Active phased array radar multi-transmitting and receiving beam testing method and system

Abstract

The present invention discloses a method and system for testing multiple transceiver beams of an active phased array radar. The intermediate frequency transmitting module of the active phased array radar is connected to a near-field probe, which is arranged on a motion mechanism and controlled by a first controller. The first controller is connected to the active phased array radar and a second controller, and the second controller is connected to a signal processing module of the active phased array radar. The active phased array radar and the motion mechanism are located in a microwave darkroom. The first controller + motion mechanism is used to control the near-field probe to move to different sampling points, and at each sampling point, the active phased array radar is used to radiate signals externally and the near-field probe is used to collect data to perform a transmitting multi-beam test. At each sampling point, the active phased array radar is used to generate electromagnetic wave signals, which are radiated externally by the near-field probe, and the active phased array radar is used to collect data to perform a receiving multi-beam test. The present invention solves the problems of time-consuming and cumbersome operation of the traditional beam testing method.

Description

Technical Field

[0001] The invention belongs to the technical field of radar testing, and in particular relates to a method and system for testing multiple transceiver beams of an active phased array radar. Background Art

[0002] At present, when testing the beam of an active phased array radar in a microwave anechoic chamber, the method usually adopted is to test each beam one by one, and each time a beam is tested, it is necessary to manually click to switch the beam, which results in a long time and cumbersome operation to test all the beams. At the same time, when testing the beam of an active phased array radar, the probe RF signal in the microwave anechoic chamber needs to use a signal source or a network analyzer as the source of the RF signal, which increases the cost of the test equipment. Summary of the invention

[0003] The purpose of the present invention is to provide an active phased array radar multi-transceiver beam testing method and system to solve the problems that the existing beam testing method is time-consuming, cumbersome to operate, and requires the use of a radio frequency signal source, which increases the testing cost.

[0004] The present invention solves the above technical problems through the following technical solutions: a method for testing multiple transceiver beams of an active phased array radar, wherein the intermediate frequency transmitting module of the active phased array radar is connected to a near-field probe, the near-field probe is arranged on a motion mechanism, the motion mechanism is controlled by a first controller, the first controller is connected to the active phased array radar and a second controller, and the second controller is connected to a signal processing module of the active phased array radar; the active phased array radar and the motion mechanism are located in a microwave darkroom; the testing method includes transmitting multi-beam testing and receiving multi-beam testing;

[0005] The transmit multi-beam test includes:

[0006] Step A1: the first controller controls the motion mechanism under the control of the second controller, thereby controlling the motion of the near-field probe to align the near-field probe with a sampling point of the antenna array of the active phased array radar;

[0007] Step A2: the first controller sends a first pulse signal to the active phased array radar;

[0008] Step A3: After receiving the first pulse signal, the active phased array radar radiates multiple electromagnetic beams outward through the antenna array; at the same time, the near-field probe collects multiple transmission beam data and feeds the multiple transmission beam data back to the active phased array radar;

[0009] Step A4: the active phased array radar processes the received multiple transmission beam data and sends them to the second controller;

[0010] Step A5: repeating steps A1 to A4 until the acquisition of multiple transmit beam data of all sampling points on the antenna array is completed;

[0011] Step A6: the second controller analyzes the received transmit beam data;

[0012] The receive multi-beam test includes:

[0013] Step B1: the first controller controls the motion mechanism under the control of the second controller, thereby controlling the motion of the near-field probe to align the near-field probe with a sampling point of the antenna array of the active phased array radar;

[0014] Step B2: the first controller sends a second pulse signal to the active phased array radar;

[0015] Step B3: After receiving the second pulse signal, the active phased array radar sends a plurality of electromagnetic wave signals to the near-field probe through the intermediate frequency transmitting module, and the near-field probe radiates a plurality of electromagnetic wave beams externally; at the same time, the active phased array radar collects a plurality of receiving beam data;

[0016] Step B4: the active phased array radar processes the multiple receiving beam data and sends them to the second controller;

[0017] Step B5: repeating steps B1 to B4 until the acquisition of multiple receiving beam data of all sampling points on the antenna array is completed;

[0018] Step B6: The second controller analyzes the received receive beam data.

