Automatic test system for dual-frequency dual-polarized antenna array surface

Abstract

The invention relates to an automatic test system for a dual-frequency dual-polarized antenna array plane. The automatic test system comprises a main control computer, a time sequence generator, a beam controller, a vector network analyzer, a radio frequency transceiver module, a power meter, a primary power supply, a power-on and power-off enabling module and the dual-frequency dual-polarized antenna array plane, the main control computer is respectively connected with the time sequence generator, the power-on and power-off enabling module, the vector network analyzer, the primary power supply and the power meter through network cables; a transmit-receive total port of each frequency band of the dual-frequency dual-polarized antenna array plane is connected with the radio frequency transmit-receive module. Each secondary power supply is connected with the primary power supply and the power-on and power-off enabling module. The radio frequency transceiver module is connected with the vector network analyzer through a radio frequency cable; the time sequence generator is connected with the beam controller, the radio frequency transceiver module and the vector network analyzer through control cables. The system has the characteristics of automatic selection of working frequency bands and polarization channels, automatic switching of transmitting and receiving links, real-time monitoring of working current and working temperature, real-time monitoring of transmitting calibration power and the like.

Description

Technical Field

[0001] The present invention relates to the field of antenna microwaves, and in particular to an automatic testing system for a dual-frequency dual-polarization antenna array. Background Art

[0002] With the continuous development of phased array radar technology, the application of multi-band, multi-polarization common aperture antenna arrays is becoming increasingly widespread [1]. In the field of SAR imaging, the combination of high- and low-frequency band antennas has obvious advantages. When antennas of different frequency bands are nested on the same radar antenna aperture, they can provide richer imaging area information [2]. In the field of target detection, dual-band radar can significantly improve the time and energy resources of radar equipment by matching high and low frequency bands and optimizing resource utilization, and has obvious advantages in multi-target measurement, target recognition, joint anti-interference, etc. [3].

[0003] Currently, there are many references to the test methods for the directional pattern of multi-polarized antenna arrays, but there are few references to the calibration performance test systems for multi-band and multi-polarized antenna arrays. Reference [4] proposed a test method for the beam scanning characteristics of passive array antennas. The near-field amplitude and phase data of each antenna unit are obtained through a planar near-field scan. The near-field data of the scanned beam is then calculated through a digital beam synthesis method. The beam scanning characteristics of the passive array antenna are obtained through near-far field transformation. Reference [5] proposed a dual-polarized multi-task planar near-field test system. With the help of a high-isolation dual-polarized antenna as a sampling probe, the main polarization and cross-polarization lobe pattern tests of the antenna array can be completed simultaneously within one test cycle, avoiding the error caused by the rotating sampling probe during the multi-polarization test of the radar antenna and improving the test efficiency. At present, there is still a need to improve the directional pattern test method of the multi-polarized antenna array.

[0004] References

[0005] 【1】Yu Wei, A satellite-borne fully polarized broadband phased array antenna, CN113659352A

[0006] 【2】Wu Jianjun, A dual-band multi-polarization coaxial waveguide slot antenna, CN110867644B

[0007] 【3】Wang Yang, Research on cooperative detection mode of dual-band active phased array radar system, Modern Radar, 2020.3

[0008] 【4】Ming Zhangjian, A test method for beam scanning characteristics of passive array antenna, CN112505434A

[0009] 【5】Chen Jin, Design of dual-polarization multi-task planar near-field test system, Electronic Measurement, 2022.11 Summary of the Invention

[0010] In order to solve the existing technical problems, the present invention provides a dual-frequency dual-polarization antenna array automatic test system, which includes a main control computer, a timing generator, a beam controller, a vector network analyzer, a radio frequency transceiver module, a power meter, a primary power supply, a power-on / off enable module and a dual-frequency dual-polarization antenna array; the main control computer is connected to the timing generator, the power-on / off enable module, the vector network analyzer, the primary power supply and the power meter through a network cable; the dual-frequency dual-polarization antenna array includes an L-band H-polarization transceiver main port, an L-band V-polarization transceiver main port, an L-band calibration main port, and a A Ku-band H-polarization transceiver port, a Ku-band V-polarization transceiver port, and a Ku-band calibration port are provided. Each frequency band's transceiver port is connected to the RF transceiver module using RF cables of equal amplitude and phase. The dual-frequency dual-polarization antenna array includes an L-band secondary power supply and a Ku-band secondary power supply. Each secondary power supply is connected to the primary power supply and the power-on / off enabling module via a power supply cable. The RF transceiver module is connected to the vector network analyzer using an RF cable. The timing generator is connected to the beam controller, the RF transceiver module, and the vector network analyzer respectively using control cables.

