Phase center measurement method, device, equipment, storage medium and product

Abstract

The present application relates to the field of wireless measurement technology and discloses a phase center measurement method, apparatus, device, storage medium and product. The method comprises: obtaining the measured phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the phase of a preset reference point, and calculating the initial phase center of the antenna to be measured based on the measured phase of the antenna to be measured, correcting the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain the corrected phase, calculating the current phase center of the antenna to be measured based on the corrected phase, and obtaining the phase center of the antenna to be measured based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured. The present application calculates the initial phase center of the antenna to be measured by obtaining the measured phase of the antenna to be measured, corrects the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured, and thus can obtain the phase center of the antenna to be measured, thereby improving the accuracy of phase center measurement.

Description

Technical Field

[0001] The present application relates to the field of wireless measurement technology, and in particular to a phase center measurement method, apparatus, device, storage medium, and product. Background Art

[0002] The phase center is a crucial antenna parameter, determining the directionality and accuracy of its electromagnetic radiation and reception. Phase center measurement allows for precise evaluation of antenna performance, ensuring its effectiveness and reliability in systems such as communications, radar, and navigation. The basic principle of phase center measurement is to indirectly infer the positional deviation of the actual phase center relative to a pre-determined reference point by measuring the antenna's phase data within a specific angle range and leveraging the linear relationship between phase and distance in electromagnetic wave propagation.

[0003] However, existing phase center measurement methods suffer from significant errors when measuring antennas with large eccentricities. Antennas mounted on vehicles, aircraft, and ships often deviate from the geometric center, making them difficult to correct using mobile measurement methods. The eccentricity can range from several meters to tens of meters, and the phase variations of the measuring antenna itself cannot be ignored. Because the phase pattern fluctuates with angle, significant differences can be observed in wide-angle measurements. Summary of the Invention

[0004] The main purpose of this application is to provide a phase center measurement method, device, equipment, storage medium and product, aiming to solve the technical problem that the existing phase center measurement technology will have large errors when measuring the phase center of an antenna with large eccentricity.

[0005] To achieve the above objectives, the present application proposes a phase center measurement method, which includes:

[0006] Based on the multi-angle phase of the measuring antenna and the phase of the preset reference point, the measured phase of the antenna to be measured is obtained, and the initial phase center of the antenna to be measured is calculated according to the measured phase of the antenna to be measured;

[0007] Correcting the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain a corrected phase;

[0008] The current phase center of the antenna to be measured is calculated according to the corrected phase, and the phase center of the antenna to be measured is obtained based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured.

[0009] In one embodiment, the step of calculating the current phase center of the antenna to be tested based on the corrected phase, and obtaining the phase center of the antenna to be tested based on the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested includes:

[0010] Calculating the current phase center of the antenna to be tested based on the corrected phase;

[0011] Comparing the position deviation of the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested;

[0012] The phase center of the antenna to be measured is obtained according to the position deviation and the preset convergence accuracy, and in combination with the preset convergence number.

[0013] In one embodiment, the step of obtaining the phase center of the antenna to be measured based on the position deviation and the preset convergence accuracy in combination with a preset convergence number includes:

[0014] If the position deviation is less than the preset convergence accuracy, the number of convergence times is incremented, and the iterative calculation result and the updated position deviation are obtained by iteratively calculating the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured;

[0015] When the updated position deviation is less than the preset convergence accuracy and the number of convergence times satisfies the preset convergence times, the phase center of the antenna to be measured is obtained based on the current phase center of the antenna to be measured, the initial phase center of the antenna to be measured and the iterative calculation result;

[0016] If the position deviation is not less than the preset convergence accuracy, obtaining the iterative position deviation by iteratively calculating the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured;

[0017] When the position deviation after iteration is less than a preset convergence accuracy, the phase center of the antenna to be measured is obtained based on a preset number of convergence times.

[0018] In one embodiment, when the updated position deviation is less than the preset convergence accuracy and the number of convergence times satisfies the preset number of convergence times, the step of obtaining the phase center of the antenna to be tested based on the current phase center of the antenna to be tested, the initial phase center of the antenna to be tested, and the iterative calculation result includes:

[0019] When the updated position deviation is less than the preset convergence accuracy and the number of convergence times satisfies the preset number of convergence times, performing pairwise comparisons on the current phase center of the antenna to be tested, the initial phase center of the antenna to be tested, and the iterative calculation result to obtain a comparison result;

[0020] If the comparison result is less than the preset convergence accuracy, the phase center of the antenna to be measured is obtained based on the average method or the function fitting method, combined with the current phase center of the antenna to be measured, the initial phase center of the antenna to be measured and the iterative calculation result.

[0021] In one embodiment, the step of correcting the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain the corrected phase includes:

[0022] Based on the initial phase center of the antenna to be measured and in combination with the geometric relationship between the measuring antenna and the antenna to be measured, calculating the angle at which the measuring antenna points to the initial phase center of the antenna to be measured at different measurement positions;

[0023] Querying a preset phase change value database for a measured antenna phase change value corresponding to the angle;

[0024] The measured phase of the antenna to be measured is corrected according to the phase change value of the measuring antenna to obtain a corrected phase.