[0019] Furthermore, the specific process of the first controller controlling the movement of the near-field probe includes:

[0020] Step 1.11: First, control the near-field probe to step to the first position in the horizontal direction, and then control the near-field probe to step to the first position in the vertical direction, so that the near-field probe is aligned with the first sampling point of the antenna array of the active phased array radar;

[0021] Step 1.12: After completing the acquisition of multiple transmission beam data or reception beam data of the first sampling point of the antenna array, control the near-field probe to step to the second position in the vertical direction, so that the near-field probe is aligned with the second sampling point of the antenna array of the active phased array radar;

[0022] Step 1.13: Repeat step 1.12 until the acquisition of multiple transmit beam data or receive beam data of all sampling points in the vertical direction corresponding to the first position in the horizontal direction is completed;

[0023] Step 1.14: Control the near-field probe to move to a second position in the horizontal direction, and repeat steps 1.11 to 1.13 until the acquisition of multiple transmit beam data or receive beam data of all sampling points in the vertical direction corresponding to the second position in the horizontal direction is completed;

[0024] Step 1.15: Control the near-field probe to move to the next position in the horizontal direction, and repeat step 1.14 until the collection of multiple transmit beam data or receive beam data of all sampling points in the vertical direction corresponding to all positions in the horizontal direction is completed.

[0025] Furthermore, the specific process of the first controller controlling the movement of the near-field probe includes:

[0026] Step 1.21: First, control the near-field probe to step to the first position in the vertical direction, and then control the near-field probe to step to the first position in the horizontal direction, so that the near-field probe is aligned with the first sampling point of the antenna array of the active phased array radar;

[0027] Step 1.22: After completing the acquisition of multiple transmission beam data or reception beam data of the first sampling point of the antenna array, control the near-field probe to step to the second position in the horizontal direction, so that the near-field probe is aligned with the second sampling point of the antenna array of the active phased array radar;

[0028] Step 1.23: Repeat step 1.22 until the acquisition of multiple transmit beam data or receive beam data of all sampling points in the horizontal direction corresponding to the first position in the vertical direction is completed;

[0029] Step 1.24: Control the near-field probe to move to a second position in the vertical direction, repeat steps 1.21 to 1.23, and complete the collection of multiple transmit beam data or receive beam data of all sampling points in the horizontal direction corresponding to the second position in the vertical direction;

[0030] Step 1.25: Control the near-field probe to move to the next position in the vertical direction, and repeat step 1.24 until the collection of multiple transmit beam data or receive beam data of all sampling points in the horizontal direction corresponding to all positions in the vertical direction is completed.

[0031] Furthermore, the first pulse signal and the second pulse signal are both positive pulse signals; the active phased array radar automatically switches the beam according to the rising edge of the first pulse signal, and radiates multiple electromagnetic beams outward through the antenna array;

[0032] The active phased array radar automatically switches beams according to the rising edge of the second pulse signal, sends multiple electromagnetic wave signals to the near-field probe through the intermediate frequency transmission module, and the near-field probe radiates multiple electromagnetic beams externally.

[0033] Furthermore, the analysis of the transmit beam data or the receive beam data by the second controller includes beam pattern analysis, beam pointing analysis, beam scanning range analysis, side lobe level analysis, polarization isolation and polarization consistency analysis.

[0034] Based on the same concept, the present invention provides an active phased array radar multi-transceiver beam test system, comprising a first controller, a second controller, a motion mechanism and a near-field probe; the second controller is connected to the active phased array radar and the first controller, the first controller is connected to the active phased array radar and the motion mechanism, the near-field probe is arranged on the motion mechanism and connected to the intermediate frequency transmission module of the active phased array radar; the active phased array radar and the motion mechanism are located in a microwave darkroom;

[0035] The second controller is used to send a control instruction to the first controller so that the first controller controls the motion mechanism to move under the control instruction; and analyze the received transmission beam data and reception beam data;

[0036] The first controller is used to control the motion mechanism to work under the control instruction of the second controller, and then control the movement of the near-field probe to align the near-field probe with different sampling points of the antenna array surface of the active phased array radar; after the near-field probe is aligned with different sampling points of the antenna array surface of the active phased array radar, send the first pulse signal or the second pulse signal to the active phased array radar;

[0037] The active phased array radar is used to radiate multiple electromagnetic beams outward through the antenna array after receiving the first pulse signal; process the multiple transmission beam data fed back by the near-field probe and send them to the second controller; after receiving the second pulse signal, send multiple electromagnetic wave signals to the near-field probe through the intermediate frequency transmission module; collect multiple receiving beam data when the near-field probe radiates multiple electromagnetic beams outward, and process the multiple receiving beam data and send them to the second controller;

[0038] The near-field probe is used to collect multiple transmission beam data when the antenna array radiates multiple electromagnetic beams outward, and feed back the multiple transmission beam data to the active phased array radar; and radiate multiple electromagnetic beams outward according to the multiple electromagnetic wave signals sent by the intermediate frequency transmission module.

