A drone link jamming system

Abstract

The utility model discloses a kind of unmanned aerial vehicle link suppression systems, belong to unmanned aerial vehicle prevention and control technical field, the system includes signal detection module, central processing module, multi-band signal generation module, power amplifier module, directional antenna array and power management module, the output end of signal detection module is connected with the first input end of central processing module, the first output end of central processing module is connected with the input end of multi-band signal generation module, the output end of multi-band signal generation module is connected with the first input end of power amplifier module, the output end of power amplifier module is connected with the first input end of directional antenna array, power management module is powered for each module.The utility model can cover multiple unmanned aerial vehicle communication frequency band by multi-band signal generation module, realize signal directional radiation in conjunction with directional antenna array, match the closed-loop control precision regulation power of power amplifier module, significantly improve suppression versatility and accuracy, reduce the interference to peripheral equipment.

Description

Technical Field

[0001] This utility model relates to the field of drone control technology, and in particular to a drone link suppression system. Background Technology

[0002] With the rapid development of drone technology, the number of consumer and industrial drones has increased dramatically. While drones bring convenience to fields such as aerial photography, logistics, and agricultural plant protection, they have also caused a series of security risks, such as unauthorized intrusion into airport airspace affecting flight takeoffs and landings, entering military restricted areas to steal sensitive information, and disrupting order or infringing on privacy at large events. To address these threats, drone link suppression systems have become a core defense device. Their core principle is to emit jamming signals matching the drone's communication frequency band, disrupting signal transmission between the drone and the ground control station, forcing the drone to trigger a return-to-home or forced landing procedure.

[0003] Existing drone link suppression systems have the following technical problems:

[0004] 1. Limited frequency band coverage: Most systems only integrate interference signal generation units for one or two frequency bands, which can only target drones in a specific frequency band such as 2.4GHz or 5.8GHz. They cannot deal with industrial or customized drones using other frequency bands such as 840MHz or 1.5GHz, thus limiting their applicable scenarios.

[0005] 2. Poor control of interference range: The interference signal is generally transmitted by omnidirectional antennas, and the signal energy is spread evenly in all directions, resulting in a short effective suppression distance (usually less than 1km). At the same time, it is easy to interfere with the surrounding civilian communication equipment (such as mobile phone base stations and WiFi routers).

[0006] 3. Inaccurate power control: The open-loop power amplifier structure cannot monitor the output power in real time. This can lead to either insufficient power causing failure to suppress long-range targets or excessive power causing energy waste, resulting in shortened battery life and potentially additional electromagnetic interference.

[0007] Therefore, a new type of UAV link suppression system with wide frequency coverage, strong interference directionality, and precise power control is needed to solve the above-mentioned technical problems. Utility Model Content

[0008] The purpose of this invention is to provide a drone link suppression system to solve the problems of limited coverage frequency bands, poor interference range control, and inaccurate power control in the existing technology. Through modular hardware design and closed-loop control logic, it can achieve precise and low-interference suppression of multi-band drones. It is suitable for scenarios where drone flights need to be restricted, such as airports, military management areas, large event sites, and border lines.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A UAV link suppression system includes a signal detection module, a central processing module, a multi-band signal generation module, a power amplification module, a directional antenna array, and a power management module.

[0011] The output of the signal detection module is connected to the first input of the central processing module. The first output of the central processing module is connected to the input of the multi-band signal generation module. The output of the multi-band signal generation module is connected to the first input of the power amplifier module. The output of the power amplifier module is connected to the first input of the directional antenna array. The power management module is connected to the signal detection module, the central processing module, the multi-band signal generation module, and the power amplifier module respectively and provides power support.

[0012] Preferably, the power amplifier module further has a feedback signal output terminal and a second input terminal, and the central processing module further has a second input terminal and a second output terminal. The feedback signal output terminal of the power amplifier module is connected to the second input terminal of the central processing module, and the second output terminal of the central processing module is connected to the second input terminal of the power amplifier module.

