Multimode signal decomposition and simulation system and method for radio frequency target

Abstract

The invention discloses a multi-mode signal decomposition and simulation system and method for a radio frequency target. The system comprises signal simulation equipment used for simulating various signals generated by the same radar electronic equipment; the control unit is used for generating a control instruction according to a target position to be simulated and sending the control instruction to the microwave cabinet, the millimeter wave cabinet and the near terahertz cabinet; the microwave cabinet, the millimeter wave cabinet and the near-terahertz cabinet are respectively used for converting received microwave signals into microwave signals, millimeter wave signals and near-terahertz signals and sending the microwave signals, the millimeter wave signals and the near-terahertz signals to the corresponding microwave antenna, the millimeter wave antenna and the near-terahertz antenna; and the control unit is used for respectively controlling the microwave triple antenna, the millimeter wave triple antenna and the near terahertz triple antenna to carry out vector synthesis on the received signals so as to realize signal radiation of three frequency bands of microwaves, millimeter waves and near terahertz at the same position. The system can simulate the same target to generate various signals at the same time.

Description

Technical Field

[0001] The present application relates to the field of microwave radio frequency technology, and in particular to a multi-mode signal decomposition and simulation system and method for radio frequency targets. Background Art

[0002] With the advancement of RF signal simulation technology, microwave anechoic chamber RF simulation arrays have become widely used in electromagnetic signal simulation testing due to their pure electromagnetic environment, flexible signal simulation, and high simulation accuracy. To verify the functional performance of signal receiving equipment, the types of electromagnetic signal simulations are increasing, including radar signal simulation, communication signal simulation, radar echo simulation, and signal simulation across different frequency bands. With the advancement of electronic frequency-using equipment technology, electronic devices have become more complex and capable of generating these different types of signals. However, current technologies cannot accurately and simultaneously simulate the multiple signals generated by electronic devices, especially when these signals originate from the same spatial location. Summary of the Invention

[0003] In view of this, the present application provides a multi-mode signal decomposition and simulation system and method for radio frequency targets.

[0004] The present application discloses a multimode signal decomposition and simulation system for radio frequency targets, which includes a signal simulation device, a radio frequency simulation array, and a control unit; the radio frequency simulation array includes a near-terahertz cabinet, a millimeter wave cabinet, a microwave cabinet, and a radio frequency simulation array; the radio frequency simulation array includes a microwave antenna, a millimeter wave antenna, and a near-terahertz antenna; the signal simulation device is connected to the microwave cabinet, the millimeter wave cabinet, and the near-terahertz cabinet respectively; the microwave cabinet, the millimeter wave cabinet, and the near-terahertz cabinet are connected to the microwave antenna, the millimeter wave antenna, and the near-terahertz antenna respectively; The signal simulation device is used to simulate the first signal, the second signal, and the third signal in the microwave band generated by the target and input them into the millimeter wave cabinet, the microwave cabinet, and the near-terahertz cabinet in the radio frequency simulation array respectively; the radio frequency signal is a radar signal in the microwave band; the target is the same radar electronic equipment; the first signal is the radar signal, the second signal is the target echo signal, and the third signal is a high-frequency characteristic signal of the infrared characteristics of the target platform; The control unit is used to generate control instructions according to the target position to be simulated and send them to the microwave cabinet, millimeter wave cabinet, and near-terahertz cabinet respectively; The microwave cabinet is used to send the first signal of the microwave band it receives to the corresponding microwave antenna; the millimeter wave cabinet and the near-terahertz cabinet are used to convert the second signal and the third signal of the microwave band they receive into the first signal of the millimeter wave band and the third signal of the near-terahertz band, respectively, and send them to the corresponding millimeter wave antenna and the near-terahertz antenna, respectively; The control unit is used to control the microwave triplet antenna, millimeter wave triplet antenna and near-terahertz triplet antenna respectively to perform vector synthesis of the signals they receive, thereby realizing signal radiation in the target microwave, millimeter wave and near-terahertz frequency bands.

[0005] Furthermore, the microwave triplet antenna is composed of three equilaterally arranged microwave antennas; the millimeter wave triplet antenna is composed of three equilaterally arranged microwave antennas; and the near-terahertz triplet antenna is composed of multiple near-terahertz antennas located on the same straight line.

[0006] Furthermore, the microwave cabinet is used to perform correlation processing on the first signal of the microwave band sent by the received signal simulation device according to the received control instruction, and then send it to the microwave antenna; the correlation processing includes phase shifting and amplitude attenuation; The millimeter wave cabinet is used to perform correlation processing on the second signal in the microwave band sent by the received signal simulation device according to the received control instruction, convert the correlated processed signal into a second signal in the millimeter wave band, and send it to the millimeter wave antenna; the correlation processing includes phase shifting and amplitude attenuation; The near-terahertz cabinets are respectively used to perform correlation processing on the third signal in the microwave band sent by the received signal simulation device according to the received control instructions, convert the correlated processed signal into the third signal in the near-terahertz band and send it to the near-terahertz antenna; the correlation processing includes phase shifting and amplitude attenuation.