[0039] Furthermore, the second controller is connected to the active phased array radar and the first controller through a network switch.

[0040] Furthermore, the motion mechanism includes a base, a horizontal drive mechanism and a vertical drive mechanism, the horizontal drive mechanism is fixedly arranged on the base, the vertical drive mechanism is movably arranged on the horizontal drive mechanism, and the near-field probe is arranged on the vertical drive mechanism.

[0041] Beneficial Effects

[0042] Compared with the prior art, the advantages of the present invention are:

[0043] The present invention uses a first controller + a motion mechanism to control the near-field probe to be located at different sampling points, and after the near-field probe is located at the sampling point, the first controller transmits an in-place pulse signal to the active phased array radar, so that the active phased array radar completes the switching and transmission of all electromagnetic beams at the sampling point, or completes the collection of all receiving beam data at the sampling point before the next in-place pulse signal arrives, thereby realizing multi-beam data collection at each sampling point, and automatically realizing beam switching inside the active phased array radar without manual beam switching, thereby greatly improving the efficiency of multi-beam testing, simplifying beam testing operations, and solving the problems of time-consuming and cumbersome operations of traditional beam testing methods;

[0044] The present invention uses the radio frequency loopback link inside the active phased array radar under test as the source of the radio frequency signal, thereby solving the problem that the radio frequency signal output of the near-field probe in the microwave darkroom needs to rely on an additional radio frequency signal source, and reducing the equipment cost of the multi-beam test; at the same time, the multi-beam data acquisition and processing efficiency of the active phased array radar is high, the movement of the near-field probe will not introduce errors, and the accuracy of the data test is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 It is a schematic diagram of a multi-transmitting and receiving beam test of an active phased array radar in an embodiment of the present invention;

[0047] Figure 2 is a schematic diagram of near-field probe motion control during multi-transmitting and receiving beam testing in an embodiment of the present invention;

[0048] Figure 3 is a timing diagram of multi-transmit beam or multi-receive beam acquisition in an embodiment of the present invention;

[0049] Figure 4 It is the internal radio frequency loopback link of the active phased array radar when transmitting multi-beam test in an embodiment of the present invention;

[0050] Figure 5 It is the internal radio frequency loopback link of the active phased array radar when receiving multi-beam test in the embodiment of the present invention.

[0051] Explanation of the accompanying drawings: 1-second controller, 2-network switch, 3-first controller, 4-active phased array radar, 5-motion mechanism, 6-near-field probe. DETAILED DESCRIPTION

[0052] The following is a clear and complete description of the technical solution in the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] The technical solution of the present application is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0054] Example 1

[0055] At present, when the active phased array radar 4 is tested in a microwave darkroom, it is necessary to test the beams one by one and manually switch the beams, resulting in low test efficiency and cumbersome operation; at the same time, the RF signal of the near-field probe 6 in the microwave darkroom needs to be assisted by a signal source or a network analyzer, resulting in increased testing costs.

[0056] Based on the above technical problems, an embodiment of the present invention provides a method for testing multiple transceiver beams of an active phased array radar. Figure 1 As shown, the intermediate frequency transmitting module of the active phased array radar 4 is connected to the near-field probe 6, the near-field probe 6 is arranged on the motion mechanism 5, the motion mechanism 5 is controlled by the first controller 3, the first controller 3 is connected to the active phased array radar 4 and the second controller 1, the second controller 1 is connected to the signal processing module of the active phased array radar 4; the active phased array radar 4 and the motion mechanism 5 are located in a microwave darkroom. The present invention provides a multi-transceiver beam test method for an active phased array radar, including a transmitting multi-beam test and a receiving multi-beam test.

[0057] Among them, the transmission multi-beam test includes:

[0058] Step A1: the first controller 3 controls the motion mechanism 5 to move under the control of the second controller 1, and further controls the near-field probe 6 to move, so that the near-field probe 6 is aligned with the sampling point of the antenna array surface of the active phased array radar 4;

[0059] Step A2: the first controller 3 sends a first pulse signal to the active phased array radar 4;

[0060] Step A3: After receiving the first pulse signal, the active phased array radar 4 radiates multiple electromagnetic beams outward through the antenna array; at the same time, the near-field probe 6 collects multiple transmission beam data and feeds the multiple transmission beam data back to the active phased array radar 4;

[0061] Step A4: the active phased array radar 4 processes the received multiple transmission beam data and sends them to the second controller 1;

[0062] Step A5: repeating steps A1 to A4 until the acquisition of multiple transmit beam data of all sampling points on the antenna array is completed;

[0063] Step A6: The second controller 1 analyzes the received transmit beam data.

