Moving target tracking verification system for phased array

Abstract

The invention discloses a moving target tracking verification system for a phased array. The moving target tracking verification system is composed of a sending end and a receiving end. The transmitting end comprises a moving target entity, a transmitting end frequency source module and an omnidirectional antenna module; the receiving end comprises a phase control array module, a power detection module, a control module and a reference module; the control module is connected with the phase control array module, the power detection module and the reference module; the transmitting end frequency source module generates a radio frequency signal and uniformly radiates the radio frequency signal to a free space through the omnidirectional antenna module; the free space electromagnetic wave signal is received by the phase control array module and then is output to the power detection module, or the free space electromagnetic wave signal is output to the power detection module after down-conversion processing and is converted into a digital / analog signal to be output to the control module; the reference module obtains direction angle information of a moving target entity of a sending end in real time and transmits the direction angle information to the control module to serve as reference information for data processing. The sending end and the receiving end are composed of a plurality of independent modules and are allowed to be combined, adjusted and replaced according to different requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of phased array target tracking, and in particular to a low-cost, low-complexity, and high-flexibility moving target tracking and verification system for phased arrays. Background Art

[0002] Phased arrays are widely used in radar detection, satellite positioning, wireless communications and other important fields due to their flexible beamforming and fast beam scanning capabilities. With the increasing demand for real-time response in wireless communication systems, especially in moving target tracking and multi-user scenarios, the precise beamforming and fast beam switching capabilities of phased arrays have become an important performance indicator.

[0003] Traditionally, beamforming tests are usually conducted in a microwave darkroom. Although this method can obtain accurate beam characteristics in a laboratory environment, it is not intuitive enough to fully demonstrate the dynamic performance of the system in real applications. The beam switching time is usually calculated by summing the electronic switching time of each component, but these data are limited to theoretical calculations and do not fully reflect the response of the phased array system to fast beam switching in actual operation.

[0004] Real-time target tracking is often used as an intuitive way to comprehensively evaluate the beam performance of phased array systems. By evaluating indicators such as target tracking accuracy and misjudgment rate, the performance of the phased array such as beamforming effect and beam switching time can be effectively reflected. However, traditional real-time target tracking systems usually require complex communication protocols between the target and the phased array, and lack the correct target position as a reference for judgment. The system integration process is cumbersome, the development cycle is long, and the flexibility is limited. With the increase in testing needs, existing test solutions have been unable to meet the needs of rapid development and efficient verification in complex environments. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings and defects of the prior art and provide a motion target tracking verification system for phased arrays. The motion target tracking verification system is a phased array target tracking system with a simple structure and high speed, which can realize comprehensive verification of the phased array beamforming capability, including beam pointing accuracy, sidelobe level and fast beam switching capability in real scenarios. The present invention can not only more intuitively demonstrate the dynamic response capability of the system, but also has the advantages of low cost, low complexity and high flexibility.

[0006] A motion target tracking verification system for phased arrays is composed of a transmitting end and a receiving end; the transmitting end includes a mobile target entity, a transmitting end frequency source module, and an omnidirectional antenna module; the receiving end includes a phased array module, a power detection module, a control module, and a reference module; the control module is connected to the phased array module, the power detection module, and the reference module; at the transmitting end, the transmitting end frequency source module generates a radio frequency signal and radiates it equally to the free space through the omnidirectional antenna module; at the receiving end, the electromagnetic wave signal in the free space is received by the phased array module and then output to the power detection module, or is output to the power detection module after down-conversion processing, and the power detection module detects the output signal power and converts it into a digital / analog signal and outputs it to the control module; the reference module is used to obtain the directional angle information of the mobile target entity at the transmitting end in real time and transmit it to the control module as reference information for data processing.