[0013] Preferably, the central processing module includes a main control chip, a data storage unit, a clock circuit, and a communication interface circuit, wherein the main control chip is bidirectionally connected to the data storage unit, the clock circuit, and the communication interface circuit.

[0014] Preferably, the signal detection module includes a spectrum analysis circuit, a signal strength detection circuit, and a drone identification circuit, and the output terminals of the spectrum analysis circuit, the signal strength detection circuit, and the drone identification circuit are respectively connected to the first input terminal of the central processing module.

[0015] Preferably, the multi-band signal generation module includes multiple independent signal generator circuits, each corresponding to a different UAV communication frequency band. The input terminal of each signal generator circuit is connected to the first output terminal of the central processing module, and the output terminal of each signal generator circuit is connected to the first input terminal of the power amplifier module.

[0016] Preferably, the signal generator circuit includes a frequency synthesizer, a waveform generator, and a modulation circuit. The input terminal of the frequency synthesizer is connected to the first output terminal of the central processing module, the output terminal of the frequency synthesizer is connected to the input terminal of the waveform generator, the output terminal of the waveform generator is connected to the input terminal of the modulation circuit, and the output terminal of the modulation circuit is connected to the first input terminal of the power amplifier module.

[0017] Preferably, the power amplification module includes a multi-stage amplification circuit, a power detection circuit, and a gain control circuit. The input terminal of the multi-stage amplification circuit serves as the first input terminal of the power amplification module and is connected to the output terminal of the multi-band signal generation module. The output terminal of the multi-stage amplification circuit is connected to the input terminal of the power detection circuit and the first input terminal of the directional antenna array, respectively. The output terminal of the power detection circuit serves as the feedback signal output terminal of the power amplification module and is connected to the second input terminal of the central processing module. The input terminal of the gain control circuit serves as the second input terminal of the power amplification module and is connected to the second output terminal of the central processing module. The output terminal of the gain control circuit is connected to the multi-stage amplification circuit.

[0018] Preferably, the directional antenna array includes at least four antenna elements, a driving gimbal, an angle adjustment driving circuit, and a beamforming circuit. The at least four antenna elements are mounted on the driving gimbal. The input terminal of the beamforming circuit serves as the first input terminal of the directional antenna array and is connected to the output terminal of a multi-stage amplifier circuit. The output terminal of the beamforming circuit is connected to the input terminal of each antenna element. The input terminal of the angle adjustment driving circuit is connected to the third output terminal of the central processing module. The output terminal of the angle adjustment driving circuit is connected to the input terminal of the driving gimbal to drive the driving gimbal to adjust the direction of each antenna element.

[0019] Preferably, the beamforming circuit includes a phase shifter array and a signal synthesizer. Each antenna element corresponds to one phase shifter. The output terminal of each phase shifter is connected to the input terminal of the signal synthesizer. The output terminal of the signal synthesizer is connected to the input terminal of each antenna element. The control terminal of each phase shifter is connected to the fourth output terminal of the central processing module.

[0020] Preferably, the power management module includes a main power supply, a backup power supply, a power switching circuit, and multiple voltage regulation circuits. The main power supply and the backup power supply are connected to each voltage regulation circuit through the power switching circuit. Each voltage regulation circuit has a different output voltage and provides power at the corresponding voltage to the signal detection module, the central processing module, the multi-band signal generation module, the power amplification module, and the directional antenna array.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. Employing a multi-band signal generation module, it can simultaneously cover multiple commonly used communication frequency bands for drones, enabling it to handle different types of drones and improving the system's versatility;

[0023] 2. By using a directional antenna array in conjunction with beamforming technology, the suppression signal is transmitted in a directional manner, which improves signal utilization, increases the suppression distance, and significantly reduces interference to electronic equipment in non-target directions.

[0024] 3. The power amplifier module adopts a closed-loop control design, which can automatically adjust the output power according to the target distance and signal strength, ensuring the suppression effect while avoiding power waste and unnecessary interference.