[0011] The main control computer sends parameter setting instructions to the vector network analyzer through the network port and reads the collected data from the vector network analyzer in real time, sends test and telemetry instructions to the timing generator, collects power data from the power meter, and collects working current data from the primary power supply.

[0012] Furthermore, the timing generator receives the test instructions sent by the main control computer, generates wave control codes, timing signals, channel switching signals, and acquisition trigger signals, and sends them to the beam controller, RF transceiver module, and vector network analyzer respectively; the beam controller receives the wave control codes and timing signals sent by the timing generator, and forwards them to the antenna array.

[0013] Furthermore, the RF transceiver module receives the timing signal and channel switching signal generated by the timing generator, and selects the L-band transceiver channel to work or the Ku-band transceiver channel to work; the main interface LH_Z, LV_Z, KH_Z, KV_Z and calibration interface LHV_C1, KHV_C1 of the RF transceiver module are connected to the antenna array through RF cables, the P1 and P2 interfaces are connected to the vector network analyzer, and the P3 interface is connected to the power meter;

[0014] Furthermore, the RF transceiver module and the antenna array use the same TR1 timing signal, and the TR3 timing signal of the RF transceiver module is nested inside the TR2 timing signal of the antenna array, where the TR1 timing signal is the transceiver switch signal, and the TR2 and TR3 timing signals are the transmission modulation signals.

[0015] Furthermore, the RF transceiver module includes a ring isolation component, a power amplifier, a low-noise amplifier, a 2-to-1 switch, and a 1:2 power divider. The ring isolation component realizes the separation of the transceiver link, the power amplifier realizes the power amplification of the transmission link, and the low-noise amplifier receives the gain compensation of the link. The 2-to-1 switches S1 and S2 are controlled by the TR1 timing signal to select the receiving channel or the transmitting channel. The 2-to-1 switches S3, S4, and S5 are controlled by the command signal to select the L channel or the Ku channel.

[0016] Furthermore, the transmission timing sequence of the antenna array and the RF transceiver module is: the TR1 timing signal is closed 1us earlier than the TR2 timing signal, and is opened 1us later than the TR2 timing signal; the RF transceiver module TR3 timing signal is opened 0.5us later than the array TR2 timing signal, and is closed 0.5us earlier than the array TR2 timing signal.

[0017] Furthermore, the vector network analyzer receives parameter setting instructions sent by the main control computer and performs data acquisition according to the acquisition trigger signal sent by the timing generator; the power-on and power-off enabling module receives the power-on and power-off instructions from the main control computer and powers on or off the antenna array according to the preset power-on and power-off timing. When the power-on and power-off enabling module is powered on, the receiving power is added first and then the transmitting power; when the power-off enabling module is powered off, the transmitting power is cut off first and then the receiving power.

[0018] Furthermore, the launch test process of the system includes the following steps:

[0019] (1) The vector network analyzer calls the emission test calibration file;

[0020] (2) The power-on / off enabling module sends a power-on command to the antenna array, first turning on the receiving power and then the transmitting power;

[0021] (3) The timing generator sends a channel selection instruction to the RF transceiver module, which selects the RF transceiver module to the transmission channel of the corresponding frequency band and polarization;

[0022] (4) The timing generator sends the beam control code and TR1 and TR2 timing signals to the antenna array through the beam controller, and sends TR1 and TR3 timing signals to the RF transceiver module;

[0023] (5) The timing generator sends a trigger signal to the vector network analyzer, and the vector network analyzer performs frequency sampling after receiving the trigger signal. ~ Data collection, is the low frequency point of the measured frequency band, is the high frequency point of the measured frequency band;

[0024] (6) After data acquisition is completed, the main control computer reads the data collected by the vector network analyzer and stores it in the computer memory;

[0025] (7) Repeat steps (4) to (6) to complete the transmission channel data of the current polarization antenna in the current frequency band;

[0026] (8) Repeat steps (1) to (7) to complete the transmission channel data of the dual-frequency dual-polarization antenna array.

