Test system and test method for satellite-borne digital array antenna multi-beam forming system

Abstract

The invention relates to the technical field of satellite communication and antenna system testing, and discloses a testing system for a satellite-borne digital array antenna multi-beam forming system, and the system comprises a testing device which is used for carrying out the communication interaction with a tested product, controlling a signal source, a frequency spectrograph and a power meter, carrying out the automatic testing, collecting data, and uploading the data to a computer analysis system; the power division switch module is used for distributing signals to receiving and transmitting channels according to the number of the receiving and transmitting channels of the tested product, and carrying out amplitude-phase consistency verification; the test backboard is used for converting an interface of a tested product into a universal interface compatible with test equipment and supporting self-loop or emission test; and the computer analysis system is used for receiving the test data, executing data analysis and generating an amplitude-phase consistency index. According to the invention, an amplitude-phase consistency test scheme of a module-level product is adopted, and each stage of an antenna system is covered. And meanwhile, the test can be carried out before the system is integrated, so that the complexity of later debugging is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of satellite communication and antenna system testing, in particular to a testing system and a testing method for a satellite-borne digital array antenna multi-beam forming system. Background Art

[0002] As a key device in modern satellite communication, remote sensing, navigation and other systems, satellite-borne digital array antennas are widely used in efficient and high-performance signal transmission and reception. With the continuous development of multi-beamforming technology, the complexity and performance requirements of antenna systems are also increasing. In order to ensure the stability and accuracy of the antenna system, it is necessary to perform precise amplitude and phase consistency tests on it, especially for effective verification at the module-level product stage. However, due to the high-frequency complexity of the antenna system and the interaction of multiple channels, traditional testing methods have certain limitations in practical applications.

[0003] At present, most existing technologies use amplitude and phase consistency testing after system integration, and usually only test after the integration of the antenna system is completed. These technologies mainly focus on the test of the transmission channel by testing the completed antenna system, and the verification of the receiving array element is often ignored. In addition, the test process in the existing technology usually relies on manual intervention. Frequent manual operations will affect the stability and accuracy of the test, and the analysis and report generation of the test results also rely on manual labor, making the entire test process cumbersome and time-consuming.

[0004] The testing methods in the existing technology are mainly focused on the stage after system integration, and often fail to timely discover potential problems in the early stages of product development, resulting in difficulties and inefficiencies in the later design and optimization process. Therefore, how to conduct comprehensive amplitude and phase consistency testing at the module level of the antenna system and realize automated control and data analysis has become an urgent problem to be solved. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a test system and a test method for a satellite-borne digital array antenna multi-beamforming system, which solves the problem in the prior art that a comprehensive module-level amplitude and phase consistency test is not performed in the early stage of antenna system development, thereby causing difficulties in later design optimization and low test efficiency.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A test system for a satellite-borne digital array antenna multi-beam forming system comprises: Test equipment, used to communicate and interact with the product under test, control the signal source, spectrum analyzer, and power meter, perform automated testing, and collect data and upload it to a computer analysis system; The power division switch module is used to distribute signals to the receiving and transmitting channels according to the number of receiving and transmitting channels of the product under test, and to verify the amplitude and phase consistency; Test backplane, used to convert the interface of the product under test into a universal interface compatible with the test equipment, and supports self-loop or transmission testing; A computer analysis system, for receiving test data and performing data analysis to generate amplitude and phase consistency indicators; Automatic control software is used to control the frequency and power parameters of signal sources, power division switch modules and other devices, and perform automatic testing.

[0007] Preferably, the power division switch module includes a plurality of independent signal paths, and can selectively distribute signals to different receiving and transmitting channels according to test requirements, so as to perform corresponding amplitude and phase consistency verification.

[0008] Preferably, the test backplane supports connecting the transmission channel loop of the product under test to the receiving channel to perform transmission channel consistency verification.

[0009] Preferably, the computer analysis system calculates and generates a phase consistency index and an amplitude consistency index by processing multiple groups of test data. The phase consistency index includes the mean and variation range of the phase difference between channels at each frequency point, and the amplitude consistency index includes the deviation between the maximum and minimum values ​​during the test.

[0010] Preferably, the automation control software is used to perform periodic power-off operations to simulate different operating conditions and verify the stability of the antenna system.