[0025] 4. The signal detection module integrates spectrum analysis, signal strength detection, and UAV type recognition, significantly improving target recognition capabilities in complex electromagnetic environments;

[0026] 5. Redundant power supply, high reliability: Seamless switching between main and backup power supplies effectively improves the stability of continuous system operation and meets the needs of long-term on-call scenarios.

[0027] 6. The modules work together efficiently through optimized circuit connections, which improves the system's response speed and significantly shortens the time from detecting the drone to effectively suppressing it;

[0028] 7. The system adopts a modular hardware design, with each functional module being relatively independent, which facilitates maintenance and upgrades and improves system reliability. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the UAV link suppression system in one embodiment of the present invention. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] In the embodiments provided by this utility model, it should be understood that the disclosed methods and systems can be implemented in other ways. The system embodiments described below are merely illustrative. For example, the division of units and modules is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or modules can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, and can be electrical, mechanical, or other forms.

[0033] In addition, each functional unit in the various embodiments of this utility model can be integrated into a single processor, or each unit can be a separate device, or two or more units can be integrated into a single device; each functional unit in the various embodiments of this utility model can be implemented in hardware or in the form of hardware plus software functional units.

[0034] Those skilled in the art will understand that all or part of the steps of the following method embodiments can be implemented by program instructions and related hardware. The aforementioned program instructions can be stored in a computer-readable storage medium. When the program instructions are executed, they perform the steps of the following method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), magnetic disks, or optical disks.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0036] like Figure 1 As shown in the figure, this utility model embodiment provides a UAV link suppression system, which includes a signal detection module 1, a central processing module 2, a multi-band signal generation module 3, a power amplification module 4, a directional antenna array 5, and a power management module 6.

[0037] The output of the signal detection module 1 is connected to the first input of the central processing module 2. The first output of the central processing module 2 is connected to the input of the multi-band signal generation module 3. The output of the multi-band signal generation module 3 is connected to the first input of the power amplifier module 4. The output of the power amplifier module 4 is connected to the first input of the directional antenna array 5. The power management module 6 is connected to the signal detection module 1, the central processing module 2, the multi-band signal generation module 3, and the power amplifier module 4 respectively and provides power support.

[0038] The working principle of the UAV link suppression system in this embodiment of the invention is as follows:

[0039] When in use, the system power is turned on, and the signal detection module 1 captures the UAV communication signal in real time and transmits it to the central processing module 2. The central processing module 2 issues a suppression command to the multi-band signal generation module 3 according to the signal characteristics of the UAV communication signal. The multi-band signal generation module 3 generates a suppression signal of the corresponding frequency band according to the suppression command. After being enhanced by the power amplification module 4, the suppression signal is directionally emitted as a specific frequency of interference electromagnetic waves through the directional antenna array 5, thereby suppressing the UAV communication link.

[0040] The UAV link suppression system of this embodiment covers multiple UAV communication frequency bands through a multi-band signal generation module 3, achieves directional signal radiation by combining a directional antenna array 5, and enhances and adjusts the power of weak suppression signals by a power amplification module 4, which significantly improves the versatility and accuracy of UAV link suppression and reduces interference to surrounding equipment.

[0041] In one embodiment, the power amplifier module 4 further has a feedback signal output terminal and a second input terminal, and the central processing module 2 further has a second input terminal and a second output terminal. The feedback signal output terminal of the power amplifier module 4 is connected to the second input terminal of the central processing module 2, and the second output terminal of the central processing module 2 is connected to the second input terminal of the power amplifier module 4.

[0042] In this embodiment, the power amplifier module 4 inputs a power feedback signal to the second input terminal of the central processing module 2 through the feedback signal output terminal, so that the central processing module 2 can adjust the control signal of the power amplifier module 4 according to the feedback signal, realize the closed-loop control of the power amplifier module 4, and thus ensure the precise adjustment of power.

