7 This utility model provides a technical solution: an anti-interference control circuit for UAV obstacle avoidance radar communication, including: a filtering module for filtering out signals and interference signals outside the operating frequency band;

[0027] The filtering module includes a transformer T1, an amplifier U1, and an amplifier U2. A resistor R2 and a crystal oscillator X1 are connected in parallel on the input side of the transformer T1. A resistor R1, a capacitor C2, and a resistor R6 are connected in series at the connection point of the transformer T1 and the resistor R2. A diode D1 is connected to the connection point of the resistor R6 and the capacitor C2. A transistor N2 is connected to the connection point of the diode D1 and the capacitor C2. The collector of the transistor N2 is connected to the other end of the resistor R6. A resistor R8 to ground is connected to the emitter of the transistor N2. The base of the transistor N2 is connected to the connection point of the diode D1 and the capacitor C2. The negative terminal of amplifier U1 is connected in series with capacitor C4, resistor R9, and capacitor C3. One end of capacitor C3 is connected to the other end of resistor R6. Resistors R7 and R3 are connected in series at the connection point of capacitor C3 and resistor R6. A capacitor E2 is connected to ground at the connection point of resistors R7 and R3. The positive terminal of amplifier U1 is connected to the other end of resistor R3 through resistor R11. The output terminal of amplifier U1 is connected in series with capacitor C6, resistor R14, and capacitor C7 between it and the negative terminal of amplifier U2. The positive terminal of amplifier U2 is connected to the positive terminal of amplifier U1. The output terminal of amplifier U2 is connected with capacitor C9. One end of capacitor C9 is connected to diode D3. One end of diode D3 is connected to resistor R17. One end of resistor R17 is connected to transistor N3 for connection to the main control module. Crystal oscillator X1 provides stable power. The oscillation frequency is determined by the input signal passing through a series network of resistor R1, capacitor C2, and resistor R6. This network attenuates and filters the input signal. Diode D1, capacitor C2, resistor R6, and transistor N2 form a detector or rectifier circuit to extract the envelope information from the input signal. Amplifier U1, capacitor C4, resistor R9, and capacitor C3 form a filter network to further filter out high-frequency noise and interference. The negative terminal of amplifier U2 is connected to the output terminal of amplifier U1. The signal is transmitted and filtered through a series network of capacitor C6, resistor R14, and capacitor C7. One end of capacitor C9 is connected to diode D3, which acts as a protection or limiting factor to prevent the output signal from being too large and damaging subsequent circuits. Resistor R17 and transistor N3 form an output buffer or drive circuit to improve the stability and driving capability of the output signal.

[0028] An amplification module for amplifying a received weak signal, wherein the input terminal of the amplification module is electrically connected to the output terminal of the filtering module;

[0029] The amplification module includes amplifier U1A and amplifier U1B. A capacitor C17 is connected to the negative terminal of amplifier U1A for connection to the main control module. A capacitor C28 and a resistor R81 are connected between the output terminal of amplifier U1A and the negative terminal of amplifier U1B. A resistor R31, a capacitor C29, and a resistor R41 are connected in parallel to the positive terminal of amplifier U1A. A resistor R51 is connected between the negative terminal of amplifier U1A and its output terminal. A capacitor C27 and a resistor R91 are connected in parallel between the negative terminal and its output terminal of amplifier U1B. A capacitor C23 is connected to the output terminal of amplifier U1B. One end of amplifier U1A is connected to an adjustable resistor W2 and a resistor R77 in series. One end of the adjustable resistor W2 is connected to a transistor N1. A resistor R84 and a capacitor C84 are connected in parallel to the emitter of transistor N1. A resistor R39 and a resistor R46 are connected in series to the collector of transistor N1. One end of resistor R46 is connected to the junction of capacitor C23 and the adjustable resistor W2. Amplifier U1A acts as the first-stage amplifier, initially amplifying the input signal. Amplifier U1B acts as the second-stage amplifier, further amplifying the signal from the first stage. The adjustable resistor W2 and resistor R77 are connected in series at the output terminal to adjust the overall gain of the amplification module. By changing the value of the adjustable resistor W2, the amplification factor can be flexibly adjusted to adapt to input signals of different strengths. Transistor N1 and its surrounding resistors R84, C84, R39, and R46 constitute an output buffer circuit to improve the stability and driving capability of the output signal. This buffer circuit can also reduce interference from the output signal to subsequent circuits.