[0025] In one embodiment, the step of obtaining the measured phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the preset reference point phase, and calculating the initial phase center of the antenna to be measured based on the measured phase of the antenna to be measured includes:

[0026] The phase change value of the measuring antenna is obtained by calculating the difference between the multi-angle phase of the measuring antenna and the phase of the preset reference point;

[0027] Measuring the phase pattern of the antenna to be measured based on the measured antenna phase change value to obtain the actual measured phase of the antenna to be measured;

[0028] A spherical model is constructed with the preset position as the center of the sphere, and the residual of the measured phase of the antenna to be tested to the spherical model is calculated to obtain the residual square sum;

[0029] The preset position corresponding to the minimum value of the residual square sum is selected as the initial phase center of the antenna to be tested.

[0030] In addition, to achieve the above-mentioned purpose, the present application also proposes a phase center measurement device, which includes:

[0031] An initial phase calculation module is used to obtain the measured phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the phase of a preset reference point, and to calculate the initial phase center of the antenna to be measured based on the measured phase of the antenna to be measured;

[0032] A phase correction module, configured to correct the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain a corrected phase;

[0033] The phase center acquisition module is used to calculate the current phase center of the antenna to be measured according to the corrected phase, and obtain the phase center of the antenna to be measured based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured.

[0034] In addition, to achieve the above-mentioned purpose, the present application also proposes a phase center measurement device, which includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the computer program is configured to implement the steps of the phase center measurement method described above.

[0035] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium, and when the computer program is executed by a processor, the steps of the phase center measurement method described above are implemented.

[0036] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the phase center measurement method described above are implemented.

[0037] The technical solution proposed in this application obtains the measured phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the phase of the preset reference point, and calculates the initial phase center of the antenna to be measured based on the measured phase of the antenna to be measured, corrects the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain the corrected phase, calculates the current phase center of the antenna to be measured based on the corrected phase, and obtains the phase center of the antenna to be measured based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured. This application calculates the initial phase center of the antenna to be measured by obtaining the measured phase of the antenna to be measured, corrects the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured, and thus can obtain the phase center of the antenna to be measured, thereby improving the accuracy of phase center measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 A flow chart of the first embodiment of the phase center measurement method of the present application is provided;

[0041] Figure 2 This is a schematic diagram of spherical eccentricity measurement;

[0042] Figure 3 Schematic diagram of measuring antenna phase variation with angle;

[0043] Figure 4 Schematic diagram of the antenna coordinate system for measurement of this application;

[0044] Figure 5 This is a schematic diagram of the measurement center coordinate system of this application system;

[0045] Figure 6 A schematic diagram of a flow chart of the second embodiment of the phase center measurement method of the present application;

[0046] Figure 7 Schematic diagram of the iterative calculation process of the phase center measurement method of this application;

[0047] Figure 8 A flow chart of the third embodiment of the phase center measurement method of the present application is provided;

[0048] Figure 9 This is a schematic diagram of the simulation model for this application;

[0049] Figure 10 Simulate the amplitude pattern of the DUT for this application;

[0050] Figure 11 Simulate the phase pattern of the device under test for this application;

[0051] Figure 12 Simulate and measure antenna phase patterns for this application;

[0052] Figure 13 Schematic diagram of the angle of the antenna pointing to the device under test for this application;

[0053] Figure 14 Schematic diagram of the phase change of the corresponding pointing antenna for this application measurement;

[0054] Figure 15 This is a schematic diagram of the module structure of the phase center measurement device according to an embodiment of the present application;

[0055] Figure 16 Schematic diagram of the device structure of the hardware operating environment involved in the phase center measurement method in the embodiment of the present application.

[0056] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0057] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0058] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0059] Existing phase center measurement methods suffer from significant errors when measuring antennas with large eccentricities. Antennas mounted on vehicles, aircraft, and ships often deviate from the geometric center, making them difficult to correct using mobile measurement methods. The eccentricity can range from several meters to tens of meters, and the phase variations of the measuring antenna itself cannot be ignored. Because the phase pattern fluctuates with angle, significant differences can be observed in wide-angle measurements.

[0060] Therefore, in order to overcome the above-mentioned defects, the present application provides a solution, which calculates the initial phase center of the antenna to be measured by obtaining the actual measured phase of the antenna to be measured, and corrects the actual measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured, thereby obtaining the phase center of the antenna to be measured, thereby improving the accuracy of the phase center measurement.

[0061] It should be noted that the execution entity of each embodiment of the present application can be a computing service device with data processing, network communication, and program execution functions, such as an electronic device capable of implementing the above functions, a phase center measurement device, etc. The following embodiments are described using a phase center measurement device as an example.

[0062] Based on this, the embodiment of the present application provides a phase center measurement method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the phase center measurement method of the present application.

[0063] In this embodiment, the phase center measurement method includes steps S10 to S30:

[0064] Step S10: obtaining the measured phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the phase of the preset reference point, and calculating the initial phase center of the antenna to be measured according to the measured phase of the antenna to be measured.

[0065] It should be noted that phase refers to the position of a wave in its cycle at a specific moment. In other words, phase describes the scale of whether a wave is at a peak, a trough, or a point in between. In addition, the performance of most wireless devices, i.e., devices under test (DUTs) (such as aircraft, satellites, communication equipment, and various mobile devices), requires wireless performance measurement before they can be used outside the factory. For some high-precision measurement requirements (such as navigation and positioning), an accurate reference point must be present during the calculation. This reference point is the phase center of the antenna under test. The DUTs are all equipped with antennas as key components for signal transmission and reception. Due to the physical properties of the antenna under test (i.e., the antenna installed on the DUT), its geometric center and phase center cannot be completely consistent. Coupled with the errors caused by the processing and installation processes, the phase center obtained by simulation will also deviate from the phase center of the actual object.

