Radio frequency, infrared, laser three-mode common-caliber composite target simulation device and method

Abstract

The application provides a radio frequency, infrared, laser three-mode common-aperture composite target simulation device and method, which comprises a radio frequency signal source and a feed control system (1), a radio frequency feed source (2), an infrared target source control system (3), an infrared imaging simulator (4), an aberration compensation lens group (5), a laser and a driving system (6), a pulse spread and delay module (7), a laser modulation module (8), a relay lens (9), an anti-laser and infrared dichroic mirror (10), a beam synthesizer (11) and a bias feed reflector (12). The application can realize radio frequency, infrared and laser three-mode common-aperture composite simulation targets, interference and environmental signals, and provides physical radiation signals under laboratory conditions for multi-mode composite seekers.

Description

Technical Field

[0001] This invention relates to the field of signal simulation, specifically to a device and method for simulating a composite target using radio frequency (RF), infrared (IR), and laser modes with a common aperture. More specifically, it relates to a target signal simulation system for a multi-mode composite hardware-in-the-loop simulation system using RF, infrared, and laser modes. Background Technology

[0002] In a hardware-in-the-loop simulation system, signals from two different frequency bands, optical and radio frequency, are combined. There are two main methods: radio frequency-optical combination based on radio frequency anechoic chamber arrays and radio frequency-optical combination based on a five-axis turntable for optical simulation.

[0003] Typical examples of RF-optical composite methods based on RF anechoic chamber arrays include:

[0004] The Advanced Multispectral Simulation Test and Acceptance Center (AMSTAR), jointly developed by the US Redstone Technology Test Center and the Hardware-in-the-Box Division of the System Simulation and Development Command, can perform hardware-in-the-box simulations of millimeter-wave (Ka-band), long-wave infrared (8–12 μm), and near-infrared (1.064 μm) laser tri-mode composite guidance systems. It mainly consists of a three-axis flight turntable, a millimeter-wave target simulation system, a long-wave infrared target simulation system, a near-infrared target simulation system, and a target common-aperture composite system. The target common-aperture composite system comprises a millimeter-wave transmission screen, a near-infrared diffuse reflection screen, and a millimeter-wave, long-wave infrared, and near-infrared beam combiner. The diffuse reflection screen is placed close to the millimeter-wave array and sealed with polystyrene material; its surface can fully diffuse the incident laser while simultaneously transmitting the millimeter-wave signal. The millimeter-wave, long-wave infrared, and near-infrared beam combiner is placed in front of the aircraft, transmitting millimeter-wave Doppler radar signals and near-infrared laser point source signals, and reflecting long-wave infrared scene signals.

[0005] Typical examples of RF / optical hybrid approaches based on five-axis turntables for optical simulation include:

[0006] The paper "Design of a Semi-Active Laser-Infrared-Radar Tri-Mode Composite Optical System" introduces a compact semi-active laser, infrared, and radar tri-mode composite optical system. The semi-active laser and infrared optical systems employ a catadioptric optical path structure, while the radar system uses a parabolic antenna for signal transmission and reception. All three guidance modes share a single primary reflector. The semi-active laser and infrared systems separate their light beams at the primary reflector. The radar wave and infrared light are reflected off the primary reflector at the same aperture, and then the signals are separated at the secondary reflector. This achieves the fusion of the three guidance modes within a compact space. Since this is a design for an unmanned aerial vehicle (UAV) receiver, the receiver's radar antenna, infrared detector, and laser detector are small in size, enabling multi-mode signal reception through this optical system design.

[0007] In a hardware-in-the-loop simulation system based on a five-axis turntable, the radio frequency, infrared, and laser simulators, as radiation signal simulation output devices, are relatively large in size compared to the receiving antennas or detectors of unmanned aerial vehicles, making it impossible to directly reverse engineer the optical system for the development of the simulation simulator.

[0008] In the target simulation device of the simulation system, one or more beam combining methods are required to achieve composite output of three radiation signals.

