Lightweight tile type unmanned aerial vehicle interference load

Abstract

A lightweight tile type unmanned aerial vehicle interference load comprises a platform frame, a digital interference source, a power supply module, a frequency conversion module, a transmitting front end and an antenna module. The interference load adopts an open tile type architecture design, and has the following characteristics: each module can be flexibly replaced and combined to realize function reconstruction; the direction of the generated electromagnetic beam can be adjusted to air or ground; through the passive air cooling heat dissipation design, the passive heat dissipation capability is achieved; adaptive interference waveforms can be generated according to different combat scenes, and the method has an autonomous decision-making capability.

Description

Technical Field

[0001] The present invention belongs to the technical field of front-end integration of unmanned aerial vehicle systems, and specifically is a lightweight tile-type unmanned aerial vehicle interference load. Background Art

[0002] In the modern electronic information battlefield, the electronic jamming payload carried by drones uses jamming patterns such as forwarding, suppression, and deception to emit jamming signals to enemy radars, forming the amplitude and distance of false targets, blinding enemy detection. As a new payload platform, drones are constantly refreshing combat methods: from large drones carrying strong single-machine payloads to light and small drones for joint confrontation.

[0003] In order to achieve continuous suppression of electronic equipment such as radar, communications, and reconnaissance, drones are required to be able to perform networked combined relay jamming, which requires the jamming payload to be lightweight and small, and the jamming efficiency to be complementary. Existing large-scale airborne jamming equipment has the characteristics of full-band jamming and high-power transmission channels, which leads to a significant increase in load power consumption, cost, and volume, and cannot be converted to small drone platforms for use, such as the patent number CN219181946 of "A Support Jamming System and Airborne Multi-Band Jamming Equipment".

[0004] Therefore, there is a need for a lightweight and compact UAV platform jamming payload with complementary jamming effectiveness. Summary of the invention

[0005] The present invention proposes a lightweight tile-type UAV interference load.

[0006] The technical solution to achieve the purpose of the present invention is: a lightweight tile-type UAV interference load, comprising:

[0007] A platform frame, a digital interference source, a power module, a frequency conversion module, a transmitting front end, and an antenna module. The digital interference source, the power module, the frequency conversion module, the transmitting front end, and the antenna module are all arranged on the platform frame. The digital interference source is used to generate interference basebands of different styles according to received instructions. The frequency conversion module is used to generate a reference clock and a local oscillator signal, and convert the interference baseband into a radio frequency signal and distribute it to the transmitting front end. The transmitting front end is used to perform amplitude and phase modulation and power amplification on the radio frequency signal. The antenna module is used to transmit the radio frequency signal output by the transmitting front end into free space.

[0008] Preferably, in the deception interference mode, the digital interference source uses the UAV communication link to receive the target radar characteristic information sent by the main control, and adjusts the delay and frequency shift to generate a deception interference baseband; in the suppression interference mode, the digital interference source generates a suppression interference baseband internally, and uses broadband noise interference to compress the working distance of the enemy radar.

[0009] Preferably, the transmitting front end includes four transmitting components, each transmitting component includes a metal frame, and an amplitude and phase modulation chip and a power amplifier chip arranged in the cavity of the metal frame, each group of transmitting components uses one SSMP connector to connect the input signal to the amplitude and phase modulation chip, and each group of transmitting components uses two SSMP connectors to connect the two polarized signals output by the power amplifier chip to the antenna module.

[0010] Preferably, the metal frame has two cavities inside, in which the amplitude and phase modulation chip and the power amplifier chip are placed respectively, and the amplitude and phase modulation chip and the power amplifier chip are interconnected through a built-in elastic connector.

[0011] Preferably, heat dissipation ducts are provided on both sides of the emitting component, and heat dissipation fins are provided in the heat dissipation ducts.

[0012] Preferably, the antenna module adopts a dual-polarized antenna.

[0013] Preferably, the antenna module is installed at the bottom of the drone through a platform frame, and there is a certain downward inclination angle between the radiation normal line of the antenna module and the horizontal line of the platform frame.

[0014] Preferably, the dual-polarized antenna uses engineering plastics with metal electroplated on the surface to form an antenna reflection cavity, a cable at the bottom of the antenna reflection cavity is connected to a printed circuit board radiation unit at the top, and an embedded SMP interface is used at the bottom of the antenna reflection cavity as an antenna feeding interface.

[0015] Compared with the prior art, the present invention has the following significant advantages: (1) The present invention adopts a tile-type architecture, and can upgrade and replace various modules according to different combat requirements to achieve functional reconstruction of the interference payload. (2) The present invention has an electromagnetic beam control function, which can be adjusted to point to air or ground operation, and can be adjusted to an electromagnetic beam of any polarization according to the combat target. (3) The present invention has passive heat dissipation capability through passive air cooling design. (4) The present invention can generate adaptive interference waveforms according to different combat scenarios through the embedded digital core system in the digital interference source, and has autonomous decision-making capabilities. (5) The present invention has a lightweight design while having multiple interference functions, and is suitable for small UAV platforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 . is a block diagram of the working principle of the present invention.