[0064] The receiving multi-beam test includes:

[0065] Step B1: the first controller 3 controls the motion mechanism 5 to move under the control of the second controller 1, and further controls the near-field probe 6 to move, so that the near-field probe 6 is aligned with the sampling point of the antenna array surface of the active phased array radar 4;

[0066] Step B2: the first controller 3 sends a second pulse signal to the active phased array radar 4;

[0067] Step B3: After receiving the second pulse signal, the active phased array radar 4 sends multiple electromagnetic wave signals to the near-field probe 6 through the intermediate frequency transmission module, and the near-field probe 6 radiates multiple electromagnetic wave beams to the outside; at the same time, the active phased array radar 4 collects multiple receiving beam data;

[0068] Step B4: the active phased array radar 4 processes the multiple receiving beam data and sends them to the second controller 1;

[0069] Step B5: repeating steps B1 to B4 until the acquisition of multiple receiving beam data of all sampling points on the antenna array is completed;

[0070] Step B6: The second controller 1 analyzes the received receive beam data.

[0071] The motion mechanism 5 of this embodiment is a two-dimensional motion mechanism 5, including a base, a horizontal drive mechanism and a vertical drive mechanism. The horizontal drive mechanism is fixed on the base, the vertical drive mechanism is movably arranged on the horizontal drive mechanism, and the near-field probe 6 is arranged on the vertical drive mechanism. The near-field probe 6 is driven to move in the horizontal direction by the horizontal drive mechanism, and the near-field probe 6 is driven to move in the vertical direction by the vertical drive mechanism. In a specific embodiment of the present invention, Figure 2 As shown, the specific process of the first controller 3 controlling the movement of the near-field probe 6 includes:

[0072] Step 1.11: First, control the near-field probe 6 to step to the first position in the horizontal direction, and then control the near-field probe 6 to step to the first position in the vertical direction, so that the near-field probe 6 is aligned with the first sampling point of the antenna array surface of the active phased array radar 4. At this time, the near-field probe 6 is located at P11;

[0073] Step 1.12: After completing the acquisition of multiple transmission beam data of the first sampling point of the antenna array, control the near-field probe 6 to step to the second position in the vertical direction, so that the near-field probe 6 is aligned with the second sampling point of the antenna array of the active phased array radar 4. At this time, the near-field probe 6 is located at P12;

[0074] Step 1.13: Repeat step 1.12 until the acquisition of multiple transmit beam data of all sampling points in the vertical direction corresponding to the first position in the horizontal direction is completed, that is, the acquisition of multiple transmit beam data or receive beam data at P11 to P1n is completed;

[0075] Step 1.14: Control the near-field probe 6 to move to the second position in the horizontal direction, repeat steps 1.11 to 1.13, and complete the collection of multiple transmit beam data or receive beam data of all sampling points in the vertical direction corresponding to the second position in the horizontal direction, that is, complete the collection of multiple transmit beam data or receive beam data at P21 to P2n;

[0076] Step 1.15: Control the near-field probe 6 to move to the next position in the horizontal direction, and repeat step 1.14 until the collection of multiple transmit beam data or receive beam data of all sampling points in the vertical direction corresponding to all positions in the horizontal direction is completed.

[0077] At each position in the horizontal direction (n sampling points), the motion mechanism 5 adopts a one-way continuous scanning mode, and the near-field probe 6 on the motion mechanism 5 scans at a low speed along the vertical direction; after completing the data collection at each position in the horizontal direction (n sampling points), the near-field probe 6 quickly descends (no data collection is performed during this process) to allow data collection at the next position in the horizontal direction to be performed.