[0007] Furthermore, the microwave cabinet includes a first precision chassis and a first antenna switch matrix connected in sequence; the signal simulation device is connected to the first antenna switch matrix through the first precision chassis; the first switch matrix is ​​connected to the microwave antenna in a one-to-one correspondence; the first precision chassis includes a power divider, a phase shifter, and a digitally controlled attenuator; the power divider is connected to the digitally controlled attenuator through the phase shifter; the phase shifter and the digitally controlled attenuator are in a one-to-one correspondence; The power splitter in the first precision chassis is used to receive the radar signal in the microwave band provided by the signal simulation device, and then send it to the multiple phase shifters in the first precision chassis respectively; The control unit is used to obtain the phase shift value and attenuation value required by the phase shifter and the digitally controlled attenuator in the first precision position chassis respectively using a three-element vector synthesis method according to the target position required to be simulated by the microwave antenna, and send the obtained phase shift value and attenuation value as a control instruction to the phase shifter and the digitally controlled attenuator in the first precision position chassis, thereby regulating the phase shifter and the digitally controlled attenuator to achieve target position simulation, thereby achieving target simulation carrying radar signals; The control unit is also used to control the switching of the first antenna switch matrix according to the target position required to be simulated by the microwave antenna, select the corresponding microwave triplet antenna, and ensure that the simulated target position falls within the microwave triplet antenna; the microwave triplet antenna is composed of three equilaterally arranged microwave antennas.

[0008] Furthermore, the millimeter wave cabinet includes a second precision chassis, a second antenna switch matrix, and a millimeter wave frequency conversion component connected in sequence; the signal simulation device is connected to the millimeter wave antenna through the second precision chassis, the second antenna switch matrix, and the millimeter wave frequency conversion component in sequence; the second precision chassis includes a power divider, a phase shifter, and a digitally controlled attenuator; the power divider is connected to the digitally controlled attenuator through the phase shifter; the phase shifter and the digitally controlled attenuator have a one-to-one correspondence; The power splitter in the second precision chassis is used to receive the radar signal in the microwave band provided by the signal simulation device, and then send it to the multiple phase shifters in the second precision chassis respectively; The control unit is used to obtain the phase shift value and attenuation value required by the phase shifter and the digitally controlled attenuator in the second precision position chassis respectively using a three-element vector synthesis method according to the target position required to be simulated by the millimeter wave antenna, and send the obtained phase shift value and the digitally controlled attenuator in the second precision position chassis as control instructions, thereby regulating the phase shifter and the digitally controlled attenuator to achieve target position simulation, thereby achieving target simulation carrying the target echo signal; The control unit is also used to control the switching of the second antenna switch matrix according to the target position required to be simulated by the millimeter-wave antenna, select the corresponding millimeter-wave triplet antenna, convert the microwave signal output by the digitally controlled attenuator into a millimeter-wave signal and radiate it to the selected millimeter-wave triplet antenna, to ensure that the simulated target position falls within the millimeter-wave triplet antenna; the millimeter-wave triplet antenna is composed of three equilaterally arranged millimeter-wave antennas.

[0009] Furthermore, the near-terahertz cabinet includes a third precision chassis, a third antenna switch matrix, and a near-terahertz frequency conversion component connected in sequence; the signal simulation device is connected to the near-terahertz antenna through the third precision chassis, the third antenna switch matrix, and the near-terahertz frequency conversion component in sequence; the third precision chassis includes a power divider, a phase shifter, and a digitally controlled attenuator; the power divider is connected to the digitally controlled attenuator through the phase shifter; the phase shifter and the digitally controlled attenuator have a one-to-one correspondence; The power splitter in the third precision chassis is used to receive the radar signal in the microwave band provided by the signal simulation device, and then send it to multiple phase shifters in the third precision chassis respectively; The control unit is used to obtain the phase shift value and attenuation value required by the phase shifter and the digitally controlled attenuator in the third precision position chassis respectively using a three-element vector synthesis method according to the target position required to be simulated by the near-terahertz antenna, and send the obtained phase shift value and attenuation value as a control instruction to the phase shifter and the digitally controlled attenuator in the third precision position chassis, thereby regulating the phase shifter and the digitally controlled attenuator to achieve target position simulation, thereby achieving target simulation of the high-frequency characteristics of the infrared characteristics of the target platform; The control unit is also used to control the switching of the third antenna switch matrix according to the target position required to be simulated by the near-terahertz antenna, select the corresponding near-terahertz triplet antenna, convert the microwave signal output by the digitally controlled attenuator into a near-terahertz signal and radiate it to the selected near-terahertz triplet antenna, to ensure that the simulated target position falls within the near-terahertz triplet antenna; the near-terahertz triplet antenna is composed of multiple near-terahertz antennas located on the same straight line.