[0009] Patent document CN103454773A discloses a beamforming device for infrared, laser, microwave, and millimeter-wave co-aperture, comprising an infrared and laser reflecting plane, a supporting plate, an air layer, and an adjustment mechanism. The infrared and laser reflecting plane is composed of multiple sub-panels. The supporting plate is also composed of multiple sub-plates. The adjustment mechanism is used to fix the supporting sub-panels and allows for horizontal, vertical, and longitudinal adjustment of the sub-panels. By adjusting the adjustment mechanism, the surface shape of the infrared and laser reflecting plane is adjusted to ensure that the infrared and laser reflecting surfaces of each sub-panel are in a single plane. The longitudinal adjustment of the adjustment mechanism also allows for fine-tuning of the thickness of the air layer, thereby fine-tuning the transmission band of microwaves and millimeter waves. The adjustment mechanism has a locking function after adjustment. This patent document's infrared, laser, microwave, and millimeter-wave co-aperture beamforming device is composed of spliced ​​multi-layer dielectric plates, serving to transmit microwaves and millimeter waves and reflect infrared and laser signals. The microwave and millimeter-wave signals are refracted due to the presence of the dielectric layer, changing their transmission direction; the infrared and laser signals, after being reflected, essentially maintain their original imaging quality.

[0010] Patent document CN107560499A discloses a device for millimeter-wave and optical wave co-aperture transmission, comprising: a millimeter-wave signal source, a millimeter-wave signal detection device, an optical wave signal source, and an optical wave signal detection device. The optical wave signal emitted by the optical wave signal source is transmitted to the pattern according to the law of optical reflection, with the optical exit angle equal to the incident angle, and is detected by the optical wave signal detection device. The millimeter-wave signal emitted by the millimeter-wave signal source is transmitted to the non-metallic surface of the substrate, undergoes resonant frequency selection through the pattern, and then, after resonant frequency selection by the pattern, is transmitted in space along the original transmission direction and detected by the millimeter-wave signal detection device. The millimeter-wave signal can be transmitted along the original transmission direction after passing through the device; the image quality degrades after the optical signal is reflected.

[0011] Other special metal patterned array materials and metamaterials such as graphene can be used as millimeter-wave and optical integrated materials, but in terms of optical imaging quality, the diffraction effect caused by the microstructure of the material greatly reduces the infrared imaging quality. Summary of the Invention

[0012] To address the shortcomings of existing technologies, the purpose of this invention is to provide a device and method for simulating a common-aperture composite target using radio frequency, infrared, and laser modes.

[0013] According to the present invention, a radio frequency, infrared and laser tri-mode common aperture composite target simulation device includes: 1. radio frequency signal source and feeding control system, 2. radio frequency feed source, 3. infrared target source control system, 4. infrared imaging simulator, 5. aberration compensation mirror group, 6. laser and driving system, 7. pulse spread and delay module, 8. laser modulation module, 9. relay lens, 10. anti-laser infrared dichroic mirror, 11. beam combiner, and 12. offset reflector.

[0014] The radio frequency signal source and feed control system 1 simulates radio frequency target signals, interference signals and clutter signals or multi-target signals, and outputs them to the radio frequency feed source 2; the radio frequency feed source 2 outputs radio frequency radiated plane wave signals through the transmission of the beam combiner 11 and the reflection of the offset reflector 12.

[0015] The infrared target source control system 3 outputs an infrared signal to the infrared imaging simulator 4 to simulate target signals, interference signals, and environmental signals, or to simulate multiple target signals to obtain an infrared simulation signal. The infrared simulation signal passes through the aberration compensation mirror group 5, and then is reflected by the anti-laser infrared dichroic mirror 10, the beam combiner 11, and the offset reflector 12 to simulate the parallel beam of infrared physical radiation.

[0016] The laser and driving system 6 radiates continuous laser light. The pulse spread and delay module 7 outputs a signal containing delay and pulse width information. After passing through the laser modulation module 8, the laser intensity, pulse width, and period are modulated into a laser pulse signal. The laser pulse physical radiation is simulated by reflection through the relay lens 9, the anti-laser infrared dichroic mirror 10, the beam combiner 11, and the offset reflector 12.

