Beidou navigation antenna and communication antenna feed source phase center detection method

Abstract

The invention discloses a Beidou navigation antenna and communication antenna feed source phase center detection method, and belongs to the technical field of satellite navigation and communication. The method specifically comprises the following steps: S1, connecting a transmitting antenna, a transmitting turntable, a vector network analyzer, a computer, a printer, an antenna turntable and a to-be-tested antenna in a microwave darkroom; and S2, debugging the to-be-measured antenna and the transmitting antenna through the laser beam to ensure the consistency of the measurement reference. The six surfaces of the anechoic chamber are covered with shielding materials and wave absorbing materials, so that external electromagnetic wave interference can be effectively isolated, a non-reflection and low-interference detection environment is created, phase measurement data distortion caused by external electromagnetic signal coupling is avoided, and it is ensured that a detection result truly reflects the characteristics of the antenna; parameters such as the silent area size, humidity, temperature and atmospheric pressure of the microwave anechoic chamber are strictly limited, the influence of environment temperature and humidity on the electrical performance of the antenna is reduced, and the consistency of detection conditions is ensured.

Description

Technical Field

[0001] The present invention relates to the field of satellite navigation and communication technology, and in particular to a method for detecting the phase center of a Beidou navigation antenna and a communication antenna feed source. Background Art

[0002] The antenna phase center refers to the center of the equivalent spherical wave source when radiating or receiving electromagnetic waves. The observation quantity obtained through high-precision measurement of satellite navigation is based on the antenna phase center. Its position directly affects the symmetry of the antenna's radiation pattern and the signal transmission efficiency. The feed phase center should coincide with the focus of the antenna's geometric reflection surface to eliminate signal distortion and gain loss. Phase center offset will lead to beam pointing deviation, decreased polarization purity and increased sidelobe level, significantly reducing the stability of the communication link. In positioning measurements, the antenna reference point is used as the reference when measuring antenna height. The antenna phase center is a key parameter that affects the accuracy of navigation and communication signal transmission. The accuracy and reliability of the measurement can be improved by accurately determining the position of the antenna phase center. The existing detection methods are affected by environmental factors that interfere with detection stability and test results. Summary of the Invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a method for detecting the phase center of the Beidou navigation antenna and communication antenna feed; it can solve the problem in the existing detection method that the detection stability and detection results are affected by environmental factors.

[0004] Technical solution: To solve the above technical problems, according to one aspect of the present invention, more specifically, a method for detecting the phase center of a Beidou navigation antenna and a communication antenna feed source comprises the following steps: S1. Connect the transmitting antenna, transmitting turntable, vector network analyzer, computer, printer, antenna turntable and antenna to be tested in a microwave darkroom; S2. Use laser beam to debug the antenna to be tested and the transmitting antenna to ensure the consistency of the measurement benchmark; S3. Use the automatic test software on the computer to set the test frequency, transmission level, antenna polarization, turntable speed, rotation angle and real-time display format; S4. Define 0°, +90°, and -90° displayed on the antenna turntable display device; S5. Use the antenna test software to set the vector network analyzer to phase measurement and control the antenna turntable to rotate clockwise from -90° to +90°. S6. According to the shape of the phase test curve displayed on the computer screen, determine the adjustment direction and distance of the antenna to be tested, and adjust until the phase curve reaches the ideal state; S7. Collect relevant operation data of direction and distance adjustment by different operators using the same microwave darkroom, pre-process and analyze the collected data to obtain a comprehensive operation feedback index, and determine whether to continue operation or repair the detection equipment based on the comprehensive operation feedback index; S8. Rotate the antenna under test 90° around its polarization axis and repeat steps S4 to S6. The point where the antenna under test and the rotation center of the antenna turntable coincide with each other is the phase center of the antenna under test. S9. The antenna test software automatically displays the distance of the tested antenna from the phase center, and calculates the specific position of the tested antenna's phase center in the wireless geometry based on the distances of the three components displayed.