[0027] Furthermore, the system's reception test process includes the following steps:

[0028] (1) The vector network analyzer calls the received test calibration file;

[0029] (2) The power-on / off enabling module sends a power-on / receive command to the antenna array;

[0030] (3) The timing generator sends a channel selection instruction to the RF transceiver module, which selects the RF transceiver module to the receiving channel of the corresponding frequency band and polarization;

[0031] (4) The timing generator sends the beam control code and TR1 timing signal to the antenna array through the beam controller, and sends the TR1 timing signal to the RF transceiver module;

[0032] (5) Vector network analyzer uses internal triggering to perform frequency analysis ~ After the data collection is completed, the main control computer reads the data collected by the vector network analyzer and stores it in the computer memory;

[0033] (6) Repeat steps (4) to (5) to complete the receiving channel data of the current polarization antenna in the current frequency band;

[0034] (7) Repeat steps (1) to (6) to complete the receiving channel data of the dual-frequency dual-polarization antenna array.

[0035] The dual-frequency dual-polarization antenna array automatic test system of the present invention has the characteristics of automatic selection of working frequency band and polarization channel, automatic switching of transmitting and receiving links, real-time monitoring of working current and working temperature, and real-time monitoring of transmission calibration power. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further explained below with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the automatic testing system of the present invention.

[0038] Figure 2 This is a schematic diagram of the radio frequency transceiver module in the automatic test system of the present invention.

[0039] Figure 3 This is a timing sequence diagram of the automatic test system of the present invention.

[0040] Figure 4 This is the test data of the phase shift accuracy received by the L-band H-polarized antenna of the automatic test system of the present invention.

[0041] Figure 5 This is the test data of the attenuation accuracy of the L-band H-polarized antenna received by the automatic test system of the present invention.

[0042] Figure 6 This is the test data of the phase shift accuracy received by the Ku-band V-polarized antenna of the automatic test system of the present invention.

[0043] Figure 7 This is the test data of the Ku-band V-polarized antenna receiving attenuation accuracy of the automatic test system of the present invention. DETAILED DESCRIPTION

[0044] Combine Figure 1-Figure 7 The dual-frequency dual-polarization antenna array automatic test system of the present invention includes a main control computer, a timing generator, a beam controller, a vector network analyzer, a radio frequency transceiver module, a power meter, a primary power supply, a power-on / off enable module, and a dual-frequency dual-polarization antenna array.

[0045] The main control computer sends parameter setting instructions to the vector network analyzer through the network port and reads the collected data from the vector network analyzer in real time, sends test and telemetry instructions to the timing generator, collects power data from the power meter, and collects working current data from the primary power supply.

[0046] The timing generator is used to receive the test instructions sent by the main control computer, generate wave control codes, timing signals, channel switching signals and acquisition trigger signals, and send them to the beam controller, RF transceiver module and vector network analyzer respectively.

[0047] The beam controller receives the beam control code and timing signal sent by the timing generator and forwards them to the antenna array.

[0048] The RF transceiver module receives the timing signal and channel switching signal generated by the timing generator, and selects the L-band transceiver channel to work or the Ku-band transceiver channel to work, as shown in the attached figure. Figure 2As shown in the figure, the RF transceiver module's main interface LH_Z / LV_Z / KH_Z / KV_Z and calibration interface LHV_C1 / KHV_C1 are connected to the antenna array via RF cables. Interfaces P1 and P2 are connected to a vector network analyzer, and interface P3 is connected to a power meter. The RF transceiver module internally includes a ring spacer assembly, a power amplifier, a low-noise amplifier, a 2-to-1 switch, and a 1:2 power divider. The ring spacer assembly is used to separate the transmit and receive links. The power amplifier is used for power amplification in the transmit link, and the low-noise amplifier is used for gain compensation in the receive link. The 2-to-1 switches S1 and S2 are controlled by the TR1 timing signal to select either the receive or transmit channel. S3, S4, and S5 are controlled by a command signal to select either the L channel or the Ku channel.