[0011] The present invention also provides a method for testing a satellite-borne digital array antenna multi-beam forming system, comprising the following steps: Step 1: Under the condition of temperature balance, the signal source outputs signals of multiple frequencies, the power division switch module distributes the signals to multiple receiving channels of the product under test, and collects data; Step 2: Adjust the power of the signal source to ensure that the signal power of each receiving channel is within an appropriate range; Step 3: Repeat the output of the signal of each frequency point, and collect the data of each receiving channel respectively, and collect multiple sets of data for subsequent analysis; Step 4: Based on the collected multiple sets of data, calculate the phase difference and amplitude difference of each channel at each frequency point to obtain the phase consistency index and amplitude consistency index of the receiving channel; Step 5: After fully verifying the receiving channel, test the transmitting channel. The steps are the same as the receiving channel consistency test. Verify the consistency of the transmitting channel through the verified receiving channel loop.

[0012] Preferably, during the test, changes in frequency and power are controlled by automated control software and are switched and configured based on a preset test plan.

[0013] Preferably, the amplitude and phase consistency indexes of the receiving and transmitting channels are calculated by analyzing the test data, wherein the amplitude consistency index is obtained by calculating the maximum and minimum deviations of the test signals, and the phase consistency index is obtained by calculating the mean phase difference between the channels and its variation range.

[0014] Preferably, during the test, the automated control software controls the power-off and power-on operations of the test equipment according to a preset time interval to verify the stability of the multi-beam antenna system.

[0015] Preferably, the data analysis process includes processing the test results of multiple frequency points and multiple channels, generating a report including amplitude and phase consistency indicators and performance evaluation, and evaluating the overall performance of the antenna system.

[0016] The present invention provides a test system and a test method for a satellite-borne digital array antenna multi-beam forming system. It has the following beneficial effects: 1. The present invention adopts the amplitude and phase consistency test scheme of module-level products, covering all stages of the antenna system. At the same time, the test can be carried out before the system is integrated, effectively reducing the complexity of later debugging. Compared with the test method in the prior art that is usually only carried out after the system is integrated, the scheme of the present invention makes the system design and optimization more efficient and avoids the trouble of repeated modifications in the later stage.

[0017] 2. The present invention flexibly distributes signals to multiple receiving and transmitting channels through the power division switch module, and can simultaneously verify the consistency of the transmitting and receiving array elements. In this way, not only the test efficiency is improved, but also a more comprehensive performance verification is ensured. Most of the existing technologies only focus on the testing of the transmitting channel and ignore the inspection of the receiving array elements. The present invention fills this gap and ensures the overall stability of the antenna system.

[0018] 3. The automated control software of the present invention reduces human intervention, can automatically perform periodic power-off operations, and simulate stability tests under different working conditions. This technical solution greatly improves the repeatability and consistency of the test and reduces errors caused by human factors. Compared with the prior art that relies on human intervention and unstable test results, the automated solution of the present invention ensures the efficiency and reliability of the test process.

[0019] 4. The present invention fully automates the data analysis and report generation during the test process, reducing the manual analysis time of engineers and significantly improving the test speed and accuracy. Compared with the cumbersome steps of manual analysis and report generation in traditional technologies, the present invention makes the test results more immediate and accurate, which helps to accelerate the R&D and production cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1One of the hardware system design block diagrams of the present invention; Figure 2 The second block diagram of the hardware system design of the present invention; Figure 3 The power split switch module circuit design block diagram of the present invention; Figure 4 It is a schematic diagram of the principle of the test backplane of the present invention; Figure 5 It is a schematic diagram of the method flow of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions 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.

[0022] Please see attached Figure 1-4 The embodiment of the present invention provides a test system for a satellite-borne digital array antenna multi-beam forming system, comprising: Test equipment, used to communicate and interact with the product under test, control the signal source, spectrum analyzer, and power meter, perform automated testing, and collect data and upload it to a computer analysis system; The power division switch module is used to distribute signals to the receiving and transmitting channels according to the number of receiving and transmitting channels of the product under test, and to verify the amplitude and phase consistency; Test backplane, used to convert the interface of the product under test into a universal interface compatible with the test equipment, and supports self-loop or transmission testing; A computer analysis system, for receiving test data and performing data analysis to generate amplitude and phase consistency indicators; Automatic control software is used to control the frequency and power parameters of signal sources, power division switch modules and other devices, and perform automatic testing.