[0066] For easier understanding, refer to Figure 2This invention is provided for illustration, but is not intended to limit the present application. Figure 2 This is a diagram of spherical eccentricity measurement. Assuming that the antenna under test is far away from the center of the system, and the measuring antenna vertex is generally always pointing to the center of the system, the angle of the measuring antenna pointing to the antenna under test will vary greatly at different measurement positions. Since the antenna under test is far away from the center of the system, when the measuring antenna is measured at different positions, the angle of the measuring antenna pointing to the antenna under test will vary greatly due to changes in distance and position. Figure 3 It can be seen that the phase of the measured antenna is greatly affected by the angle change. This difference cannot be ignored in the eccentric antenna measurement scenario. For this reason, the present application corrects the phase fluctuations of the measuring antenna itself at different angles and performs iterative calculations to reduce the phase error introduced by the measuring antenna itself, thereby obtaining a more accurate initial phase center of the antenna to be measured. In this process, the present application can be compatible with various phase center measurement and calculation methods, and this embodiment imposes restrictions on this.

[0067] It should be understood that the phase of the antenna under test is measured from multiple angles using a measuring antenna, and a reference phase value is obtained by measuring the phase of a preset reference point for comparison with the phase of the antenna under test. The preset reference point should be selected within an angle where the phase of the measuring antenna is relatively stable (e.g., within the half-power beamwidth). For example, the antenna vertex can be selected as the preset reference point. Then, by comparing and correcting the phase measured by the measuring antenna from multiple angles with the phase of the preset reference point, the actual measured phase of the antenna under test can be obtained.

[0068] Specifically, step S10 may include: obtaining a phase change value of the measuring antenna by calculating the difference between the multi-angle phase of the measuring antenna and the phase of a preset reference point; measuring the phase pattern of the antenna to be measured based on the phase change value of the measuring antenna to obtain the actual phase of the antenna to be measured; constructing a spherical model with a preset position as the center of the sphere, and calculating the residual from the actual measured phase of the antenna to be measured to the spherical model to obtain the residual sum of squares; and selecting the preset position corresponding to the minimum value of the residual sum of squares as the initial phase center of the antenna to be measured.

[0069] It can be understood that by measuring the multi-angle phase of the antenna and subtracting it from the phase of the preset reference point, the phase change value of the measured antenna can be obtained, and then by measuring the phase change value of the antenna, the phase radiation pattern of the antenna to be measured can be drawn. Obviously, the phase radiation pattern is a graph that describes the change of the antenna phase response with direction. According to the phase radiation pattern of the antenna to be measured, the measured phase of the antenna to be measured at each measurement angle is extracted.

[0070] In practice, the antenna's phase center may vary due to various factors, such as antenna structure and feeding method. To find an approximate, stable phase center, a spherical model can be constructed to simulate the antenna's phase distribution. This provides a continuous, smooth phase surface, making it easier to find the phase center. By selecting a preset position as the center of the sphere, a spherical model can be constructed to simulate the spatial distribution of the antenna's phase response.

[0071] Furthermore, by calculating the difference between the measured phase of the antenna under test at each measurement angle and the predicted value at the corresponding position of the spherical model, a series of residuals are obtained. To quantify the magnitude of the residuals, the sum of the squares of all residuals is calculated, which reflects the overall degree of difference between the measured phase values ​​and the values ​​predicted by the spherical model. The position with the smallest sum of squared residuals indicates that the phase distribution at that position is closest to that of the spherical model. Therefore, this position can be considered the initial phase center of the antenna under test. This process improves data measurement accuracy.

[0072] For easier understanding, refer to Figure 4 and Figure 5 This invention is provided for illustration, but is not intended to limit the present application. Figure 4 Schematic diagram of the antenna coordinate system for this application measurement. Figure 5 This is a schematic diagram of the measurement center coordinate system of the application system. The phase pattern of the measuring antenna at its phase center can be measured in advance. Taking a certain angle phase as a preset reference point, the phase of the measuring antenna at each angle is subtracted from the preset reference point phase to obtain the phase change value of the measuring antenna at different angles. Here It is the angle in the measurement antenna coordinate system. The z-axis is the direction of the measurement antenna apex. In most test systems, the antenna apex points to the system measurement center.

[0073] Then, using the known phase change value The measurement antenna measures the phase pattern of the antenna under test. The specific measurement process can be: fix the measurement antenna so that the vertex of the measurement antenna points to the rotation center of the device under test, and use the multi-dimensional turntable to rotate the device under test three-dimensionally around the rotation center of the system. Each time it rotates an angle, the actual phase pattern of the antenna under test at the corresponding angle is measured. like Figure 5 As shown here It is the angle in the system measurement coordinate system. Different measurement methods can be used depending on the system, such as keeping the DUT stationary and rotating the measurement antenna, or rotating both the measurement antenna and the DUT. The key is to keep the measurement antenna vertex pointing to the rotation center and keep the distance unchanged, and then sample and measure different angles of the DUT. Calculations are performed to obtain the initial phase center P0 of the antenna under test. P0 is typically a three-dimensional coordinate relative to the rotation center of the device under test and can be expressed as (Δx0, Δy0, Δz0). The basic calculation principle is to find a position in space that minimizes the sum of the squares of the residuals from the center of the sphere to the spherical surface.