[0010] Furthermore, the microwave triplet antenna, millimeter wave triplet antenna, and near-terahertz triplet antenna are arranged in an staggered and overlapping manner, so that the triplet antennas in the microwave band, millimeter wave band, and near-terahertz band have overlapping parts in spatial position, so that the RF simulation array has the ability to simulate signals of different frequency bands generated by targets in the same direction.

[0011] Furthermore, the microwave triplet antenna and the millimeter wave triplet antenna are both planar arrays, and the near-terahertz triplet antenna is a linear array; the linear array is located in the planar array, and a target can be simulated at any position on the linear array.

[0012] Furthermore, the near-terahertz cabinet, the millimeter wave cabinet, and the microwave cabinet are respectively located in different channels in the radio frequency simulation array.

[0013] The present application also discloses a multimode signal decomposition and simulation method for radio frequency targets, which is applicable to the multimode signal decomposition and simulation system for radio frequency targets described above, and includes: Step 1: Simulate the target location by synthesizing triple antenna vectors, and arrange the microwave triple antenna, millimeter wave triple antenna, and near-terahertz triple antenna in an interlaced and overlapping manner; Step 2: The signal simulation device provides a target echo signal to the first precision position chassis in the microwave cabinet. The first precision position chassis splits the target echo signal into three signals and adjusts the phase shifter and digitally controlled attenuator according to the calibration table to ensure that the initial phases of all antennas in the microwave triplet antenna corresponding to the three signals are consistent. The control unit calculates the phase shift and attenuation values ​​corresponding to the target position to be simulated by the microwave antenna based on the triplet vector synthesis algorithm. Based on the phase consistency, the control unit adjusts the phase shifter and digitally controlled attenuator to achieve single target position simulation. Step 3: Based on step 2, the millimeter wave antenna and the near-terahertz antenna are analogous to the target positions they need to simulate, so that the radar signal, target echo signal and high-frequency characteristic signal of the infrared characteristics of the target platform generated by the same target can be simulated, thereby realizing the composite target signal simulation; the target positions required to be simulated by the microwave antenna, millimeter wave antenna and near-terahertz antenna are the same angular position.

[0014] Due to the adoption of the above-mentioned technical solution, the present application has the following advantages: the present application is based on a microwave darkroom RF simulation array system, and through signal simulation equipment and RF simulation arrays, simulates the scenario of multiple signals generated by the same radar electronic equipment, including the radar signal carried by the target, the target echo signal, and the high-frequency characteristic signal of the infrared characteristics of the target platform (wherein the radar signal corresponds to the microwave cabinet, the target echo signal corresponds to the millimeter wave cabinet, and the high-frequency characteristic signal of the infrared characteristics of the target platform corresponds to the near-terahertz cabinet). Multiple signals are radiated from the same position, realizing the decomposition and simulation of multiple signals generated by the same target. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] FIG1( a ) is a schematic diagram showing a partial structure of a multimode signal decomposition and simulation system for a radio frequency target according to an embodiment of the present application; FIG1( b ) is a schematic diagram of a radio frequency simulation array according to an embodiment of the present application; Figure 2 This is a block diagram of a multimode signal decomposition and simulation system for a radio frequency target according to an embodiment of the present application; Figure 3 A reference schematic diagram of the radio frequency simulation array antenna layout according to an embodiment of the present application; Figure 4 This is a block diagram of a single target position simulation implementation in an embodiment of the present application; Figure 5 This is a block diagram of a composite target signal simulation implementation according to an embodiment of the present application; Figure 6 This is a partial layout diagram of the RF simulation array antenna of an embodiment of the present application - a schematic diagram of the microwave band; Figure 7 This is a partial layout diagram of the radio frequency simulation array antenna of an embodiment of the present application - a schematic diagram of the millimeter wave band; Figure 8 This is a partial layout diagram of the radio frequency simulation array antenna of an embodiment of the present application - a schematic diagram of the near-terahertz band; Figure 9 This is a partial layout diagram of the RF simulation array antenna of an embodiment of the present application - a schematic diagram of 3 frequency bands. DETAILED DESCRIPTION

[0017] The present application is further described with reference to the accompanying drawings and embodiments. The embodiments described are only a part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field should fall within the scope of protection of the embodiments of the present application.

