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

Abstract

The invention relates to the technical field of wireless measurement, and discloses a phase center measurement method, device and equipment, a storage medium and a product, and the method comprises the steps: obtaining the actual measurement phase of a to-be-measured antenna based on the measurement of the multi-angle phase of the antenna and the phase of a preset reference point, and calculating the initial phase center of the to-be-measured antenna according to the actual measurement phase of the to-be-measured antenna, correcting the actually measured phase of the to-be-measured antenna based on the initial phase center of the to-be-measured antenna to obtain a corrected phase, calculating the current phase center of the to-be-measured antenna according to the corrected phase, and obtaining the phase center of the to-be-measured antenna based on the current phase center of the to-be-measured antenna and the initial phase center of the to-be-measured antenna. The initial phase center of the to-be-measured antenna is calculated by acquiring the actually measured phase of the to-be-measured antenna, and the actually measured phase of the to-be-measured antenna is corrected according to the initial phase center of the to-be-measured antenna, so that the phase center of the to-be-measured antenna can be acquired, and the accuracy of phase center measurement is improved.

Description

Technical Field

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

[0002] Phase center is an important parameter of the antenna, which determines the directionality and accuracy of the antenna's radiation and reception of electromagnetic waves. By measuring the phase center, the performance of the antenna can be accurately evaluated to ensure the effectiveness and reliability of the antenna in communication, radar, navigation and other systems. The basic principle of phase center measurement is to indirectly infer the position deviation of the actual phase center relative to the preset measurement reference point by measuring the phase data of the antenna within a specific angle range and using the linear relationship between phase and distance in electromagnetic wave propagation.

[0003] However, the existing phase center measurement method has large errors when measuring antennas with large eccentricity. For example, the antenna installation position of vehicles, aircraft, and ships often deviates from the geometric center, and it is difficult to correct it through mobile measurement. The eccentricity distance may be several meters to tens of meters. At this time, the phase change of the measuring antenna itself cannot be ignored, because its phase pattern fluctuates with angle, and the difference is significant in wide-angle measurement. 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 object, the present application proposes a phase center measurement method, the method comprising:

[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 tested based on the initial phase center of the antenna to be tested 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 according to 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] According to the corrected phase, the current phase center of the antenna to be tested is calculated;

[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 in combination with the preset convergence number.

[0013] In one embodiment, the step of 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 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 tested and the initial phase center of the antenna to be tested;

[0015] 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 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 position deviation after iteration by iteratively calculating the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested;

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

[0018] In one embodiment, when the updated position deviation is less than the preset convergence accuracy and the convergence number satisfies the preset convergence number, 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 convergence number meets the preset convergence number, 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 are compared in pairs 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 tested is obtained based on the average value method or the function fitting method, combining 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.

[0021] In one embodiment, the step of correcting the measured phase of the antenna to be tested based on the initial phase center of the antenna to be tested 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 measuring positions;

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

[0024] The actual measured phase of the antenna to be measured is corrected according to the measured antenna phase change value 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 according to 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 from 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 in 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, the phase center measurement device comprising:

[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 calculate the initial phase center of the antenna to be measured according to the measured phase of the antenna to be measured;

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

[0033] The phase center acquisition module is used to calculate the current phase center of the antenna to be tested according to 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.

[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 in the memory and executable on the processor, and 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, and a computer program is stored on the storage medium. 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, and 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 the present application obtains the actual phase of the antenna to be measured based on the multi-angle phase of the measured antenna and the phase of the preset reference point, and calculates the initial phase center of the antenna to be measured based on the actual phase of the antenna to be measured, corrects the actual 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. The present application calculates the initial phase center of the antenna to be measured by obtaining the actual phase of the antenna to be measured, corrects the actual phase of the antenna to be measured based on the initial phase center of the antenna to be measured, and then obtains the phase center of the antenna to be measured, thereby improving the accuracy of the 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

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

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

[0042] Figure 3 Schematic diagram for measuring the change of antenna phase 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 the application system;

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

[0046] Figure 7 This is a schematic diagram of the iterative calculation process of the phase center measurement method of this application;

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

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

[0049] Fig.10 Simulate the amplitude pattern of the device under test for this application;