[0023] The power splitter switch module includes multiple independent signal paths, which can selectively distribute signals to different receiving and transmitting channels according to test requirements to perform corresponding amplitude and phase consistency verification.

[0024] The test backplane supports connecting the transmit channel loop of the product under test to the receive channel to verify the consistency of the transmit channel.

[0025] The computer analysis system calculates and generates phase consistency index and amplitude consistency index by processing multiple sets of test data. The phase consistency index includes the mean and variation range of the phase difference between channels at each frequency point, and the amplitude consistency index includes the deviation between the maximum and minimum values ​​during the test.

[0026] Automated control software is used to perform periodic power-off operations to simulate different operating conditions and verify the stability of the antenna system.

[0027] Please see attached Figure 5 The present invention also provides a method for testing a satellite-borne digital array antenna multi-beam forming system, comprising the following steps: Step 1: Under the condition of temperature balance, the signal source outputs signals of multiple frequencies, the power division switch module distributes the signals to multiple receiving channels of the product under test, and collects data; Step 2: Adjust the power of the signal source to ensure that the signal power of each receiving channel is within an appropriate range; Step 3: Repeat the output of the signal of each frequency point, and collect the data of each receiving channel respectively, and collect multiple sets of data for subsequent analysis; Step 4: Based on the collected multiple sets of data, calculate the phase difference and amplitude difference of each channel at each frequency point to obtain the phase consistency index and amplitude consistency index of the receiving channel; Step 5: After fully verifying the receiving channel, test the transmitting channel. The steps are the same as the receiving channel consistency test. Verify the consistency of the transmitting channel through the verified receiving channel loop.

[0028] During the test, frequency and power changes are controlled by automated control software and are switched and configured based on a preset test plan.

[0029] By analyzing the test data, the amplitude and phase consistency indicators of the receiving and transmitting channels are calculated. The amplitude consistency indicator is calculated by the maximum and minimum deviations of the test signals, and the phase consistency indicator is calculated by the mean phase difference between each channel and its variation range.

[0030] During the test, the automated control software controls the power-off and power-on operations of the test equipment according to preset time intervals to verify the stability of the multi-beam antenna system.

[0031] The data analysis process includes processing the test results of multiple frequencies and multiple channels, generating reports, including amplitude and phase consistency indicators and performance evaluation, and evaluating the overall performance of the antenna system.

[0032] In this embodiment, the power division switch module is used to effectively distribute the signal to different receiving channels and transmitting channels to realize the amplitude and phase consistency verification of the multi-beam forming system of the satellite-borne digital array antenna. The power division switch module can accurately control the path of the signal according to the signal requirements, thereby ensuring the effective transmission of the signal, and has flexible switching capabilities during the test process.

[0033] The main function of the power division switch module in this embodiment is to distribute the signal output by the signal source to different channels according to different test requirements. The design of the power division switch module ensures the efficiency and accuracy of the system, so that the test system can verify the performance of the receiving and transmitting channels one by one without interfering with other channels. In particular, the power division switch module plays an important role in verifying the amplitude and phase consistency.

[0034] In general, the working principle of the power splitter switch module is based on electronic switching technology, which selects different signal paths by controlling the switch elements in the circuit. After the signal is input from the power splitter switch module, it can be distributed to the required receiving or transmitting channel through different switching logics. Every time the signal is switched, the circuit inside the module will automatically adjust to ensure that the signal will not be disturbed after switching and maintain the consistency of its phase and amplitude.

[0035] As an option, the power splitter switch module includes multiple independent signal paths that allow the signal to be flexibly and selectively distributed to multiple receiving channels or transmitting channels according to test needs. Specifically, the switching elements (such as relays or switch chips) inside the module can switch between different channels to ensure that each channel can receive the required test signal. This feature makes the power splitter switch module more adaptable and accurate when testing multiple channels.

[0036] In one possible implementation, the power splitter switch module is controlled by automated control software, which accurately switches different signal paths according to a preset test plan. This control method can reduce manual intervention and improve test efficiency and accuracy. In addition, the control logic of the power splitter switch module can dynamically adjust the signal distribution method according to the needs of each test channel to ensure the continuity and stability of the test.