[0018] This application uses three independent channels to realize the control output of three frequency band signals: microwave, millimeter wave, and near terahertz bands. At the same time, the RF simulation array is equipped with microwave radiation antennas, millimeter wave radiation antennas, and near terahertz radiation antennas for external radiation, and then realizes radiation at the same position through the signal triple vector synthesis method. The system composition and connection relationship are shown in Figures 1(a), 1(b), Figure 2 As shown. Ka in Figure 1(b) represents a millimeter wave antenna, and W represents a near-terahertz antenna. The present application provides an embodiment of a multi-mode signal decomposition and simulation system for a radio frequency target, which includes a signal simulation device, a radio frequency simulation array, and a control unit; the radio frequency simulation array includes a near-terahertz cabinet, a millimeter wave cabinet, a microwave cabinet, and a radio frequency simulation array; the radio frequency simulation array includes a microwave antenna, a millimeter wave antenna, and a near-terahertz antenna; the signal simulation device is connected to the microwave cabinet, the millimeter wave cabinet, and the near-terahertz cabinet, respectively; the microwave cabinet, the millimeter wave cabinet, and the near-terahertz cabinet are connected to the microwave antenna, the millimeter wave antenna, and the near-terahertz antenna, respectively; The signal simulation device is used to simulate the first signal, the second signal, and the third signal in the microwave band generated by the target and input them into the millimeter wave cabinet, the microwave cabinet, and the near-terahertz cabinet in the radio frequency simulation array respectively; the radio frequency signal is a radar signal in the microwave band; the target is the same radar electronic equipment; the first signal is the radar signal, the second signal is the target echo signal, and the third signal is a high-frequency characteristic signal of the infrared characteristics of the target platform; The control unit is used to generate control instructions according to the target position to be simulated and send them to the microwave cabinet, millimeter wave cabinet, and near-terahertz cabinet respectively; The microwave cabinet is used to send the first signal of the microwave band it receives to the corresponding microwave antenna; the millimeter wave cabinet and the near-terahertz cabinet are used to convert the second signal and the third signal of the microwave band they receive into the first signal of the millimeter wave band and the third signal of the near-terahertz band, respectively, and send them to the corresponding millimeter wave antenna and the near-terahertz antenna, respectively; The control unit is used to control the microwave triplet antenna, millimeter wave triplet antenna and near-terahertz triplet antenna respectively to perform vector synthesis of the signals they receive, thereby realizing signal radiation in the target microwave, millimeter wave and near-terahertz frequency bands.

[0019] Optionally, the microwave triplet antenna is composed of three equilaterally arranged microwave antennas; the millimeter wave triplet antenna is composed of three equilaterally arranged microwave antennas; and the near-terahertz triplet antenna is composed of multiple near-terahertz antennas located on the same straight line.

[0020] Optionally, the microwave cabinet is used to perform correlation processing on the first signal of the microwave band sent by the received signal simulation device according to the received control instruction, and then send it to the microwave antenna; the correlation processing includes phase shifting and amplitude attenuation; The millimeter wave cabinet is used to perform correlation processing on the second signal in the microwave band sent by the received signal simulation device according to the received control instruction, convert the correlated processed signal into a second signal in the millimeter wave band, and send it to the millimeter wave antenna; the correlation processing includes phase shifting and amplitude attenuation; The near-terahertz cabinets are respectively used to perform correlation processing on the third signal in the microwave band sent by the received signal simulation device according to the received control instructions, convert the correlated processed signal into the third signal in the near-terahertz band and send it to the near-terahertz antenna; the correlation processing includes phase shifting and amplitude attenuation.

[0021] Optionally, the microwave cabinet includes a first precision chassis and a first antenna switch matrix connected in sequence; the signal simulation device is connected to the first antenna switch matrix through the first precision chassis; the first switch matrix is ​​connected to the microwave antenna in a one-to-one correspondence; the first precision chassis includes a power divider, a phase shifter, and a digitally controlled attenuator; the power divider is connected to the digitally controlled attenuator through the phase shifter; the phase shifter and the digitally controlled attenuator are in a one-to-one correspondence; The power splitter in the first precision chassis is used to receive the radar signal in the microwave band provided by the signal simulation device, and then send it to the multiple phase shifters in the first precision chassis respectively; The control unit is used to obtain the phase shift value and attenuation value required by the phase shifter and the digitally controlled attenuator in the first precision position chassis respectively using a three-element vector synthesis method according to the target position required to be simulated by the microwave antenna, and send the obtained phase shift value and attenuation value as a control instruction to the phase shifter and the digitally controlled attenuator in the first precision position chassis, thereby regulating the phase shifter and the digitally controlled attenuator to achieve target position simulation, thereby achieving target simulation carrying radar signals; The control unit is also used to control the switching of the first antenna switch matrix according to the target position required to be simulated by the microwave antenna, select the corresponding microwave triplet antenna, and ensure that the simulated target position falls within the microwave triplet antenna; the microwave triplet antenna is composed of three equilaterally arranged microwave antennas.