[0005] Furthermore, in step S1, the six sides of the microwave darkroom are covered with shielding materials and absorbing materials, the quiet zone is not less than 0.5m×0.5m×0.5m, the humidity is 45%-75%, the temperature is 15°C-35°C, the atmospheric pressure is 86.0kPa-101.30kPa, there is no electromagnetic wave interference, and the far-field conditions are met: 、 Where R is the distance between the antenna under test and the transmitting antenna, D is the maximum size of the antenna under test, and d is the maximum size of the transmitting antenna. is the wavelength; Vector network analyzer accuracy requirements: amplitude ≤ 0.5dB, phase ≤ 3°; The antenna turntable is a five-axis turntable with a display resolution of 0.01°, position accuracy of 0.1° for both pitch and vertical directions, rotation speed of 1° / s to 10° / s for azimuth and 1° / s to 4° / s for pitch, and X / Y displacement accuracy of 0.1mm and resolution of 0.01mm. Launch turntable: 360° rotation, up and down movement; Transmitting antenna: Key parameters have been calibrated in the laboratory and come with a calibration certificate.

[0006] Furthermore, the specific operation steps of step S2 are: S21, matching the polarization of the transmitting antenna with the polarization of the antenna to be tested; S22. Preheat all equipment; S23. Install the antenna to be tested on the antenna turntable, with the geometric center of the antenna to be tested coinciding with the rotation center of the antenna turntable. The transmitting antenna and the antenna to be tested are at the same height and aligned axially. Use the laser beam as a reference line. Detect the offset of the target position through emission, transmission, or interference of the laser beam. Coincidentally align the laser beam with the device coordinate system to ensure that the measurement reference is consistent.

[0007] Furthermore, in said S4, when the transmitting antenna is axially aligned with the antenna to be tested, the antenna turntable display device displays 0°, and the antenna turntable rotated 90° clockwise from 0° is defined as +90°, and the antenna turntable rotated 90° counterclockwise from 0° is defined as -90°.

[0008] Furthermore, step S7 includes the following specific steps: S71. Collecting operation data related to direction and distance adjustment by different operators using the same microwave anechoic chamber to obtain first data, including: duration of each adjustment for each operation in the microwave anechoic chamber, and number of adjustments made by each operator in the microwave anechoic chamber; S72. Eliminate relevant operation data in the first data that have not been adjusted to the ideal state of the phase curve to obtain second data, including: the adjustment time each operator takes to adjust the phase curve to the ideal state in the microwave darkroom each time, and the number of adjustments each operator makes to adjust the phase curve to the ideal state in the microwave darkroom each time; S73. Analyze and process the second data of each operator to obtain a current operation feedback index of each operator in the microwave anechoic chamber. If the increase in the current operation feedback index compared to the average of the operator's previous operation feedback indexes in the microwave anechoic chamber is lower than the upper limit of the increase in the operation feedback index, continue testing. Otherwise, suspend phase center testing and perform maintenance on the testing equipment. Continue testing after the testing equipment is fully operational. S74. Process the most recent operation feedback index of each operator in this microwave darkroom to obtain a comprehensive operation feedback index. When the comprehensive operation feedback index is lower than the comprehensive operation feedback index threshold, continue the test. Otherwise, suspend the phase center test and perform maintenance on the test equipment. Perform the test again after the test equipment is completely normal.

[0009] Furthermore, in step S73, when analyzing and processing the second data of each operator to obtain the operation feedback index of each operator: 、 in, For each operator in this microwave darkroom operation feedback index, The operator takes time to adjust the phase curve to the ideal state in this microwave darkroom. is the adjustment time for the operator to adjust the phase curve to the ideal state in this microwave darkroom each time, n is the number of times the operator adjusts the phase curve to the ideal state in this microwave darkroom, DN is the number of times the operator adjusts the phase curve to the ideal state in this microwave darkroom this time, The minimum number of adjustments required by the operator in this microwave darkroom until the phase curve reaches the ideal state. The maximum number of times the operator adjusts the phase curve in this microwave darkroom until it reaches the ideal state.

[0010] Furthermore, in step S73, the upper limit of the increase of the operation feedback index is set and adjusted according to the needs during the actual operation.

[0011] Furthermore, in step S74, when the comprehensive operation feedback index is obtained by processing the most recent operation feedback index of each operator in the microwave darkroom: 、 in, is the comprehensive operation feedback index, The number of times each operator adjusts the phase curve to the ideal state in this microwave darkroom, The number of times all operators adjusted the phase curve to the ideal state in this microwave darkroom. The most recent operation feedback index for each operator.