[0007] The phased array module works in a receiving mode, has at least one radio frequency interface, and has at least one digital / analog control interface; the digital / analog control interface modifies the phase shift value of the phase shifter by digital / analog control to control the phased array beam pointing;

[0008] The phased array module is implemented by a phased array fed by a physical circuit, and has a feeding network, a phase shifter, and an antenna array; the feeding network, the phase shifter, and the antenna array are connected in sequence, and at the receiving end, the electromagnetic wave signal in the free space received by the antenna array of the antenna array module is sent to the phase shifter, and the phase shifter adjusts the phase of the signal according to the instruction of the control interface, and then forms a synthetic signal output through the feeding network;

[0009] The phased array module is implemented by a spatially fed reconfigurable transmission array or a reconfigurable reflection array, and has an antenna array consisting of a feed source and a reconfigurable transmission / reflection unit.

[0010] The reference module includes a high-definition optical camera and a computer. The high-definition optical camera is used to obtain real-time images of the target moving entity and output them to the computer through a digital interface. The computer obtains real-time angular information of the moving target entity through a software algorithm and transmits it to the control module.

[0011] Among them, the control module includes a processor, and the processor includes a single-chip microcomputer or an FPGA; the transmitting end frequency source module includes an evaluation board composed of a commercial frequency source instrument or a commercial frequency source chip; and the power detection module includes a commercial power detection chip and its peripheral circuits.

[0012] When the operating frequency of the phased array module is within the operating frequency range of the power detection module, the receiving end is composed of a phased array module, a power detection module, a control module and a reference module.

[0013] Wherein, when the operating frequency of the phased array module is not within the operating frequency range of the power detection module, the receiving end is composed of a phased array module, a power detection module, a receiving end frequency source module, a down-conversion module, a control module and a reference module; the down-conversion module has a radio frequency input interface, a local oscillator input interface and an intermediate frequency output interface; the receiving end frequency source module is connected to the local oscillator input interface of the down-conversion module to provide a local oscillator signal, and the radio frequency input interface of the down-conversion module is connected to the radio frequency output interface of the phased array module; the intermediate frequency output interface of the down-conversion module is connected to the radio frequency input interface of the power detection module;

[0014] At the receiving end, the electromagnetic wave signal received in the free space is received by each antenna unit of the antenna array module, and passes through the phase shifter. After the phase shifter adjusts the phase of the signal according to the instruction of the control interface, a synthetic signal is formed through the feeding network and output to the down-conversion module through the RF interface for down-conversion processing, so that the operating frequency of the synthetic signal is within the operating frequency range of the power detection module, and then sent to the power detection module for processing.

[0015] Wherein, the down-conversion module is implemented by cascading a mixer and a filter.

[0016] Among them, in the receiving end, the phased array module covers the specified spatial range θ∈[θ min ,θ max ], Each pointing beam contains directional angle information θ, N should satisfy the following relationship:

[0017]

[0018] In the formula, Δθ and are respectively at θ and Tracking angular resolution in both directions.

[0019] When performing target tracking verification, three indicators, namely beam pointing accuracy, sidelobe level, and beam switching time, are qualitatively evaluated. The evaluation process is divided into two processes: stationary target tracking verification and moving target tracking verification:

[0020] When tracking a stationary target beam, first set the beam switching time to an appropriate value, making it greater than the beam complete establishment time. At this time, the beam switching time is not an evaluation indicator. The beam pointing accuracy and sidelobe level are qualitatively evaluated through the following steps:

[0021] S1. Randomly place stationary targets, and the control module reads the current direction angle information of the moving target entity output by the reference module and store;

[0022] S2. The control module controls the phased array module to generate a specific directional beam;

[0023] S3. The control module reads the digital / analog output value of the power detection module and its corresponding beam pointing direction angle information and stores it;

[0024] S4. Repeat steps S2-S3 until N beams have scanned the specified spatial range, and N different power values ​​and their corresponding beam pointing direction angle information are obtained;

[0025] S5. Select the beam pointing direction angle information corresponding to the maximum power value As the directional angle information of the current phased array tracking the stationary target;

[0026] S6. Repeat steps S1-S5 M times. When m% or more times meet the following conditions, it is considered that the current beam pointing accuracy and sidelobe level meet the tracking requirements. m% is the tracking success rate threshold.

[0027]

[0028] Through the above steps, it is determined that the beam pointing accuracy and sidelobe level meet the tracking requirements, and the beam switching time is gradually shortened. Steps S1-S6 are performed at different beam switching times. When the tracking success rate begins to be less than m%, the beam switching time T at this time is recorded. min , T min That is, the minimum stationary target beam tracking time that meets the system requirements.