[0043] In one embodiment, the central processing module 2 includes a main control chip 21, a data storage unit 22, a clock circuit 23, and a communication interface circuit 24. The main control chip 21 is bidirectionally connected to the data storage unit 22, the clock circuit 23, and the communication interface circuit 24, respectively.

[0044] Specifically, in this embodiment, the main control chip 21 is an STM32H743 (200MHz main frequency, 200MIPS computing power); the data storage unit 22 is a W9825G6KH (128MB SDRAM) + W25Q128JV (128MB Flash); the clock circuit 23 is a TXCO (10MHz, stability ±0.1ppm); and the communication interface circuit 24 is a USB3.0 (VL813) + Gigabit Ethernet (LAN8720) + RS485 (MAX485).

[0045] The data storage unit 22 stores the drone signal feature library (including the frequency, modulation method, and frequency hopping rules of mainstream drone brands such as DJI and XAG) and system parameters (such as the threshold and default power of each module) in Flash memory. SDRAM serves as a real-time data cache, storing the raw data and power feedback data of the signal detection module 1. The clock circuit 23 provides a 10MHz reference clock, which, after being multiplied by the PLL inside the main control chip 21, provides a synchronous clock for the signal detection module 1 and the multi-band signal generation module 3, ensuring that the timing error of each module's signal is ≤10μs, thus avoiding suppression failure caused by frequency offset. The main control chip 21 adopts the RT-Thread real-time operating system. The communication interface circuit 24 realizes multi-path data interaction: USB 3.0 is used for local parameter configuration and log export, Gigabit Ethernet can be used to connect to the remote control center, and RS485 can be used to interface with external sensors (such as radar). The rich communication interfaces enhance the system's scalability and can be linked with radar, video surveillance, and other equipment to form an integrated "detection-identification-suppression" prevention and control system.

[0046] In one embodiment, the signal detection module 1 includes a spectrum analysis circuit 11, a signal strength detection circuit 12, and a drone identification circuit 13. The output terminals of the spectrum analysis circuit 11, the signal strength detection circuit 12, and the drone identification circuit 13 are respectively connected to the first input terminal of the central processing module 2.

[0047] Specifically, in this embodiment, the spectrum analysis circuit 11 uses AD9361 (300MHz-6GHz, 12-bit ADC, sampling rate 200MSPS); the signal strength detection circuit 12 uses AD8318 (-80dBm to +20dBm, accuracy ±1dB); and the drone identification circuit 13 uses TMS320C6748 (floating-point DSP, 1GHz main frequency).

[0048] The spectrum analyzer circuit uses the superheterodyne receiver principle to perform frequency sweep analysis in the 300MHz-6GHz frequency band to identify the UAV communication frequency; the signal strength detection circuit 12 uses logarithmic detection technology to convert the radio frequency signal strength into a DC voltage signal; the UAV identification circuit 13 uses a dedicated digital signal processing chip to perform feature matching on the signal modulation mode and frequency hopping pattern. The detection data from these three circuits are transmitted in parallel to the central processing module 2 for analysis, realizing multi-dimensional and accurate identification of UAV signals. Compared with traditional single detection circuits, this significantly improves the target identification capability in complex electromagnetic environments.

[0049] In one embodiment, the multi-band signal generation module 3 includes multiple independent signal generator circuits 31, each corresponding to a different UAV communication frequency band. The input terminal of each signal generator circuit 31 is connected to the first output terminal of the central processing module 2, and the output terminal of each signal generator circuit 31 is connected to the first input terminal of the power amplifier module 4.

[0050] The multi-band signal generation module 3, by setting up multiple independent signal generator circuits 31, can support single-band or simultaneous suppression of multiple bands, thus addressing scenarios of multiple drone swarms flying illegally. Compared to single-band systems, its multi-target processing capability is greatly improved. Specifically, in this embodiment, the multi-band signal generation module 3 contains four independent signal generator circuits 31, corresponding to the 840MHz, 1.5GHz, 2.4GHz, and 5.8GHz bands respectively, thereby covering commonly used communication frequency bands for drones, overcoming the limitations of traditional single-band systems, and expanding the applicable scenarios to the prevention and control of all types of drones.