[0017] Figure 2 . is a cross-sectional schematic diagram of the launch assembly of the present invention.

[0018] Figure 3 . is a structural diagram of the launch assembly of the present invention.

[0019] Figure 4 . is a structural diagram of the interference load of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] A lightweight tile-type UAV jamming payload includes a platform frame, a digital jammer, a power module, a frequency conversion module, a transmitting front end, and an antenna module.

[0022] The working process of the jamming payload system is as follows: first, the air interface communication link of the UAV platform receives the data information transmitted by the reconnaissance platform, and extracts the jamming command information and digital intermediate frequency information through decoding. The digital jammer generates different styles of jamming basebands according to the received commands. In the deception jamming mode, the digital jammer uses the UAV communication link to receive the target radar characteristic information sent by the main control, and adjusts the delay and frequency shift to generate a deception jamming baseband. In the suppression jamming mode, the digital jammer generates a suppression jamming baseband internally, and uses broadband noise interference to compress the working distance of the enemy radar. The frequency conversion module generates a reference clock and local oscillator signal internally, which can convert the jamming baseband into a radio frequency signal. The frequency conversion module distributes the radio frequency signal to the transmitting front end. After phase modulation, the transmitting front end amplifies the signal and transmits it into free space through the antenna module connected to the top. According to the phased array principle, the phase-modulated electromagnetic signal can form a specified electromagnetic beam in space. The working principle is as follows: Figure 1 shown.

[0023] Digital jammers mainly include central processing units, memory, interface chips, high-speed digital-to-analog converters (D / A), etc. The arrangement is mainly centered on the central processing unit, which is connected to other functional chips. The interface chip is responsible for docking with the drone communication interface to receive jamming instructions, and then sends them to the central processing unit after caching; the memory contains preset jamming information, which can be called by the central processing unit at any time. The central processing unit is generally implemented using a high-speed FPGA, which can generate a digital jamming baseband and send it to a high-speed digital-to-analog converter to generate an intermediate frequency jamming baseband. In the deception jamming mode, the communication link of the drone platform is used to receive the digital intermediate frequency information transmitted by the main control, and the signal delay and frequency shift are adjusted to achieve effective jamming of the radar system. In the suppression jamming mode, the digital jammer generates a suppression jamming baseband internally, and uses broadband noise jamming to compress the working distance of the enemy radar.

[0024] The digital interference source can also cooperate to control the interference electromagnetic beam. According to the instructions received by the interface chip, the central processor calls the beam pointing data in the memory and sends it to the RF front end. The RF signal phase shift is adjusted by the RF front end. After the antenna module is transmitted, a directional electromagnetic beam is generated in the free space, which plays the role of beam control.

[0025] The digital interference source has an embedded digital core system, which can take artificial intelligence autonomous decision-making and execute task processes in emergency situations such as data link loss, real-time threats and complex failures where the main station control cannot intervene in real time.

[0026] The frequency conversion module is used to convert the interference baseband generated by the digital interference source to generate an RF signal. The frequency conversion module has a built-in clock source, which can generate the local oscillator signal required for frequency conversion and provide an additional clock signal for the digital interference source. The frequency conversion module uses a highly stable constant temperature crystal oscillator as the reference clock, and generates the RF local oscillator and clock through phase locking.

[0027] The transmitting front end mainly includes four transmitting components and heat dissipation ducts. The transmitting components include power amplifier chips, amplitude and phase modulation chips and metal frames, SMP connectors, top cover plates and bottom cover plates. The function of the transmitting front end is to phase modulate the RF signal through the amplitude and phase modulation chip, and the power amplifier chip amplifies the signal and then outputs it. Other parts provide packaging shells and interface functions. In order to achieve lightweight design, an I-shaped metal frame is used inside the transmitting component, which is divided into two upper and lower cavities. The lower cavity is used to place the amplitude and phase modulation chip, and the upper cavity is used to place the power amplifier chip. The upper and lower cavities are interconnected through the elastic connector built into the frame. The transmitting component uses one SSMP connector for input from the bottom; two SSMP connectors are used for two outputs at the top. The input corresponds to the frequency conversion module, and the output corresponds to the two polarization inputs of the antenna module radiation unit. The RF front end has a total of four inputs and eight outputs. Each output channel can be individually amplitude and phase modulated. The cross-sectional diagram of the transmitting component is shown as follows Figure 2 As shown in the figure, the structure diagram of the transmitting component is as follows: Figure 3 shown.

[0028] In terms of the implementation process of the transmitting component, the metal frame structure with an embedded RF elastic connector realizes the interconnection between the top and bottom layers and uses laser sealing welding to sinter the top cover plate and the bottom cover plate to the I-shaped metal frame. The entire assembly process is compatible with ordinary micro-assembly processes and does not require additional process temperature gradients. The top power amplifier chip and the bottom amplitude and phase modulation chip are both mounted on the metal heat dissipation cover plate, and the heat is dissipated through contact between the carrier plate and the external heat dissipation interface, making full use of the contact surface of the tile-type structure to dissipate heat and improve the heat accumulation problem of the stacked structure.