[0037] In some embodiments, the number of output channels of the power splitter switch module can be customized according to the number of channels of the product under test. For example, in some high-performance antenna systems, the power splitter switch module may need to support more channel switching so as to test more receiving and transmitting channels at the same time.

[0038] Specifically, the working principle of the power division switch module can be further explained by the following formula: ; in, For the output signal path, is the total number of channels, Indicates that the signal is Amplitude adjustment on each path, Indicates The selection state of each signal path (for example, 1 indicates signal path selection, 0 indicates no selection).

[0039] Amplitude-phase consistency calculation formula: ; in, Indicates The phase difference of the channels, and Respectively The phase of the channel and the reference channel.

[0040] Amplitude consistency calculation formula: ; in, For the The phase difference of the receiving channels, and are the maximum and minimum values ​​of all test points respectively. This formula calculates the maximum and minimum amplitude differences to obtain the amplitude consistency index, thus ensuring the amplitude stability of the received signal.

[0041] This formula processes the phase difference and calculates the amplitude consistency to ensure that each channel performs consistently under parameters such as frequency and power.

[0042] In some embodiments, the power splitter switch module can also perform fault detection according to actual needs. When a channel fails, the power splitter switch module can automatically switch to a backup path through a detection mechanism to ensure the continuation of the test. This fault detection and recovery mechanism can improve the reliability of the system and ensure stability in long-term operation.

[0043] As an option, the switching speed and accuracy of the power splitter switch module can be customized according to the test requirements. For high-frequency signal testing, the power splitter switch module can complete the signal path switching in a very short time, thereby reducing the delay in the signal switching process. By increasing the switching speed, the power splitter switch module can adapt to higher frequency test requirements.

[0044] In a possible implementation, the power splitter switch module also has an embedded self-diagnosis function. During automated testing, the power splitter switch module can automatically detect its working status and adjust the switching logic according to the detection result to ensure that the signal path is always in the best state during the test.

[0045] In this embodiment, the power splitter switch module is an important part of the test system, which is mainly responsible for distributing the signal output by the signal source to different receiving channels and transmitting channels according to requirements. By precisely controlling the signal path, the power splitter switch module ensures that the signal can be transmitted on demand, thereby realizing the amplitude and phase consistency test of each channel. The power splitter switch module plays a vital role in signal distribution and testing, ensuring the accuracy and efficiency of the entire test process.

[0046] Generally speaking, power splitter switch modules use efficient circuit switching technology to select different signal paths through built-in switching elements. This switching mechanism enables signals to be accurately distributed among multiple channels and ensures that the signals of each channel remain consistent in frequency and amplitude.

[0047] As an option, the power splitter switch module is designed to support multiple parallel signal paths, so that the signal can be distributed to multiple receiving channels or transmitting channels at the same time according to the test requirements. In some high-performance antenna systems, the power splitter switch module can support simultaneous switching of more channels to adapt to complex test environments. With this design, the test system can verify multiple channels at the same time, greatly improving test efficiency.

[0048] Specifically, the power splitter switch module can flexibly switch between the receiving channel and the transmitting channel. Whenever the signal source outputs a signal, the power splitter switch module selectively distributes the signal to different channels according to the test needs. This process is achieved through the switching elements in the circuit, where the selection state of each signal path is determined by the control logic. The control logic is usually managed by automated control software to ensure the real-time and accuracy of signal distribution and switching.

[0049] In one possible implementation, the power splitter switch module consists of multiple independent signal paths, allowing flexible selection of appropriate channels for signal transmission according to test requirements. For example, in some high-bandwidth applications, the power splitter switch module can support the simultaneous distribution of signals at multiple frequencies to multiple channels, thereby improving the parallelism and efficiency of the test. The switching of these signal paths can be coordinated by automated control software to ensure that the signal distribution of each test channel is correct.

[0050] As an option, the switching time and accuracy of the power splitter switch module can be adjusted according to specific test requirements. In high-frequency signal testing, fast switching capability is particularly important. The power splitter switch module can complete the switching of signal paths in a very short time to ensure signal accuracy and consistency during the test. Through this fast switching mechanism, the test system can perform accurate amplitude and phase consistency verification under high frequency conditions.

[0051] In some embodiments, the power splitter switch module can also perform fault detection and recovery functions. If a channel is found to be faulty during the test, the power splitter switch module will immediately trigger the switch and automatically switch the signal to the backup path to ensure that the test is not interrupted. This design enhances the reliability and fault tolerance of the system and avoids possible interference or signal loss during the test.

