Rapid subarray test method and system for production line

Abstract

The invention relates to the field of debugging and testing in a phased-array antenna sub-array production process, and provides a rapid sub-array testing method and system for a production line, and the method comprises the steps: distributing a unique identification number for a plurality of to-be-tested sub-array antennas on the production line, and carrying out the transmission mode testing of the sub-array antennas, and verifying whether the transmission channels of the sub-array antennas are normal or not; the frequency conversion mode test verifies the channel performance of each sub-array antenna; the digital receiving test detects the digital channel performance of the sub-array antenna and the digital beam forming performance; calculating to obtain a far-field azimuth pattern and a pitching direction of the antenna sub-array at a specified position in transmitting, receiving and digital receiving states through a near-far field transformation algorithm and a probe correction algorithm, and evaluating whether the performance of the antenna sub-array meets design requirements or not; completing the analysis of the preset indexes of the whole array, and preliminarily judging the performance of the whole array. The performance and existing problems of each level are screened and diagnosed, software and hardware problems are eliminated, the subsequent large-scale whole array test efficiency is improved, and the test efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of debugging and testing in the production process of phased array antenna subarrays, and particularly to a fast subarray testing method and system for production lines. Background Art

[0002] As a key component in modern radar, communication, and satellite systems, the performance of a phased array antenna directly affects the overall effectiveness of the system. A phased array antenna usually consists of multiple subarrays, each of which is responsible for transmitting or receiving signals. Due to the complexity and precision of phased array antennas, the production, assembly, and testing of subarrays are crucial.

[0003] Currently, conventional phased array radar antennas are generally tested and debugged in a microwave anechoic chamber after the entire array is assembled. The following problems may occur during the debugging process: After the entire array antenna is assembled, the method of entering the microwave anechoic chamber to conduct a comprehensive performance test can test the working performance of the entire array under a controlled environment. However, its disadvantage is that the test process is long, and it is impossible to locate specific subarray performance problems in real time. Each subarray is individually debugged during the assembly process and then integrated with other subarrays as a whole after completion. This method often requires multiple disassembly and assembly operations, wasting a large amount of time and easily affecting the repeatability and stability of the subarray. Finally, traditional debugging often requires manual intervention, increasing the possibility of human error. Especially during the entire array process, the interaction between subarrays makes it difficult to locate specific problems of a certain subarray.

[0004] Therefore, due to various problems encountered in the conventional debugging and testing process, the subarray may be continuously disassembled and assembled, making it difficult to locate problems and resulting in low test efficiency. Therefore, a fast subarray testing system for production lines is proposed to detect the software and hardware performance and radio frequency performance of subarrays during the production, assembly, and environmental test processes, move forward the risks encountered during the entire array debugging and testing process, and reduce the troubleshooting time for the entire array debugging and testing. The subarray testing system needs to meet multi-channel transmission, receive frequency conversion, and subarray digital performance testing, with complete software functions, covering complex antenna arrays and test requirements of different models, achieving universal radar subarray testing and analysis, which is of great significance for antenna productization, batch production qualification verification, and consistency verification. Summary of the Invention

[0005] In view of the above problems, the present invention proposes a fast subarray testing method and system for production lines, which solves the problems in the prior art that testing can only be carried out after the entire array is assembled, resulting in difficult problem location, low test efficiency, and long troubleshooting time. At the same time, as an important part of the production line, this system has the function of high-efficiency multi-mode universal antenna automatic testing, with high screening efficiency and diagnosis efficiency, saving huge time costs for subsequent entire array testing, and greatly improving the testing efficiency and accuracy of the antenna entire array. The above objects of the present invention are achieved through the following technical solutions: The present invention provides a fast sub - array testing method for a production line. The steps include: Step S1: Assign unique identification numbers to several sub - array antennas to be tested on the production line, and burn corresponding software versions according to the technical specifications of each sub - array antenna. The identification number i is a natural number greater than 0. Step S2: Install the sub - array to be tested on a sub - array blind - plugging tooling, and install the sub - array blind - plugging tooling on a sub - array installation platform. Adjust the parallelism between the sub - array antenna and the probe in the RF subsystem through the telescopic slide and swing adjustment table of the sub - array installation platform subsystem, and use the laser rangefinder in the sub - array installation platform subsystem to measure the distance between the top of the probe and the sub - array antenna. The probe is used to detect the failed units or singular change regions on the aperture surface of the sub - array antenna. Step S3: Conduct a transmission - mode test on the sub - array antenna through the RF subsystem to verify whether each transmission channel of the sub - array antenna is normal and whether the burned software version can normally control the switches and phase shifters corresponding to the intermediate channels of the sub - array antenna. Step S4: Conduct a reception frequency - conversion mode test on the sub - array antenna to verify the channel performance of each sub - array antenna and whether the software version can control the corresponding channel switches and phase - shift attenuation. Step S5: Conduct a digital reception test on the sub - array antenna to detect the digital channel performance and the performance of digital beamforming of the sub - array antenna. Step S6: Calculate the far - field azimuth pattern F i_AZ and elevation pattern F i_EL of the antenna sub - array at a specified position in the transmission, reception, and digital reception states through the near - far - field transformation algorithm and the probe correction algorithm, and judge the data according to the preset standard to evaluate whether the performance of the antenna sub - array meets the design requirements. Step S7: Based on the far - field azimuth pattern F i_AZ and elevation pattern F i_EL of the sub - array antenna in the transmission, reception, and digital reception states after testing, conduct comparison and analysis of the consistency data of each sub - array antenna. Step S8: According to the recorded far - field azimuth pattern Fi_AZ and elevation pattern Fi_EL data, perform vector synthesis according to the relative position relationship of the sub - array antennas to calculate the azimuth and elevation patterns of the entire array, thereby completing the analysis of the preset indicators of the entire array and preliminarily judging the performance of the entire array.