[0030] A detector module for extracting modulation information from a modulated signal, wherein the input of the detector module is connected to the output of the amplification module;

[0031] The detection module includes a transistor Q201 and an I-type inductor L21. A capacitor C202 and a capacitor to ground C201 are connected in parallel to one end of the I-type inductor L21. One end of the capacitor C202 is connected to the base of the transistor Q201. A resistor R201 is connected to the connection between the base of the transistor Q201 and the capacitor C202. A resistor R202 is connected to the collector of the transistor Q201. One end of the resistor R202 is connected to one end of the resistor R201. A capacitor C203 is connected to the connection between the transistor Q201 and the resistor R202. One end of the capacitor C203 is connected to diodes D201 and D202. One end of diode D201... A capacitor C204 and a resistor R203 are connected in parallel. One end of the resistor R203, one end of the capacitor C204, and one end of the diode D202 are all grounded. The I-type inductor L21, together with the parallel capacitors C201 and C202, forms a filter network to filter out high-frequency noise and spurious waves in the modulated signal, thereby improving the purity of the signal. The transistor Q201 uses its nonlinear characteristics to detect the envelope of the input signal. The envelope is the amplitude information of the modulated signal that changes over time and contains information about the original baseband signal. The low-pass filter composed of resistors R202 and R201 and capacitor C203 smooths the detected signal, removes high-frequency components, and obtains a stable baseband signal.

[0032] A mixing module for mixing the received signal with the local oscillator signal, wherein the output terminal of the detector module is connected to the input terminal of the mixing module;

[0033] The mixer module includes amplifier U3 and amplifier U4. Resistors R305 and R304 are connected in parallel to the negative terminal of amplifier U3. One end of resistor R304 is connected to capacitor C301. One end of capacitor C301 is connected to adjustable resistor R301. One end of resistor R305 is connected to capacitor C302. One end of capacitor C302 is connected to adjustable resistor R302. Resistor R307 is connected to the output terminal of amplifier U3. One end of resistor R307 is connected to the negative terminal of amplifier U4. A capacitor C309 is connected to the output terminal of amplifier U4, and a resistor R309 is connected to one end of capacitor C309. The positive terminal of amplifier U4 is connected to the power supply module, and the positive terminal of amplifier U3 is also connected to the power supply module. Amplifiers U3 and U4 are used as mixers. When the received signal and the local oscillator signal are simultaneously input into the mixer, the frequency of the signal is changed to avoid interference bands, or the signal is transformed to a more easily processed frequency band. The received signal is then mixed with the local oscillator signal to achieve signal frequency transformation.

[0034] The power supply module includes a battery BAT1. A switch S1 is connected to the positive terminal of the battery BAT1. A resistor R311 and a capacitor C304 are connected in parallel to one end of the switch S1. A resistor R310 of the capacitor C303 is connected in parallel to one end of the resistor R311. The connection between the resistor R310 and the resistor R311 is connected to the positive terminal of the amplifier U4. The battery BAT1 provides power to the amplifiers U4 and U3, ensuring the normal operation of the amplifiers U3 and U4.

[0035] An automatic gain control module, wherein the input terminal of the automatic gain control module is connected to the output terminal of the mixer module;

[0036] The automatic gain control module includes an arithmetic unit U32 and an arithmetic unit U31. The positive terminal of the arithmetic unit U31 is connected to a resistor R401 for receiving signals. A resistor R402 is connected between the output terminal and the negative terminal of the arithmetic unit U31. A transistor Q301 is connected to the connection point of the resistor R402 and the negative terminal of the arithmetic unit U31. The output terminal of the arithmetic unit U32 is connected to the base of the transistor Q301. An adjustable resistor R408 is connected to the output terminal of the arithmetic unit U31. A resistor R403 is connected between the negative terminal and the output terminal of U32. A resistor R405 is connected to the positive terminal of the arithmetic unit U32. A resistor R406 and a capacitor C401 are connected in parallel to one end of resistor R405. A capacitor C402, a diode D401, and a resistor R407 are connected in parallel to one end of resistor R406. One end of diode D401 is connected to one end of adjustable resistor R408. One end of resistor R407 and one end of capacitor C402 are both connected to one end of capacitor C401. The terminals of capacitors C401 and C402 are connected to the negative terminal of arithmetic unit U32 via resistor R404. Arithmetic unit U31 acts as the signal input stage, and its positive terminal receives external signals through resistor R401. After processing, the signal outputs a voltage related to the input signal strength. Arithmetic unit U32 acts as the gain adjustment stage. By changing the output voltage of arithmetic unit U32, the conduction level of transistor Q301 can be controlled, thereby adjusting the amplifier gain. When the received signal strength increases, the output voltage of arithmetic unit U31 also increases. This increased voltage is sent to the input terminal of arithmetic unit U32 through the feedback network, causing a change in the output voltage of U32 (i.e., the base voltage of transistor Q301), thereby adjusting the amplifier gain and keeping the output signal at a stable level. Conversely, when the received signal strength decreases, the output voltage of arithmetic unit U31 decreases, and the output voltage of arithmetic unit U32 will also be adjusted accordingly to increase the amplifier gain, thereby maintaining the stability of the output signal.