[0017] Preferably, the radio frequency signal source and feed control system 1 includes a polarization control module 101, an amplitude and phase distribution module 102, an amplitude and phase control module 103, and an amplitude and phase synthesis module 104. Each of the multiple signals first outputs an arbitrary polarization electromagnetic wave signal through its respective polarization control module 101, then each signal is divided into three signals by its respective amplitude and phase distribution module 102, then each signal is modulated by its respective amplitude and phase control module 103, and finally the multiple signals are synthesized into the radio frequency feed source 2 constituting the array by its respective amplitude and phase synthesis module 104, thereby realizing the simulation of multiple signals.

[0018] The radio frequency feed 2 includes a first feed antenna 201, a second feed antenna 202, and a third feed antenna 203, which process the multiple signals respectively;

[0019] The multiple signals include target signals, interference signals, clutter signals, or multiple target signals.

[0020] Preferably, the RF antenna of the RF feed 2 adopts multiple Vivaldi wideband microstrip antennas, divided into three frequency bands: 8GHz-12GHz, 12GHz-18GHz, and 26GHz-40GHz. The antennas of the corresponding frequency bands are replaced according to the frequency band requirements of the analog signal. The mechanical structure has positioning pins for the antennas of the corresponding frequency bands to ensure the alignment of the antenna phase center.

[0021] Preferably, the infrared imaging simulator 4 uses a MOS resistor array to generate infrared images with a 512×512 array size, simulating complex infrared targets, interference, and environments; the aberration compensation lens group 5 uses a transmission optical system, and its working band simultaneously meets the requirements of mid-wave infrared and long-wave infrared; the optical working bands of the beam synthesizer 11 and the offset reflector 12 simultaneously meet the requirements of 1.064μm and the mid-wave and long-wave bands.

[0022] Preferably, the laser and driving system 6 emits a 1.064 μm continuous laser.

[0023] Preferably, the beam combiner 11 has a square structure, with quartz glass that transmits radio frequency and reflects infrared laser as the substrate. Its size covers the outer contour of the RF feed 2 antenna and the incident range of infrared and laser, and its thickness does not exceed 6mm. Among them, the surface shape of the quartz glass near the horn antenna of the RF feed 2 is jointly designed as a curved surface with the RF feed 2 and the offset reflector 12; the other surface shape is a plane, square in shape, and its thickness does not exceed 6mm.

[0024] Preferably, the offset reflector 12 is part of a parabola, has a square structure, and is made of aluminum alloy or magnesium alloy; the offset reflector 12 is divided into three regions: an infrared reflection region 121, a radio frequency reflection region 122, and an edge processing region 123.

[0025] The infrared reflective area 121 is made of aluminum alloy or magnesium-aluminum alloy; the radio frequency reflective area 122 and the edge processing area 123 are made of aluminum alloy, magnesium-aluminum alloy or metal-plated thin film material, which together with the infrared reflective area 121 form a radio frequency reflective surface; the infrared reflective area 121 and the radio frequency reflective area 122 maintain a parabolic surface shape, and the edge processing area 123 is treated with curled edges.

[0026] Preferably, the beam combiner 11 is a radio frequency-transmitting anti-infrared laser beam combiner;

[0027] The radio frequency feed 2 is placed at the focal position of the offset reflector 12, and the beam combiner 11 is placed at the front end of the horn antenna of the radio frequency feed 2; the laser modulation module 8 and the relay lens 9 of the laser simulation section are located on the back of the offset reflector 12; the infrared imaging simulator 4, the aberration compensation mirror group 5, the infrared dichroic mirror 10 of the anti-laser head, and the beam combiner 11 are all located below the offset reflector 12.

[0028] The radio frequency signal source and feed control system 1 is not integrated with the offset reflector 12, but is connected to the radio frequency feed source 2 via a cable; the laser and drive system 6, pulse spread and delay module 7 are not integrated with the offset reflector 12, but are connected to the laser modulation module 8 via optical fiber and cable respectively; the infrared target source control system 3 is not integrated with the offset reflector 12, but is connected to the infrared imaging simulator 4 via a cable.

[0029] According to the composite target simulation method provided by the present invention, the radio frequency, infrared and laser three-mode common aperture composite target simulation device is used to perform radio frequency, infrared and laser three-mode composite guidance semi-physical simulation.