[0006] Furthermore, step S3 includes: Step S31: Connect port 1 of the frequency - conversion vector network in the RF subsystem as the source output port to the transmission port of the sub - array antenna, connect port 2 of the frequency - conversion vector network to the probe, and adjust the output power of the vector network to make the sub - array antenna work in a saturated state. Step S32: Power on the sub-array antenna in the transmitting state, start the automated test software in the control subsystem, and set the output power and test frequency of the vector network analyzer with one key. When the sub-array antenna is in the pulse operating mode, synchronize the timing of the frequency-converting vector network analyzer and the sub-array antenna, and set the pulse width and pulse synchronization mode of the frequency-converting vector network analyzer. Among them, Channel 1 of Port 1 is the S21 amplitude, and Channel 2 of Port 2 is the S21 phase. Set the basic parameters of the robotic arm according to the preset standard, and the basic parameters include the scanning trajectory, scanning step size, and speed parameters. Step S33: Run the automated test software, control the transmitting channels of the sub-array antenna to be opened in sequence, and move the probe through the robotic arm to traverse the positions corresponding to the transmitting channels in sequence. Use the frequency-converting vector network analyzer to test and store the amplitude values of the frequency points to be measured of the transmitting channels in sequence. and phase values , and set the index lines based on the set amplitude values and phase values to determine whether each transmitting channel in the sub-array antenna is normal. Step S34: Run the transmitting trim algorithm, calculate the phase trim codes of each transmitting channel, and burn the phase trim codes through the online program. Step S35: Run the automated test software again, set the basic parameters of the robotic arm, control all the transmitting channels of the sub-array antenna to be opened in the full array in the multi-frequency and multi-waveform mode, and set the wave positions to be measured at the points to be measured. The probe collects the amplitude values at the specified positions above the sub-array antenna according to the preset scanning trajectory. and phase values , obtain the near-field amplitude-phase data, draw the near-field amplitude-phase diagram, and then obtain the far-field pattern of the sub-array transmission according to Step 6.

[0007] Further, Step S4 includes: Step S41: Connect Port 1 of the frequency-converting vector network analyzer as the signal source output port to the probe, connect Port 3 to the first local oscillator input port of the sub-array antenna, connect the signal source output port to the second local oscillator input port of the sub-array antenna, connect Port 2 of the frequency-converting vector network analyzer to the intermediate frequency test port of the sub-array antenna, and connect Port 4 of the frequency-converting vector network analyzer to the intermediate frequency reference port. Adjust the output powers of the frequency-converting vector network analyzer and the signal source to meet the requirements of the radio frequency and local oscillator signals required for the sub-array test. Step S42: Start the automated test software, fully charge the sub-array antenna in the receiving state, set the output power, test frequency, and mixing test mode of the frequency-converting vector network analyzer and the signal source with one key. Channel 1 is the VC24 amplitude, and Channel 2 is the VC24 phase. Set the basic parameters of the robotic arm. Step S43: Run the automated test software, control the receiving channels of the sub-array antenna to be opened in sequence, move the probe by the robotic arm to the corresponding receiving channel positions, and collect the amplitude values of the frequency-converting vector network analyzer. and phase values ; Step S44: Run the receiving amplitude and phase equalization algorithm to obtain the amplitude equalization codes and phase equalization codes for each element within the subarray antenna, and burn them into the subarray wave control via an online program. Step S45: Run the automated test software again, set the frequency-variable vector network to the frequency-variable test state, and simultaneously set the signal source power, frequency, and the basic parameters of the robotic arm; control all receiving channels of the subarray antenna to be fully opened and set the wave positions to be measured at the measurement points. The probe collects the amplitude values at the specified positions above the subarray antenna according to the preset scanning trajectory and phase values , obtain the near-field amplitude-phase data, draw the near-field amplitude-phase diagram, and then obtain the subarray receiving far-field pattern according to Step S6.

[0008] Furthermore, Step S5 includes: Step S51: Connect Port 1 of the frequency-variable vector network as the signal source output port to the probe, connect Port 3 to the first local oscillator input port of the subarray antenna, and connect the signal source output port to the second local oscillator input port of the subarray antenna. Adjust the output powers of the frequency-variable vector network and the signal source. The subarray antenna switches to the digital mode to ensure that the receiving channels and reference channels of the subarray antenna are in the linear working region and have excellent signal-to-noise ratio. Step S52: Start the automated test software, power on the subarray antenna in the receiving state, and one-key set the output powers, test frequencies, and mixing test modes of the frequency-variable vector network and the signal source, and set the basic parameters of the robotic arm. Step S53: Connect to the fiber output port of the subarray antenna through the digital subarray measurement subsystem. Control the digital channels received by the subarray antenna to be opened sequentially, perform signal processing on the digital board and manual intervention control on the subarray digital board to perform IQ data acquisition and feedback display for each channel. Then, compare the IQ data of each channel and the IQ data of the reference channel through the data analysis algorithm and resolve them into the corresponding amplitude values and phase values , and transmit the data back to the automated test software for plotting and index comparison to quickly verify the digital receiving performance of the subarray antenna. Step S53: Run the receiving amplitude and phase equalization algorithm to obtain the amplitude equalization codes and phase equalization codes for each digital channel within the subarray antenna, obtain the digital attenuation codes and phase matching codes through the solution algorithm, and burn them into the digital beamformer via an online program. Step S54: Run the automated test software again, set the basic parameters of the robotic arm; control all receiving channels of the subarray antenna to be fully opened and set the wave positions to be measured at the measurement points in the digital beamformer. The probe moves above the subarray antenna according to the preset scanning trajectory and performs IQ data acquisition, storage, and analysis on the measured channels and the reference channels through the digital subarray measurement subsystem to obtain the amplitude values and phase values , near-field amplitude-phase data is obtained, and the digital far-field pattern of the subarray is obtained according to step S6.

[0009] Further, step S7 includes: The level deviation of the i-th subarray antenna at the frequency point to be measured is ; where is the deviation between the measured level value and the required value in the normal direction of each subarray antenna, is the measured level value in the normal direction of each subarray, is the required level value in the normal direction of each subarray antenna; The phase deviation of the i-th subarray antenna at the frequency point to be measured is , is the deviation between the measured phase value and the required value in the normal direction of each subarray, is the measured phase value in the normal direction of each subarray antenna, is the required value of the index in the normal direction of each subarray antenna.

[0010] Further, step S8 includes: Based on the formula ; Merge the performance of the entire array; where, and are the azimuth and elevation patterns of the phased array antenna respectively, F i_AZ and F i_EL are the far-field azimuth pattern and elevation pattern data of the i-th subarray respectively; A i_AZ represents the azimuth amplitude pattern of a certain frequency point of the i-th subarray, is the azimuth phase pattern of the i-th subarray, Ai_EL represents the elevation amplitude pattern of a certain frequency point of the i-th subarray, is the elevation phase pattern of the i-th subarray.