[0052] In one possible implementation, the power splitter switch module uses adaptive technology to automatically adjust the signal path according to the real-time test requirements of the system. Through this adaptive adjustment, the power splitter switch module can flexibly respond to different test tasks and provide more efficient test support.

[0053] In the entire test system, the test backplane plays a vital role. It is mainly used to convert the interface of the product under test into a universal interface compatible with the test equipment, so as to ensure that the signal can be smoothly transmitted to each test module. The test backplane ensures the signal flow between the test equipment and the antenna under test by realizing physical connection, and supports the input and output of multi-channel signals to ensure the integrity and effectiveness of the test.

[0054] The test backplane in this embodiment closely cooperates with the aforementioned power division switch module and the receiving channel and transmitting channel to ensure that the signal can be transmitted accurately and the amplitude and phase consistency can be verified during the multi-channel test. The test backplane provides the necessary connection functions for the test system through the conversion of the physical interface and the redistribution of the electrical signal. Through the test backplane, after the signal is output from the test equipment, it can be stably transmitted to each port of the antenna under test, and the corresponding test and verification can be carried out.

[0055] Generally, the test backplane is designed with multi-channel and multi-band signal transmission requirements in mind, so its interface type and layout can usually be customized according to the characteristics of the product under test. In some antenna systems with a high number of channels, the design of the test backplane can include multiple signal interfaces to support high-density signal input and output. In addition, the test backplane also has the function of supporting self-loop or transmission testing, ensuring the verification between the transmission channel and the receiving channel through the loopback connection.

[0056] As an option, the test backplane adopts a modular design. This design allows flexible addition or reduction of signal interfaces according to different test requirements, thereby improving the adaptability and scalability of the system. For example, the test backplane can be equipped with additional signal connection ports to meet the requirements of higher channel counts or more complex test requirements. In addition, the test backplane can be seamlessly connected with the signal source and analysis system in the test equipment to achieve automated signal transmission and testing.

[0057] Specifically, the test backplane plays a vital role in the signal transmission process. During the receiving channel verification phase, the signal is output from the power splitter switch module and connected to the receiving port of the antenna under test through the test backplane for amplitude and phase consistency testing. Similarly, during the transmitting channel verification phase, the test backplane loops the signal back to the receiving channel to verify the consistency of the transmitting channel. In this process, the test backplane ensures the integrity and consistency of the signal through the high-quality connection of its interface and precise signal transmission.

[0058] In some embodiments, the test backplane also supports fault diagnosis. When a problem occurs in the signal transmission of a certain channel, the test backplane can quickly identify and report the fault location through the monitoring system, thereby providing effective feedback. The introduction of this function further enhances the stability and reliability of the system.

[0059] As an option, the test backplane design also takes into account the processing requirements of high-frequency signals. In high-frequency test environments, signal attenuation and noise problems are often more serious. Therefore, the test backplane is designed with special signal transmission technology, such as low-loss transmission lines and high-quality connectors, to ensure the stability and accuracy of signal transmission.

[0060] In one possible implementation, the test backplane is managed by automated control software, which is not only responsible for switching signal paths, but also for monitoring the signal transmission status in real time. The test backplane can automatically adjust the signal interface and connection mode at different test stages by working in conjunction with the control software to ensure the smooth progress of the test process.

[0061] In some embodiments, the test backplane is also equipped with an embedded signal conditioning function that can adjust the received signal in real time to compensate for signal attenuation or interference. This conditioning function enables the test system to cope with various complex test environments and ensure that the signal is always kept in the optimal state during the entire test process.

[0062] In this embodiment, the computer analysis system is one of the core components of the entire test system, responsible for receiving data from the test equipment and processing, analyzing and evaluating the data in real time. The computer analysis system calculates the corresponding performance indicators, such as phase consistency and amplitude consistency, based on the test data of each channel, generates a detailed test report, and evaluates the overall performance of the antenna system. By working in collaboration with the aforementioned power division switch module, test backplane and automated control software, the computer analysis system can efficiently complete multi-channel and multi-band test tasks.