[0051] In one embodiment, the signal generator circuit 31 includes a frequency synthesizer 311, a waveform generator 312, and a modulation circuit 313. The input terminal of the frequency synthesizer 311 is connected to the first output terminal of the central processing module 2, the output terminal of the frequency synthesizer 311 is connected to the input terminal of the waveform generator 312, the output terminal of the waveform generator 312 is connected to the input terminal of the modulation circuit 313, and the output terminal of the modulation circuit 313 is connected to the first input terminal of the power amplifier module 4.

[0052] Specifically, in this embodiment, the frequency synthesizer 311 uses an ADF4351 chip to generate a carrier signal with an accuracy of ±0.1ppm; the waveform generator 312 uses an AD9833 to output AM / FM / FSK and other modulated waveforms; and the modulation circuit 313 uses an AD8345 to synthesize the carrier and modulated waveforms into an original suppressed signal, which is then output to the power amplifier module 4.

[0053] Based on the results from the signal detection module 1 (e.g., "The UAV is operating in the 2.4GHz band, FSK modulation"), the central processing module 2 sends a command to the 2.4GHz band signal generator circuit 31 via the SPI bus. The frequency synthesizer 311 (ADF4351) receives the frequency control word and generates a 2.412GHz carrier signal (stability ±0.1ppm). The waveform generator 312 (AD9833) receives the waveform control command and outputs a 100kHz FSK modulated waveform (frequency deviation 50kHz). The modulation circuit 313 (AD8345) combines the carrier wave from ADF4351 with the modulation waveform from AD9833 to generate the original FSK modulated suppression signal (amplitude 0.5Vpp), which is then output to the power amplifier module 4.

[0054] If multiple drones on different frequency bands (such as 2.4GHz and 5.8GHz) are detected, the central processing module 2 simultaneously sends instructions to the signal generator circuits 31 of the two frequency bands. The two original signals are then amplified by the power amplifier module 4 and radiated simultaneously through the directional antenna array 5 to achieve multi-target suppression.

[0055] In one embodiment, the power amplifier module 4 includes a multi-stage amplifier circuit 41, a power detection circuit 42, and a gain control circuit 43. The input terminal of the multi-stage amplifier circuit 41 is connected to the output terminal of the multi-band signal generation module 3 as the first input terminal of the power amplifier module 4. The output terminal of the multi-stage amplifier circuit 41 is connected to the input terminal of the power detection circuit 42 and the first input terminal of the directional antenna array 5, respectively. The output terminal of the power detection circuit 42 is connected to the second input terminal of the central processing module 2 as the feedback signal output terminal of the power amplifier module 4. The input terminal of the gain control circuit 43 is connected to the second output terminal of the central processing module 2 as the second input terminal of the power amplifier module 4. The output terminal of the gain control circuit 43 is connected to the multi-stage amplifier circuit 41.

[0056] Specifically, in this embodiment, the multi-stage amplifier circuit 41 adopts a three-stage architecture of preamplifier (using ADL5565) + driver amplifier (using MRF6S21140) + final stage power amplifier (using MRF1K05H) to achieve 1W-50W power output; the power detection circuit 42 adopts Mini-Circuits directional coupler (coupling degree 20dB) + AD8361 power detector; the gain control circuit 43 adopts AD5293 digital potentiometer.