[0011] Based on the same inventive concept, the present invention also provides a fast subarray test system for a production line, which adopts the above fast subarray test method, including a dark box, a robotic arm, a radio frequency subsystem, a digital subarray measurement subsystem, a subarray blind plugging tooling, a subarray installation platform subsystem and a control subsystem, and realizes the test of various states of the subarray antenna on the production line by designing the test connection block diagram of the subarray antenna and configuring the working state of the subarray antenna; The dark box, made of metal plates and absorbing materials, is used to shield the environment; and pulleys and locking devices are installed at the bottom of the dark box for movement, and lighting and monitoring equipment are installed inside for monitoring the test state of the subarray antenna; The robotic arm includes a six-degree-of-freedom robotic arm and its control driver, which are used to realize the X-direction, Y-direction, and Z-direction movement of the probe and the rotation of the polarization axis; The RF subsystem includes a frequency conversion vector network analyzer, a signal source, a probe, a horn, and RF cables, which form an RF signal link with the subarray antenna under test to realize the transmission and frequency conversion reception tests of the subarray antenna; The digital subarray measurement subsystem is used for subarray digital signal acquisition and digital signal processing, and realizes the summary, analysis, and feedback information of subarray digital signals by sending test commands and monitoring test status; The subarray blind plugging tooling is used to quickly replace the subarray on the production line and efficiently complete the test status switching; The subarray installation platform subsystem includes a telescopic sliding table, a swing adjustment table, and a laser rangefinder, which are used to install the subarray antenna under test and perform position adjustment and distance adjustment; The control subsystem is used to control the RF subsystem, the general digital measurement subsystem, and the robotic arm; among them, the data processing module in the control subsystem is used to sequentially collect the amplitude and phase information of the transmission state, receiver state, and digital state of a single channel of the subarray antenna, and realize the amplitude and phase balancing within the subarray in various states through a balancing algorithm, and then perform the amplitude and phase acquisition of the balanced subarray. The radiation pattern of the subarray antenna in various states is obtained through near-field to far-field transformation and probe compensation algorithms; the data of each subarray antenna is synthesized to obtain the radiation pattern of the entire array, and the performance of the entire array can be initially judged.

[0012] Furthermore, the robotic arm is used to perform rapid fixed-point acquisition along the subarray plane according to the stroke and angle set by the host computer of the control subsystem; the subarray installation platform subsystem is used to adjust the positional relationship, parallelism, and distance between the probe and the subarray antenna under test.

[0013] Furthermore, in the RF subsystem, when the subarray antenna is in the transmission state, the frequency conversion vector network analyzer provides an excitation signal, and the subarray antenna amplifies and distributes the input excitation signal according to the control command, and then sends it to the TR module for amplification and output after passing through the comprehensive backplane; when the antenna subarray is in the reception state, the signal received by the subarray antenna enters the TR module for amplification, and after being synthesized through the comprehensive backplane, it enters the receiver in the subarray antenna and is down-converted to an intermediate-frequency signal; when the intermediate-frequency signal enters the digital reception channel for processing and is output through an optical fiber, the digital subarray measurement subsystem can collect the IQ signals output by the optical fiber for digital reception tests.

[0014] Furthermore, the digital subarray measurement subsystem is used to forward the control commands from the host computer to the subarray antenna, and summarize the downlink data and feedback information during the test. The downlink data is sent to the host computer for data analysis after being cached, and the feedback information is displayed in real time.

[0015] Compared with the prior art, the present invention has at least one of the following beneficial effects: In this application, by performing transmission, reception frequency conversion, and digital reception tests on the sub-arrays on the production line, the performance and existing problems at each level are screened and diagnosed, effectively eliminating software and hardware problems, which can greatly improve the efficiency of subsequent large-scale array tests. The test efficiency is high, the data processing flexibility is high, and data can be quickly extracted for sub-array consistency analysis. By synthesizing the array pattern from the sub-array patterns, the performance of the array pattern can be initially obtained, and the performance of the entire array can be effectively predicted. Description of the Drawings

[0016] Figure 1 is a flowchart of the steps of the fast sub-array test method for the production line of the present invention; Figure 2 is a schematic diagram of the composition of the sub-array of the phased array antenna in the embodiment of the present invention; Figure 3 is a block diagram of the fast sub-array test system in the embodiment of the present invention; Figure 4 is a schematic diagram of the structure of the sub-array blind plugging tooling in the embodiment of the present invention; Figure 5 is a block diagram of the structure of the digital sub-array measurement subsystem in the embodiment of the present invention; Figure 6 are the sub-array pattern and the array pattern in the embodiment of the present invention, where Figure 6 (a) is the azimuth and elevation patterns of the i-th sub-array, Figure 6 (b) is the array pattern synthesized from m sub-arrays. Detailed Embodiments

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application. However, the present invention can achieve automated processing of various states of the sub-array with different operating systems, processing methods, etc., and should not be construed as being limited by the embodiments presented herein. On the contrary, these embodiments are presented to achieve full and complete disclosure and to enable more people in the relevant technical field to fully understand the scope of the present invention. In these drawings, for clear visibility, the relative dimensions may be scaled or only the actual devices of the system are schematically represented.

[0018] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the", and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the description of the present invention means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or their groups.