[0074] Step S20: Correcting the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain a corrected phase.

[0075] It is understandable that the phase correction amount relative to the initial phase center of the antenna to be measured at each measurement angle is calculated, and the phase data at each measurement angle is corrected one by one accordingly to obtain the corrected phase.

[0076] Step S30: Calculate the current phase center of the antenna to be measured based on the corrected phase, and obtain the phase center of the antenna to be measured based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured.

[0077] It should be understood that the corrected phase has eliminated the phase deviation caused by measurement error, antenna installation position deviation or environmental factors, and thus can more accurately reflect the phase response of the antenna at different angles or conditions.

[0078] When calculating the current phase center of the antenna under test, mathematical models or algorithms (such as geometric analysis, statistical analysis, and numerical optimization) can be used to process and analyze large amounts of phase data and extract the position of the phase center. The specific choice depends on the type of antenna under test, the measurement conditions, and the required level of accuracy. The current phase center of the antenna under test is compared with the initial phase center of the antenna under test, and an appropriate algorithm or method (such as the average method or fitting method) is used to obtain the final phase center of the antenna under test.

[0079] This embodiment obtains the actual phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the phase of a preset reference point, and calculates the initial phase center of the antenna to be measured according to the actual measured phase of the antenna to be measured, corrects the actual measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain the corrected phase, calculates the current phase center of the antenna to be measured according to the corrected phase, and obtains the phase center of the antenna to be measured based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured, calculates the initial phase center of the antenna to be measured by obtaining the actual measured phase of the antenna to be measured, corrects the actual measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured, and thus can obtain the phase center of the antenna to be measured, thereby improving the accuracy of phase center measurement.

[0080] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 6 , the step S30 may include steps S301 to S303:

[0081] Step S301: Calculate the current phase center of the antenna to be tested according to the corrected phase.

[0082] Step S302: comparing the position deviation of the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested.

[0083] It should be understood that the calculated current phase center of the antenna under test is compared with the initial phase center of the antenna under test to assess the positional deviation between them. This positional deviation can be assessed by calculating the distance or angle difference between the two phase centers. The purpose of this step is to determine the accuracy and reliability of the current measurement results and whether further iterative calculations are needed to optimize the phase center position.

[0084] Step S303: obtaining the phase center of the antenna to be measured according to the position deviation and the preset convergence accuracy, in combination with the preset convergence times.

[0085] It is understandable that the final phase center of the antenna to be tested is determined based on the position deviation, the preset convergence accuracy, and the preset number of convergences. The preset convergence accuracy is a threshold value used to determine whether the current phase center of the antenna to be tested is close enough to the true phase center. If the position deviation is less than the preset convergence accuracy, the current phase center of the antenna to be tested is considered to be relatively accurate and can be used as the basic data for iterative calculation. In order to further improve the accuracy, the preset number of convergences needs to be considered. The preset number of convergences is a limiting condition used to determine the number of iterative calculations. If the position deviation is still greater than the preset convergence accuracy after multiple iterations, but the preset number of convergences has been reached, the iteration is stopped.

[0086] Specifically, step S303 may include:

[0087] If the position deviation is less than the preset convergence accuracy, the number of convergence times is incremented, and the iterative calculation result and the updated position deviation are obtained by iteratively calculating the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured;

[0088] When the updated position deviation is less than the preset convergence accuracy and the number of convergence times satisfies the preset convergence times, the phase center of the antenna to be measured is obtained based on the current phase center of the antenna to be measured, the initial phase center of the antenna to be measured and the iterative calculation result;

[0089] If the position deviation is not less than the preset convergence accuracy, obtaining the iterative position deviation by iteratively calculating the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured;

[0090] When the position deviation after iteration is less than a preset convergence accuracy, the phase center of the antenna to be measured is obtained based on a preset number of convergence times.

[0091] It's understood that during the iterative calculation process, the positional deviation between the current phase center of the antenna under test and its initial phase center is first calculated. If this deviation is less than the preset convergence accuracy, it indicates that the current phase center of the antenna under test is likely quite close to the true phase center. However, to ensure the stability and accuracy of the results, the iterations are not terminated immediately. Instead, the convergence number is incremented and the iterative calculation continues.

[0092] In each iteration, the phase center is recalculated based on the new estimated values ​​of the current phase center of the antenna under test and the initial phase center of the antenna under test, and an updated position deviation is obtained. When the updated position deviation is still less than the preset convergence precision, and the number of convergences has reached the preset number of convergences, it can be considered that the iterative process has been sufficient and the position of the current phase center is accurate enough to be used as the final phase center of the antenna under test for comprehensive calculation. By setting the preset number of convergences, excessive iterations are avoided, thereby saving computing time and resources. On the other hand, if the initial position deviation is not less than the preset convergence precision, the iterative calculation will continue until a post-iteration position deviation is obtained that is less than the preset convergence precision.

[0093] Furthermore, when the updated position deviation is less than the preset convergence accuracy and the number of convergences meets the preset convergence number, the step of obtaining the phase center of the antenna to be measured based on the current phase center of the antenna to be measured, the initial phase center of the antenna to be measured and the iterative calculation result may also include: when the updated position deviation is less than the preset convergence accuracy and the number of convergences meets the preset convergence number, performing pairwise comparisons on the current phase center of the antenna to be measured, the initial phase center of the antenna to be measured and the iterative calculation result to obtain a comparison result; if the comparison result is less than the preset convergence accuracy, then obtaining the phase center of the antenna to be measured based on the average value method or the function fitting method, combined with the current phase center of the antenna to be measured, the initial phase center of the antenna to be measured and the iterative calculation result.