[0022] Optionally, the millimeter wave cabinet includes a second precision chassis, a second antenna switch matrix, and a millimeter wave frequency conversion component connected in sequence; the signal simulation device is connected to the millimeter wave antenna through the second precision chassis, the second antenna switch matrix, and the millimeter wave frequency conversion component in sequence; the second precision chassis includes a power divider, a phase shifter, and a digitally controlled attenuator; the power divider is connected to the digitally controlled attenuator through the phase shifter respectively; the phase shifter and the digitally controlled attenuator have a one-to-one correspondence; The power splitter in the second precision chassis is used to receive the radar signal in the microwave band provided by the signal simulation device, and then send it to the multiple phase shifters in the second precision chassis respectively; The control unit is used to obtain the phase shift value and attenuation value required by the phase shifter and the digitally controlled attenuator in the second precision position chassis respectively using a three-element vector synthesis method according to the target position required to be simulated by the millimeter wave antenna, and send the obtained phase shift value and the digitally controlled attenuator in the second precision position chassis as control instructions, thereby regulating the phase shifter and the digitally controlled attenuator to achieve target position simulation, thereby achieving target simulation carrying the target echo signal; The control unit is also used to control the switching of the second antenna switch matrix according to the target position required to be simulated by the millimeter-wave antenna, select the corresponding millimeter-wave triplet antenna, convert the microwave signal output by the digitally controlled attenuator into a millimeter-wave signal and radiate it to the selected millimeter-wave triplet antenna, to ensure that the simulated target position falls within the millimeter-wave triplet antenna; the millimeter-wave triplet antenna is composed of three equilaterally arranged millimeter-wave antennas.

[0023] Optionally, the near-terahertz cabinet includes a third precision chassis, a third antenna switch matrix, and a near-terahertz frequency conversion component connected in sequence; the signal simulation device is connected to the near-terahertz antenna through the third precision chassis, the third antenna switch matrix, and the near-terahertz frequency conversion component in sequence; the third precision chassis includes a power divider, a phase shifter, and a digitally controlled attenuator; the power divider is connected to the digitally controlled attenuator through the phase shifter respectively; the phase shifter and the digitally controlled attenuator are in one-to-one correspondence; The power splitter in the third precision chassis is used to receive the radar signal in the microwave band provided by the signal simulation device, and then send it to multiple phase shifters in the third precision chassis respectively; The control unit is used to obtain the phase shift value and attenuation value required by the phase shifter and the digitally controlled attenuator in the third precision position chassis respectively using a three-element vector synthesis method according to the target position required to be simulated by the near-terahertz antenna, and send the obtained phase shift value and attenuation value as a control instruction to the phase shifter and the digitally controlled attenuator in the third precision position chassis, thereby regulating the phase shifter and the digitally controlled attenuator to achieve target position simulation, thereby achieving target simulation of the high-frequency characteristics of the infrared characteristics of the target platform; The control unit is also used to control the switching of the third antenna switch matrix according to the target position required to be simulated by the near-terahertz antenna, select the corresponding near-terahertz triplet antenna, convert the microwave signal output by the digitally controlled attenuator into a near-terahertz signal and radiate it to the selected near-terahertz triplet antenna, to ensure that the simulated target position falls within the near-terahertz triplet antenna; the near-terahertz triplet antenna is composed of multiple near-terahertz antennas located on the same straight line.

[0024] Optionally, the microwave triplet antenna, the millimeter wave triplet antenna, and the near-terahertz triplet antenna are arranged in an staggered and overlapping manner, so that the triplet antennas of the microwave band, the millimeter wave band, and the near-terahertz band have overlapping parts in spatial position, so that the RF simulation array has the ability to simulate signals of different frequency bands generated by targets in the same direction.

[0025] Optionally, the microwave triplet antenna and the millimeter wave triplet antenna are both planar arrays, and the near-terahertz triplet antenna is a linear array; the linear array is located in the planar array, and a target can be simulated at any position on the linear array.

[0026] Optionally, the near-terahertz cabinet, the millimeter wave cabinet, and the microwave cabinet are respectively located in different channels in the radio frequency simulation array.