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

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

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

[0053] Fig.14 Schematic diagram of the phase change of the corresponding pointing antenna measured for this application;

[0054] Fig.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] Fig.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 described 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 only used to explain the technical solutions of the present application and are not used 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] The existing phase center measurement method has large errors when measuring antennas with large eccentricity. For example, the antenna installation position of vehicles, aircraft, and ships often deviates from the geometric center, and it is difficult to correct it through mobile measurement. The eccentricity distance may be several meters to tens of meters. At this time, the phase change of the measuring antenna itself cannot be ignored, because its phase pattern fluctuates with angle, and the difference is significant in wide-angle measurement.

[0060] Therefore, in order to overcome the above-mentioned defects, the present application provides a solution, by obtaining the actual measured phase of the antenna to be measured to calculate the initial phase center of the antenna to be measured, and correcting the actual measured phase of the antenna to be measured according to 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 subject of each embodiment of the present application may be a computing service device with data processing, network communication and program running functions, such as an electronic device capable of realizing the above functions, a phase center measurement device, etc. The following embodiments are described below taking the 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 Schematic diagram of the 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 preset reference point phase, 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 a cycle at a specific moment, that is, 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., the devices under test (such as aircraft, satellites, communication equipment, and various mobile devices) needs to be measured for wireless performance before they can be used outside the factory. For some high-precision measurement requirements (such as navigation and positioning), there must be an accurate reference point when solving. This reference point is the phase center of the antenna under test. The devices under test are equipped with antennas as key components for signal transmission and reception. Due to the physical characteristics of the antenna under test (i.e., the antenna installed on the device under test), its geometric center and phase center cannot be completely consistent. In addition, due to the errors caused by the processing and installation process, the phase center obtained by simulation will also deviate from the phase center of the actual object.

[0066] For ease of understanding, refer to Figure 2This invention is provided for illustration, but is not intended to limit the present application. Figure 2 This is a schematic diagram of spherical eccentricity measurement. Assuming that the antenna to be tested is far away from the center of the system, and the vertex of the measuring antenna generally always points to the center of the system, the angle of the measuring antenna pointing to the antenna to be tested will be very different at different measurement positions. Since the antenna to be tested 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 to be tested will be very different due to the change of 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 to be measured 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 to be measured. 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 beam width). 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 to be measured can be obtained.

[0068] Specifically, the 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 in 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 actual phase of the antenna to be measured at each measurement angle can be extracted.

[0070] In actual situations, the phase center of an antenna may change due to a variety of factors (such as antenna structure, feeding method, etc.). In order to find an approximate and stable phase center point, a spherical model can be constructed to simulate the phase distribution of the antenna. The spherical model can provide a continuous and smooth phase surface, making it easier to find the phase center. A spherical model can be constructed by selecting a preset position as the center of the sphere to simulate the spatial distribution of the phase response of the antenna to be tested.

[0071] Furthermore, by calculating the difference between the measured phase of the antenna under test at each measurement angle and the predicted value of the corresponding position of the spherical model, a series of residuals can be obtained. In order to quantify the size of the residuals, the sum of squares of all residuals is calculated, which reflects the overall degree of difference between the measured phase value and the predicted value of the spherical model. Among them, the position with the smallest sum of squares of residuals means that the phase distribution of this position is closest to the spherical model, so this position can be considered as the initial phase center of the antenna under test. This process improves the accuracy of data measurement.

[0072] For ease of 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 present application system. The phase pattern of the measuring antenna at its phase center can be measured in advance, and a certain angle phase is used 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 measured in the antenna coordinate system. The z-axis is the direction of the 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 according to different systems, such as keeping the DUT stationary and rotating the measurement antenna, or both the measurement antenna and the DUT can rotate. The core 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. Calculate and get the initial phase center P0 of the antenna to be tested. P0 is usually a three-dimensional space coordinate relative to the rotation center coordinate system of the device under test, which can be recorded as (Δx0, Δy0, Δz0). The basic calculation principle is to find a position in space so that the sum of the squares of the residuals from the position as the center of the sphere to the spherical surface of the space is minimized.

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

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

[0076] Step S30, calculating the current phase center of the antenna to be tested according to 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.