[0094] It should be understood that when the updated position deviation is less than the preset convergence accuracy and the number of convergences meets the preset number of convergences, the current phase center of the antenna under test, the initial phase center of the antenna under test, and all iterative calculation results are compared pairwise to ensure that the iterative process stops quickly after reaching sufficient accuracy, avoiding the problem of slow convergence or oscillation of the iterative process when approaching the convergence point, thereby improving the convergence speed. The pairwise comparison process can be to calculate the position deviation or distance between them and check whether these deviations or distances are all less than the preset convergence accuracy. If the results of the pairwise comparisons are all less than the preset convergence accuracy, then it can be considered that the current iterative calculation results are sufficiently accurate. In order to obtain the final phase center of the antenna under test, the average value method or function fitting method can be used for calculation to further smooth the data and reduce errors.

[0095] It should be noted that the averaging method averages all relevant phase center position estimates to obtain a comprehensive, averaged phase center position. The function fitting method uses a mathematical function (such as a polynomial or exponential function) to fit all relevant phase center position estimates, resulting in a smoother and more accurate phase center position estimate. The averaging method is simple and easy to use, but may not fully capture the nonlinear variations in the phase center position. The function fitting method can handle nonlinear data more flexibly, but may require more computing resources and a more complex mathematical model. Therefore, in practical applications, it is necessary to select the most appropriate method based on the specific situation.

[0096] For easier understanding, refer to Figure 7 This invention is intended to illustrate, but not to limit, this application. Figure 7 This is a schematic diagram of the iterative calculation process of the phase center measurement method of this application. Assuming that the initial phase center P0 (Δx0, Δy0, Δz0) of the antenna to be measured is used as the reference position, the steps for obtaining the phase center of the antenna to be measured can be:

[0097] Step 1: Calculate the angle of the measuring antenna pointing to P0 at different measurement positions based on the measured data and geometric relationships according to Query the phase change value of the measured antenna at the corresponding angle Correct the measured data to At this point, we assume that P0 is the actual phase center. Substituting this position into the measurement antenna phase results in a set of measurement data with measurement antenna phase calibration. After correction, this is equivalent to assuming that the measurement antenna is a point source, and the phase at different angles is constant. This can calibrate the error in the actual measurement results caused by the measurement antenna phase changing with angle.

[0098] Step 2: According to the corrected phase Calculation is performed to obtain the current phase center P1 of the antenna under test, which can be recorded as (Δx1, Δy1, Δz1). The result of P1 is equivalent to a test of the previous calculation result. The closer P0 is to the true phase center, the smaller the position deviation between P1 and P0 should be.

[0099] Step 3: Since P0 may not be the actual phase center of the antenna to be tested, the results calculated in step 1 and step 2 may be different. Compare the deviation of the phase centers of the two antennas to be tested, P1 and P0. If the position is considered to be converged within the preset convergence accuracy, the average position of P1 and P0 can be used as the phase center of the antenna to be measured, that is, ((Δx1-Δx0) / 2 , (Δy1-Δy0) / 2 , (Δz1-Δz0) / 2). If the position exceeds the preset convergence accuracy range, then using P1 as the reference position, repeat steps 1-3 until the deviation from the previous position is less than the preset convergence accuracy. The judgment method and the number of convergence attempts can be selected based on requirements. For example, if the deviation is within the preset convergence accuracy for multiple consecutive times (two, three, etc.), the phase center is considered accurate. This multiple convergence can prevent calculation errors caused by accidental factors. For example, if the number of convergence attempts required to meet the accuracy is two, the differences between Pn, P(n+1), and P(n+2) (where n represents the phase center value calculated for the nth time) must all meet the deviation requirements, that is, these points must all fall within a sphere with the accuracy as the diameter. If multiple convergence attempts are required, the center coordinates can be calculated by averaging multiple convergence points or using other fitting methods to obtain the final phase center of the antenna under test. The reason for not directly using the last calculated result as the final result is that the iterative calculation result may fluctuate within a range and is not monotonically accurate. Therefore, using an averaging or fitting method is more reasonable. In addition, for multiple convergences, once a non-convergence point appears in the middle of the calculation, the number of convergences must be recalculated.

[0100] This embodiment improves the accuracy of phase center measurement by calculating the current phase center of the antenna under test based on the corrected phase, comparing the positional deviation between the current phase center of the antenna under test and the initial phase center of the antenna under test, and obtaining the phase center of the antenna under test based on the positional deviation and a preset convergence precision, combined with a preset convergence number. If the positional deviation is less than the preset convergence precision, an iterative calculation is performed until the required convergence number is met. When the updated positional deviation meets the preset convergence precision and the number of convergences is met, the stability of the results is confirmed through pairwise comparisons, and the phase center of the antenna under test is ultimately determined using an average method or a function fitting method. This ensures the stability and reliability of the iterative results, enables more flexible processing of measurement data, and results in a more accurate phase center of the antenna under test.

[0101] Based on the first embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those in the above embodiment 1 can be referred to the above introduction and will not be described in detail later. Figure 8 , the step S20 may include steps S201 to S203:

[0102] Step S201 : Based on the initial phase center of the antenna to be measured and in combination with the geometric relationship between the measuring antenna and the antenna to be measured, calculating the angle of the measuring antenna pointing to the initial phase center of the antenna to be measured at different measurement positions.