[0012] Furthermore, in step S74, the comprehensive operation feedback index threshold is set and adjusted according to the needs during the actual operation. Beneficial effects

[0013] 1. The six sides of the microwave anechoic chamber are covered with shielding and absorbing materials, which can effectively isolate external electromagnetic interference and create a reflection-free, low-interference detection environment. This avoids distortion of phase measurement data due to coupling of external electromagnetic signals, ensuring that the test results truly reflect the characteristics of the antenna itself. The quiet zone size, humidity, temperature, atmospheric pressure and other parameters of the microwave anechoic chamber are strictly limited to reduce the impact of slowly changing factors such as ambient temperature and humidity on the electrical performance of the antenna, ensuring the consistency of the test conditions. The formula is used to ensure that the distance between the antenna under test and the transmitting antenna meets the far-field test conditions, making the incident wave approximately a plane wave, avoiding interference with the test results caused by the complexity of the near-field phase distribution, and ensuring the accuracy of the phase measurement.

[0014] 2. Maximize signal transmission efficiency by matching the polarization of the transmitting antenna with the antenna under test. Using a laser beam as a reference line, detect target position offsets through emission, transmission, or interference. Align the laser beam with the device coordinate system to achieve high-precision alignment of the geometric center of the antenna under test with the rotation center of the antenna turntable and the axial direction of the transmitting antenna. This eliminates measurement errors introduced by mechanical installation deviations and ensures consistency in the test benchmark. Preheat all equipment to ensure that the internal components of electronic equipment, such as the vector network analyzer and turntable, reach a thermally stable state. This avoids measurement fluctuations caused by parameter drift during initial startup and further improves test accuracy.

[0015] 3. Automated test software allows you to set parameters such as test frequency, transmission level, and turntable speed, and displays the phase curve in real time, reducing parameter setting errors and reading deviations caused by manual operation. Axial alignment between the transmitting antenna and the antenna under test is defined as 0°, while 90° clockwise and counterclockwise rotations are defined as +90° and -90°, respectively. This unified angle reference prevents directional errors caused by operator misunderstandings of the "zero position," improving the standardization of the testing process.

[0016] 4. By collecting data such as the adjustment time and number of adjustments from different operators, invalid operations that do not reach the ideal state are eliminated, and only successful adjustment data are analyzed to establish an operation feedback index model. The relationship between the single adjustment time and the historical average time, and the number of adjustments this time and the historical extreme value is comprehensively considered to quantify the operator's operating efficiency. If the current operation feedback index increase exceeds the preset upper limit, it indicates that the equipment may have a hidden fault and needs to be repaired before retesting to avoid invalidation of the test results due to deterioration of equipment performance. A comprehensive evaluation index is formed by weighted averaging the most recent operation feedback index of each operator. When the comprehensive operation index exceeds the threshold, it indicates that multiple operators have abnormal operation trends, which may be caused by the deterioration of the microwave darkroom environment or a systemic failure of the equipment. It is necessary to suspend the test and conduct a comprehensive overhaul to achieve dynamic monitoring of the overall status of the detection system and prevent the occurrence of batch detection errors.

[0017] 5. By rotating the antenna under test 90° around its polarization axis and repeating the test process, the ideal overlap point of the phase curve after two rotations is used to precisely determine the coincidence position of the antenna phase center and the turntable's rotation center. This avoids misjudgment of phase center offsets caused by antenna polarization orthogonality deviations during single-direction testing, enabling accurate calculation of the three-dimensional phase center. The antenna test software automatically displays the distance the antenna under test deviates from the phase center and calculates the specific phase center position based on the wireless geometry model. This provides quantitative data support for antenna design optimization, helps improve the symmetry of the antenna radiation pattern, and reduces sidelobe levels, thereby enhancing satellite navigation positioning accuracy and communication link stability.