[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 can therefore 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, a mathematical model or algorithm (such as geometric analysis, statistical analysis, numerical optimization, etc.) can be used to process and analyze a large amount of phase data and extract the position information of the phase center. The specific choice depends on the type of antenna under test, the measurement conditions, and the required accuracy level. 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 the 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 measured 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 acquiring 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 then obtains 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-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 6 , the step S30 may include steps S301 to S303:

[0081] Step S301, calculating and obtaining 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 to be tested is compared with the initial phase center of the antenna to be tested to evaluate the position deviation between them, and the evaluation of the position deviation can be achieved 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 position of the phase center.

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

[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 real phase center. If the position deviation is less than the preset convergence accuracy, it is considered that the current phase center of the antenna to be tested is 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 constraint 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 tested and the initial phase center of the antenna to be tested;

[0088] 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 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 position deviation after iteration by iteratively calculating the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested;

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

[0091] It is understandable that, in the iterative calculation process, the position deviation between the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested is first calculated. If this position deviation is less than the preset convergence accuracy, it indicates that the current phase center of the antenna to be tested may be quite close to the real phase center. However, in order to ensure the stability and accuracy of the results, the iteration will not be stopped immediately, but the number of convergences will be incremented and the iterative calculation will continue.

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

[0093] Furthermore, when the updated position deviation is less than the preset convergence accuracy and the number of convergences meets the preset number of convergences, 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 may also include: when the updated position deviation is less than the preset convergence accuracy and the number of convergences meets the preset number of convergences, 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, then obtaining the phase center of the antenna to be tested based on the average value method or the function fitting method, combining 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.

[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 to be tested, the initial phase center of the antenna to be tested 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 less than the preset convergence accuracy. If the results of the pairwise comparison are 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 to be tested, 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 average method is to average all relevant phase center position estimates to obtain a comprehensive, averaged phase center position. The function fitting rule uses a mathematical function (such as a polynomial, exponential function, etc.) to fit all relevant phase center position estimates to obtain a smoother and more accurate phase center position estimate. The average method is simple and easy, but it may not fully capture the nonlinear changes in the phase center position. The function fitting rule can handle nonlinear data more flexibly, but it may require more computing resources and more complex mathematical models. Therefore, in practical applications, it is necessary to choose the most appropriate method according to the specific situation.

[0096] For ease of understanding, refer to Figure 7 This invention is intended to illustrate but not to limit the present 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 tested is used as the reference position, the steps for obtaining the phase center of the antenna to be tested 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 time, it is assumed that P0 is the actual phase center. After substituting the position into the measurement antenna phase, a set of measurement data with measurement antenna phase calibration is obtained. After correction, it is equivalent to considering the measurement antenna as a point source, and the phase at different angles is unchanged. In this way, the error in the actual measurement result caused by the change of the measurement antenna phase with the angle can be calibrated.

[0098] Step 2: According to the corrected phase Calculation is performed to obtain the current phase center P1 of the antenna to be tested, 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 tested, that is, ((Δx1-Δx0) / 2 , (Δy1-Δy0) / 2 , (Δz1-Δz0) / 2), if it exceeds the preset convergence accuracy range, then take P1 as the reference position and repeat steps 1 to 3 until the deviation from the previous position is less than the preset convergence accuracy. Among them, the judgment method and the preset convergence times can be selected according to the needs. For example, it can be stipulated that if the deviation is within the preset convergence accuracy for multiple times (twice, three times...), the phase center is considered to be accurate. This multiple convergence can prevent the calculation error caused by accidental factors. For example, if the number of convergences required to meet the accuracy is two times, the difference between Pn, P(n+1), and P(n+2) (where n represents the phase center value calculated for the nth time) must meet the deviation requirements at the same time, that is, these points all fall within a sphere with accuracy as the diameter. If it is a requirement for multiple convergences, the average of multiple convergence points can be calculated or the center coordinates can be calculated by other fitting methods as the final phase center of the antenna to be tested. At this time, the last calculation result is not directly used as the final result because the result of the iterative calculation may fluctuate within a range and is not monotonically accurate. Therefore, it is more reasonable to use the averaging or fitting method. 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 calculates the current phase center of the antenna to be tested based on the corrected phase, compares the position deviation between the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested, obtains the phase center of the antenna to be tested based on the position deviation and the preset convergence accuracy, and combines the preset convergence times, thereby improving the accuracy of the phase center measurement. If the position deviation is less than the preset convergence accuracy, iterative calculation is performed until the convergence times meet the requirements. When the updated position deviation meets the preset convergence accuracy and the convergence times meet the requirements, the stability of the results is confirmed by pairwise comparison, and finally the phase center of the antenna to be tested is determined by the average method or the function fitting method, which ensures the stability and reliability of the iterative results, and can more flexibly process the measurement data to obtain a more accurate phase center of the antenna to be tested.