[0030] Preferably, a multi-band target simulation signal is provided for the multi-mode composite guidance unmanned aerial vehicle, wherein the target simulation signal includes a multi-target simulation signal, or includes target, interference and clutter simulation signals.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. This invention enables the simulation of target, interference, and environmental signals using a common aperture of radio frequency (RF), infrared, and laser modes, providing physical radiation signals under laboratory conditions for multi-mode composite seekers. The RF antenna or antenna horn array can simulate RF multi-target interference and clutter within a limited angular range. The addition of an infrared imaging simulator allows for the simulation of complex scenes, targets, and interference. The simulation of laser signals can utilize echo simulation from passive and semi-active laser guidance systems.

[0033] 2. In this invention, the offset parabolic surface serves as a shared surface for radio frequency, infrared, and laser signals, resulting in a compact structure. Furthermore, the generated radio frequency electromagnetic field performance meets the requirements for an approximate plane wave. Unlike the three-mode composite target simulation device that uses a diffuse reflection screen and beam combiner within a radio frequency anechoic chamber, this invention offers lower cost and a more compact system structure.

[0034] 3. The present invention is a three-mode common aperture composite target simulation device, which directly conducts on-site testing of radio frequency, infrared and laser multimode composite systems on the five-axis turntable of a hardware-in-the-loop simulation system. It directly obtains multimode physical field signals from targets at infinity in a specific three-dimensional space in the simulation test environment. It is suitable for simulation tests of radio frequency targets, interference, infrared complex scenarios and active and semi-active laser three-mode composite guidance. Attached Figure Description

[0035] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0036] Figure 1 This is a schematic diagram of a common-aperture composite target simulation device based on a five-axis turntable according to the present invention, which integrates radio frequency, infrared, and laser modes.

[0037] Figure 2 This is a schematic diagram of the large-aperture offset reflector of the present invention.

[0038] Figure 3 This is a schematic diagram illustrating the control of target, interference, and clutter signals in the feed array of the present invention. Figure 3 If the interference signal and clutter signal in the signal are replaced with different target signals, then... Figure 3 This can form a schematic diagram of multi-target signal control for the feed array of the present invention.

[0039] The diagram shows:

[0040] Detailed Implementation

[0041] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0042] like Figure 1 As shown, the present invention provides a radio frequency (RF), infrared, and laser tri-mode co-aperture composite target simulation device, which can realize semi-physical simulation of RF, infrared, and laser tri-mode composite guidance, and provide multi-band target simulation signals for multi-mode composite guidance unmanned aerial vehicles. The device mainly includes: an RF signal source and feeding control system 1, an RF feed source 2, an infrared target source control system 3, an infrared imaging simulator 4, an aberration compensation mirror group 5, a laser and driving system 6, a pulse spread and delay module 7, a laser modulation module 8, a relay lens 9, a reflective laser-transmitting infrared dichroic mirror 10, a beam combiner 11, a bias reflector 12, and a composite support structure 13. The beam combiner 11 is a RF-transmitting, infrared-transmitting laser beam combiner, and the bias reflector 12 is a large-aperture bias reflector.

[0043] The RF feed 2 outputs a RF radiated plane wave signal through the transmission of the beam combiner 11 and the reflection of the offset reflector 12, simulating RF targets, interference, and clutter. The RF antenna of the RF feed 2 employs multiple Vivaldi broadband microstrip antennas, divided into three frequency bands: 8GHz-12GHz, 12GHz-18GHz, and 26GHz-40GHz. The antenna is replaced with the appropriate frequency band according to the frequency requirements of the simulated signal. The mechanical structure includes positioning pins for the corresponding frequency band antennas to ensure the alignment of the antenna phase center.

[0044] like Figure 3 As shown, the single or multiple horn antenna arrays of the RF feed 2, after transmission through the beam combiner 11 and reflection through the offset reflector 12, collimate and output RF radiated plane wave signals. These signals are then controlled by the RF signal source and the feed control system 1 to simulate RF target signals, interference signals, and clutter signals. By replacing different horns or horn arrays, different frequency bands and signal simulations can be achieved. The mechanical structure includes positioning pins for antennas of corresponding frequency bands to ensure the alignment of the antenna phase center.