[0103] Step S202: querying a preset phase change value database for a measured antenna phase change value corresponding to the angle.

[0104] It should be understood that the preset phase change value database is used to query the corresponding measured antenna phase change value based on the angle calculated in step S201. The preset phase change value database may include phase change data of the measured antenna at different angles, which may be obtained through previous experiments or calibration processes.

[0105] Step S203: Correct the measured phase of the antenna to be measured according to the measured antenna phase change value to obtain a corrected phase.

[0106] It is understandable that the measured phase of the antenna to be measured is corrected using the queried phase change value of the measuring antenna to eliminate the error caused by the phase change of the measuring antenna itself.

[0107] For example, according to the basic principle of antenna radiation, the measured phase of the antenna to be measured can be written as follows:

[0108]

[0109] Where, Indicates where Δx, Δy, and Δz are the positional deviations between the phase center of the DUT (the initial phase center of the DUT) and the measurement reference point (the measurement rotation center or the initial phase center of the DUT). k = 2π / λ is the wave number in vacuum. C is a constant representing the reference phase when the phase center of the DUT is at the measurement rotation center. Here, the radiation from the DUT is assumed to be a perfect spherical wave.

[0110] However, in actual situations, there is no phase center that makes the phase change equal to 0, so formula (1) generally has no numerical solution, but there is a least squares solution. When the measured phase of the antenna to be tested is obtained In this case, the values ​​of Δx, Δy, and Δz can be calculated using the least squares method.

[0111] Assume that the initial phase center P0(Δx0, Δy0, Δz0) of the antenna under test is first calculated using formula (1) without measuring the phase correction of the antenna. The angle at which the measuring antenna points to the antenna under test can be calculated inversely through geometric relationships and the corresponding phase change value of the measuring antenna is obtained

[0112] Then, formula (1) is corrected to the following form:

[0113]

[0114] In the formula, represents the corrected phase; Δx1, Δy1, and Δz1 are the three-dimensional coordinate data of the current phase center of the antenna under test

[0115] The phase center of the measured component (the current phase center of the antenna under test) P1(Δx1, Δy1, Δz1) is calculated by the least squares method. The position deviation between the phase centers P0 and P1 calculated twice is compared, and the calculation formula is as follows:

[0116]

[0117] In the formula, Δd1 represents the position deviation between the initial phase center and the current phase center of the antenna under test; the content in the parentheses on the right side of the formula represents the coordinate difference between the initial phase center and the current phase center of the antenna under test

[0118] Formula (3) is compared with the preset convergence accuracy d0. If Δd1 < d0, it is considered that the calculation converges this time; otherwise, it does not converge, and the above steps are repeated. Assume that the required number of convergence times is n times. Then, the deviation between every two of the consecutive n + 1 points, Δd (calculated according to formula (3)), needs to be less than the preset convergence accuracy d0. Then, the center of the sphere is fitted out from these n + 1 points by taking the average value or the least squares method, and it is used as the final phase center of the antenna under test

[0119] For the sake of easy understanding, reference is made to Figures 9 to 14 for illustration, but it does not limit this application Figure 9 is the schematic diagram of the simulation model of this application Figure 10 is the amplitude pattern of the simulated measured component of this application Figure 11 is the phase pattern of the simulated measured component of this application Figure 12 is the phase pattern of the simulated measuring antenna of this application Figure 13 is the schematic diagram of the angle at which the measuring antenna of this application points to the measured component Figure 14This is a schematic diagram of the corresponding directional phase change of the measurement antenna of this application. The phase center measurement method of this application can be further explained through a simulation example: its main idea is to first measure the phase pattern of the measurement antenna itself, and compensate (i.e., correct) it to the test phase of the device under test (with the antenna to be tested installed) (i.e., the actual measured phase of the antenna to be tested). Since the phase center of the antenna to be tested is unknown at the beginning, it is impossible to directly compensate the phase of the measurement antenna, and it is necessary to use an iterative compensation method to make the phase center calculation result converge. Figure 9 As shown in the figure, the phase center of the simulated antenna to be measured is placed at the coordinate position (3, 0, 0), the system ranging is 5m (the distance from the measuring antenna to the system measurement center), the measuring antenna is substituted into the real antenna pattern data, and the received signal of the measuring antenna at different positions is simulated and calculated to simulate the actual measurement process.

[0120] The device under test is The amplitude and phase patterns in the interval θ (-120°, 120°) are as follows: Figure 10 and Figure 11 As shown, the phase pattern of the measurement antenna is as follows Figure 12 As shown. Based on the formula (1), the initial phase center coordinates of the DUT are calculated to be (2.8675, 0, -0.1120). The coordinates are used as reference points to calculate the pointing angle θ of the probe to the DUT within the measurement angle θ of (-120°, 120°). p (Because in this example Unchanged, so not shown ), the result is as follows Figure 13 As shown, and the corresponding (like Figure 14 as shown) and the phase data after compensation according to Calculate the phase center again. According to the above method, the relevant data of multiple iterative calculations are recorded in Table 1. Assuming that two convergences are required (three adjacent calculation results need to meet the convergence conditions), and the convergence accuracy is 0.01m, then the 2nd, 3rd, and 4th calculations in the table meet the requirements. The average coordinates (2.9275, 0, -0.0512) are calculated by averaging the 2nd, 3rd, and 4th calculations. The final phase center is (2.9275, 0, -0.0512), which deviates from the actual phase center (3, 0, 0) by 0.08876m. The result of measuring the antenna phase calibration without using the method of the present invention deviates from the actual result by 0.1735m. It can be seen that this method has a significant effect of improving the accuracy.