[0057] The original suppressed signal output from the multi-band signal generation module 3 is input to the multi-stage amplifier circuit 41. After three stages of amplification, it outputs a high-power signal of 1W-50W. The directional coupler of the power detection circuit 42 couples the signal attenuated by 20dB from the output signal and transmits it to the AD8361 power detector. The power detector converts the RF power into a 0-3V DC voltage signal (corresponding to 1W-50W). The DC voltage signal is transmitted to the ADC interface of the central processing module 2. The main control chip 21 converts it into an actual power value and compares it with the preset target power (calculated based on the distance and signal strength of the UAV, such as 20W for a 2km target) (comparison by the comparator of the main control chip 21). If the actual power is lower than the target value, the central processing module 2 sends a command to the gain control circuit 43 (AD5293) through the SPI interface to increase the resistance of the digital potentiometer, increase the bias voltage of the multi-stage amplifier circuit 41, and improve the amplification gain. If the actual power is higher than the target value, the resistance is decreased to reduce the gain, forming a closed-loop control.

[0058] With the above-described closed-loop power amplifier circuit structure, the power control accuracy is greatly increased compared to the open-loop amplifier structure, the stability of the suppressed signal power is significantly improved, energy waste caused by excess power can be effectively avoided, and the power supply life is effectively improved.

[0059] In one embodiment, the directional antenna array 5 includes at least four antenna elements 51, a driving gimbal 52, an angle adjustment driving circuit 53, and a beamforming circuit 54. The at least four antenna elements 51 are mounted on the driving gimbal 52. The input terminal of the beamforming circuit 54 serves as the first input terminal of the directional antenna array 5 and is connected to the output terminal of the multi-stage amplifier circuit 41. The output terminal of the beamforming circuit 54 is connected to the input terminal of each antenna element 51. The input terminal of the angle adjustment driving circuit 53 is connected to the third output terminal of the central processing module 2. The output terminal of the angle adjustment driving circuit 53 is connected to the input terminal of the driving gimbal 52 to drive the driving gimbal 52 to adjust the direction of each antenna element 51.

[0060] The beamforming circuit 54 includes a phase shifter array and a signal synthesizer. Each antenna element 51 corresponds to a phase shifter. The output terminal of each phase shifter is connected to the input terminal of the signal synthesizer. The output terminal of the signal synthesizer is connected to the input terminal of each antenna element 51. The control terminal of each phase shifter is connected to the fourth output terminal of the central processing module 2.

[0061] Specifically, in this embodiment, the directional antenna array 5 includes 4 antenna elements 51. The 4 antenna elements 51 adopt a microstrip array design. Each antenna element 51 corresponds to an independent phase shifter (using HMC649). The signal synthesizer adopts a Wilkinson signal synthesizer. The angle adjustment drive circuit 53 adopts a ULN2003 driver chip. The drive component of the drive gimbal 52 adopts a 28BYJ-48 stepper motor.

[0062] Based on the UAV's estimated azimuth (e.g., 30° horizontal, 10° pitch) from the signal detection module 1, the central processing module 2 sends a command to the angle adjustment drive circuit 53. The ULN2003 driver chip of the angle adjustment drive circuit 53 drives the gimbal 52 to obtain a stepper motor, causing the gimbal 52 to rotate horizontally to 30°±5° and pitch to 10°±5°, achieving "coarse aiming". Based on the UAV's precise azimuth (e.g., 30.5° horizontal, 10.2° pitch), the central processing module 2 sends a command to the HMC649 phase shifter. The array transmits phase control words: the four phase shifters are adjusted to 0°, 15°, 30°, and 45° respectively, so that the signals radiated by each antenna element 51 form constructive interference in the 30.5° / 10.2° direction and destructive interference in other directions, achieving "fine aiming"; the signal synthesizer combines the signals output by the four phase shifters and distributes them to the four microstrip antenna elements 51 to radiate directional electromagnetic waves; if the UAV moves (e.g., the horizontal angle changes from 30.5° to 35°), the central processing module 2 updates the stepper motor angle and the phase shifter phase in real time to achieve dynamic tracking.