[0078] In another specific embodiment of the present invention, Figure 2 As shown, the specific process of the first controller 3 controlling the movement of the near-field probe 6 includes:

[0079] Step 1.21: First, control the near-field probe 6 to step to the first position in the vertical direction, and then control the near-field probe 6 to step to the first position in the horizontal direction, so that the near-field probe 6 is aligned with the first sampling point of the antenna array surface of the active phased array radar 4. At this time, the near-field probe 6 is located at P11;

[0080] Step 1.22: After completing the collection of multiple transmission beam data or reception beam data of the first sampling point of the antenna array, control the near-field probe 6 to step to the second position in the horizontal direction, so that the near-field probe 6 is aligned with the second sampling point of the antenna array of the active phased array radar 4. At this time, the near-field probe 6 is located at P21;

[0081] Step 1.23: Repeat step 1.22 until the acquisition of multiple transmit beam data or receive beam data of all sampling points in the horizontal direction corresponding to the first position in the vertical direction is completed, that is, the acquisition of multiple transmit beam data or receive beam data at P11 to Pm1 is completed;

[0082] Step 1.24: Control the near-field probe 6 to move to the second position in the vertical direction, repeat steps 1.21 to 1.23, and complete the collection of multiple transmit beam data or receive beam data of all sampling points in the horizontal direction corresponding to the second position in the vertical direction, that is, complete the collection of multiple transmit beam data or receive beam data at P12 to Pm2;

[0083] Step 1.25: Control the near-field probe 6 to move to the next position in the vertical direction, and repeat step 1.24 until the collection of multiple transmit beam data or receive beam data of all sampling points in the horizontal direction corresponding to all positions in the vertical direction is completed.

[0084] At each position in the vertical direction (m sampling points), the motion mechanism 5 adopts a one-way continuous scanning mode, and the near-field probe 6 on the motion mechanism 5 scans at a low speed along the horizontal direction; after completing the data collection at each position in the vertical direction (m sampling points), the near-field probe 6 moves back quickly (no data collection is performed during this process) to enable data collection at the next position in the vertical direction.

[0085] In this embodiment, the number m of sampling points in the horizontal direction and the number n of sampling points in the vertical direction are determined by the number of array elements in the antenna array plane, and each sampling point corresponds to one array element.

[0086] After the near-field probe 6 reaches each sampling point, the first controller 3 sends a pulse signal to the active phased array radar 4 (i.e., the first pulse signal when transmitting a multi-beam test, and the second pulse signal when receiving a multi-beam test). After the active phased array radar 4 receives each pulse signal, it indicates that the near-field probe 6 has reached the corresponding sampling point, and the active phased array radar 4 begins to radiate multiple electromagnetic beams outward through the antenna array, and the near-field probe 6 collects multi-transmit beam data; or the active phased array radar 4 begins to send multiple electromagnetic wave signals to the near-field probe 6 through its intermediate frequency transmission module, and the near-field probe 6 radiates multiple electromagnetic beams outward, and the active phased array radar 4 collects multi-receive beam data. The pulse signal, beam switching, and data acquisition timing are as follows. Figure 3 As shown, the active phased array radar 4 receives the synchronous trigger pulse signal of the current sampling point, triggers the beam switching and the collection of the transmit beam data / receive beam data with the rising edge of the pulse signal, and completes the switching of all beams of the active phased array radar 4 and the collection of the transmit beam data / receive beam data before the next pulse signal arrives. In this embodiment, the transmit beam data or the receive beam data is amplitude phase data.

[0087] In a specific embodiment of the present invention, the analysis of the transmission beam data or the reception beam data by the second controller 1 includes beam pattern analysis, beam pointing analysis, beam scanning range analysis, side lobe level analysis, polarization isolation and polarization consistency analysis. The active phased array radar 4 integrates the transmission beam data or the reception beam data in a certain format and sends it to the second controller 1. With the plane scanning of the near-field probe 6 on the motion mechanism 5, the amplitude and phase data of multiple beams of the entire antenna array are collected. The second controller 1 stores the collected data in a text file according to the beam, and then performs near-field and far-field data conversion and draws and analyzes the pattern, beam pointing, beam scanning range, side lobe level, polarization isolation and polarization consistency of each beam of the active phased array radar 4.

[0088] Figure 4 The figure shows the internal RF loopback link of the active phased array radar 4 during the multi-beam transmission test. Based on the frequency provided by the frequency synthesis module, the intermediate frequency transmission module generates a signal and outputs it to the power divider after mixing inside the intermediate frequency transmission module. The power divider distributes the received signal to each TR component. After passing through the TR component and the polarization switch SPDT, the signal is radiated outward through the antenna array. The near-field probe 6 collects the transmission beam data radiated outward by the antenna array, and feeds the transmission beam data back to the intermediate frequency transmission module. The transmission beam data is mixed inside the intermediate frequency transmission module and output from the intermediate frequency calibration port to the AD module, and then output to the signal processing module after AD conversion. The signal processing module integrates the data and sends it to the second controller 1.