[0018] 6. The accuracy requirements of the vector network analyzer ensure the accuracy of RF signal amplitude and phase measurements. The accuracy requirements of the five-axis turntable must meet the needs of submillimeter position adjustment and arc-second angle control, providing hardware support for the detection of small phase changes. The transmitting antenna must be calibrated in the laboratory and accompanied by a certificate to ensure the traceability and reliability of its radiation characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a flow chart of the method. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0021] Step 1: Connect the transmitting antenna, transmitting turntable, vector network analyzer, computer, printer, antenna turntable, and antenna under test in a microwave anechoic chamber. The six sides of the microwave anechoic chamber should be covered with shielding and absorbing materials. The quiet zone should be no less than 0.5m×0.5m×0.5m and meet the far-field conditions: 、 Where R is the distance between the antenna under test and the transmitting antenna, D is the maximum size of the antenna under test, and d is the maximum size of the transmitting antenna. is the wavelength; Vector network analyzer accuracy requirements: amplitude ≤ 0.5dB, phase ≤ 3°, to ensure the accuracy of RF signal amplitude and phase measurement; The antenna turntable is a five-axis turntable with a display resolution of 0.01°, position accuracy of 0.1° in both pitch and vertical directions, rotation speed of 1° / s to 10° / s in azimuth and 1° / s to 4° / s in pitch, and X / Y displacement accuracy of 0.1mm and a resolution of 0.01mm. This meets the requirements of submillimeter position adjustment and arc-second angle control, providing hardware support for detecting tiny phase changes. Launch turntable: 360° rotation, up and down movement; Transmitting antenna: Key parameters have been calibrated in the laboratory and are accompanied by a calibration certificate to ensure the traceability and reliability of its radiation characteristics.

[0022] The six sides of the microwave anechoic chamber are covered with shielding and absorbing materials, which can effectively isolate external electromagnetic interference, create a reflection-free, low-interference detection environment, avoid distortion of phase measurement data due to coupling of external electromagnetic signals, and ensure that the test results truly reflect the characteristics of the antenna itself. The quiet zone size, humidity, temperature, atmospheric pressure and other parameters of the microwave anechoic chamber are strictly limited to reduce the impact of slowly changing factors such as ambient temperature and humidity on the electrical performance of the antenna, ensure the consistency of the test conditions, and use formulas to ensure that the distance between the antenna under test and the transmitting antenna meets the far-field test conditions, so that the incident wave is approximated as a plane wave, avoiding the interference of the complexity of the near-field phase distribution on the test results, and ensuring the accuracy of the phase measurement.

[0023] The second step is to debug the antenna to be tested and the transmitting antenna using a laser beam to ensure that the measurement benchmark is consistent. The specific steps are as follows: match the polarization of the transmitting antenna with the polarization of the antenna to be tested, and ensure maximum signal transmission efficiency by matching the polarization of the transmitting antenna with the antenna to be tested; preheat all equipment to allow the internal components of electronic equipment such as the vector network analyzer and turntable to reach a thermally stable state, avoid measurement fluctuations caused by parameter drift during the initial equipment startup, and further improve detection accuracy; install the antenna to be tested on the antenna turntable, with the geometric center of the antenna to be tested coinciding with the rotation center of the antenna turntable, and the transmitting antenna and the antenna to be tested at the same height and aligned axially. Use the laser beam as a reference line to detect the offset of the target position by emission, transmission, or interference of the laser beam, and coincide the laser beam with the device coordinate system. Use the laser beam as a reference line to detect the offset of the target position by emission, transmission, or interference, and coincide the laser beam with the device coordinate system to achieve high-precision alignment of the geometric center of the antenna to be tested with the rotation center of the antenna turntable and the axial direction of the transmitting antenna, eliminating measurement errors introduced by mechanical installation deviations and ensuring consistent measurement benchmarks.

[0024] Step 3: Use the automatic test software on the computer to set the test frequency, transmission level, antenna polarization, turntable speed, rotation angle and real-time display format to reduce parameter setting errors and reading deviations caused by manual operation.

[0025] Step 4. Define 0°, +90°, and -90° displayed on the antenna turntable display. When the transmitting antenna and the antenna to be tested are axially aligned, the antenna turntable display shows 0°. The antenna turntable rotates 90° clockwise from 0° to +90°, and the antenna turntable rotates 90° counterclockwise from 0° to -90°. When the transmitting antenna and the antenna to be tested are axially aligned, it is defined as 0°. Rotating 90° clockwise and counterclockwise is defined as +90° and -90°, respectively. Unify the angle reference to avoid directional misjudgment due to different understandings of "zero position" among operators, and improve the standardization of the detection process.

[0026] Step 5. Use the antenna test software to set the vector network analyzer to phase measurement and control the antenna turntable to rotate clockwise from -90° to +90°.

[0027] Step 6. According to the shape of the phase test curve displayed on the computer screen, determine the adjustment direction and distance of the antenna to be tested, and adjust it until the phase curve reaches the ideal state.