[0121] Table 1 Iterative calculation data record table

[0122] Calculation times Phase center / m Maximum error of three consecutive times / m Actual error / m 1 (2.8675，0，-0.1120) / 0.1735 2 (2.9279，0，-0.0505) / 0.0880 3 (2.9272，0，-0.0516) 0.0862 0.0892 4 (2.9274，0，-0.0516) 0.0013 0.0891

[0123] This embodiment calculates the angle at which the measuring antenna points to the initial phase center of the antenna to be measured at different measurement positions based on the initial phase center of the antenna to be measured and in combination with the geometric relationship between the measuring antenna and the antenna to be measured, queries the measuring antenna phase change value corresponding to the angle in a preset phase change value database, corrects the actual measured phase of the antenna to be measured according to the measuring antenna phase change value, and obtains the corrected phase, thereby optimizing the phase correction process and improving measurement accuracy.

[0124] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the phase center measurement method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0125] This application also provides a phase center measurement device, please refer to Figure 15 , the phase center measuring device comprises:

[0126] An initial phase calculation module 10 is configured to obtain the measured phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the phase of a preset reference point, and to calculate the initial phase center of the antenna to be measured based on the measured phase of the antenna to be measured;

[0127] A phase correction module 20 is configured to correct the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain a corrected phase;

[0128] The phase center acquisition module 30 is configured to calculate the current phase center of the antenna to be measured according to the corrected phase, and obtain the phase center of the antenna to be measured based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured.

[0129] The phase center measurement device provided in this application, which utilizes the phase center measurement method described in the aforementioned embodiment, can address the technical issue of existing phase center measurement techniques causing significant errors when measuring the phase center of antennas with large eccentricities. Compared to the prior art, the beneficial effects of the phase center measurement device provided in this application are the same as those of the phase center measurement method described in the aforementioned embodiment. Other technical features of the phase center measurement device are the same as those disclosed in the aforementioned embodiment and are not further detailed here.

[0130] The present application provides a phase center measurement device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the phase center measurement method in the above-mentioned embodiment one.

[0131] Reference below Figure 16, which shows a schematic diagram of the structure of a phase center measurement device suitable for implementing the embodiments of the present application. The phase center measurement device in the embodiments of the present application can include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Devices), PMPs (Portable Media Players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 16 The phase center measurement device shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0132] like Figure 16 As shown, the phase center measurement device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. RAM 1004 also stores various programs and data required for the operation of the phase center measurement device. Processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input device 1007 including, for example, a touch screen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output device 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage device 1003 including, for example, a magnetic tape, hard disk, etc.; and communication device 1009. Communication device 1009 can allow the phase center measurement device to communicate with other devices wirelessly or wired to exchange data. Although the figure shows a phase center measurement device with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or provided instead.

[0133] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0134] The phase center measurement device provided in this application, employing the phase center measurement method of the aforementioned embodiment, can resolve the technical issue of existing phase center measurement techniques causing significant errors when measuring the phase center of antennas with large eccentricities. Compared to the prior art, the beneficial effects of the phase center measurement device provided in this application are the same as those of the phase center measurement method provided in the aforementioned embodiment. Other technical features of the phase center measurement device are the same as those disclosed in the aforementioned embodiment and are not further elaborated here.

[0135] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0136] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0137] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer program) stored thereon, and the computer-readable program instructions are used to execute the phase center measurement method in the above embodiment.

[0138] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0139] The computer-readable storage medium may be included in the phase center measurement device; or may exist independently without being assembled into the phase center measurement device.

[0140] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the phase center measurement device, the phase center measurement device: obtains the actual measured phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the preset reference point phase, and calculates the initial phase center of the antenna to be measured based on the actual measured phase of the antenna to be measured, corrects the actual measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain the corrected phase, calculates the current phase center of the antenna to be measured based on the corrected phase, and obtains the phase center of the antenna to be measured based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured.

[0141] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0142] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0143] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0144] The computer-readable storage medium provided in this application stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned phase center measurement method. This computer-readable storage medium can address the technical issue of existing phase center measurement techniques causing significant errors when measuring the phase center of antennas with large eccentricities. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the phase center measurement method provided in the aforementioned embodiments, and are not further elaborated here.

[0145] The present application also provides a computer program product, comprising a computer program, which implements the steps of the above-mentioned phase center measurement method when executed by a processor.

[0146] The computer program product provided in this application can address the technical issue of existing phase center measurement techniques causing significant errors when measuring the phase center of antennas with large eccentricities. Compared to existing techniques, the computer program product provided in this application offers the same beneficial effects as the phase center measurement methods provided in the aforementioned embodiments, and will not be further elaborated here.