[0089] Figure 5The figure shows the internal RF loopback link of the active phased array radar 4 during the receiving multi-beam test. Based on the frequency provided by the frequency synthesis module, the intermediate frequency transmission module generates a signal and outputs it to the near-field probe 6 after mixing inside the module. The near-field probe 6 radiates the signal to the outside and collects it by the antenna array. The collected signal (i.e., the received beam data) is transmitted to the TR component via the polarization switch (SPDT). The TR component mixes the signal transmitted by the polarization switch with the signal transmitted by the power divider and outputs it to the AD module. After AD conversion, the signal is transmitted to the signal processing module. The signal processing module integrates the data and sends it to the second controller 1.

[0090] In a specific embodiment of the present invention, the second controller 1 is connected to the active phased array radar 4 and the first controller 3 through the network switch 2, and data is transmitted using the TCP / IP protocol. The data interaction between the second controller 1 and the active phased array radar 4 is agreed to be:

[0091] Uplink data: data sent by the second controller 1 to the active phased array radar 4;

[0092] Downlink data: data sent by the active phased array radar 4 to the second controller 1.

[0093] The data frame format is shown in Table 1.

[0094] Table 1 Data frame format

[0095] Item1 Item 2 Data

[0096] Item1: number of sampling points, 4 bytes, minimum value is 1, data storage (or copying) is performed in little-endian type (that is, the low byte of the data is stored in the low address of the memory); if it is programmed in C language, directly use the memcpy() function to copy the memory; after the radar host completes Item1 multi-beam acquisition, it will feedback data. If Item1=0, it means the test is over or terminated.

[0097] Item2: Wave number, 4 bytes, minimum value is 1, data storage is the same as Item1.

[0098] Data: Data item, used to transmit data. For uplink data, Data is Item2 wave position codes, each wave position code is 4 bytes; for downlink data, Data is Item1 group {Item2 amplitude, Item2 phase} data arranged in sequence, each amplitude and phase data is 4 bytes.

[0099] After the radar completes the acquisition of multiple sampling points in one column, it returns the amplitude and phase data of the multi-beam. For example, if there are two sampling points and two positions in one column, Item1=2, Item2=2, Data=position 1 position 1 amplitude, position 1 position 2 amplitude, position 1 position 1 phase, position 1 position 2 phase, position 2 position 1 amplitude, position 2 position 2 amplitude, position 2 position 1 phase, position 2 position 2 phase.

[0100] Example 2

[0101] like Figure 1 As shown, an active phased array radar multi-transceiver beam test system provided by an embodiment of the present invention includes a first controller 3, a second controller 1, a motion mechanism 5 and a near-field probe 6; the second controller 1 is connected to the active phased array radar 4 and the first controller 3, the first controller 3 is connected to the active phased array radar 4 and the motion mechanism 5, the near-field probe 6 is arranged on the motion mechanism 5 and is connected to the intermediate frequency transmission module of the active phased array radar 4; the active phased array radar 4 and the motion mechanism 5 are located in a microwave darkroom.

[0102] The second controller 1 is used to send a control instruction to the first controller 3, so that the first controller 3 controls the motion mechanism 5 to move under the control instruction; and analyze the received transmission beam data and reception beam data.

[0103] The first controller 3 is used to control the motion mechanism 5 to work under the control instruction of the second controller 1, and then control the movement of the near-field probe 6 to align the near-field probe 6 with different sampling points of the antenna array surface of the active phased array radar 4; after the near-field probe 6 is aligned with different sampling points of the antenna array surface of the active phased array radar 4, a first pulse signal or a second pulse signal is sent to the active phased array radar 4.

[0104] The active phased array radar 4 is used to radiate multiple electromagnetic beams outward through the antenna array after receiving the first pulse signal; process the multiple transmission beam data fed back by the near-field probe 6 and send them to the second controller 1; after receiving the second pulse signal, send multiple electromagnetic wave signals to the near-field probe 6 through the intermediate frequency transmission module; collect multiple receiving beam data when the near-field probe 6 radiates multiple electromagnetic beams outward, and process the multiple receiving beam data and send them to the second controller 1.

[0105] The near-field probe 6 is used to collect multiple transmission beam data when the antenna array radiates multiple electromagnetic beams outward, and feed back the multiple transmission beam data to the active phased array radar 4; and radiate multiple electromagnetic beams outward according to the multiple electromagnetic wave signals sent by the intermediate frequency transmission module.