[0019] The first embodiment The present invention provides a fast subarray testing method for a production line, which is used for detecting the performance of subarray antennas during the production and assembly process and preliminarily determining the performance of the entire array. This method uses a frequency conversion subsystem and a general digital measurement subsystem to complete the near-field testing of each channel of the subarray in a dark box, and then performs amplitude and phase leveling on each channel of the subarray. Through the near-field to far-field conversion algorithm and the probe correction algorithm, the calculation and analysis of the transmitting pattern, receiving pattern, and digital DBF pattern of the subarray are realized, and the consistency of multiple subarray data is determined and data synthesis is performed to realize the preliminary analysis of the antenna pattern of the entire array surface. This method can effectively detect software and hardware problems existing in each link of subarray production and assembly, discover problems before the entire array is assembled, and obtain the antenna pattern data of the entire array by synthesizing the data of each subarray, which can effectively reduce the troubleshooting time of the entire array and quickly evaluate the performance of the entire array antenna at the same time. This method has high testing efficiency, high diagnosis rate, and good compatibility and versatility, and is applicable to various types of subarray antennas on the production line, such as Figure 1 As shown, the steps include: Step S1: Assign a unique identification number to several subarray antennas to be tested on the production line, and burn the corresponding software version according to the technical specifications of each subarray antenna. The identification number i is a natural number greater than 0, such as i = 1, 2, 3, 4,..., N; Step S2: Install the subarray to be tested on the subarray blind plugging tooling, and install the subarray blind plugging tooling on the subarray installation platform. Adjust the parallelism between the subarray antenna and the probe in the RF subsystem through the telescopic slide and swing adjustment table of the subarray installation platform subsystem, and test the distance between the top of the probe and the subarray antenna through the laser rangefinder in the subarray installation platform subsystem, where the probe is used to detect the failed units or singular change regions on the aperture surface of the subarray antenna; Step S3: Perform a transmission mode test on the subarray antenna through the RF subsystem to verify whether each channel of the subarray antenna transmits normally and whether the burned software version can normally control the switches and phase shifters corresponding to the middle channels of the subarray antenna; Step S4: Perform a subarray antenna receiving frequency conversion mode test to verify the channel performance of each subarray antenna and whether the software version can control the corresponding channel switches and phase shift attenuations; Step S5: The subarray antenna conducts digital reception tests to detect the performance of the digital channels of the subarray antenna and the performance of digital beamforming; Step S6: Calculate the far-field azimuth pattern F i_AZ and elevation pattern F i_EL of the antenna subarray at a specified position in the transmitting, receiving, and digital receiving states through the near-field to far-field transformation algorithm and the probe correction algorithm, and evaluate whether the performance of the antenna subarray meets the design requirements according to the preset standard for interpreting data; Step S7: Based on the far-field azimuth pattern F i_AZ and elevation pattern F i_EL of the subarray antenna in the transmitting, receiving, and digital receiving states, conduct comparison and analysis of the consistency data of each subarray antenna after testing; Step S8: According to the recorded far-field azimuth pattern F i_AZ and elevation pattern F i_EL data, perform vector synthesis according to the relative position relationship of the subarray antennas, calculate the azimuth and elevation patterns of the entire array, and thus complete the analysis of the preset indicators of the entire array and preliminarily determine the performance of the entire array.

[0020] Furthermore, Step S3 includes: Step S31: According to the block diagram of the fast subarray test system, connect port 1 of the frequency conversion vector network in the RF subsystem as the source output port to the transmitting port of the subarray antenna, connect port 2 of the frequency conversion vector network to the probe, and adjust the output power of the vector network so that the subarray antenna operates in a saturated state; Step S32: Power on the subarray antenna in the transmitting state, start the automated test software in the control subsystem, and set the output power and test frequency of the vector network with one key. When the subarray antenna is in the pulse working mode, synchronize the timing of the frequency conversion vector network and the subarray antenna, and set the pulse width and pulse synchronization method of the frequency conversion vector network; among them, channel 1 of port 1 is the S21 amplitude, channel 2 of port 2 is the S21 phase, and set the basic parameters of the robotic arm according to the preset standard, and the basic parameters include parameters such as the scanning trajectory, scanning step size, and speed parameters; Step S33: Run the automated test software, control the transmitting channels of the subarray antenna to be opened in sequence, and move the probe through the robotic arm to sequentially traverse the positions corresponding to the transmitting channels, and use the frequency conversion vector network to sequentially test and store the amplitude values and phase values of the frequency points to be measured in the transmitting channels, and set the index lines based on the set amplitude values and phase values to determine whether each transmitting channel in the subarray antenna is normal. If there is a problem with the channel, repair it in time; Step S34: Run the transmission trimming algorithm, calculate the phase trimming codes of each transmitting channel, and burn the phase trimming codes through the online program; Step S35: Run the automated test software again, set the basic parameters of the robotic arm, control the full array opening of the transmitting channels of the sub-array antenna in a multi-frequency and multi-waveform manner, set the wave position to be measured at the point to be measured, and the probe collects the amplitude value at the specified position above the sub-array antenna according to the preset scanning trajectory. and the phase value , and the specified position is the near-field amplitude-phase data obtained at the position of the i-th row and j-th column of the probe, draw the near-field amplitude-phase diagram, and then the far-field radiation pattern of the sub-array transmission can be obtained according to Step 6.

[0021] Further, Step S4 includes: Step S41: Connect Port 1 of the frequency-converting vector network analyzer as the signal source output port to the probe, connect Port 3 to the first local oscillator input port of the sub-array antenna, connect the signal source output port to the second local oscillator input port of the sub-array antenna, connect Port 2 of the frequency-converting vector network analyzer to the intermediate-frequency test port of the sub-array antenna, and connect Port 4 of the frequency-converting vector network analyzer to the intermediate-frequency reference port, and adjust the output power of the frequency-converting vector network analyzer and the signal source to meet the requirements of the RF and local oscillator signals for sub-array testing. Step S42: Start the automated test software, fill up the receiving state of the sub-array antenna, and set the output power, test frequency, and mixing test mode of the frequency-converting vector network analyzer and the signal source with one key. Channel 1 is the VC24 amplitude, Channel 2 is the VC24 phase, and set the basic parameters of the robotic arm. Step S43: Run the automated test software, control the receiving channels of the sub-array antenna to be opened in sequence, the robotic arm moves the probe to the corresponding receiving channel position, and collect the amplitude value of the frequency-converting vector network analyzer and the phase value , set the index line, store the data and automatically generate a graph, and the performance of each receiver channel of the sub-array antenna can be quickly determined; if there is a problem with the channel, repair it in time. Step S44: Run the receiving amplitude and phase trimming algorithm, obtain the amplitude trimming codes and phase trimming codes inside the sub-array antenna, and burn them into the sub-array wave control through the online program. Step S45: Run the automated test software again, set the frequency-converting vector network analyzer to the frequency-converting test state, and at the same time set the power and frequency of the signal source and the basic parameters of the robotic arm; control the full array opening of the receiving channels of the sub-array antenna and set the wave position to be measured at the point to be measured, and the probe collects the amplitude value at the specified position above the sub-array antenna according to the preset scanning trajectory. and the phase value , and the specified position is the near-field amplitude-phase data obtained at the position of the i-th row and j-th column, draw the near-field amplitude-phase diagram, and then the far-field radiation pattern of the sub-array reception can be obtained according to Step S6.