[0029] When the static target tracking meets the system requirements, the moving target tracking verification is carried out, which is achieved through the following steps:

[0030] S21. Control the moving object to move freely in the specified space at a constant speed V, and set the beam switching time to T, T≤T min ;

[0031] S22. The control module reads the current direction angle information of the moving target entity output by the reference module And store, record the current time as t1;

[0032] S23. The control module controls the phased array module to generate a specific directional beam;

[0033] S24. The control module reads the digital / analog output value of the power detection module and its corresponding beam pointing direction angle information and stores it;

[0034] S25. Repeat steps S23-S24 until N beams have scanned the specified spatial range, and N different power values ​​and their corresponding beam pointing direction angle information are obtained;

[0035] S26. The control module records the current time t2 and reads the current direction angle information of the moving target entity output by the reference module and store;

[0036] S27. Select the beam pointing direction angle information corresponding to the maximum power value As the directional angle information of the current phased array tracking target;

[0037] S28. The control module performs data comparison and processing;

[0038] S29. When both the beam pointing accuracy and the sidelobe level are optimal, repeat steps S21-S28 M times. When m% or more times meet the following conditions, it is considered that the current beam switching time T meets the beam tracking requirements when the object motion speed is V in the current scene;

[0039]

[0040] In the formula, Δθ and are respectively at θ and Tracking angular resolution in both directions;

[0041] Among them, the beam switching time T is the minimum beam switching time T min , so that the moving speed of the moving object gradually increases, and at each moving speed, steps S21-S28 are repeated. When the tracking success rate begins to be less than m%, the object's moving speed V at this time is recorded. max , V max That is, the object's movement speed that satisfies the system's maximum tracking capability;

[0042] Wherein, in step S5 and step S27, the selected maximum power value is further input into the path loss model to calculate the straight-line distance S between the moving target entity and the center of the phased array module;

[0043] The calculation of the straight-line distance S between the mobile target entity and the center of the phased array module is determined by establishing a path loss model of the power value output between the path and the power detection module, and the obtained current power value is brought into the path loss model to calculate the straight-line distance S between the mobile target entity and the center of the phased array module.

[0044] The low-complexity phased array target tracking verification system proposed in the present invention simplifies the processing flow of the traditional real-time target tracking system, which requires complex communication protocol collaboration between the phased array and the mobile target to obtain the target signal strength indication, by introducing a power detection module, thereby reducing system complexity and improving operational convenience. By introducing a reference module, the beamforming effect and beam switching time are qualitatively evaluated by the accuracy and error rate of beam tracking targets, and the results are more intuitive.

[0045] The highly flexible phased array target tracking and verification system provided by the present invention has a transmitting end and a receiving end both composed of multiple independent modules, allowing users to combine, adjust and replace modules according to different needs, so that the system has flexibility in different application scenarios and can meet different testing and verification needs.

[0046] The low-cost phased array target tracking verification system provided by the present invention effectively reduces hardware investment and reduces the construction and operation costs of the overall system by using low-cost commercial modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic diagram of a moving target tracking verification system of a millimeter wave phased array according to the first embodiment of the present invention.

[0048] Figure 2 It is a motion orientation diagram of a moving target tracking verification system of a millimeter wave phased array according to the first embodiment of the present invention.

[0049] Figure 3 It is a flow chart of the stationary target tracking verification system of the millimeter wave phased array according to the first embodiment of the present invention.

[0050] Figure 4 It is a flow chart of the moving target tracking verification system of the millimeter wave phased array according to the first embodiment of the present invention.

[0051] Figure 5 It is a schematic diagram of a moving target tracking verification system of a 2.4G phased array according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0053] The first embodiment of the present invention is a moving target tracking verification system of a millimeter wave phased array. The second embodiment of the present invention is a moving target tracking verification system of a 2.4G phased array.