[0045] In the preferred embodiment, the antenna array is a triplet, denoted as feed antenna 201, feed antenna 202, and feed antenna 203, respectively. It controls multiple signals input to the array to achieve simultaneous simulation of radio frequency multi-target or target signals, clutter signals, and interference signals.

[0046] like Figure 3 As shown, the radio frequency signal source and feed control system 1 includes a polarization control module 101, an amplitude and phase allocation module 102, an amplitude and phase control module 103, and an amplitude and phase synthesis module 104. By changing different horns or horn arrays, it can simulate signals for different frequency bands and different targets. Each signal among the target signal, interference signal, and clutter signal first passes through the polarization control module 101 to output an arbitrary polarization electromagnetic wave signal. Then, the amplitude and phase allocation module 102 divides each single signal into three signals. Next, the amplitude and phase control module 103 modulates the amplitude and phase signals of each signal. Finally, the amplitude and phase synthesis module 104 synthesizes the multiple signals into the radio frequency feed 2 constituting the array, realizing the simulation of multiple signals. Among them, the first antenna 201, the second antenna 202, and the third antenna 203 of the feed are as follows: Figure 3 As shown, the target signal, interference signal, and clutter signal are processed respectively. More specifically,

[0047] Infrared imaging simulator 4, constrained by its overall structural size, employs a MOS resistor array to generate a 512×512 array-sized infrared image, simulating complex infrared targets, interference, and environments. The aberration compensation mirror group 5 uses a transmissive optical system, operating in both mid-wave and long-wave infrared bands. The simulation of a parallel beam of infrared physical radiation is achieved through reflections from the anti-laser infrared dichroic mirror 10, the beam combiner 11, and the large-aperture offset reflector 12. In other words, infrared imaging simulator 4 generates a 512×512 array-sized infrared image, which, after reflections from the transmissive aberration compensation mirror group 5, the anti-laser infrared dichroic mirror 10, the beam combiner 11, and the large-aperture offset reflector 12, is collimated and output as a parallel beam of infrared physical radiation, simulating complex infrared targets, interference, and environments. The working band of the transmission aberration compensation lens group 5 is mid-wave infrared and long-wave infrared, and the optical working band of the beam combiner 11 and the offset reflector 12 simultaneously meets the requirements of 1.064μm and mid-wave and long-wave bands.

[0048] The laser and driving system 6 radiates a 1.064μm continuous laser beam. The pulse spread and delay module 7 outputs a signal containing delay and pulse width information. After passing through the laser modulation module 8, the output laser pulse signal with modulated laser intensity, pulse width, and period is generated. The laser pulse is then reflected by the relay lens 9, the anti-laser infrared dichroic mirror 10, the beam combiner 11, and the offset reflector 12 to simulate the physical radiation of the laser pulse. The laser simulation optical system in this invention mainly consists of the laser and driving system 6, the pulse spread and delay module 7, the laser modulation module 8, the relay lens 9, the anti-laser infrared dichroic mirror 10, the beam combiner 11, and the offset reflector 12. It has a certain field of view and can be used to simulate active laser signals as well as semi-active laser signals.

[0049] The beam combiner 11 has a square structure with quartz glass as the substrate, coated with a 1-5μm or 8-12μm dielectric high-reflectivity film system. Its dimensions cover the outer contour of the RF feed antenna 2 and the infrared and laser incident ranges, with a thickness not exceeding 6mm. More specifically, the RF-transmitting and infrared-reflecting beam combiner 11 is made of RF-transmitting and infrared-reflecting quartz glass. The surface shape of the quartz glass closest to the RF feed horn antenna is designed as a curved surface in conjunction with the feed and large-aperture offset reflector; the other surface shape is planar, with a surface shape accuracy PV value higher than λ / 100, a square shape, and a thickness not exceeding 6mm.

[0050] like Figure 2As shown, the offset reflector 12 is part of a parabolic surface, with a square structure, and is made of aluminum alloy or magnesium alloy. The offset reflector 12 is divided into three regions: an infrared reflection region 121, a radio frequency reflection region 122, and an edge processing region 123. The surface accuracy of the infrared reflection region 121 is less than 1 / 100 of the infrared wavelength λ, while the surface accuracy of the other regions is approximately 0.1 mm. The offset reflector 12 can be integrally machined or a spliced ​​structure.