[0063] Generally, the computer analysis system includes an efficient processing unit, a data storage module, and a user interface for interaction. The computer analysis system receives signal data from the test equipment, performs a series of mathematical analysis operations, and generates performance evaluation indicators including phase consistency and amplitude consistency. These indicators provide data support for further optimizing the antenna system design and verifying the system stability.

[0064] As an option, the computer analysis system can work seamlessly with the control module of the test equipment and automated control software to automatically perform data acquisition, preprocessing, formula calculation, etc. This design reduces manual operations and improves the efficiency and accuracy of the test. In addition, the computer analysis system also has efficient parallel computing capabilities and can process data from multiple frequencies and channels at the same time, meeting the testing needs of large-scale antenna systems.

[0065] Specifically, the computer analysis system uses a pre-set test formula to analyze data and obtain phase consistency and amplitude consistency indicators at each frequency point. During the data acquisition phase, the test equipment acquires and transmits signal data from the receiving channel, and the computer analysis system denoises, processes, and calibrates these data to ensure data accuracy. Afterwards, the system generates corresponding test results based on the designed calculation method and further evaluates the signal consistency between the receiving channel and the transmitting channel.

[0066] In some embodiments, the computing module of the computer analysis system includes multiple processing cores, which accelerate the data processing speed through parallel computing technology. This design enables the computer analysis system to complete the analysis task of a large amount of data in a short time, thereby improving the test efficiency. In particular, when testing large-scale antenna systems, the computer analysis system can quickly calculate the performance indicators of each test channel and generate real-time test reports.

[0067] As an option, the computer analysis system can generate different types of reports based on test requirements. For example, the system can generate phase consistency and amplitude consistency indicators for each frequency point, and the report includes detailed information such as the maximum and minimum deviations, the mean and range of phase differences at each frequency point. These indicators help testers determine whether the antenna system meets the expected performance standards, and thus provide a decision-making basis for product design and optimization.

[0068] In one possible implementation, the computer analysis system can also perform comparative analysis based on historical test data to generate a chart showing the changing trend of system performance. This function is suitable for long-term testing and performance evaluation, and can help technicians detect the stability and reliability of the antenna system under different conditions. In addition to basic performance indicators, the report can also include stability analysis results to evaluate the long-term performance of the antenna system.

[0069] Specifically, after each test is completed, the computer analysis system will generate a report including all key test data and performance evaluation indicators. These reports will help engineers understand the performance of the antenna system in actual operation and guide subsequent design improvements or production optimization.

[0070] In some embodiments, the computer analysis system is also equipped with a self-learning algorithm to optimize data processing and analysis methods through continuous feedback of test results. The introduction of this technology enables the computer analysis system to adaptively adjust the test strategy and analysis method according to different types of antenna systems, thereby more accurately evaluating the performance of various types of antennas.

[0071] In the test system, the automation control software undertakes the core control task, responsible for coordinating and managing the work between various components such as test equipment, power division switch modules, and computer analysis systems. Through the scheduling and management of the automation control software, the system can achieve precise control of the signal source, test equipment, and each test module to ensure the smooth progress of the test process. The automation control software improves the efficiency and accuracy of the test process through comprehensive management of the test process and reduces the need for manual intervention.

[0072] In this embodiment, the main functions of the automatic control software include: frequency and power control of the signal source, path switching of the power division switch module, real-time acquisition of signal data, operation instruction scheduling of the test equipment, and test data upload and result generation of the computer analysis system. The software is connected to the interface of each module to ensure that each test step is automatically executed according to the preset plan, and the test parameters can be adjusted in real time to meet different test requirements.

[0073] Generally, the automation control software will interact with computer analysis systems, test equipment, and power splitter modules in real time. Through automation control, the system can perform operations such as frequency adjustment, power setting, and path switching of the signal source according to the test plan, and can adjust the test conditions according to real-time data. This automation process not only improves test efficiency, but also effectively reduces the occurrence of human errors.

[0074] As an option, the automation control software also has the ability to execute periodically. It can automatically switch test channels, perform frequency switching and power adjustment at set time intervals to meet test requirements under different frequency conditions. In addition, the software can automatically complete test tasks of multiple channels and multiple frequencies based on preset test plans, thereby improving the overall efficiency of the test system.