[0027] The present application also provides an embodiment of a multimode signal decomposition and simulation method for a radio frequency target, which is applicable to the multimode signal decomposition and simulation system for a radio frequency target described in the above embodiment, and includes: Step 1: The target position is simulated by means of triple antenna vector synthesis. The microwave triple antenna, millimeter wave triple antenna, and near-terahertz triple antenna are arranged in an interlaced and overlapping manner so that the triple antennas of the near-terahertz band, millimeter wave band, and microwave band have overlapping parts in spatial position, thereby having the ability to simulate different frequency band signals generated by the target in the same direction, as shown in the reference. Figure 3 As shown; Step 2: The block diagram of single target position simulation is as follows Figure 4 As shown, the single target position simulation is realized by three-element vector synthesis. The signal simulation device provides a target echo signal to the first precision position chassis in the microwave cabinet. The first precision position chassis splits the target echo signal into three signals corresponding to branch A, branch B, and branch C respectively. The phase shifter and digitally controlled attenuator are adjusted according to the calibration table to ensure that the initial phases of all antennas in the microwave triplet antenna corresponding to the three signals are consistent. The control unit calculates the phase shift value and attenuation value corresponding to the target position to be simulated by the microwave antenna according to the three-element vector synthesis algorithm, and adjusts the phase shifter and digitally controlled attenuator on the basis of phase consistency, thereby realizing the single target position simulation. Step 3: Composite Target Signal Simulation: Within the system, the near-terahertz cabinet, millimeter-wave cabinet, and microwave cabinet are all independent control cabinets, capable of independently simulating target positions in their respective bands. By simultaneously controlling the precision positioning chassis within each cabinet to adjust the signal amplitude and phase, each of the three bands independently simulates the same target position. Simultaneously, the same target position is simulated across all three bands, completing composite target signal simulation. Simultaneously, signal simulation equipment provides input to the near-terahertz cabinet, millimeter-wave cabinet, and microwave cabinet based on signals radiated by the same radar electronics. The target position simulated by the microwave antenna, millimeter-wave antenna, and near-terahertz antenna is the same angular position.

[0028] This application can simulate scenarios where the same radar electronic device generates multiple signals, and multiple signals are radiated from the same position, thereby simulating scenarios where the same RF target generates multiple signals.

[0029] This application also provides an implementation example: Using the composite target signal simulation technology in the microwave darkroom, we simulate the scenario where multiple signals are generated by the same radar electronic equipment, and multiple signals are radiated from the same position, so as to simulate the scenario where multiple signals are generated by the same target. This example uses the composite target signal simulation technology in the microwave darkroom to design the RF simulation array layout and develop software. The implementation process is as follows: Figure 5 As shown: The signal simulation device simulates multiple signals generated by the same radar electronic equipment, and then gives them to the near-terahertz cabinet, millimeter wave cabinet, and microwave cabinet respectively. It then provides array control software to set the target positions that need to be simulated in different bands. Finally, the signal is radiated through the RF simulation array, and multiple signals at the same position are represented.

[0030] Step 1: RF simulation array antenna layout The layout diagram of the RF simulation array antenna is as follows: Figures 6 to 9 As shown, Figures 6 to 9 In the figure, points of the same color represent the same antenna, and each point represents an antenna. Figure 6 、 Figure 7 、 Figure 8 and Figure 9 There are three different colors in the picture, and the corresponding antenna layouts are the planar array of the microwave band, the linear array of the millimeter wave band, the planar array of the near-terahertz band, and the planar arrays corresponding to the three frequency bands (microwave band, millimeter wave band, and near-terahertz band). Figure 6 The three antennas in Figure 1(b) correspond to Figure 3 Microwave antennas and Figure 4 The antennas corresponding to the three branches are: Figure 7 The three antennas in Figure 1(b) correspond to Figure 3 Millimeter wave antennas in Figure 4The antennas corresponding to the three branches are: Figure 8 The three antennas in Figure 1(b) correspond to Figure 3 Because the near-terahertz band linear array is located within the millimeter-wave and microwave bands, a target can be simulated at any position on the near-terahertz band linear array. The simulated angle range is ±5° in azimuth and 0.2° in elevation. This allows the simulation of three signals generated by the same target: the radar signal carried by the target, the target echo signal, and the high-frequency characteristic signal of the target platform's infrared characteristics.

[0031] Step 2: RF simulation array cabinet layout And arrange the array chassis reasonably.

[0032] Step 3: Composite target signal simulation settings By setting the target positions of the three bands, namely the near-terahertz band, microwave band and millimeter wave band, to the same angular position, the radar signal, target echo signal and high-frequency characteristic signal of the infrared characteristics of the target platform generated by the same target can be simulated, thereby realizing the composite target signal simulation.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present application should be included in the scope of protection of the claims of the present application.