[0028] Step 7: Collect relevant operation data of direction and distance adjustment by different operators using the same microwave darkroom. After preprocessing and analyzing the collected data, obtain the comprehensive operation feedback index. According to the comprehensive operation feedback index, decide whether to continue operation or repair the detection equipment. The specific steps are as follows: 1. Collecting operation data related to direction and distance adjustment by different operators using the same microwave darkroom to obtain first data, including: the duration of each adjustment for each operation in the microwave darkroom, and the number of adjustments made by each operator in the microwave darkroom; 2. Eliminating relevant operation data in which the phase curve is not adjusted to an ideal state from the first data to obtain second data, including: the adjustment time each operator takes to adjust the phase curve to an ideal state in the microwave darkroom each time, and the number of adjustments each operator makes to adjust the phase curve to an ideal state in the microwave darkroom each time; 3. Analyze and process the second data of each operator to obtain the current operation feedback index of each operator in this microwave anechoic chamber. If the increase in the current operation feedback index compared with the average value of the operator's previous operation feedback index in this microwave anechoic chamber is lower than the upper limit of the increase in the operation feedback index, continue the test. Otherwise, suspend the phase center test and perform maintenance on the test equipment. The test should be resumed after the test equipment is completely normal. The upper limit of the increase in the operation feedback index is set and adjusted according to the needs during the actual operation process.

[0029] 4. Each operator's most recent operation feedback index in the microwave anechoic chamber is processed to obtain a comprehensive operation feedback index. If the comprehensive operation feedback index is lower than the comprehensive operation feedback index threshold, testing continues. Otherwise, phase center testing is suspended and the testing equipment is repaired. Testing can be resumed only after the testing equipment is fully operational. The comprehensive operation feedback index threshold is set and adjusted according to actual operating needs.

[0030] When analyzing and processing the second data of each operator to obtain the operation feedback index of each operator: 、 in, For each operator in this microwave darkroom operation feedback index, The operation time recorded in real time is the adjustment time taken by the operator to adjust the phase curve to the ideal state in this microwave darkroom. The larger the value, the greater the operation feedback index. The adjustment time for the operator to adjust the phase curve to the ideal state in this microwave darkroom each time is used to calculate the historical average adjustment time, which serves as the benchmark for measuring the adjustment time. n is the number of times the operator adjusted the phase curve to the ideal state in this microwave darkroom. DN is the number of times the operator adjusted the phase curve to the ideal state in this microwave darkroom this time. The minimum number of adjustments required by the operator in this microwave darkroom until the phase curve reaches the ideal state. The maximum number of times the operator adjusts the phase curve in this microwave darkroom until it reaches the ideal state.

[0031] The results are mapped between 0 and 1 to avoid the influence of extreme values. The historical average adjustment time is used as a benchmark to reflect the long-term performance of the operator. Evaluate the stability of this adjustment number relative to historical extreme values, Tends to reward operations close to the minimum number of adjustments, standardization Range, introducing extreme values ​​can eliminate the influence of individual outliers. By combining time efficiency and frequency stability, the operator's single operation is dynamically quantified, balancing short-term performance and long-term historical data, avoiding the deviation of a single indicator, and standardizing the results to provide a unified dimension for subsequent comprehensive evaluation.

[0032] When the comprehensive operation feedback index is obtained by processing the most recent operation feedback index of each operator in this microwave darkroom: 、 in, is the comprehensive operation feedback index, The number of times each operator adjusts the phase curve to the ideal state in this microwave darkroom, The number of times all operators adjusted the phase curve to the ideal state in this microwave darkroom. The most recent operation feedback index for each operator. The weight is assigned by the ratio of the number of times each operator adjusts the phase curve to the ideal state in this microwave darkroom to the number of times all operators adjust the phase curve to the ideal state in this microwave darkroom. The more times an operator adjusts the phase curve to the ideal state in this microwave darkroom, the greater the impact on the overall state. The higher the weight of his operation feedback index, the higher the contribution to the comprehensive operation feedback index. The setting uses the most recent operation to better reflect the current state of the testing equipment and is more sensitive to anomalies. The Comprehensive Operation Feedback Index integrates the operation feedback of multiple people through a weighted average, focusing on the latest performance of high-frequency operators. This design can identify systemic risks, such as testing equipment failure, rather than accidental errors by individual operators. When the Comprehensive Operation Feedback Index exceeds the threshold, it indicates that multiple operators have experienced anomalies and testing needs to be suspended and the equipment needs to be checked.