[0075] Specifically, the operation process of the automated control software includes: receiving the signal data sent by the test equipment, calculating the required frequency, power and channel switching instructions, updating the test status in real time, and adjusting the parameters of the signal source as needed. The software controls the signal source through programming to ensure that the signal output of each frequency point is stable, and after each frequency point test is completed, it automatically switches to the next frequency point for testing. At the same time, the software also needs to monitor the working status of the test equipment in real time to ensure smooth coordination of each module.

[0076] In some embodiments, the scheduling system of the automated control software can support parallel testing of multiple frequencies and channels. When the test task involves multiple frequency bands, the software can automatically switch the test frequency and switch the signal path of the power splitter switch module as needed to ensure that the test signal can be transmitted to the correct receiving or transmitting channel. In addition, the software can also synchronize the data of each module in real time to ensure that the test data of each channel is accurately recorded.

[0077] As an option, the automation control software also has a self-diagnosis function that can monitor the working status of the test equipment and each module in real time. When a module fails, the software can automatically alarm and perform preset recovery operations. This function enhances the stability of the test process and the fault tolerance of the system, avoiding test interruptions caused by module failures.

[0078] In one possible implementation, the automated control software is combined with the data acquisition system in the test equipment to obtain all test data in real time during the test process and upload it to the computer analysis system for subsequent processing. Through the data upload interface, the automated control software can ensure that each data item can be transmitted in time so that the analysis system can generate the corresponding test report. In addition, the automated control software can adjust the test parameters according to the feedback from the computer analysis system to optimize the test results.

[0079] In some embodiments, the automated control software can also make dynamic adjustments based on historical test data and real-time feedback. For example, if the test result of a certain frequency point does not meet expectations, the software can adjust the test plan according to a preset optimization strategy, such as increasing the test frequency point, adjusting the test power, etc., to ensure that the system performance reaches the expected level.

[0080] Under the same ambient temperature conditions, after the product reaches thermal equilibrium, use the signal source to output n fixed frequency points in sequence (n is determined by the bandwidth of the specific project, generally 2 frequency points are selected for a 50MHz bandwidth), and the power division switch circuit-1 and power division switch circuit-2 modules of the test tooling output multiple signals after power division, which are respectively connected to all receiving channels of the multiple modules under test, and then the signal source power is adjusted to ensure that the signal power of the module receiving port after power division is an appropriate value (the port receiving power is determined according to the specific receiving link design). Among them, the frequency and power are automatically controlled by software. The test frequency and power need to be manually designed in advance according to the application characteristics of the product, and then automatically switched and configured through the software. When the signal source outputs each frequency point, a set of data is collected for all receiving channels; then the frequency point is switched to collect the next set of data, and a total of n sets of data are collected. This process is repeated. times, with a power-off interval of 20 seconds each time, and a total of n× groups of data were collected.

[0081] Data Analysis: a) Analyze all The SFDR of group data can obtain the input dynamic index; b) When testing at each frequency point, the average phase difference of 16384 sample points between all channels and channel 1 after temperature equilibrium ( Change in power-on test , we can get the corrected zero bias ( ), which is the index of the phase consistency of the receiving channel, as shown in Formula 1-3: ; ; ; in: is the base effective power-on sequence number, is the last valid power-on sequence number, ( ; is the number of valid power-on sequence numbers; is the channel number, 2≤m≤144; : No. Power on, channel Between channel 1 The phase of each sample point; : No. Power on, channel The phase difference with channel 1 and the change of the ath power-on; : No. Change of power-on phase difference , the result after zero bias processing.

[0082] c) During each test, all channels collect the power of the same frequency point (16384 samples) , we can get the deviation between the maximum and minimum values ​​in this test , which is the index of the receiving channel amplitude consistency, as shown in Formula 4: ; Under the same ambient temperature conditions, after the product reaches thermal equilibrium, the transmission channels of multiple modules under test output A fixed frequency point is looped back to the multi-channel receiving channel of the same module after the test tooling power division switch circuit-2 module switch selection. All transmission channels are co-frequency coherent. When each frequency point is output, multiple receiving channels collect data at the same time; after switching the frequency point, the next set of data is collected, and a total of n sets of data are collected. Re-power on and initialize, and the frequency point is output again and data is collected, and this is repeated. times, each power-off interval is 20 seconds, a total of Group data.