[0054] like Figure 1 As shown, Figure 1It is a principle block diagram of a motion target tracking verification system of a millimeter wave phased array according to the first embodiment of the present invention, including a transmitting end and a receiving end. The transmitting end includes a mobile target entity, a frequency source module, and an omnidirectional antenna module. The receiving end includes a phased array module, a frequency source module, a down-conversion module, a power detection module, a control module, and a reference module.

[0055] Specifically, the scale of the antenna array in the phased array module in the first embodiment of the present invention is 10*10, which can operate in two frequency bands of 28 GHz and 39 GHz. It has a power synthesizer and a 6-bit vector synthesis phase shifter. When operating in the receiving mode, the phase shifter state can be controlled by the SPI protocol to achieve the purpose of beamforming.

[0056] Specifically, the down-conversion module in the first embodiment of the present invention has a local oscillator input interface, a radio frequency input interface and an intermediate frequency output interface. The radio frequency input interface of the down-conversion module is connected to the radio frequency interface of the phased array module through a coaxial line. The intermediate frequency output interface of the down-conversion module is connected to the radio frequency input interface of the commercial power detection module through a coaxial line.

[0057] Specifically, the frequency source modules of the transmitting end and the receiving end in the first embodiment of the present invention are LMX2595 chip evaluation boards of Texas Instruments, which can output a maximum of 20GHz signals. In the first embodiment of the present invention, a frequency multiplier is connected to the LMX2595 chip evaluation board to output a 30.4GHz signal. At the receiving end, the output port of the frequency source module is connected to the local oscillator input interface of the down-conversion module through a coaxial line. At the transmitting end, the output port of the frequency source module is connected to the omnidirectional antenna module through a radio frequency connector.

[0058] Specifically, the power detection module in the first embodiment of the present invention uses a commercial power detection module, which is an evaluation board of the AD8317 logarithmic power detection chip of Analog Devices, and has an operating frequency of 1 MHz to 10 GHz, and can convert the input signal power into an analog voltage signal output.

[0059] Specifically, the control module in the first embodiment of the present invention is an STM32F103ZET6 development board, whose main control chip is a 32-bit single-chip microcomputer based on the ARM Cortex-M3 core of STMicroelectronics with a main frequency of up to 72MHz, and has peripheral interfaces such as ADC, SPI, and GPIO.

[0060] Specifically, the reference module in the first embodiment of the present invention is a high-definition optical camera and a computer. The computer is a personal computer. By running a target tracking program on the personal computer, the actual angular direction information of the moving target is acquired in real time and output through the COM port.

[0061] Specifically, the control module in the first embodiment of the present invention connects its own ADC input interface and the analog output interface of the commercial power detection module through a DuPont line, and connects its own SPI control interface and the SPI control interface of the phased array module through a DuPont line.

[0062] The tracking angle resolution of the beam pointing of the first embodiment of the present invention is 10°, and the scanning space range is θ∈[50°,130°], The total number of beams N is greater than or equal to 81, meeting the scanning requirements.

[0063] Figure 2 It is the spatial geometric position relationship between the transmitting end and the receiving end in the first embodiment of the present invention.

[0064] Specifically, the path loss model of the first embodiment in this embodiment is obtained by establishing a mathematical fitting model between the voltage value output by the commercial power detection module and the target distance S of the phased array center position.

[0065] During target tracking verification, three indicators, namely beam pointing accuracy, sidelobe level and beam switching time, are qualitatively evaluated. The evaluation process is divided into two processes: static target tracking verification and moving target tracking verification.

[0066] like Figure 3 As shown, the first embodiment of the present invention performs stationary target tracking verification, comprising the following steps:

[0067] When performing beam tracking of a stationary target, the beam switching time is first set to an appropriate value, which is greater than the beam complete establishment time. At this time, the beam switching time is not an evaluation indicator. The beam pointing accuracy and sidelobe level are qualitatively evaluated through the following steps:

[0068] S1. Randomly place stationary targets, and the control module reads the current direction angle information of the moving target entity output by the reference module and store;

[0069] S2. The control module controls the phased array module to generate a specific directional beam;

[0070] S3. The control module reads the digital / analog output value of the power detection module and its corresponding beam pointing direction angle information and stores it;

[0071] S4. Repeat steps S2-S3 until N beams have scanned the specified spatial range, and N different power values ​​and their corresponding beam pointing direction angle information are obtained;

[0072] S5. Select the beam pointing direction angle information corresponding to the maximum power value As the directional angle information of the current phased array tracking the stationary target;

[0073] S6. Repeat steps S1-S5 1000 times. When more than 95% of the times meet the following conditions, it is considered that the current beam pointing accuracy and sidelobe level meet the tracking requirements.