[0022] Further, Step S5 includes: Step S51: Connect port 1 of the frequency conversion vector network as the signal source output port to the probe, connect port 3 to the first local oscillator input port of the sub-array antenna, and connect the signal source output port to the second local oscillator input port of the sub-array antenna. Adjust the output power of the frequency conversion vector network and the signal source, and switch the sub-array antenna to the digital mode to ensure that the receiving channels and reference channels of the sub-array antenna are in the linear working area and have excellent signal-to-noise ratio. Step S52: Start the automated test software, power on the sub-array antenna in the receiving state, and set the output power, test frequency, and mixing test mode of the frequency conversion vector network and the signal source with one key. Set the basic parameters of the robotic arm. Step S53: Connect the fiber optic output port of the sub-array antenna through the digital sub-array measurement subsystem. Control the digital channels received by the sub-array antenna to be opened sequentially, perform signal processing on the digital board and control the artificial intervention of the sub-array digital board. Record and display the IQ data of each channel, and then compare the IQ data of each channel and the IQ data of the reference channel through the data analysis algorithm and parse them into corresponding amplitude values and phase values , and transmit the data back to the automated test software for plotting and index comparison to quickly verify the digital reception performance of the sub-array antenna. Step S53: Run the receiving amplitude and phase balancing algorithm to obtain the amplitude balancing code and phase balancing code of each digital channel in the sub-array antenna. Obtain the digital attenuation code and phase matching code through the solution algorithm and burn them into the digital beamformer through the online program. Step S54: Run the automated test software again and set the basic parameters of the robotic arm. Control all the receiving channels of the sub-array antenna to be fully opened and set the test points and test wave positions to be measured in the digital beamformer. The probe moves above the sub-array antenna according to the preset scanning trajectory, and the IQ data of the measured channels and the IQ data of the reference channel are collected, stored, and analyzed through the digital sub-array measurement subsystem to obtain the amplitude value and phase value at the specified position, obtain the near-field amplitude-phase data, and obtain the sub-array digital far-field pattern according to Step S6.

[0023] Furthermore, Step S7 includes: The level deviation of the i-th sub-array antenna at the frequency point to be measured is ; where is the deviation between the measured level value and the required value in the normal direction of each sub-array antenna, is the measured level value in the normal direction of each sub-array antenna, is the required level value in the normal direction of each sub-array antenna; The phase deviation of the i-th sub-array antenna at the frequency point to be measured is , is the deviation between the measured phase value in the normal direction of each sub-array and the required value of the index, is the measured phase value in the normal direction of each sub-array antenna, is the required value of the index in the normal direction of each sub-array antenna.

[0024] Further, step S8 includes: Based on the formula ; Combine the performance of the entire array; where and are the azimuth and elevation patterns of the entire phased array antenna respectively, F i_AZ and F i_EL are the far-field azimuth pattern and elevation pattern data of the i-th sub-array respectively; A i_AZ represents the azimuth amplitude pattern of a certain frequency point of the i-th sub-array, is the azimuth phase pattern of the i-th sub-array, Ai_EL represents the elevation amplitude pattern of a certain frequency point of the i-th sub-array, is the elevation phase pattern of the i-th sub-array.

[0025] Second Embodiment Based on the same inventive concept, the present invention also provides a fast sub-array test system for a production line, which adopts the above fast sub-array test method, including a dark box, a robotic arm, a radio frequency subsystem, a digital sub-array measurement subsystem, a sub-array blind plugging tooling, a sub-array installation platform subsystem and a control subsystem, and realizes the test of various states of the sub-array antenna on the production line by designing the test connection block diagram of the sub-array antenna and configuring the working state of the sub-array antenna; The dark box, made of metal plates and absorbing materials, is used to shield the environment, and the shielding performance is better than 60 dB by using metal plates and absorbing materials, so that the sub-array is not interfered by external signals during the test; and pulleys and locking devices are installed at the bottom of the dark box for movement, and lighting and monitoring equipment are installed inside for monitoring the test state of the sub-array antenna; The robotic arm includes a six-degree-of-freedom robotic arm and its control driver, which are combined to realize the X-direction, Y-direction, Z-direction movement of the probe and the rotation of the polarization axis; The radio frequency subsystem includes a frequency conversion vector network analyzer, a signal source, a probe, a horn, and a radio frequency cable, which form a radio frequency signal link with the sub-array antenna to be measured to realize the transmission and frequency conversion reception tests of the sub-array antenna; The digital sub-array measurement subsystem is used for sub-array digital signal acquisition and digital signal processing, and realizes the summary, analysis and sending back of the sub-array digital signals by sending test commands and monitoring the test state; The sub-array blind plugging tooling includes a power supply, a plug, a fan, a cable, a blind plug connector, etc., and is light in weight, used for quickly replacing the sub-array on the production line, efficiently completing the switching of the test state, and improving the test efficiency; The sub - array installation platform subsystem includes a telescopic slide, a swing adjustment table, and a laser rangefinder, which are used for installing the sub - array antenna to be measured, as well as position adjustment and distance adjustment. The control subsystem consists of a computer, a switch, a digital interface board, a synchronization board, and control cables, etc. It is used for controlling the RF subsystem, the general digital measurement subsystem, the robotic arm, etc., as well as data acquisition, algorithm implementation, and data analysis. This includes configuring various state parameters in the RF subsystem, setting various working state parameters of the sub - array to be measured, controlling the robotic arm, collecting and storing test data, and algorithms for in - sub - array channel balancing, near - far - field transformation of the radiation pattern, and data analysis and synthesis of the overall array radiation pattern for sub - array consistency, so as to achieve the display and analysis of test results. Among them, the data processing module in the control subsystem is used to sequentially collect the amplitude and phase information of the transmit state, receiver state, and digital state of a single channel of the sub - array antenna, achieve in - sub - array amplitude and phase balancing in various states through the balancing algorithm, then collect the amplitude and phase of the sub - array after balancing, and obtain the radiation pattern of the sub - array antenna in various states through the near - far - field transformation and probe compensation algorithm; synthesize the data of each sub - array antenna to obtain the radiation pattern of the overall array, and initially judge the performance of the overall array.