[0051] The infrared reflective area 121 is φ300 in size, made of aluminum alloy or magnesium-aluminum alloy, and polished with high precision. The radio frequency reflective area 122 and the edge treatment area 123 are made of aluminum alloy, magnesium-aluminum alloy, or metal-plated thin film material, which together with the infrared reflective area form a large-diameter radio frequency reflective surface. The infrared reflective area and the radio frequency reflective area maintain a parabolic surface shape, and the edge treatment area 123 has a curled edge treatment.

[0052] The RF feed 2 is placed at the focal point of the offset reflector 12, and the beam combiner 11 is placed at the front end of the horn antenna of the RF feed 2. The RF signal source and feed control system 1 is not integrated with the offset reflector 12, but is connected to the RF feed 2 via a cable.

[0053] The laser modulation module 8 and relay lens 9 of the laser simulation section are located on the back of the offset reflector 12. The laser and drive system 6 and the pulse spread and delay module 7 are not integrated with the offset reflector 12, but are connected to the laser modulation module 8 through optical fibers and cables respectively.

[0054] The infrared imaging simulator 4, aberration compensation mirror group 5, infrared dichroic mirror 10 of the anti-laser head, and beam combiner 11 are all located below the offset reflector 12. The infrared target source control system 3 is not integrated with the offset reflector 12, but is connected to the infrared imaging simulator 4 via a cable.

[0055] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A three-mode common-aperture composite target simulation device for radio frequency, infrared, and laser, characterized in that, include: Radio frequency signal source and power supply control system (1), radio frequency feed source (2), infrared target source control system (3), infrared imaging simulator (4), aberration compensation lens group (5), laser and driving system (6), pulse spread and delay module (7), laser modulation module (8), relay lens (9), anti-laser infrared dichroic mirror (10), beam synthesizer (11), offset reflector (12); The radio frequency signal source and feed control system (1) simulates radio frequency target signals, interference signals and clutter signals or multi-target signals and outputs them to the radio frequency feed source (2); the radio frequency feed source (2) outputs radio frequency radiated plane wave signals through the transmission of the beam synthesizer (11) and the reflection of the offset reflector (12); The infrared target source control system (3) outputs an infrared signal to the infrared imaging simulator (4) to simulate the target signal, interference signal, and environmental signal, or to simulate multiple target signals to obtain an infrared simulation signal; the infrared simulation signal passes through the aberration compensation mirror group (5), and then through the reflection of the anti-laser infrared dichroic mirror (10), the beam synthesizer (11), and the reflection of the offset reflector (12) to realize the simulation of the parallel beam of infrared physical radiation; The laser and driving system (6) radiates continuous laser light. The pulse spread and delay module (7) outputs a signal containing delay and pulse width information. After passing through the laser modulation module (8), the laser intensity, pulse width, and period are modulated into a laser pulse signal. The laser pulse physical radiation is simulated by the reflection of the relay lens (9), the anti-laser infrared dichroic mirror (10), the beam combiner (11), and the offset reflector (12).

2. The radio frequency, infrared, and laser three-mode common-aperture composite target simulation device according to claim 1, characterized in that, The radio frequency signal source and feed control system (1) includes a polarization control module (101), an amplitude and phase distribution module (102), an amplitude and phase control module (103), and an amplitude and phase synthesis module (104). Each of the multiple signals first outputs an arbitrary polarization electromagnetic wave signal through its respective polarization control module (101), then the single signal is divided into three signals through its respective amplitude and phase distribution module (102), then the amplitude and phase signals of each signal are modulated through their respective amplitude and phase control modules (103), and finally the multiple signals are synthesized into the radio frequency feed source (2) constituting the array through their respective amplitude and phase synthesis modules (104) to realize the simulation of multiple signals. The radio frequency feed (2) includes a first feed antenna (201), a second feed antenna (202), and a third feed antenna (203), which process the multiple signals respectively; The multiple signals include target signals, interference signals, clutter signals, or multiple target signals.