[0037] The main control module is connected to the control terminals of the filtering module, amplification module, detection module, mixing module and automatic gain control module respectively;

[0038] The main control module includes a control chip U5. A crystal oscillator X4 is connected between pins 26 and 27 of the control chip U5. One end of the crystal oscillator X4 is connected to a capacitor C43 to ground, and the other end of the crystal oscillator X4 is connected to a capacitor C34 to ground. A resistor R144 and a switch SET1 are connected in parallel at pin 20 of the control chip U5. One end of the switch SET1 is connected to a switch SET2, and one end of the switch SET2 is connected to a resistor R64. One end of the resistor R64 is connected to the other end of the resistor R144, and the connection point of the resistor R64 and the switch SET2 is connected to pin 19 of the control chip U5. The control chip U4 is responsible for processing various instructions and data. The crystal oscillator X4 provides a stable clock signal for the control chip. Driven by the clock signal, the control chip U5 begins to execute instructions stored in internal or external memory to control the operation of the entire circuit.

[0039] Through the coordinated operation of filtering, amplification, detection, mixing, automatic gain control, and main control modules, the filtering module removes signals outside the operating frequency band and interference signals. The amplification module then amplifies the received weak signals to increase their strength. The detection module helps identify and separate useful signal components to enhance the UAV's anti-interference capability. The mixing module avoids interference frequency bands by changing the signal frequency. The automatic gain control module allows the UAV to adapt to interference signals of different intensities, ensuring that signals can be correctly received and processed even under strong interference. This effectively improves the UAV's anti-interference capability and ensures safe flight of the UAV in complex electromagnetic environments.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-jamming control circuit for unmanned aerial vehicle obstacle avoidance radar communication, characterized in that: The utility model relates to a weak signal receiver, including: A filter module for filtering signals and interference signals outside the working frequency band; An amplification module for amplifying the received weak signal, the input end of the amplification module is electrically connected with the output end of the filter module; A detection module for extracting modulation information from the modulated signal, the input end of the detection module is connected with the output end of the amplification module; A mixing module for mixing the received signal with the local oscillator signal, the output end of the detection module is connected with the input end of the mixing module; An automatic gain control module, the input end of the automatic gain control module is connected with the output end of the mixing module; A master control module, the master control module is connected with the control end of the filter module, the amplification module, the detection module, the mixing module and the automatic gain control module respectively. 2.The anti-jamming control circuit of a UAV obstacle avoidance radar communication according to claim 1, wherein: The filter module includes transformer T1, amplifier U1 and amplifier U2, the input side of transformer T1 is connected with resistance R2 and crystal oscillator X1 in parallel, the connecting end of transformer T1 and resistance R2 is connected with resistance R1, capacitor C2 and resistance R6 in series, the connecting end of resistance R6 and capacitor C2 is connected with diode D1, the connecting end of diode D1 and capacitor C2 is connected with triode N2, the collector of triode N2 is connected with the other end of resistance R6, the emitter of triode N2 is connected with resistance R8, the base of triode N2 is connected with the connecting end of diode D1 and capacitor C2, the negative end of amplifier U1 is connected with capacitor C4, resistance R9 and capacitor C3 in series, one end of capacitor C3 is connected with the other end of resistance R6, the connecting end of capacitor C3 and resistance R6 is connected with resistance R7 and resistance R3 in series, the connecting end of resistance R7 and resistance R3 is connected with ground capacitor E2, the positive end of amplifier U1 is connected with the other end of resistance R3 through resistance R11, capacitor C6, resistance R14 and capacitor C7 are connected in series between the output end of amplifier U1 and the negative end of amplifier U2, the positive end of amplifier U2 is connected with the positive end of amplifier U1, the output end of amplifier U2 is connected with capacitor C9, one end of capacitor C9 is connected with diode D3, one end of diode D3 is connected with resistance R17, one end of resistance R17 is connected with triode N3 for being connected with the master control module.