[0049] During system transmission, the RF signal is amplified by the transceiver module and sent to the L-band H / V polarization ports (LH_Z / LV_Z) and Ku-band H / V polarization ports (KH_Z / KV_Z) of the antenna array. The calibration path received signal returns to the RF transceiver module and is split into two paths: one path is sent to a vector network analyzer for data acquisition (P2), and the other path is sent to a power meter for power monitoring (P3). During system reception, the RF signal is sent to the L-band calibration port (LHV_C1) and Ku-band calibration port (KHV_C1) of the antenna array through the transceiver module. The main path received signal undergoes low-noise amplification by the RF transceiver module and is sent to a vector network analyzer for data acquisition (P1). To ensure that the antenna array and the RF transceiver module work synchronously, the RF transceiver module and the antenna array use the same TR1 timing, and the TR3 signal of the RF transceiver module is nested inside the TR2 signal of the antenna array. TR1 is the transceiver switch signal, and TR2 and TR3 are the transmit modulation signals.

[0050] The vector network analyzer is used to receive parameter setting instructions sent by the host computer and perform data acquisition according to the acquisition trigger signal sent by the timing generator.

[0051] The power-on / off enabling module receives power-on / off commands from the main control computer and controls the power output of the secondary power supply of the dual-frequency dual-polarization antenna array. When the power-on / off enabling module is powered on, the receiving power is first applied and then the transmitting power is applied; when the power-on / off enabling module is powered off, the transmitting power is first applied and then the receiving power is removed.

[0052] The timing relationship between the antenna array and the RF transceiver module is shown in the attached figure. Figure 3 To ensure the normal operation of the antenna array's transceiver link, the TR1 timing signal must be turned off 1us earlier than the TR2 timing signal and turned on 1us later than the TR2 timing signal. To protect the antenna array's power amplifier components, the RF transceiver module's TR3 timing signal must be turned on 0.5us later than the array's TR2 timing signal and turned off 0.5us earlier than the array's TR2 timing signal.

[0053] The launch test process includes the following steps:

[0054] 1) The vector network analyzer calls the emission test calibration file;

[0055] 2) The power-on / off enabling module sends a power-on command to the antenna array, first turning on the receiving power and then the transmitting power;

[0056] 3) The timing generator sends a channel selection instruction to the RF transceiver module, which selects the transmission channel of the corresponding frequency band and polarization;

[0057] 4) The timing generator sends the beam control code and TR1 and TR2 timing signals to the antenna array through the beam controller, and sends TR1 and TR3 timing signals to the RF transceiver module;

[0058] 5) The timing generator sends a trigger signal to the vector network analyzer, and the vector network analyzer performs frequency analysis after receiving the trigger signal. ~ Data collection, is the low frequency point of the measured frequency band, is the high frequency point of the measured frequency band;

[0059] 6) After data acquisition is completed, the main control computer reads the data collected by the vector network analyzer and stores it in the computer memory;

[0060] 7) Repeat steps 4) to 6) to complete the transmission channel data of the current polarization antenna in the current frequency band;

[0061] 8) Repeat steps 1) to 7) to complete the transmission channel data of the dual-frequency dual-polarization antenna array.

[0062] The acceptance testing process includes the following steps:

[0063] 1) The vector network analyzer calls the received test calibration file;

[0064] 2) The power-on / off enabling module sends a power-on / receive command to the antenna array;

[0065] 3) The timing generator sends a channel selection instruction to the RF transceiver module, which selects the receiving channel of the corresponding frequency band and polarization;

[0066] 4) The timing generator sends the beam control code and TR1 timing signal to the antenna array through the beam controller, and sends the TR1 timing signal to the RF transceiver module;

[0067] 5) Vector network analyzer uses internal triggering to detect frequency points ~ After the data collection is completed, the main control computer reads the data collected by the vector network analyzer and stores it in the computer memory;

[0068] 6) Repeat steps 4) to 5) to complete the traversal of the receiving channel data of the current polarization antenna in the current frequency band;

[0069] 7) Repeat steps 1) to 6) to complete the receiving channel data of the dual-frequency dual-polarization antenna array.