[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-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. 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 at which the measuring antenna points to the initial phase center of the antenna to be measured at different measuring 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 according to 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: correcting the actual phase of the antenna to be measured according to the measured antenna phase change value to obtain a corrected phase.

[0106] It can be understood that the measured phase of the antenna to be measured is corrected by 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 tested can be written as follows:

[0108]

[0109] In the formula, Indicated in Δx, Δy, and Δz are the position 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, which represents the reference phase when the phase center of the DUT is located at the measurement rotation center. Here, the radiation of the DUT is considered to be an ideal spherical wave.

[0110] However, in reality, 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 (the current phase center of the antenna under test) P1(Δx1, Δy1, Δz1) of the device under test 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 in the following form:

[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 right parentheses 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 current calculation converges; 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)), should be less than the preset convergence accuracy d0. Then, the center of the sphere is fitted 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 understanding, reference is made to Figures 9 to 14 for illustration, but it does not limit this application. Fig. 9 This is the schematic diagram of the simulation model of this application. Fig.10 This is the amplitude pattern of the simulated device under test of this application. Fig.11 This is the phase pattern of the simulated device under test of this application. Fig.12 This is the phase pattern of the simulated measuring antenna of this application. Fig.13 This is the schematic diagram of the angle at which the measuring antenna points to the device under test of this application. Fig.14This is a schematic diagram of the corresponding directional phase change of the measurement antenna in this application. The phase center measurement method of this application can be further explained through a simulation example: the 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 under test installed) (i.e. the actual measured phase of the antenna under test). Since the phase center of the antenna under test is unknown at the beginning, it is impossible to directly compensate the measurement antenna phase, and it is necessary to use an iterative compensation method to make the phase center calculation result converge. Fig. 9 As shown, the phase center of the simulated antenna to be measured is placed at the position with coordinates (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: Fig.10 and Fig.11 As shown, the phase pattern of the measurement antenna is Fig.12 The initial phase center coordinates of the DUT calculated based on formula (1) are (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 (In this example Unchanged, so not shown ), the result is as follows Fig.13 As shown, the corresponding (like Fig.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 are required to meet the convergence conditions), the convergence accuracy is 0.01m, then the calculations of 2, 3, and 4 in the table meet the requirements, and the average coordinates (2.9275, 0, -0.0512) are calculated by averaging the calculations of 2, 3, and 4 times. The final phase center is (2.9275, 0, -0.0512), which deviates from the actual phase center (3, 0, 0) by 0.08876m. The deviation from the actual result of the measurement antenna phase calibration without using the method of the present invention is 0.1735m. It can be seen that the present 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 of the measuring antenna pointing 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 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 the 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 protection scope of the present application.

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

[0126] The initial phase calculation module 10 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 the preset reference point, and calculate the initial phase center of the antenna to be measured according to the measured phase of the antenna to be measured;

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

[0128] The phase center acquisition module 30 is used to calculate the current phase center of the antenna to be tested according to 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.

[0129] The phase center measurement device provided by the present application adopts the phase center measurement method in the above embodiment, which can solve the technical problem that the existing phase center measurement technology has a large error when measuring the phase center of an antenna with a large eccentricity. Compared with the prior art, the beneficial effects of the phase center measurement device provided by the present application are the same as the beneficial effects of the phase center measurement method provided by the above embodiment, and other technical features in the phase center measurement device are the same as the features disclosed in the above embodiment method, which will not be repeated 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 executable 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 Fig.16, which shows a schematic diagram of the structure of a phase center measurement device suitable for implementing the embodiment of the present application. The phase center measurement device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Desctions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Fig.16 The phase center measurement device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0132] like Fig.16 As shown, the phase center measurement device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the phase center measurement device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the phase center measurement device to communicate with other devices wirelessly or by wire 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 the systems shown. More or fewer systems can be implemented or have alternatively.