3. The anti-jamming control circuit of an unmanned aerial vehicle obstacle avoidance radar communication according to claim 2, characterized in that: The amplification module includes an amplifier U1A and an amplifier U1B, the negative terminal of the amplifier U1A is connected with a capacitor C17 for connecting with the master control module, the output terminal of the amplifier U1A and the negative terminal of the amplifier U1B are connected with a capacitor C28 and a resistor R81, the positive terminal of the amplifier U1A is connected in parallel with a ground resistor R31, a ground capacitor C29 and a resistor R41, the negative terminal of the amplifier U1A and the output terminal are connected with a resistor R51, the negative terminal and the output terminal of the amplifier U1B are connected in parallel with a capacitor C27 and a resistor R91, the output terminal of the amplifier U1B is connected with a capacitor C23, one end of the capacitor C23 is connected with an adjustable resistor W2 and a resistor R77 in series, one end of the adjustable resistor W2 is connected with a triode N1, the emitter of the triode N1 is connected in parallel with a resistor R84 and a capacitor C84, the collector of the triode N1 is connected with a resistor R39 and a resistor R46 in series, one end of the resistor R46 is connected with the connection end of the capacitor C23 and the adjustable resistor W2.

4. The anti-jamming control circuit of a UAV obstacle avoidance radar communication according to claim 3, characterized in that: The detection module includes a triode Q201 and a work-type inductor L21, one end of the work-type inductor L21 is connected in parallel with a capacitor C202 and a ground capacitor C201, one end of the capacitor C202 is connected with the base of the triode Q201, the base of the triode Q201 is connected with a resistor R201 at the connection end of the capacitor C202, the collector of the triode Q201 is connected with a resistor R202, one end of the resistor R202 is connected with one end of the resistor R201, the connection end of the triode Q201 and the resistor R202 is connected with a capacitor C203, one end of the capacitor C203 is connected with a diode D201 and a diode D202, one end of the diode D201 is connected in parallel with a capacitor C204 and a resistor R203, one end of the resistor R203, one end of the capacitor C204 and one end of the diode D202 are grounded.

5. The anti-jamming control circuit of a UAV obstacle avoidance radar communication according to claim 4, characterized in that: The mixing module includes an amplifier U3 and an amplifier U4, the negative terminal of the amplifier U3 is connected in parallel with a resistor R305 and a resistor R304, one end of the resistor R304 is connected with a capacitor C301, one end of the capacitor C301 is connected with an adjustable resistor R301, one end of the resistor R305 is connected with a capacitor C302, one end of the capacitor C302 is connected with an adjustable resistor R302, the output terminal of the amplifier U3 is connected with a resistor R307, one end of the resistor R307 is connected with the negative terminal of the amplifier U4, the output terminal of the amplifier U4 is connected with a capacitor C309, one end of the capacitor C309 is connected with a resistor R309, the positive terminal of the amplifier U4 is connected with the power supply module, and the positive terminal of the amplifier U3 is connected with the power supply module.

6. The anti-jamming control circuit of a UAV obstacle avoidance radar communication according to claim 5, characterized in that: The automatic gain control module comprises an operational amplifier U32 and an operational amplifier U31, a resistor R401 for receiving a signal is connected to the positive terminal of the operational amplifier U31, a resistor R402 is connected between the output terminal of the operational amplifier U31 and the negative terminal, a triode Q301 is connected to the connection terminal of the resistor R402 and the negative terminal of the operational amplifier U31, the output terminal of the operational amplifier U32 is connected to the base of the triode Q301, an adjustable resistor R408 is connected to the output terminal of the operational amplifier U31, a resistor R403 is connected between the negative terminal and the output terminal of the operational amplifier U32, a resistor R405 is connected to the positive terminal of the operational amplifier U32, one end of the resistor R405 is connected in parallel with a resistor R406 and a capacitor C401, one end of the resistor R406 is connected in parallel with a capacitor C402, a diode D401 and a resistor R407, one end of the diode D401 is connected with one end of the adjustable resistor R408, one end of the resistor R407 and one end of the capacitor C402 are both connected with one end of the capacitor C401, and the connection terminals of the capacitor C401 and the capacitor C402 are connected with the negative terminal of the operational amplifier U32 through a resistor R404.

7. The anti-jamming control circuit of a UAV obstacle avoidance radar communication according to claim 6, characterized in that: The main control module comprises a control chip U5, a crystal oscillator X4 is connected between the 26th pin and the 27th pin of the control chip U5, one end of the crystal oscillator X4 is connected with a ground capacitor C43, the other end of the crystal oscillator X4 is connected with a ground capacitor C34, the 20th pin of the control chip U5 is connected in parallel with a resistor R144 and a switch SET1, one end of the switch SET1 is connected with a switch SET2, one end of the switch SET2 is connected with a resistor R64, one end of the resistor R64 is connected with the other end of the resistor R144, and the connection terminal of the resistor R64 and the switch SET2 is connected with the 19th pin of the control chip U5.