[0070] Attachment Figure 4 and attached Figure 5 They are the test curves of L-band receiving phase shift accuracy and attenuation accuracy, attached Figure 6 and attached Figure 7 These are the test curves of Ku-band receiving phase shift accuracy and attenuation accuracy respectively.

[0071] In the long-term and repeated testing of the product, the typical process in one test is as follows:

[0072] 1. L and Ku array temperature telemetry and voltage telemetry;

[0073] 2. During the full-transmission test of the L and Ku arrays, the main control computer collects the power value from the power meter and the current value from the primary power supply;

[0074] 3. Test the L and Ku arrays with full reception, and use a vector network analyzer to record amplitude and phase curves;

[0075] 4. L-array receiving phase shift, receiving attenuation, and transmitting phase shift test;

[0076] 5. Ku array receiving phase shift, receiving attenuation, and transmitting phase shift test;

[0077] 6.L and Ku array temperature telemetry and voltage telemetry.

[0078] The test system of the present invention has the functions of automatic selection of working frequency band and polarization channel, and automatic switching of transceiver link, which realizes the automatic testing of calibration performance within the dual-frequency dual-polarization antenna array. During the long-term environmental testing of the product, it avoids the impact of manual replacement of the radio frequency link on the test accuracy, and ensures the consistency of the test link and the repeatability of the test data between each electrical test of the product. It has the functions of real-time monitoring of working current and working temperature, and real-time monitoring of transmission calibration power, which can timely detect and record array abnormalities and assist in making accurate assessments of product status. Combined with the timing test and log recording functions of the main control computer, it can realize automated testing of the product, significantly saving manpower and time costs.

[0079] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A dual-frequency dual-polarization antenna array automatic test system, characterized by: The invention comprises a main control computer, a timing generator, a beam controller, a vector network analyzer, a radio frequency transceiver module, a power meter, a primary power supply, a power-on / off enable module and a dual-frequency dual-polarization antenna array; the main control computer is connected to the timing generator, the power-on / off enable module, the vector network analyzer, the primary power supply and the power meter respectively through network cables; the dual-frequency dual-polarization antenna array comprises an L-band H-polarization transceiver main port, an L-band V-polarization transceiver main port, an L-band calibration main port, a Ku-band H-polarization transceiver main port, a Ku-band V-polarization transceiver main port and a Ku-band calibration main port, and the transceiver main port of each frequency band is connected to the radio frequency transceiver module using a radio frequency cable with equal amplitude and phase; the dual-frequency dual-polarization antenna array comprises an L-band secondary power supply and a Ku-band secondary power supply, and each secondary power supply is connected to the primary power supply and the power-on / off enable module through a power supply cable; The radio frequency transceiver module is connected to the vector network analyzer using a radio frequency cable; the timing generator is connected to the beam controller, the radio frequency transceiver module, and the vector network analyzer respectively using a control cable.

2. The dual-frequency dual-polarization antenna array automatic testing system according to claim 1, characterized in that: The main control computer sends parameter setting instructions to the vector network analyzer through the network port and reads the collected data from the vector network analyzer in real time, sends test and telemetry instructions to the timing generator, collects power data from the power meter, and collects working current data from the primary power supply.

3. The dual-frequency dual-polarization antenna array automatic testing system according to claim 1, characterized in that: The timing generator receives the test instructions sent by the main control computer, generates wave control codes, timing signals, channel switching signals, and acquisition trigger signals, and sends them to the beam controller, RF transceiver module, and vector network analyzer respectively; the beam controller receives the wave control codes and timing signals sent by the timing generator and forwards them to the antenna array.

4. The dual-frequency dual-polarization antenna array automatic testing system according to claim 1, characterized in that: The RF transceiver module receives the timing signal and channel switching signal generated by the timing generator, and selects the L-band transceiver channel or the Ku-band transceiver channel to work; the main interface LH_Z, LV_Z, KH_Z, KV_Z and calibration interface LHV_C1, KHV_C1 of the RF transceiver module are connected to the antenna array through RF cables, the P1 and P2 interfaces are connected to the vector network analyzer, and the P3 interface is connected to the power meter.