[0026] For Figure 2 the test of a 256 - channel sub - array antenna in the attachment, the overall array consists of 16 sub - arrays. The sub - array to be measured is installed on the sub - array blind - plug fixture shown in the attachment Figure 4 from the assembly production line; the blind - plug fixture has connectors such as power supply, fan, and quick - plug cable, which can realize the rapid installation and testing of the sub - array on the production line. Place the sub - array antenna installed on the blind - plug fixture on the sub - array installation platform in the dark box, and adjust the distance and position between the sub - array antenna and the probe by controlling the robotic arm, laser rangefinder, as well as the slide and swing table.

[0027] In this embodiment, the RF subsystem includes a frequency - conversion vector network analyzer, a signal source, a probe, a horn, and RF cables, which form an RF signal link with the sub - array to be measured, and realize the generation, transmission, reception, measurement, and compensation calibration of RF signals. Among them, the frequency - conversion vector network analyzer and the signal source achieve clock synchronization and realize the rapid switching of RF frequency and local oscillator frequency.

[0028] As Figure 4 shown, in this embodiment, the general digital measurement subsystem is used for sub - array digital signal acquisition and digital signal processing, and realizes the summary, analysis, and sending back of information of sub - array digital signals by sending test commands and monitoring test status, as Figure 5 shown.

[0029] In this embodiment, the control subsystem consists of a computer, a switch, a digital interface board, a synchronization board, and control cables, etc., to achieve the control of the RF subsystem, sub-array wave control, robotic arm, etc. The computer realizes the communication between the LAN interface and the data interface board and the robotic arm drive controller, and realizes the free setting of parameters such as the working mode of the sub-array, test frequency points, and the movement trajectory of the robotic arm. At the same time, by controlling the wave control machine, the transmit-receive switch selection and the distribution code of each radiation unit of the sub-array are realized. When collecting the amplitude and phase of a single channel, the frequency switching, wave control channel switch, and robotic arm work together. When testing the sub-array pattern, by controlling the frequency switching, wave position switching, and the movement speed and trajectory of the robotic arm, multi-frequency point and multi-wave position testing can be efficiently realized. The software interface is as Figure 6 shown.

[0030] In this embodiment, data processing mainly involves sequentially collecting the amplitude and phase information of the transmit state, RF receive state, and digital receive state of 601 frequency points of 256 channels of the sub-array, and realizing the amplitude and phase matching within the sub-array in various states through a trimming algorithm. Generally, only phase trimming is required for the transmit state. Then, the pattern of the trimmed sub-array is tested, and the pattern results of the sub-array in various states are obtained through near-field to far-field transformation and probe compensation algorithms. The transmit test is to verify the performance of the sub-array transmit channels, the consistency of the radiation power between sub-arrays, and the transmit pattern of the sub-array; the receive frequency conversion test is to verify the performance of the sub-array receiver channels, the consistency of the receiver performance between sub-arrays, and the receive pattern of the sub-array; the digital receive test is to verify the performance of the sub-array digital channels, the consistency of the digital receive performance between sub-arrays, and the digital pattern of the sub-array. Finally, by synthesizing the data of each sub-array, the pattern of the entire array is obtained, and the performance of the entire array can be preliminarily judged, as Figure 6 shown, where, Figure 6 (a) is the azimuth and elevation patterns of the i-th sub-array, Figure 6 (b) is the pattern of the entire array synthesized by m sub-arrays.

[0031] In this embodiment, by performing transmit, receive frequency conversion, and digital receive tests on a 256-channel sub-array on the production line, the performance and existing problems at each level are screened and diagnosed, effectively eliminating software and hardware problems, greatly improving the efficiency of subsequent large-scale array testing. The total test time for the three states of the X-band 256-channel sub-array in this embodiment is about 2 hours, with high state switching efficiency, fast test speed, flexible and efficient data processing, and the data can be quickly extracted for sub-array consistency analysis. By synthesizing the sub-array pattern into the entire array pattern, the performance of the entire array pattern can be preliminarily obtained, and the performance of the entire array can be effectively predicted Further, the robotic arm is used to perform rapid fixed-point acquisition along the sub-array plane according to the stroke and angle set by the host computer of the control subsystem. Compared with the traditional scanning frame, the robotic arm has more flexible movement and lower cost; the sub-array installation platform subsystem is used to adjust the positional relationship, parallelism and distance between the probe and the sub-array antenna to be measured.

[0032] Further, the RF subsystem is used to provide an excitation signal by the frequency conversion vector network when the sub-array antenna is in the transmitting state. The sub-array antenna amplifies and distributes the input excitation signal according to the control command, and then sends it to the TR component for amplification and output after passing through the integrated backplane; when the antenna sub-array is in the receiving state, the signal received by the sub-array antenna enters the TR component for amplification, and after being synthesized by the integrated backplane, it enters the receiver in the sub-array antenna and is down-converted to an intermediate frequency signal. Due to the different frequencies of the input and output signals, the traditional RF subsystem cannot meet the test requirements. It is necessary to provide a first local oscillator and a second local oscillator input signal to the sub-array through a four-port frequency conversion vector network combined with a signal source, and the other two ports receive the intermediate frequency signal to realize the performance test of each channel receiver; when the intermediate frequency signal enters the digital receiving channel for processing and is output through the optical fiber, the IQ signal output by the optical fiber can be collected by the digital sub-array measurement subsystem for digital receiving test.

[0033] Further, the digital sub-array measurement subsystem includes a processing module, an optical fiber sub-card, a COMe sub-card, a main control software, a preprocessing software, a host computer software, and cables, etc. It is used to receive the control commands from the host computer and forward them to the sub-array antenna, and summarize the downlink data and feedback information during the test. The downlink data is sent to the host computer for data analysis after being cached, and the feedback information is displayed in real time.