[0147] The above descriptions are only some embodiments of the present application and do not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A phase center measurement method, characterized in that: The method comprises the following steps: Based on the multi-angle phase of the measuring antenna and the phase of the preset reference point, the measured phase of the antenna to be measured is obtained, and the initial phase center of the antenna to be measured is calculated according to the measured phase of the antenna to be measured; Correcting the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain a corrected phase; Calculating the current phase center of the antenna to be measured based on the corrected phase, and obtaining the phase center of the antenna to be measured based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured; The step of obtaining the measured phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the phase of the preset reference point, and calculating the initial phase center of the antenna to be measured according to the measured phase of the antenna to be measured includes: The phase change value of the measuring antenna is obtained by calculating the difference between the multi-angle phase of the measuring antenna and the phase of the preset reference point; Measuring the phase pattern of the antenna to be measured based on the measured antenna phase change value to obtain the actual measured phase of the antenna to be measured; A spherical model is constructed with the preset position as the center of the sphere, and the residual of the measured phase of the antenna to be tested to the spherical model is calculated to obtain the residual square sum; Selecting the preset position corresponding to the minimum value of the residual square sum as the initial phase center of the antenna to be tested; The step of correcting the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain a corrected phase includes: Based on the initial phase center of the antenna to be measured and in combination with the geometric relationship between the measuring antenna and the antenna to be measured, calculating the angle at which the measuring antenna points to the initial phase center of the antenna to be measured at different measurement positions; Querying a preset phase change value database for a measured antenna phase change value corresponding to the angle; The measured phase of the antenna to be measured is corrected according to the phase change value of the measuring antenna to obtain a corrected phase.

2. The phase center measurement method according to claim 1, wherein: The step of calculating the current phase center of the antenna to be measured based on the corrected phase, and obtaining the phase center of the antenna to be measured based on the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured, includes: Calculating the current phase center of the antenna to be tested based on the corrected phase; Comparing the position deviation of the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested; The phase center of the antenna to be measured is obtained according to the position deviation and the preset convergence accuracy, and in combination with the preset convergence number.

3. The phase center measurement method according to claim 2, wherein: The step of obtaining the phase center of the antenna to be measured based on the position deviation and the preset convergence accuracy in combination with the preset convergence number includes: If the position deviation is less than the preset convergence accuracy, the number of convergence times is incremented, and the iterative calculation result and the updated position deviation are obtained by iteratively calculating the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured; When the updated position deviation is less than the preset convergence accuracy and the number of convergence times satisfies the preset convergence times, the phase center of the antenna to be measured is obtained based on the current phase center of the antenna to be measured, the initial phase center of the antenna to be measured and the iterative calculation result; If the position deviation is not less than the preset convergence accuracy, obtaining the iterative position deviation by iteratively calculating the current phase center of the antenna to be measured and the initial phase center of the antenna to be measured; When the position deviation after iteration is less than a preset convergence accuracy, the phase center of the antenna to be measured is obtained based on a preset number of convergence times.

4. The phase center measurement method according to claim 3, wherein: The step of obtaining the phase center of the antenna to be measured based on the current phase center of the antenna to be measured, the initial phase center of the antenna to be measured, and the iterative calculation result when the updated position deviation is less than the preset convergence accuracy and the convergence number meets the preset convergence number includes: When the updated position deviation is less than the preset convergence accuracy and the number of convergence times satisfies the preset number of convergence times, performing pairwise comparisons on the current phase center of the antenna to be tested, the initial phase center of the antenna to be tested, and the iterative calculation result to obtain a comparison result; If the comparison result is less than the preset convergence accuracy, the phase center of the antenna to be measured is obtained based on the average method or the function fitting method, combined with the current phase center of the antenna to be measured, the initial phase center of the antenna to be measured and the iterative calculation result.

5. A phase center measurement device, characterized in that: The phase center measuring device comprises: An initial phase calculation module is used to obtain the measured phase of the antenna to be measured based on the multi-angle phase of the measuring antenna and the phase of a preset reference point, and to calculate the initial phase center of the antenna to be measured based on the measured phase of the antenna to be measured; A phase correction module, configured to correct the measured phase of the antenna to be measured based on the initial phase center of the antenna to be measured to obtain a corrected phase; A phase center acquisition module, configured to calculate the current phase center of the antenna to be tested based on the corrected phase, and obtain the phase center of the antenna to be tested based on the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested; The initial phase calculation module is further configured to obtain a phase change value of the measuring antenna by calculating the difference between the multi-angle phase of the measuring antenna and the phase of a preset reference point; measure the phase pattern of the antenna to be measured based on the phase change value of the measuring antenna to obtain the measured phase of the antenna to be measured; construct a spherical model with a preset position as the center of the sphere, and calculate the residual from the measured phase of the antenna to be measured to the spherical model to obtain the residual sum of squares; and select the preset position corresponding to the minimum value of the residual sum of squares as the initial phase center of the antenna to be measured; The phase center acquisition module is further used to calculate the angle at which the measuring antenna points to the initial phase center of the antenna to be measured at different measurement positions based on the initial phase center of the antenna to be measured and in combination with the geometric relationship between the measuring antenna and the antenna to be measured; query the measuring antenna phase change value corresponding to the angle in a preset phase change value database; and correct the actually measured phase of the antenna to be measured according to the measuring antenna phase change value to obtain a corrected phase.

6. A phase center measurement device, characterized in that: The phase center measurement device includes: a memory, a processor, and a phase center measurement program stored in the memory and executable on the processor. When the phase center measurement program is executed by the processor, the phase center measurement method according to any one of claims 1 to 4 is implemented.

7. A storage medium, characterized in that: The storage medium stores a phase center measurement program, which implements the phase center measurement method according to any one of claims 1 to 4 when executed by a processor.

8. A computer program product, characterized in that The computer program product comprises a phase center measurement program, and when the phase center measurement program is executed by a processor, the phase center measurement method according to any one of claims 1 to 4 is implemented.

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