[0063] In this embodiment, the directional antenna array 5 adopts a combination of mechanical coarse aiming and electronic fine aiming, which greatly reduces the beam pointing accuracy compared to pure mechanical adjustment error; the directional gain of the 4-element antenna array significantly improves the effective suppression distance compared to omnidirectional antennas; the beam half-power angle is controlled within a small range, effectively reducing the interference signal strength in non-target directions, and better avoiding interference to civilian WiFi devices outside the preset range.

[0064] In one embodiment, the power management module 6 includes a main power supply 61, a backup power supply 62, a power switching circuit 63, and multiple voltage regulation circuits 64. The main power supply 61 and the backup power supply 62 are connected to each voltage regulation circuit 64 through the power switching circuit 63. Each voltage regulation circuit 64 outputs a different voltage, and each voltage regulation circuit 64 provides power at the corresponding voltage to the signal detection module 1, the central processing module 2, the multi-band signal generation module 3, the power amplification module 4, and the directional antenna array 5.

[0065] In this embodiment, the main power supply 61 uses a 24V / 50Ah lithium battery pack, and the backup power supply 62 uses a 12V / 20Ah lithium battery. The power switching circuit 63 monitors the voltage of the main power supply 61 through a comparator. When the voltage of the main power supply 61 is lower than the threshold (19V), it automatically switches to the backup power supply 62 within 10ms. The voltage regulation circuit 64 uses a DC-DC converter chip to output different voltages such as 3.3V (digital circuit), 5V (control circuit), 12V (drive circuit) and 24V (power circuit) to power each module.

[0066] In this embodiment, the power management module 6 achieves seamless power switching through dual power redundancy, ensuring that the system does not stop working when the main power supply 61 fails, and the backup power supply 62 can maintain core functions for more than 30 minutes; independent power supply for each module avoids power interference and improves the stability of circuit operation.

[0067] In one embodiment, the system integrates all the above modules, and is equipped with a 5-inch TFT display screen (for human-computer interaction) and an EC204G module (for remote control).

[0068] After the system is powered on, the power management module 6 supplies power to all modules, the central processing module 2 initializes parameters (loads the drone feature library, sets the power threshold), and the signal detection module 1 begins frequency scanning detection. When a 2.4GHz band drone is detected (signal strength -60dBm, identified as a DJI Mavic 3), the signal detection module 1 transmits the data to the central processing module 2. The central processing module 2 calculates the target distance (approximately 2km), determines the target power (20W), and sends a signal of "2.4GHz, FSK modulation, 0.5" to the multi-band signal generation module 3. The Vpp command sends a "target power 20W" command to the power amplifier module 4 and a "horizontal 30°, elevation 10°" command to the directional antenna array 5. The multi-band signal generation module 3 generates the original suppression signal, which is amplified to 20W by the power amplifier module 4 and radiated directionally through the directional antenna array 5. The power detection circuit 42 provides real-time feedback of the power (e.g., 19.8W), and the central processing module 2 fine-tunes the gain to stabilize the power at 20W ± 0.1W. The remote control center receives the system status (suppression frequency band, power, target azimuth) in real time through the 4G module.

[0069] The system in this embodiment achieves full automation of the "detection-identification-decision-suppression-feedback" process without human intervention, making it suitable for unattended scenarios. The remote monitoring function supports control and status viewing from 10 kilometers away, and operators do not need to approach dangerous areas (such as border lines), thus improving safety.

[0070] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0071] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0072] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly using hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0073] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A UAV link suppression system, characterized in that, It includes a signal detection module, a central processing module, a multi-band signal generation module, a power amplification module, a directional antenna array, and a power management module. The output of the signal detection module is connected to the first input of the central processing module. The first output of the central processing module is connected to the input of the multi-band signal generation module. The output of the multi-band signal generation module is connected to the first input of the power amplifier module. The output of the power amplifier module is connected to the first input of the directional antenna array. The power management module is connected to the signal detection module, the central processing module, the multi-band signal generation module, and the power amplifier module respectively and provides power support.