[0133] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a 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 through 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 by the present application adopts the phase center measurement method in the above embodiment, which can solve the technical problem that the existing phase center measurement technology has a large error when measuring the phase center of an antenna with a large eccentricity. Compared with the prior art, the beneficial effects of the phase center measurement device provided by the present application are the same as the beneficial effects of the phase center measurement method provided by the above embodiment, and the other technical features in the phase center measurement device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0135] It should be understood that the various parts disclosed in this application can be implemented by 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 is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

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

[0138] The computer-readable storage medium provided in the present 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 of the above. 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 of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination 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 of the above.

[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 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.

[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 separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of 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., via the Internet using an Internet service provider).

[0142] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the 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 sequence different from 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 with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0143] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0144] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned phase center measurement method, and can solve the technical problem that the existing phase center measurement technology has a large error when measuring the phase center of an antenna with a large eccentricity. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the phase center measurement method provided by the above-mentioned embodiment, and will not be repeated here.

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

[0146] The computer program product provided by the present application can solve the technical problem that the existing phase center measurement technology has a large error when measuring the phase center of an antenna with a large eccentricity. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the phase center measurement method provided by the above embodiment, and will not be repeated here.

[0147] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied 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 tested based on the initial phase center of the antenna to be tested to obtain a corrected phase; 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.

2. The phase center measurement method according to claim 1, characterized in that: The step of calculating the current phase center of the antenna to be tested according to 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: According to the corrected phase, the current phase center of the antenna to be tested is calculated; 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 in combination with the preset convergence number.

3. The phase center measurement method according to claim 2, characterized in that: The step of obtaining the phase center of the antenna to be measured according to the position deviation and the preset convergence accuracy and 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 tested and the initial phase center of the antenna to be tested; 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 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 position deviation after iteration by iteratively calculating the current phase center of the antenna to be tested and the initial phase center of the antenna to be tested; When the position deviation after iteration is less than the preset convergence accuracy, the phase center of the antenna to be measured is obtained based on the preset convergence number.

4. The phase center measurement method according to claim 3, characterized in that: When the updated position deviation is less than the preset convergence accuracy and the convergence number meets the preset convergence number, 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 comprises: When the updated position deviation is less than the preset convergence accuracy and the convergence number meets the preset convergence number, 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 are compared in pairs to obtain a comparison result; If the comparison result is less than the preset convergence accuracy, the phase center of the antenna to be tested is obtained based on the average value method or the function fitting method, combining 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.

5. The phase center measurement method according to any one of claims 1 to 4, characterized in that: The step of correcting the measured phase of the antenna to be tested based on the initial phase center of the antenna to be tested to obtain the 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 measuring positions; Querying a preset phase change value database for a measured antenna phase change value corresponding to the angle; The actual measured phase of the antenna to be measured is corrected according to the measured antenna phase change value to obtain a corrected phase.

6. The phase center measurement method according to any one of claims 1 to 4, characterized in that: 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 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 from the measured phase of the antenna to be tested to the spherical model is calculated to obtain the residual square sum; The preset position corresponding to the minimum value in the residual square sum is selected as the initial phase center of the antenna to be tested.

7. 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 calculate the initial phase center of the antenna to be measured according to the measured phase of the antenna to be measured; A phase correction module, used to correct the measured phase of the antenna to be tested based on the initial phase center of the antenna to be tested to obtain a corrected phase; The phase center acquisition module is used to calculate the current phase center of the antenna to be tested according to 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.

8. A phase center measurement device, characterized in that: The phase center measurement device comprises: 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 6 is implemented.

9. A storage medium, characterized in that: The storage medium stores a phase center measurement program, and when the phase center measurement program is executed by the processor, the phase center measurement method according to any one of claims 1 to 6 is implemented.

10. 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 6 is implemented.

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