3. The radio frequency, infrared, and laser three-mode common-aperture composite target simulation device according to claim 1, characterized in that, The radio frequency antenna of the radio frequency feed (2) adopts multiple Vivaldi wideband microstrip antennas, which are divided into three frequency bands: 8GHz-12GHz, 12GHz-18GHz, and 26GHz-40GHz. The antennas of the corresponding frequency bands are replaced according to the frequency band requirements of the analog signal. The mechanical structure has positioning pins for the antennas of the corresponding frequency bands to ensure the alignment of the antenna phase center.

4. The radio frequency, infrared, and laser three-mode common-aperture composite target simulation device according to claim 1, characterized in that, The infrared imaging simulator (4) uses a MOS resistor array to generate infrared images with an array size of 512×512, simulating complex infrared targets, interference and environment; the aberration compensation lens group (5) uses a transmission optical system, and the working band simultaneously meets the requirements of mid-wave infrared and long-wave infrared; the optical working bands of the beam synthesizer (11) and the offset reflector (12) simultaneously meet the requirements of 1.064μm and mid-wave band and long-wave band.

5. The radio frequency, infrared, and laser three-mode common-aperture composite target simulation device according to claim 1, characterized in that, The laser and driving system (6) emits a continuous laser beam of 1.064 μm.

6. The radio frequency, infrared, and laser three-mode common-aperture composite target simulation device according to claim 1, characterized in that, The beam synthesizer (11) has a square structure and uses quartz glass that transmits radio frequency and reflects infrared laser as a substrate. Its size covers the outer contour of the RF feed (2) antenna and the incident range of infrared and laser, and its thickness does not exceed 6 mm. Among them, the surface shape of the quartz glass near the horn antenna of the RF feed (2) is designed as a curved surface in conjunction with the RF feed (2) and the offset reflector (12); the other surface shape is a plane, and its shape is square with a thickness not exceeding 6 mm.

7. The radio frequency, infrared, and laser three-mode common-aperture composite target simulation device according to claim 1, characterized in that, The offset reflector (12) is part of a parabola, with a square structure, and is made of aluminum alloy or magnesium alloy. The offset reflector (12) is divided into three regions: an infrared reflection area (121), a radio frequency reflection area (122), and an edge processing area (123). The infrared reflective area (121) is made of aluminum alloy or magnesium-aluminum alloy; the radio frequency reflective area (122) and the edge treatment area (123) are made of aluminum alloy, magnesium-aluminum alloy or metal-plated thin film material, which together with the infrared reflective area (121) form a radio frequency reflective surface; the infrared reflective area (121) and the radio frequency reflective area (122) maintain a parabolic surface shape, and the edge treatment area (123) is treated with curled edges.

8. The radio frequency, infrared, and laser three-mode common aperture composite target simulation device according to claim 1, characterized in that, The beam combiner (11) is a radio frequency-transmitting anti-infrared laser beam combiner; The radio frequency feed (2) is placed at the focal position of the offset reflector (12), and the beam combiner (11) is placed at the front end of the horn antenna of the radio frequency feed (2); the laser modulation module (8) and the relay lens (9) of the laser simulation section are located on the back of the offset reflector (12); the infrared imaging simulator (4), the aberration compensation mirror group (5), the infrared dichroic mirror 10 of the anti-laser head, and the beam combiner (11) are all located below the offset reflector (12); The radio frequency signal source and feed control system (1) is not integrated with the offset reflector (12) and is connected to the radio frequency feed source (2) via a cable; the laser and drive system (6), pulse spread and delay module (7) are not integrated with the offset reflector (12) and are connected to the laser modulation module (8) via optical fiber and cable respectively; the infrared target source control system (3) is not integrated with the offset reflector (12) and is connected to the infrared imaging simulator (4) via a cable.

9. A method for simulating a composite target, characterized in that, A hardware-in-the-loop simulation of a radio frequency, infrared, and laser three-mode composite target with a common aperture is performed using any one of claims 1 to 8.

10. The composite target simulation method according to claim 9, characterized in that, Provide multi-band target simulation signals for multi-mode composite guidance unmanned aerial vehicles, wherein the target simulation signals include multi-target simulation signals, or target, interference and clutter simulation signals.

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