[0074]

[0075] Through the above steps, it is determined that the beam pointing accuracy and sidelobe level meet the tracking requirements. The beam switching time is gradually shortened. Steps S1-S6 are performed at different beam switching times. When the tracking success rate begins to be less than 95%, the beam switching time T at this time is recorded. min , T min That is, the minimum stationary target beam tracking time that meets the system requirements.

[0076] Wherein, in step S5, the selected maximum power value is further input into the path loss model to calculate the straight-line distance S between the moving target entity and the center of the phased array module;

[0077] The calculation of the straight-line distance S between the mobile target entity and the center of the phased array module is determined by establishing a path loss model of the power value output between the path and the power detection module, and the current power value is brought into the path loss model to calculate the straight-line distance S between the mobile target entity and the center of the phased array module. Figure 4 As shown, in the first embodiment of the present invention, when the beamforming effect and beam switching time in the stationary target tracking verification meet the system requirements, the moving target tracking verification is performed through the following steps:

[0078] S21. Control the moving object to move freely in the specified space at a constant speed V, and set the beam switching time to T, T satisfies the condition T≤T min ;

[0079] S22. The control module reads the current direction angle information of the moving target entity output by the reference module And store, record the current time as t1;

[0080] S23. The control module controls the phased array module to generate a specific directional beam;

[0081] S24. The control module reads the digital / analog output value of the power detection module and its corresponding beam pointing direction angle information and stores it;

[0082] S25. Repeat steps S22-S24 until N beams have scanned the specified spatial range, and N different power values ​​and their corresponding beam pointing direction angle information are obtained;

[0083] S26. The control module records the current time t2 and reads the current direction angle information of the moving target entity output by the reference module and store;

[0084] S27. Select the beam pointing direction angle information corresponding to the maximum power value As the directional angle information of the current phased array tracking target, the straight-line distance S between the moving target entity and the center of the phased array module is calculated;

[0085] S28. Control module data processing;

[0086] S29. Repeat steps S21-S28. When more than 95% of the times meet the following conditions, it is considered that the current beam switching time T meets the beam tracking requirements when the object motion rate is V in the current scene;

[0087]

[0088] In the formula, Δθ and are respectively at θ and Tracking angular resolution in both directions.

[0089] Among them, when the beam switching time T is the minimum beam switching time T min , so that the moving speed of the moving object gradually increases, and the above steps S21-S29 are repeated at different moving speeds each time. When the tracking success rate begins to be less than 95%, the object's moving speed V at this time is recorded. max , V max That is, the object movement rate that meets the system's maximum tracking capability;

[0090] Wherein, in step S27, the selected maximum power value is further input into the path loss model to calculate the straight-line distance S between the moving target entity and the center of the phased array module;

[0091] The calculation of the straight-line distance S between the mobile target entity and the center of the phased array module is determined by establishing a path loss model of the power value output between the path and the power detection module, and the obtained current power value is brought into the path loss model to calculate the straight-line distance S between the mobile target entity and the center of the phased array module.

[0092] Through the two processes of stationary target tracking verification and moving target tracking verification, the beamforming effect can be qualitatively evaluated, and the minimum beam switching time and the object's movement rate under the system's maximum tracking capability can be determined.

[0093] Figure 5 It is a schematic diagram of a moving target tracking verification system of a 2.4G phased array according to the second embodiment of the present invention.

[0094] Specifically, the antenna array in the phased array module in the second embodiment of the present invention is a circularly polarized antenna with a scale of 8*8, can operate in the 2.4GHz frequency band, has a power synthesizer, and a 7-bit reflective phase shifter, and can control its phase shifter state through the MIPI protocol to achieve the purpose of beamforming.