Claims

1. A multimode signal decomposition and simulation system for radio frequency targets, characterized in that: It includes a signal simulation device, a radio frequency simulation array and a control unit; the radio frequency simulation array includes a near-terahertz cabinet, a millimeter wave cabinet, a microwave cabinet and a radio frequency simulation array; the radio frequency simulation array includes a microwave antenna, a millimeter wave antenna and a near-terahertz antenna; the signal simulation device is connected to the microwave cabinet, the millimeter wave cabinet and the near-terahertz cabinet respectively; the microwave cabinet, the millimeter wave cabinet and the near-terahertz cabinet are connected to the microwave antenna, the millimeter wave antenna and the near-terahertz antenna respectively; The signal simulation device is used to simulate the first signal, the second signal, and the third signal in the microwave band generated by the target and input them into the millimeter wave cabinet, the microwave cabinet, and the near-terahertz cabinet in the radio frequency simulation array respectively; the radio frequency signal is a radar signal in the microwave band; the target is the same radar electronic equipment; the first signal is the radar signal, the second signal is the target echo signal, and the third signal is a high-frequency characteristic signal of the infrared characteristics of the target platform; The control unit is used to generate control instructions according to the target position to be simulated and send them to the microwave cabinet, millimeter wave cabinet, and near-terahertz cabinet respectively; The microwave cabinet is used to send the first signal of the microwave band it receives to the corresponding microwave antenna; the millimeter wave cabinet and the near-terahertz cabinet are used to convert the second signal and the third signal of the microwave band they receive into the first signal of the millimeter wave band and the third signal of the near-terahertz band, respectively, and send them to the corresponding millimeter wave antenna and the near-terahertz antenna, respectively; The control unit is used to control the microwave triplet antenna, millimeter wave triplet antenna and near-terahertz triplet antenna respectively to perform vector synthesis of the signals they receive, thereby realizing signal radiation in the target microwave, millimeter wave and near-terahertz frequency bands.

2. The multimode signal decomposition and simulation system for radio frequency targets according to claim 1, characterized in that: The microwave triplet antenna consists of three equilaterally arranged microwave antennas; the millimeter wave triplet antenna consists of three equilaterally arranged microwave antennas; and the near-terahertz triplet antenna consists of multiple near-terahertz antennas located on the same straight line.

3. The multimode signal decomposition and simulation system for radio frequency targets according to claim 1, characterized in that: The microwave cabinet is used to perform correlation processing on the first signal of the microwave band sent by the received signal simulation device according to the received control instruction, and then send it to the microwave antenna; the correlation processing includes phase shifting and amplitude attenuation; The millimeter wave cabinet is used to perform correlation processing on the second signal in the microwave band sent by the received signal simulation device according to the received control instruction, convert the correlated processed signal into a second signal in the millimeter wave band, and send it to the millimeter wave antenna; the correlation processing includes phase shifting and amplitude attenuation; The near-terahertz cabinets are respectively used to perform correlation processing on the third signal in the microwave band sent by the received signal simulation device according to the received control instructions, convert the correlated processed signal into the third signal in the near-terahertz band and send it to the near-terahertz antenna; the correlation processing includes phase shifting and amplitude attenuation.

4. The multimode signal decomposition and simulation system for radio frequency targets according to claim 1, characterized in that: The microwave cabinet includes a first precision chassis and a first antenna switch matrix connected in sequence; the signal simulation device is connected to the first antenna switch matrix through the first precision chassis; the first switch matrix is ​​connected to the microwave antenna in a one-to-one correspondence; the first precision chassis includes a power divider, a phase shifter and a digitally controlled attenuator; The power dividers are connected to the digitally controlled attenuators through phase shifters respectively; The phase shifter and the digitally controlled attenuator correspond one to one; The power splitter in the first precision chassis is used to receive the radar signal in the microwave band provided by the signal simulation device, and then send it to the multiple phase shifters in the first precision chassis respectively; The control unit is used to obtain the phase shift value and attenuation value required by the phase shifter and the digitally controlled attenuator in the first precision position chassis respectively using a three-element vector synthesis method according to the target position required to be simulated by the microwave antenna, and send the obtained phase shift value and attenuation value as control instructions to the phase shifter and the digitally controlled attenuator in the first precision position chassis, thereby adjusting the phase shifter and the digitally controlled attenuator to realize target position simulation, thereby realizing target simulation carrying radar signals; The control unit is also used to control the switching of the first antenna switch matrix according to the target position required to be simulated by the microwave antenna, select the corresponding microwave triplet antenna, and ensure that the simulated target position falls within the microwave triplet antenna; the microwave triplet antenna is composed of three equilaterally arranged microwave antennas.

5. The multi-mode signal decomposition and simulation system for radio frequency targets according to claim 1, characterized in that: The millimeter wave cabinet includes a second precision chassis, a second antenna switch matrix, and a millimeter wave frequency conversion component connected in sequence; the signal simulation device is connected to the millimeter wave antenna through the second precision chassis, the second antenna switch matrix, and the millimeter wave frequency conversion component in sequence; the second precision chassis includes a power divider, a phase shifter, and a digitally controlled attenuator; The power dividers are connected to the digitally controlled attenuators through phase shifters respectively; The phase shifter and the digitally controlled attenuator correspond one to one; The power splitter in the second precision chassis is used to receive the radar signal in the microwave band provided by the signal simulation device, and then send it to the multiple phase shifters in the second precision chassis respectively; The control unit is used to obtain the phase shift value and attenuation value required by the phase shifter and digitally controlled attenuator in the second precision position chassis respectively using a three-element vector synthesis method according to the target position required to be simulated by the millimeter wave antenna, and send the obtained phase shift value and attenuation value as control instructions to the phase shifter and digitally controlled attenuator in the second precision position chassis, thereby adjusting the phase shifter and digitally controlled attenuator to achieve target position simulation, thereby achieving target simulation carrying the target echo signal; The control unit is also used to control the switching of the second antenna switch matrix according to the target position required to be simulated by the millimeter-wave antenna, select the corresponding millimeter-wave triplet antenna, convert the microwave signal output by the digitally controlled attenuator into a millimeter-wave signal and radiate it to the selected millimeter-wave triplet antenna, to ensure that the simulated target position falls within the millimeter-wave triplet antenna; the millimeter-wave triplet antenna is composed of three equilaterally arranged millimeter-wave antennas.