[0034] The above embodiments can be freely combined according to needs. The above description is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A fast sub-array testing method for a production line, characterized in that the steps Including: Step S1: Assign a unique identification number to several sub-array antennas to be tested on the production line, and burn the corresponding software version according to the technical specifications of each sub-array antenna, where the identification number i is a natural number greater than 0; Step S2: Install the sub-array to be tested on the sub-array blind plug tooling, and install the sub-array blind plug tooling on the sub-array installation platform. Adjust the parallelism between the sub-array antenna and the probe in the RF subsystem through the telescopic slide and swing adjustment table of the sub-array installation platform subsystem, and test the distance between the top of the probe and the sub-array antenna through the laser rangefinder in the sub-array installation platform subsystem, where the probe is used to detect the failed units or singular change regions on the aperture surface of the sub-array antenna; Step S3: Conduct a transmission mode test on the sub-array antenna through the RF subsystem to verify whether each transmission channel of the sub-array antenna is normal and whether the burned software version can normally control the switches and phase shifters corresponding to the channels in the sub-array antenna; Step S4: Conduct a receiving frequency conversion mode test on the sub-array antenna to verify the channel performance of each sub-array antenna and whether the software version can control the corresponding channel switches and phase shift attenuation; Step S5: Conduct a digital receiving test on the sub-array antenna to detect the digital channel performance and the performance of digital beamforming of the sub-array antenna; Step S6: Calculate the far-field azimuth pattern F and elevation pattern F of the antenna subarray at the specified position in the transmitting, receiving, and digital receiving states through the near-field to far-field transformation algorithm and the probe correction algorithm, and evaluate whether the performance of the antenna subarray meets the design requirements according to the preset standard for interpreting data; i_AZ and the elevation pattern F i_EL , and evaluate whether the performance of the antenna subarray meets the design requirements according to the preset standard for interpreting data; Step S7: After testing the far-field azimuth pattern F i_AZ i_AZ and the elevation pattern F i_EL i_EL of the sub-array antennas in the transmitting, receiving, and digital receiving states, perform consistency data comparison and analysis on each of the sub-array antennas; Step S8: According to the recorded far-field azimuth pattern Fi_AZ and elevation pattern Fi_EL data, perform vector synthesis based on the relative position relationship of the sub-array antennas, calculate the azimuth and elevation patterns of the entire array, thereby completing the analysis of the preset indicators of the entire array and preliminarily determining the performance of the entire array.

2. The rapid subarray testing method according to claim 1, wherein The said Step S3 includes: Step S31: Connect port 1 of the frequency conversion vector network in the RF subsystem as the source output port to the transmission port of the sub-array antenna, connect port 2 of the frequency conversion vector network to the probe, and adjust the output power of the vector network to make the sub-array antenna work in a saturated state; Step S32: Power on the sub-array antenna in the transmission state, start the automated test software in the control subsystem, and set the output power and test frequency of the vector network with one key. When the sub-array antenna is in the pulse working mode, synchronize the timing of the frequency conversion vector network and the sub-array antenna, and set the pulse width and pulse synchronization method of the frequency conversion vector network; Where channel 1 of port 1 is the S21 amplitude, channel 2 of port 2 is the S21 phase, and set the basic parameters of the robotic arm according to the preset standard, and the basic parameters include the scanning trajectory, scanning step size, and speed parameters; Step S33: Run the automated test software, control the transmission channels of the sub-array antenna to be turned on sequentially, move the probe through the positions corresponding to the transmission channels sequentially by the robotic arm, and use the frequency conversion vector network analyzer to test and store the amplitude values of the frequency points to be measured of the transmission channels and phase values , set the index line based on the set amplitude values and phase values, and use it to determine whether each of the transmission channels in the sub-array antenna is normal; Step S34: Run the transmission trimming algorithm, calculate the phase trimming codes of each transmission channel, and burn the phase trimming codes through the online program; Step S35: Run the automated test software again, set the basic parameters of the robotic arm, control the full array of the transmit channels of the sub-array antenna to open and set the wave positions to be measured at the points to be measured in a multi-frequency and multi-wave position manner, and the probe collects the amplitude values of the probe at the specified positions above the sub-array antenna according to the preset scanning trajectory and phase values , obtain the near-field amplitude-phase data, draw the near-field amplitude-phase diagram, and then the far-field radiation pattern of the sub-array transmission can be obtained according to Step 6 3. The fast sub-array test method according to claim 2, characterized in that The said Step S4 includes: Step S41: Connect the port 1 of the frequency conversion vector network as the signal source output port to the probe, connect port 3 to the first local oscillator input port of the sub-array antenna, connect the signal source output port to the second local oscillator input port of the sub-array antenna, connect the port 2 of the frequency conversion vector network to the intermediate frequency test port of the sub-array antenna, and connect port 4 of the frequency conversion vector network to the intermediate frequency reference port. Adjust the output power of the frequency conversion vector network and the signal source to meet the radio frequency and local oscillator signal requirements for sub-array testing; Step S42: Start the automated test software. When the receiving state of the sub-array antenna is full, set the output power, test frequency, and mixing test mode of the frequency conversion vector network and the signal source with one key. Channel 1 is for VC24 amplitude, channel 2 is for VC24 phase, and set the basic parameters of the robotic arm; Step S43: Run the automated test software, control the sub-array antenna receiving channels to be opened in sequence, move the probe to the corresponding receiving channel position by the robotic arm, and collect the amplitude value of the frequency conversion vector network and the phase value ; Step S44: Run the amplitude and phase trimming algorithm to obtain the amplitude trimming codes and phase trimming codes for each channel in the sub-array antenna, and burn them into the sub-array wave control through an online program; Step S45: Run the automated test software again, set the frequency conversion vector network to the frequency conversion test state, and at the same time set the signal source power and frequency as well as the basic parameters of the robotic arm; control all receiving channels of the sub-array antenna to be fully opened and set the wave position to be measured at the point to be measured, and the probe collects the amplitude value of the probe at the specified position according to the preset scanning trajectory above the sub-array antenna and the phase value , obtain the near-field amplitude-phase data, draw the near-field amplitude-phase diagram, and then obtain the far-field direction diagram of the sub-array reception according to Step S6.