[0095] Different from the first embodiment, the operating frequency of the phased array module in the second embodiment is within the operating frequency range of the commercial power detection module. Therefore, the receiving end in the second embodiment does not need a down-conversion module and a commercial frequency source module, and the power detection module is directly connected to the phased array module.

[0096] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0097] Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that all changes falling within the meaning and range of equivalent elements of the claims are included in the present invention.

[0098] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Phased array oriented moving target tracking verification system, characterized by: It consists of a transmitting end and a receiving end; the transmitting end includes a mobile target entity, a transmitting end frequency source module, and an omnidirectional antenna module; the receiving end includes a phased array module, a power detection module, a control module, and a reference module; the control module is connected to the phased array module, the power detection module, and the reference module; at the transmitting end, the transmitting end frequency source module generates a radio frequency signal and radiates it equally to the free space through the omnidirectional antenna module; at the receiving end, the electromagnetic wave signal in the free space is received by the phased array module and then output to the power detection module, or output to the power detection module after down-conversion processing, and the power detection module detects the output signal power and converts it into a digital / analog signal and outputs it to the control module; the reference module is used to obtain the directional angle information of the mobile target entity at the transmitting end in real time and transmit it to the control module as reference information for data processing.

2. The moving target tracking verification system for phased array according to claim 1, characterized in that: The phased array module works in a receiving mode, has at least one radio frequency interface, and has at least one digital / analog control interface; the digital / analog control interface modifies the phase shift value of the phase shifter by digital / analog control to control the phased array beam pointing; The phased array module is implemented by a phased array fed by a physical circuit, and has a feeding network, a phase shifter, and an antenna array; the feeding network, the phase shifter, and the antenna array are connected in sequence, and at the receiving end, the electromagnetic wave signal in the free space received by the antenna array of the antenna array module is sent to the phase shifter, and the phase shifter adjusts the phase of the signal according to the instruction of the control interface, and then forms a synthetic signal output through the feeding network; The phased array module can be implemented by a spatially fed reconfigurable transmission array or a reconfigurable reflection array, and has an antenna array consisting of a feed source and a reconfigurable transmission / reflection unit.

3. The moving target tracking verification system for phased array according to claim 1, characterized in that: The reference module includes a high-definition optical camera and a computer. The high-definition optical camera is used to obtain real-time images of the target moving entity and output them to the computer through a digital interface. The computer obtains real-time angular information of the moving target entity through a software algorithm and transmits it to the control module.

4. The moving target tracking verification system for phased array according to claim 1, characterized in that: The control module includes a processor, which includes a single-chip microcomputer or an FPGA; the transmitting end frequency source module includes an evaluation board composed of a commercial frequency source instrument or a commercial frequency source chip; the power detection module includes a commercial power detection chip and its peripheral circuits.

5. The moving target tracking verification system for phased array according to claim 1, characterized in that: When the operating frequency of the phased array module is within the operating frequency range of the power detection module, the receiving end is composed of the phased array module, the power detection module, the control module and the reference module.

6. The moving target tracking verification system for phased array according to claim 1, characterized in that: When the operating frequency of the phased array module is not within the operating frequency range of the power detection module, the receiving end is composed of a phased array module, a power detection module, a receiving end frequency source module, a down-conversion module, a control module and a reference module; the down-conversion module has a radio frequency input interface, a local oscillator input interface and an intermediate frequency output interface; the receiving end frequency source module is connected to the local oscillator input interface of the down-conversion module to provide a local oscillator signal, and the radio frequency input interface of the down-conversion module is connected to the radio frequency output interface of the phased array module; the intermediate frequency output interface of the down-conversion module is connected to the radio frequency input interface of the power detection module; At the receiving end, the electromagnetic wave signal received in the free space is received by each antenna unit of the antenna array module, and passes through the phase shifter. After the phase shifter adjusts the phase of the signal according to the instruction of the control interface, a synthetic signal is formed through the feeding network and output to the down-conversion module through the RF interface for down-conversion processing, so that the operating frequency of the synthetic signal is within the operating frequency range of the power detection module, and then sent to the power detection module for processing.