6. The multimode signal decomposition and simulation system for radio frequency targets according to claim 1, characterized in that: The near-terahertz cabinet includes a third precision chassis, a third antenna switch matrix, and a near-terahertz frequency conversion component connected in sequence; the signal simulation device is connected to the near-terahertz antenna through the third precision chassis, the third antenna switch matrix, and the near-terahertz frequency conversion component in sequence; the third precision chassis includes a power divider, a phase shifter, and a digitally controlled attenuator; The power dividers are connected to the digitally controlled attenuators through phase shifters respectively; The phase shifter and the digitally controlled attenuator correspond one to one; The power splitter in the third precision chassis is used to receive the radar signal in the microwave band provided by the signal simulation device, and then send it to multiple phase shifters in the third precision chassis respectively; The control unit is used to obtain the phase shift value and attenuation value required by the phase shifter and the digitally controlled attenuator in the third precision position chassis respectively using a three-element vector synthesis method according to the target position required to be simulated by the near-terahertz antenna, and send the obtained phase shift value and attenuation value as control instructions to the phase shifter and the digitally controlled attenuator in the third precision position chassis, thereby adjusting the phase shifter and the digitally controlled attenuator to achieve target position simulation, thereby achieving target simulation of the high-frequency characteristics of the infrared characteristics of the target platform; The control unit is further configured to control the switching of the third antenna switch matrix according to the target position to be simulated by the near-terahertz antenna, select the corresponding near-terahertz triplet antenna, convert the microwave signal output by the digitally controlled attenuator into a near-terahertz signal, and radiate it to the selected near-terahertz triplet antenna, thereby ensuring that the simulated target position falls within the near-terahertz triplet antenna. The near-terahertz triplet antenna consists of multiple near-terahertz antennas located on the same straight line.

7. The multimode signal decomposition and simulation system for radio frequency targets according to any one of claims 1 to 6, characterized in that: The microwave triplet antenna, millimeter wave triplet antenna, and near-terahertz triplet antenna are arranged in an staggered and overlapping manner, so that the triplet antennas in the microwave band, millimeter wave band, and near-terahertz band have overlapping parts in spatial position, thereby enabling the RF simulation array to simulate signals of different frequency bands generated by targets in the same direction.

8. The multimode signal decomposition and simulation system for radio frequency targets according to any one of claims 1 to 6, characterized in that: The microwave triplet antenna and the millimeter wave triplet antenna are both planar arrays, and the near-terahertz triplet antenna is a linear array; the linear array is located in the planar array, and a target can be simulated at any position on the linear array.

9. The multimode signal decomposition and simulation system for radio frequency targets according to any one of claims 1 to 6, characterized in that: The near-terahertz cabinet, millimeter wave cabinet, and microwave cabinet are located in different channels in the RF simulation array.

10. A multimode signal decomposition and simulation method for a radio frequency target, applicable to the multimode signal decomposition and simulation system for a radio frequency target according to any one of claims 1 to 9, characterized in that: include: Step 1: Simulate the target location by synthesizing triple antenna vectors, and arrange the microwave triple antenna, millimeter wave triple antenna, and near-terahertz triple antenna in an interlaced and overlapping manner; Step 2: The signal simulation device provides a target echo signal to the first precision position chassis in the microwave cabinet. The first precision position chassis splits the target echo signal into three signals and adjusts the phase shifter and digitally controlled attenuator according to the calibration table to ensure that the initial phases of all antennas in the microwave triplet antenna corresponding to the three signals are consistent. The control unit calculates the phase shift and attenuation values ​​corresponding to the target position to be simulated by the microwave antenna based on the triplet vector synthesis algorithm. Based on the phase consistency, the control unit adjusts the phase shifter and digitally controlled attenuator to achieve single target position simulation. Step 3: Based on step 2, the millimeter wave antenna and the near-terahertz antenna are analogous to the target positions they need to simulate, so that the radar signal, target echo signal and high-frequency characteristic signal of the infrared characteristics of the target platform generated by the same target can be simulated, thereby realizing the composite target signal simulation; the target positions required to be simulated by the microwave antenna, millimeter wave antenna and near-terahertz antenna are the same angular position.

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