2. The UAV link suppression system according to claim 1, characterized in that, The power amplifier module also has a feedback signal output terminal and a second input terminal, and the central processing module also has a second input terminal and a second output terminal. The feedback signal output terminal of the power amplifier module is connected to the second input terminal of the central processing module, and the second output terminal of the central processing module is connected to the second input terminal of the power amplifier module.

3. The UAV link suppression system according to claim 1, characterized in that, The central processing module includes a main control chip, a data storage unit, a clock circuit, and a communication interface circuit. The main control chip is bidirectionally connected to the data storage unit, the clock circuit, and the communication interface circuit.

4. The UAV link suppression system according to claim 1, characterized in that, The signal detection module includes a spectrum analysis circuit, a signal strength detection circuit, and a drone identification circuit. The output terminals of the spectrum analysis circuit, the signal strength detection circuit, and the drone identification circuit are respectively connected to the first input terminal of the central processing module.

5. The UAV link suppression system according to claim 1, characterized in that, The multi-band signal generation module includes multiple independent signal generator circuits, each corresponding to a different UAV communication frequency band. The input terminal of each signal generator circuit is connected to the first output terminal of the central processing module, and the output terminal of each signal generator circuit is connected to the first input terminal of the power amplifier module.

6. The UAV link suppression system according to claim 5, characterized in that, The signal generator circuit includes a frequency synthesizer, a waveform generator, and a modulation circuit. The input terminal of the frequency synthesizer is connected to the first output terminal of the central processing module, the output terminal of the frequency synthesizer is connected to the input terminal of the waveform generator, the output terminal of the waveform generator is connected to the input terminal of the modulation circuit, and the output terminal of the modulation circuit is connected to the first input terminal of the power amplifier module.

7. The UAV link suppression system according to claim 2, characterized in that, The power amplifier module includes a multi-stage amplifier circuit, a power detection circuit, and a gain control circuit. The input terminal of the multi-stage amplifier circuit serves as the first input terminal of the power amplifier module and is connected to the output terminal of the multi-band signal generation module. The output terminal of the multi-stage amplifier circuit is connected to the input terminal of the power detection circuit and the first input terminal of the directional antenna array, respectively. The output terminal of the power detection circuit serves as the feedback signal output terminal of the power amplifier module and is connected to the second input terminal of the central processing module. The input terminal of the gain control circuit serves as the second input terminal of the power amplifier module and is connected to the second output terminal of the central processing module. The output terminal of the gain control circuit is connected to the multi-stage amplifier circuit.

8. The UAV link suppression system according to claim 7, characterized in that, The directional antenna array includes at least four antenna elements, a driving gimbal, an angle adjustment driving circuit, and a beamforming circuit. The at least four antenna elements are mounted on the driving gimbal. The input terminal of the beamforming circuit serves as the first input terminal of the directional antenna array and is connected to the output terminal of a multi-stage amplifier circuit. The output terminal of the beamforming circuit is connected to the input terminal of each antenna element. The input terminal of the angle adjustment driving circuit is connected to the third output terminal of a central processing module. The output terminal of the angle adjustment driving circuit is connected to the input terminal of the driving gimbal to drive the driving gimbal to adjust the direction of each antenna element.

9. The UAV link suppression system according to claim 8, characterized in that, The beamforming circuit includes a phase shifter array and a signal synthesizer. Each antenna element corresponds to one phase shifter. The output of each phase shifter is connected to the input of the signal synthesizer. The output of the signal synthesizer is connected to the input of each antenna element. The control terminal of each phase shifter is connected to the fourth output of the central processing module.

10. The UAV link suppression system according to any one of claims 1-9, characterized in that, The power management module includes a main power supply, a backup power supply, a power switching circuit, and multiple voltage regulation circuits. The main power supply and the backup power supply are connected to each voltage regulation circuit through the power switching circuit. Each voltage regulation circuit has a different output voltage and provides power at the corresponding voltage to the signal detection module, the central processing module, the multi-band signal generation module, the power amplification module, and the directional antenna array.

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