7. The moving target tracking verification system for phased array according to claim 6, characterized in that: The down-conversion module is implemented by cascading a mixer and a filter.

8. The moving target tracking verification system for phased array according to claim 1, characterized in that: In the receiving end, the phased array module covers the specified spatial range θ∈[θ min ,θ max ], Each pointing beam contains directional angle information N satisfies the following relationship: In the formula, Δθ and are respectively at θ and Tracking angular resolution in both directions.

9. The moving target tracking verification system for phased array according to claim 1, characterized in that: During target tracking verification, three indicators, namely beam pointing accuracy, sidelobe level and beam switching time, are qualitatively evaluated. The evaluation process is divided into two processes: static target tracking verification and moving target tracking verification. When performing beam tracking of a stationary target, the beam switching time is first set to an appropriate value, which is greater than the beam complete establishment time. At this time, the beam switching time is not an evaluation indicator. The beam pointing accuracy and sidelobe level are qualitatively evaluated through the following steps: S1. Randomly place stationary targets, and the control module reads the current direction angle information of the moving target entity output by the reference module and store; S2. The control module controls the phased array module to generate a specific directional beam; S3. The control module reads the digital / analog output value of the power detection module and its corresponding beam pointing direction angle information and stores it; S4. Repeat steps S2-S3 until N beams have scanned the specified spatial range, and N different power values ​​and their corresponding beam pointing direction angle information are obtained; S5. Select the beam pointing direction angle information corresponding to the maximum power value As the directional angle information of the current phased array tracking the stationary target; S6. Repeat steps S1-S5 M times. When m% or more times meet the following conditions, it is considered that the current beam pointing accuracy and sidelobe level meet the tracking requirements, and m% is the tracking success rate threshold; Through the above steps, it is determined that the beam pointing accuracy and sidelobe level meet the tracking requirements, and the beam switching time is gradually shortened. Steps S1-S6 are performed at different beam switching times. When the tracking success rate begins to be less than m%, the beam switching time Tmin'Tmi at this time is recorded. n To meet the minimum stationary target beam tracking time required by the system; When the static target tracking meets the system requirements, the moving target tracking verification is carried out, which is achieved through the following steps: S21. Control the moving object to move freely in the specified space at a constant speed V, and set the beam switching time to T, T≤Tmi n ; S22. The control module reads the current direction angle information of the moving target entity output by the reference module And store, record the current time as t1; S23. The control module controls the phased array module to generate a specific directional beam; S24. The control module reads the digital / analog output value of the power detection module and its corresponding beam pointing direction angle information and stores it; S25. Repeat steps S23-S24 until N beams have scanned the specified spatial range, and N different power values ​​and their corresponding beam pointing direction angle information are obtained; S26. The control module records the current time t2 and reads the current direction angle information of the moving target entity output by the reference module and store; S27. Select the beam pointing direction angle information corresponding to the maximum power value As the directional angle information of the current phased array tracking target; S28. The control module performs data comparison and processing; S29. When both the beam pointing accuracy and the sidelobe level are optimal, repeat steps S21-S28 M times. When m% or more times meet the following conditions, it is considered that the current beam switching time T meets the beam tracking requirements when the object motion speed is V in the current scene; In the formula, Δθ and are respectively at θ and Tracking angular resolution in both directions; Among them, the beam switching time T is the minimum beam switching time T min , so that the moving speed of the moving object gradually increases, and at each moving speed, steps S21-S28 are repeated. When the tracking success rate begins to be less than m%, the object's moving speed V at this time is recorded. max , V max That is, the object's movement speed that meets the system's maximum tracking capability.

10. The moving target tracking verification system for phased array according to claim 9, characterized in that: In step S5 and step S27, the selected maximum power value is further input into the path loss model to calculate the straight-line distance S between the moving target entity and the center of the phased array module; The calculation of the straight-line distance S between the mobile target entity and the center of the phased array module is determined by establishing a path loss model of the power value output between the path and the power detection module, and the obtained current power value is brought into the path loss model to calculate the straight-line distance S between the mobile target entity and the center of the phased array module.

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