4. The fast sub-array testing method according to claim 3, characterized in that The step S5 includes: Step S51: Connect the port 1 of the frequency conversion vector network as the signal source output port to the probe, connect port 3 to the first local oscillator input port of the sub-array antenna, connect the signal source output port to the second local oscillator input port of the sub-array antenna, and adjust the output power of the frequency conversion vector network and the signal source. The sub-array antenna switches to the digital mode, so that the receiving channels and reference channels of the sub-array antenna are in the linear working area and have excellent signal-to-noise ratio; Step S52: Start the automated test software. When the receiving state of the sub-array antenna is powered on, set the output power, test frequency, and mixing test mode of the frequency conversion vector network and the signal source with one key, and set the basic parameters of the robotic arm; Step S53: Connect the optical fiber output port of the sub-array antenna through the digital sub-array measurement subsystem, control the digital channels received by the sub-array antenna to be sequentially opened, perform signal processing on the digital board and control the manual intervention of the sub-array digital board, perform IQ data acquisition and feedback display for each of the channels, and then compare the IQ data of each of the channels and the IQ data of the reference channel through a data parsing algorithm and parse them into corresponding amplitude values and phase values , and transmit the data back to the automated test software for plotting and index comparison, which can quickly verify the digital reception performance of the sub-array antenna; Step S53: Run the amplitude and phase trimming algorithm to obtain the amplitude trimming codes and phase trimming codes for each digital channel in the sub-array antenna, obtain the digital attenuation codes and phase matching codes through the solution algorithm, and burn them into the digital beamformer through the online program; Step S54: Run the automated test software again, and set the basic parameters of the robotic arm; control all receiving channels of the sub-array antenna to be fully opened and set the wave position to be measured at the specified point to be measured in the digital beamformer. The probe moves above the sub-array antenna along the preset scanning trajectory, and the IQ data acquisition of the measured channel and the IQ data acquisition, storage and analysis of the reference channel are performed through the digital sub-array measurement subsystem to obtain the amplitude value at the specified position and the phase value , obtain the near-field amplitude-phase data, and obtain the sub-array digital far-field pattern according to step S6.

5. The fast subarray test method according to claim 4, wherein The step S7 includes: The level deviation of the i-th sub-array antenna at the frequency point to be measured is ; where is the deviation between the measured level value in the normal direction of each sub-array antenna and the required value of the index, is the measured level value in the normal direction of each sub-element array, is the required level value in the normal direction of each sub-array antenna; The phase deviation of the i-th sub-array antenna at the frequency point to be measured is , is the deviation between the measured phase value and the required value in the normal direction of each sub-array, is the measured phase value in the normal direction of each sub-array antenna, is the required value in the normal direction of each sub-array antenna.

6. The fast subarray testing method according to claim 5, characterized in that The step S8 includes: Based on the formula ; Combine the performance of the entire array; wherein, the and the are respectively the azimuth and elevation patterns of the entire array of the phased array antenna, The F i_AZ and F i_EL are respectively the far-field azimuth pattern and the elevation pattern data of the i-th sub-array; A i_AZ represents the azimuth amplitude pattern of a certain frequency point of the i-th sub-array, is the azimuth phase pattern of the i-th sub-array, Ai_EL represents the elevation amplitude pattern of a certain frequency point of the i-th sub-array, is the elevation phase pattern of the i-th sub-array.

7. A fast sub-array testing system for a production line, which adopts the fast sub-array testing method according to any one of claims 1 to 6, characterized in that, It includes a dark box, a robotic arm, a radio frequency subsystem, a digital sub-array measurement subsystem, a sub-array blind plugging tooling, a sub-array installation platform subsystem, and a control subsystem. By designing the test connection block diagram of the sub-array antenna and configuring the working state of the sub-array antenna, various state tests of the sub-array antenna on the production line are realized; The dark box, made of metal plates and absorbing materials, is used to shield the environment; and the bottom of the dark box is equipped with pulleys and locking devices for movement, and lighting and monitoring equipment are installed inside for monitoring the test state of the sub-array antenna; The robotic arm includes a six-degree-of-freedom robotic arm and its control driver, which are used to realize the X-direction, Y-direction, and Z-direction movement of the probe and the rotation of the polarization axis; The radio frequency subsystem includes a frequency conversion vector network, a signal source, the probe, a horn, and radio frequency cables, which form a radio frequency signal link with the sub-array antenna to be tested to realize the transmission and frequency conversion reception tests of the sub-array antenna; The digital sub-array measurement subsystem is used for sub-array digital signal acquisition and digital signal processing, and realizes sub-array digital signal aggregation, analysis and feedback information by sending test commands and monitoring the test status; The sub-array blind plug tooling is used for quickly replacing the sub-array on the production line and efficiently completing the test status switching; The sub-array installation platform subsystem includes a telescopic slide table, a swing adjustment table and a laser rangefinder, and is used for installing the sub-array antenna to be measured and position adjustment and distance adjustment; The control subsystem is used for controlling the RF subsystem, the general digital measurement subsystem and the robotic arm; wherein, the data processing module in the control subsystem is used for sequentially collecting the amplitude and phase information of the transmission state, receiver state and digital state of a single channel of the sub-array antenna, realizing amplitude and phase balancing within the sub-array in various states through a balancing algorithm, then performing amplitude and phase acquisition of the balanced sub-array, and obtaining the radiation pattern of the sub-array antenna in various states through near-field to far-field transformation and probe compensation algorithm; synthesizing the data of each sub-array antenna to obtain the radiation pattern of the entire array, and preliminarily judging the performance of the entire array.

8. The fast sub-array test system according to claim 7, wherein The robotic arm is used for quickly performing fixed-point acquisition along the sub-array plane according to the stroke and angle set by the host computer of the control subsystem; The sub-array installation platform subsystem is used for adjusting the positional relationship, parallelism and distance between the probe and the sub-array antenna to be measured.

9. The fast sub-array test system according to claim 8, wherein The RF subsystem is used for when the sub-array antenna is in the transmission state, the frequency conversion vector network provides an excitation signal, and the sub-array antenna amplifies and distributes the input excitation signal accordingly through a control command, and then sends it to the TR component for amplification and output after passing through the comprehensive backplane; when the antenna sub-array is in the receiving state, the sub-array antenna receives the signal and enters the TR component for amplification, and after being synthesized through the comprehensive backplane, it enters the receiver in the sub-array antenna and is down-converted to an intermediate frequency signal; when the intermediate frequency signal enters the digital receiving channel for processing and is output through an optical fiber, the digital sub-array measurement subsystem can collect the IQ signal output by the optical fiber for digital receiving test.

10. The fast sub-array test system according to claim 8, characterized in that, The digital sub-array measurement subsystem is used for receiving the control command from the host computer and forwarding it to the sub-array antenna, and aggregating the downlink data and feedback information during the test process. The downlink data is sent to the host computer for data analysis after being cached, and the feedback information is displayed in real time.

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