[0106] In a specific implementation of the present invention, the second controller 1 is connected to the active phased array radar 4 and the first controller 3 via a network switch 2 .

[0107] In a specific embodiment of the present invention, the motion mechanism 5 is a two-dimensional motion mechanism 5, and includes a base, a horizontal drive mechanism and a vertical drive mechanism, wherein the horizontal drive mechanism is fixedly arranged on the base, the vertical drive mechanism is movably arranged on the horizontal drive mechanism, and the near-field probe 6 is arranged on the vertical drive mechanism. The near-field probe 6 is driven to move in the horizontal direction by the horizontal drive mechanism, and the near-field probe 6 is driven to move in the vertical direction by the vertical drive mechanism.

[0108] In some embodiments, the active phased array radar multi-transmitting and receiving beam testing system can be combined with any one of the active phased array radar multi-transmitting and receiving beam testing method features in Example 1 of the present application; and vice versa, which will not be repeated here.

[0109] What is disclosed above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A method for testing multiple transceiver beams of an active phased array radar, characterized in that: The intermediate frequency transmitting module of the active phased array radar is connected to a near-field probe, the near-field probe is arranged on a motion mechanism, the motion mechanism is controlled by a first controller, the first controller is connected to the active phased array radar and a second controller, and the second controller is connected to a signal processing module of the active phased array radar; the active phased array radar and the motion mechanism are located in a microwave darkroom; the test method includes a transmitting multi-beam test and a receiving multi-beam test; The transmit multi-beam test includes: Step A1: the first controller controls the motion mechanism under the control of the second controller, thereby controlling the motion of the near-field probe to align the near-field probe with a sampling point of the antenna array of the active phased array radar; Step A2: the first controller sends a first pulse signal to the active phased array radar; Step A3: After receiving the first pulse signal, the active phased array radar radiates multiple electromagnetic beams outward through the antenna array; at the same time, the near-field probe collects multiple transmission beam data and feeds the multiple transmission beam data back to the active phased array radar; Step A4: the active phased array radar processes the received multiple transmission beam data and sends them to the second controller; Step A5: repeating steps A1 to A4 until the acquisition of multiple transmit beam data of all sampling points on the antenna array is completed; Step A6: the second controller analyzes the received transmit beam data; The receive multi-beam test includes: Step B1: the first controller controls the motion mechanism under the control of the second controller, thereby controlling the motion of the near-field probe to align the near-field probe with a sampling point of the antenna array of the active phased array radar; Step B2: the first controller sends a second pulse signal to the active phased array radar; Step B3: After receiving the second pulse signal, the active phased array radar sends a plurality of electromagnetic wave signals to the near-field probe through the intermediate frequency transmitting module, and the near-field probe radiates a plurality of electromagnetic wave beams externally; at the same time, the active phased array radar collects a plurality of receiving beam data; Step B4: the active phased array radar processes the multiple receiving beam data and sends them to the second controller; Step B5: repeating steps B1 to B4 until the acquisition of multiple receiving beam data of all sampling points on the antenna array is completed; Step B6: the second controller analyzes the received receive beam data; Wherein, the first pulse signal and the second pulse signal are both positive pulse signals; the active phased array radar automatically switches the beam according to the rising edge of the first pulse signal, and radiates multiple electromagnetic beams outward through the antenna array; The active phased array radar automatically switches beams according to the rising edge of the second pulse signal, sends multiple electromagnetic wave signals to the near-field probe through the intermediate frequency transmission module, and the near-field probe radiates multiple electromagnetic beams externally.

2. The active phased array radar multi-transmitting and receiving beam testing method according to claim 1, characterized in that: The specific process of the first controller controlling the movement of the near-field probe includes: Step 1.11: First, control the near-field probe to step to the first position in the horizontal direction, and then control the near-field probe to step to the first position in the vertical direction, so that the near-field probe is aligned with the first sampling point of the antenna array of the active phased array radar; Step 1.12: After completing the acquisition of multiple transmission beam data or reception beam data of the first sampling point of the antenna array, control the near-field probe to step to the second position in the vertical direction, so that the near-field probe is aligned with the second sampling point of the antenna array of the active phased array radar; Step 1.13: Repeat step 1.12 until the acquisition of multiple transmit beam data or receive beam data of all sampling points in the vertical direction corresponding to the first position in the horizontal direction is completed; Step 1.14: Control the near-field probe to move to a second position in the horizontal direction, and repeat steps 1.11 to 1.13 until the acquisition of multiple transmit beam data or receive beam data of all sampling points in the vertical direction corresponding to the second position in the horizontal direction is completed; Step 1.15: Control the near-field probe to move to the next position in the horizontal direction, and repeat step 1.14 until the collection of multiple transmit beam data or receive beam data of all sampling points in the vertical direction corresponding to all positions in the horizontal direction is completed.