[0083] Data Analysis: a) Analyze all The output power and spurious of the group data can be converted to obtain the output power and spurious of all transmission channels; b) When testing each frequency point, the phase difference of 16384 samples between all channels and channel 1 The mean , after temperature equilibrium ( Change in power-on test , we can get the corrected zero bias ( ), which is the phase consistency index of the transmitting channel. The calculation method is the same as formula 1-3; During each test, all channels collect the power of the same frequency point (16384 samples) , we can get The deviation between the maximum and minimum values ​​in the test , that is, the transmit channel amplitude consistency test is qualified, and the calculation method is the same as formula 4.

[0084] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test system for a satellite-borne digital array antenna multi-beam forming system, characterized in that: include: Test equipment, used to communicate and interact with the product under test, control the signal source, spectrum analyzer, and power meter, perform automated testing, and collect data and upload it to a computer analysis system; The power division switch module is used to distribute signals to the receiving and transmitting channels according to the number of receiving and transmitting channels of the product under test, and to verify the amplitude and phase consistency; Test backplane, used to convert the interface of the product under test into a universal interface compatible with the test equipment, and supports self-loop or transmission testing; A computer analysis system, for receiving test data and performing data analysis to generate amplitude and phase consistency indicators; Automatic control software is used to control the frequency and power parameters of signal sources, power division switch modules and other devices, and perform automatic testing.

2. The test system for the satellite-borne digital array antenna multi-beam forming system according to claim 1, characterized in that: The power division switch module includes multiple independent signal paths, and can selectively distribute signals to different receiving and transmitting channels according to test requirements to perform corresponding amplitude and phase consistency verification.

3. The test system for the satellite-borne digital array antenna multi-beam forming system according to claim 1, characterized in that: The test backplane supports connecting the transmission channel loop of the product under test to the receiving channel to perform transmission channel consistency verification.

4. The test system for the satellite-borne digital array antenna multi-beam forming system according to claim 1, characterized in that: The computer analysis system calculates and generates a phase consistency index and an amplitude consistency index by processing multiple groups of test data. The phase consistency index includes the mean and variation range of the phase difference between channels at each frequency point, and the amplitude consistency index includes the deviation between the maximum and minimum values ​​during the test.

5. The test system for the satellite-borne digital array antenna multi-beam forming system according to claim 1, characterized in that: The automation control software is used to perform periodic power-off operations to simulate different working conditions and verify the stability of the antenna system.

6. A method for testing a satellite-borne digital array antenna multi-beam forming system, according to a test system for a satellite-borne digital array antenna multi-beam forming system according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Under the condition of temperature balance, the signal source outputs signals of multiple frequencies, the power division switch module distributes the signals to multiple receiving channels of the product under test, and collects data; Step 2: Adjust the power of the signal source to ensure that the signal power of each receiving channel is within an appropriate range; Step 3: Repeat the output of the signal of each frequency point, and collect the data of each receiving channel respectively, and collect multiple sets of data for subsequent analysis; Step 4: Based on the collected multiple sets of data, calculate the phase difference and amplitude difference of each channel at each frequency point to obtain the phase consistency index and amplitude consistency index of the receiving channel; Step 5: After fully verifying the receiving channel, test the transmitting channel. The steps are the same as the receiving channel consistency test. Verify the consistency of the transmitting channel through the verified receiving channel loop.

7. The method for testing a satellite-borne digital array antenna multi-beam forming system according to claim 6, characterized in that: During the test, frequency and power changes are controlled by automated control software and are switched and configured based on a preset test plan.

8. The method for testing a satellite-borne digital array antenna multi-beam forming system according to claim 6, characterized in that: By analyzing the test data, the amplitude and phase consistency indicators of the receiving and transmitting channels are calculated. The amplitude consistency indicator is calculated by the maximum and minimum deviations of the test signals, and the phase consistency indicator is calculated by the mean phase difference between each channel and its variation range.

9. The method for testing a satellite-borne digital array antenna multi-beam forming system according to claim 7, characterized in that: During the test, the automated control software controls the power-off and power-on operations of the test equipment according to preset time intervals to verify the stability of the multi-beam antenna system.

10. The method for testing a satellite-borne digital array antenna multi-beam forming system according to claim 6, characterized in that: The data analysis process includes processing the test results of multiple frequency points and multiple channels, generating a report, including amplitude and phase consistency indicators and performance evaluation, and evaluating the overall performance of the antenna system.

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