[0033] Step 8. Rotate the antenna under test 90° around its polarization axis and repeat steps 4 to 6. The point where the antenna under test and the rotation center of the antenna turntable coincide is the phase center of the antenna under test. By rotating the antenna under test 90° around its polarization axis and repeating the test process, the ideal coincidence point of the phase curve after two rotations can be used to accurately determine the coincidence position of the antenna phase center and the turntable rotation center. This avoids misjudgment of the phase center offset caused by antenna polarization orthogonality deviation in one-way detection, and achieves accurate calculation of the three-dimensional phase center.

[0034] Step 9. The antenna test software automatically displays the distance that the antenna under test deviates from the phase center, and calculates the specific position of the phase center of the antenna under test in the wireless geometry based on the distances of the three components displayed. The antenna test software automatically displays the distance that the antenna under test deviates from the phase center, and calculates the specific position of the phase center based on the wireless geometry model, providing quantitative data support for antenna design optimization, helping to improve the symmetry of the antenna radiation pattern, reduce the sidelobe level, and thereby improve satellite navigation positioning accuracy and communication link stability.

[0035] Similarly, the phase centers of different frequencies can be detected through the above steps. Example

[0036] When calculating the operational feedback index, , then we have: 、 If the increase of 0.538 compared with the average value of the operator's previous operation feedback index in this microwave darkroom is lower than the upper limit of the increase of the operation feedback index, continue the test; otherwise, suspend the phase center test and perform maintenance on the test equipment. Continue the test after the test equipment is completely normal. Example

[0037] When calculating the comprehensive operation feedback index, , then we have: 、 If 0.626 is lower than the comprehensive operation feedback index threshold, continue the test. Otherwise, suspend the phase center test and perform maintenance on the test equipment. Continue the test after the test equipment is fully normal.

[0038] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for detecting the phase center of a BeiDou navigation antenna and a communication antenna feed source, characterized in that: The specific steps include: S1. Connect the transmitting antenna, transmitting turntable, vector network analyzer, computer, printer, antenna turntable and antenna to be tested in a microwave darkroom; S2. Use laser beam to debug the antenna to be tested and the transmitting antenna to ensure the consistency of the measurement benchmark; S3. Use the automatic test software on the computer to set the test frequency, transmission level, antenna polarization, turntable speed, rotation angle and real-time display format; S4. Define 0°, +90°, and -90° displayed on the antenna turntable display device; S5. Use the antenna test software to set the vector network analyzer to phase measurement and control the antenna turntable to rotate clockwise from -90° to +90°. S6. According to the shape of the phase test curve displayed on the computer screen, determine the adjustment direction and distance of the antenna to be tested, and adjust until the phase curve reaches the ideal state; S7. Collect relevant operation data of direction and distance adjustment by different operators using the same microwave darkroom, pre-process and analyze the collected data to obtain a comprehensive operation feedback index, and determine whether to continue operation or repair the detection equipment based on the comprehensive operation feedback index; S8. Rotate the antenna under test 90° around its polarization axis and repeat steps S4 to S6. The point where the antenna under test and the rotation center of the antenna turntable coincide with each other is the phase center of the antenna under test. S9. The antenna test software automatically displays the distance of the tested antenna from the phase center, and calculates the specific position of the tested antenna's phase center in the wireless geometry based on the distances of the three components displayed.

2. A BeiDou navigation antenna and communication antenna feed phase center detection method according to claim 1, characterized in that: In step S1, the six sides of the microwave darkroom are covered with shielding materials and absorbing materials, the quiet zone is not less than 0.5m×0.5m×0.5m, the humidity is 45%-75%, the temperature is 15°C-35°C, the atmospheric pressure is 86.0kPa-101.30kPa, there is no electromagnetic wave interference, and the far-field conditions are met: 、 Where R is the distance between the antenna under test and the transmitting antenna, D is the maximum size of the antenna under test, and d is the maximum size of the transmitting antenna. is the wavelength; Vector network analyzer accuracy requirements: amplitude ≤ 0.5dB, phase ≤ 3°; The antenna turntable is a five-axis turntable with a display resolution of 0.01°, position accuracy of 0.1° for both pitch and vertical directions, rotation speed of 1° / s to 10° / s for azimuth and 1° / s to 4° / s for pitch, and X / Y displacement accuracy of 0.1mm and resolution of 0.01mm. Launch turntable: 360° rotation, up and down movement; Transmitting antenna: Key parameters have been calibrated in the laboratory and come with a calibration certificate.