[0029] The heat dissipation duct is set on both sides of the launch component, adopts an open structure, and is equipped with heat dissipation fins to increase the heat dissipation area. The launch component is installed in the heat dissipation to transfer heat to the heat dissipation fins. When the drone is flying, the airflow in the duct passes through the heat dissipation fins to take away the heat.

[0030] The transmitting antenna uses a dual-polarized antenna to form a small-scale array, which can form various electromagnetic polarization beams such as vertical, horizontal, oblique polarization, and circular polarization. In order to achieve a low-profile and lightweight design, the dual-polarized antenna can use engineering plastics with electroplated metal on the surface to form an antenna reflection cavity. The cable at the bottom of the cavity is connected to the printed circuit board radiation unit at the top. At the bottom of the cavity, an embedded SMP interface is used as the antenna feed interface. Electroplated plastic replaces the metal cavity, which can reduce the weight by 50%. The antenna module of the interference load is installed at the bottom of the drone through the platform frame. There is a certain downward tilt angle between the radiation normal line of the antenna module and the horizontal line of the platform frame. The interference load can adjust the direction of the electromagnetic beam by changing the phase information of the radio frequency signal. Therefore, the direction of the electromagnetic beam generated by the interference load can be adjusted to the air or the ground.

[0031] The architecture design of the interference payload adopts an open tile-level design, which follows the signal flow in the forward direction and out the backward direction. The hierarchical functions are clear, and each module has an independent functional interface. The interface definitions are allocated according to power supply, radio frequency, low-frequency control, etc. The digital interference source, power module, frequency conversion module, etc. are interconnected by cables on the side; the transmitting front end, antenna module, etc. are blindly plugged in. The beneficial effect is that each module has an independent functional interface, and the module can be upgraded and replaced according to different combat scenarios to achieve functional reconstruction of the interference payload. The appearance structure diagram and installation diagram of the interference payload are as follows: Figure 4 shown.

Claims

1. A lightweight tile-type UAV interference load, characterized in that: include: A platform frame, a digital interference source, a power module, a frequency conversion module, a transmitting front end, and an antenna module. The digital interference source, the power module, the frequency conversion module, the transmitting front end, and the antenna module are all arranged on the platform frame. The digital interference source is used to generate interference basebands of different styles according to received instructions. The frequency conversion module is used to generate a reference clock and a local oscillator signal, and convert the interference baseband into a radio frequency signal and distribute it to the transmitting front end. The transmitting front end is used to perform amplitude and phase modulation and power amplification on the radio frequency signal. The antenna module is used to transmit the radio frequency signal output by the transmitting front end into free space.

2. The lightweight tile-type UAV interference load according to claim 1 is characterized in that: In the deception interference mode, the digital interference source uses the UAV communication link to receive the target radar characteristic information sent by the main control, and adjusts the delay and frequency shift to generate a deception interference baseband; in the suppression interference mode, the digital interference source generates a suppression interference baseband internally, and uses broadband noise interference to compress the working distance of the enemy radar.

3. The lightweight tile-type UAV interference load according to claim 1 is characterized in that: The transmitting front end includes four transmitting components, each transmitting component includes a metal frame, and an amplitude and phase modulation chip and a power amplifier chip arranged in the metal frame cavity. Each group of transmitting components uses one SSMP connector to connect the input signal to the amplitude and phase modulation chip, and each group of transmitting components uses two SSMP connectors to connect the two polarized signals output by the power amplifier chip to the antenna module.

4. The lightweight tile-type UAV interference load according to claim 3 is characterized in that: The metal frame has two cavities inside, in which an amplitude-phase modulation chip and a power amplifier chip are placed respectively. The amplitude-phase modulation chip and the power amplifier chip are interconnected via a built-in elastic connector.

5. The lightweight tile-type UAV interference load according to claim 3 is characterized in that: Heat dissipation ducts are arranged on both sides of the emitting component, and heat dissipation fins are arranged in the heat dissipation ducts.

6. The lightweight tile-type UAV interference load according to claim 1 is characterized in that: The antenna module adopts a dual-polarization antenna.

7. The lightweight tile-type UAV interference load according to claim 1 is characterized in that: The antenna module is installed at the bottom of the UAV through the platform frame, and there is a certain downward inclination angle between the radiation normal line of the antenna module and the horizontal line of the platform frame.

8. The lightweight tile-type UAV interference load according to claim 1 is characterized in that: The dual-polarized antenna uses engineering plastics with metal electroplating on the surface to form the antenna reflection cavity. The cable at the bottom of the antenna reflection cavity is connected to the printed circuit board radiation unit at the top. The bottom of the antenna reflection cavity uses an embedded SMP interface as the antenna feeding interface.

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