5. The dual-frequency dual-polarization antenna array automatic testing system according to claim 1, characterized in that: The RF transceiver module and the antenna array use the same TR1 timing. The TR3 signal of the RF transceiver module is nested inside the TR2 signal of the antenna array. TR1 is the transceiver switch signal, and TR2 and TR3 are the transmit modulation signals.

6. The dual-frequency dual-polarization antenna array automatic testing system according to claim 5, characterized in that: The RF transceiver module includes a ring spacer component, a power amplifier, a low-noise amplifier, a 2-to-1 switch, and a 1:2 power splitter. The ring spacer component realizes the separation of the transceiver link, the power amplifier realizes the power amplification of the transmission link, and the low-noise amplifier receives the gain compensation of the link. The 2-to-1 switches S1 and S2 are controlled by the TR1 timing signal to select the receiving channel or the transmitting channel. The 2-to-1 switches S3, S4, and S5 are controlled by the command signal to select the L channel or the Ku channel.

7. The dual-frequency dual-polarization antenna array automatic testing system according to claim 6, characterized in that: The transmission timing sequence of the antenna array and the RF transceiver module is as follows: the TR1 timing signal is closed 1us earlier than the TR2 timing signal, and is opened 1us later than the TR2 timing signal; the TR3 timing signal of the RF transceiver module is opened 0.5us later than the array TR2 timing signal, and is closed 0.5us earlier than the array TR2 timing signal.

8. The dual-frequency dual-polarization antenna array automatic testing system according to claim 1, characterized in that: The vector network analyzer receives parameter setting instructions sent by the main control computer and performs data acquisition according to the acquisition trigger signal sent by the timing generator; the power-on and power-off enable module receives the power-on and power-off instructions from the main control computer and powers on or off the antenna array according to the preset power-on and power-off timing. When the power-on and power-off enable module is powered on, the receiving power is added first and then the transmitting power; when the power-off enable module is powered off, the transmitting power is cut off first and then the receiving power.

9. The dual-frequency dual-polarization antenna array automatic testing system according to claim 1, characterized in that: The system's launch test process includes the following steps: (1) The vector network analyzer calls the emission test calibration file; (2) The power-on / off enabling module sends a power-on command to the antenna array, first turning on the receiving power and then the transmitting power; (3) The timing generator sends a channel selection instruction to the RF transceiver module, which selects the RF transceiver module to the transmission channel of the corresponding frequency band and polarization; (4) The timing generator sends the beam control code and TR1 and TR2 timing signals to the antenna array through the beam controller, and sends TR1 and TR3 timing signals to the RF transceiver module; (5) The timing generator sends a trigger signal to the vector network analyzer, and the vector network analyzer performs frequency sampling after receiving the trigger signal. ~ Data collection, is the low frequency point of the measured frequency band, is the high frequency point of the measured frequency band; (6) After data acquisition is completed, the main control computer reads the data collected by the vector network analyzer and stores it in the computer memory; (7) Repeat steps (4) to (6) to complete the transmission channel data of the current polarization antenna in the current frequency band; (8) Repeat steps (1) to (7) to complete the transmission channel data of the dual-frequency dual-polarization antenna array.

10. The dual-frequency dual-polarization antenna array automatic testing system according to claim 1, characterized in that: The acceptance testing process includes the following steps: (1) The vector network analyzer calls the received test calibration file; (2) The power-on / off enabling module sends a power-on / receive command to the antenna array; (3) The timing generator sends a channel selection instruction to the RF transceiver module, which selects the RF transceiver module to the receiving channel of the corresponding frequency band and polarization; (4) The timing generator sends the beam control code and TR1 timing signal to the antenna array through the beam controller, and sends the TR1 timing signal to the RF transceiver module; (5) Vector network analyzer uses internal triggering to perform frequency analysis ~ After the data collection is completed, the main control computer reads the data collected by the vector network analyzer and stores it in the computer memory; (6) Repeat steps (4) to (5) to complete the receiving channel data of the current polarization antenna in the current frequency band; (7) Repeat steps (1) to (6) to complete the receiving channel data of the dual-frequency dual-polarization antenna array.

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