3. The active phased array radar multi-transmitting and receiving beam testing method according to claim 1, characterized in that: The specific process of the first controller controlling the movement of the near-field probe includes: Step 1.21: First, control the near-field probe to step to the first position in the vertical direction, and then control the near-field probe to step to the first position in the horizontal direction, so that the near-field probe is aligned with the first sampling point of the antenna array of the active phased array radar; Step 1.22: After completing the acquisition of multiple transmission beam data or reception beam data of the first sampling point of the antenna array, control the near-field probe to step to the second position in the horizontal direction, so that the near-field probe is aligned with the second sampling point of the antenna array of the active phased array radar; Step 1.23: Repeat step 1.22 until the acquisition of multiple transmit beam data or receive beam data of all sampling points in the horizontal direction corresponding to the first position in the vertical direction is completed; Step 1.24: Control the near-field probe to move to a second position in the vertical direction, repeat steps 1.21 to 1.23, and complete the collection of multiple transmit beam data or receive beam data of all sampling points in the horizontal direction corresponding to the second position in the vertical direction; Step 1.25: Control the near-field probe to move to the next position in the vertical direction, and repeat step 1.24 until the collection of multiple transmit beam data or receive beam data of all sampling points in the horizontal direction corresponding to all positions in the vertical direction is completed.

4. The active phased array radar multi-transmitting and receiving beam testing method according to any one of claims 1 to 3, characterized in that: The analysis of the transmission beam data or the reception beam data by the second controller includes beam pattern analysis, beam pointing analysis, beam scanning range analysis, side lobe level analysis, polarization isolation and polarization consistency analysis.

5. An active phased array radar multi-transmitting and receiving beam testing system, characterized in that: The system includes a first controller, a second controller, a motion mechanism and a near-field probe; the second controller is connected to the active phased array radar and the first controller, the first controller is connected to the active phased array radar and the motion mechanism, the near-field probe is arranged on the motion mechanism and connected to the intermediate frequency transmission module of the active phased array radar; the active phased array radar and the motion mechanism are located in a microwave darkroom; The second controller is used to send a control instruction to the first controller so that the first controller controls the motion mechanism to move under the control instruction; and analyze the received transmission beam data and reception beam data; The first controller is used to control the motion mechanism to work under the control instruction of the second controller, and then control the movement of the near-field probe to align the near-field probe with different sampling points of the antenna array surface of the active phased array radar; after the near-field probe is aligned with different sampling points of the antenna array surface of the active phased array radar, send the first pulse signal or the second pulse signal to the active phased array radar; The active phased array radar is used to radiate multiple electromagnetic beams outward through the antenna array after receiving the first pulse signal; process the multiple transmission beam data fed back by the near-field probe and send them to the second controller; after receiving the second pulse signal, send multiple electromagnetic wave signals to the near-field probe through the intermediate frequency transmission module; collect multiple receiving beam data when the near-field probe radiates multiple electromagnetic beams outward, and process the multiple receiving beam data and send them to the second controller; wherein the first pulse signal and the second pulse signal are both positive pulse signals; the active phased array radar automatically switches the beam according to the rising edge of the first pulse signal, and radiates multiple electromagnetic beams outward through the antenna array; the active phased array radar automatically switches the beam according to the rising edge of the second pulse signal, and sends multiple electromagnetic wave signals to the near-field probe through the intermediate frequency transmission module; The near-field probe is used to collect multiple transmission beam data when the antenna array radiates multiple electromagnetic beams outward, and feed back the multiple transmission beam data to the active phased array radar; and radiate multiple electromagnetic beams outward according to the multiple electromagnetic wave signals sent by the intermediate frequency transmission module.

6. The active phased array radar multi-transmitting and receiving beam testing system according to claim 5, characterized in that: The second controller is connected to the active phased array radar and the first controller through a network switch.

7. The active phased array radar multi-transmitting and receiving beam testing system according to claim 5 or 6, characterized in that: The motion mechanism comprises a base, a horizontal driving mechanism and a vertical driving mechanism. The horizontal driving mechanism is fixedly arranged on the base, the vertical driving mechanism is movably arranged on the horizontal driving mechanism, and the near-field probe is arranged on the vertical driving mechanism.

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