3. The method for detecting the phase center of a BeiDou navigation antenna and a communication antenna feed according to claim 1, wherein: The specific operation steps of step S2 are: S21, matching the polarization of the transmitting antenna with the polarization of the antenna to be tested; S22. Preheat all equipment; S23. Install the antenna to be tested on the antenna turntable, with the geometric center of the antenna to be tested coinciding with the rotation center of the antenna turntable. The transmitting antenna and the antenna to be tested are at the same height and aligned axially. Use the laser beam as a reference line. Detect the offset of the target position through emission, transmission, or interference of the laser beam. Coincidentally align the laser beam with the device coordinate system to ensure that the measurement reference is consistent.

4. The method for detecting the phase center of a BeiDou navigation antenna and a communication antenna feed according to claim 1, wherein: In the above S4, when the transmitting antenna is aligned axially with the antenna to be tested, the antenna turntable display device displays 0°, and the antenna turntable rotated 90° clockwise from 0° is defined as +90°, and the antenna turntable rotated 90° counterclockwise from 0° is defined as -90°.

5. The method for detecting the phase center of a BeiDou navigation antenna and a communication antenna feed according to claim 1, wherein: The step S7 includes the following specific steps: S71. Collecting operation data related to direction and distance adjustment by different operators using the same microwave anechoic chamber to obtain first data, including: duration of each adjustment for each operation in the microwave anechoic chamber, and number of adjustments made by each operator in the microwave anechoic chamber; S72. Eliminate relevant operation data in the first data that have not been adjusted to the ideal state of the phase curve to obtain second data, including: the adjustment time each operator takes to adjust the phase curve to the ideal state in the microwave darkroom each time, and the number of adjustments each operator makes to adjust the phase curve to the ideal state in the microwave darkroom each time; S73. Analyze and process the second data of each operator to obtain a current operation feedback index of each operator in the microwave anechoic chamber. If the increase in the current operation feedback index compared to the average of the operator's previous operation feedback indexes in the microwave anechoic chamber is lower than the upper limit of the increase in the operation feedback index, continue testing. Otherwise, suspend phase center testing and perform maintenance on the testing equipment. Continue testing after the testing equipment is fully operational. S74. Process the most recent operation feedback index of each operator in this microwave darkroom to obtain a comprehensive operation feedback index. When the comprehensive operation feedback index is lower than the comprehensive operation feedback index threshold, continue the test. Otherwise, suspend the phase center test and perform maintenance on the test equipment. Perform the test again after the test equipment is completely normal.

6. A BeiDou navigation antenna and communication antenna feed phase center detection method according to claim 5, characterized in that: In step S73, when analyzing and processing the second data of each operator to obtain the operation feedback index of each operator: 、 in, For each operator in this microwave darkroom operation feedback index, The operator takes time to adjust the phase curve to the ideal state in this microwave darkroom. is the adjustment time for the operator to adjust the phase curve to the ideal state in this microwave darkroom each time, n is the number of times the operator adjusts the phase curve to the ideal state in this microwave darkroom, DN is the number of times the operator adjusts the phase curve to the ideal state in this microwave darkroom this time, The minimum number of adjustments required by the operator in this microwave darkroom until the phase curve reaches the ideal state. The maximum number of times the operator adjusts the phase curve in this microwave darkroom until it reaches the ideal state.

7. The method for detecting the feed phase center of a Beidou navigation antenna and a communication antenna according to claim 5, wherein: In step S73, the upper limit of the increase of the operation feedback index is set and adjusted according to the needs during the actual operation.

8. The method for detecting the feed phase center of a BeiDou navigation antenna and a communication antenna according to claim 5, wherein: In step S74, when the comprehensive operation feedback index is obtained by processing the most recent operation feedback index of each operator in the microwave darkroom: 、 in, is the comprehensive operation feedback index, The number of times each operator adjusts the phase curve to the ideal state in this microwave darkroom, The number of times all operators adjusted the phase curve to the ideal state in this microwave darkroom. The most recent operation feedback index for each operator.

9. The method for detecting the phase center of a BeiDou navigation antenna and a communication antenna feed according to claim 5, wherein: In step S74, the comprehensive operation feedback index threshold is set and adjusted according to the needs during the actual operation.

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