Method and device for determining antenna phase center through near field measurement and electronic equipment

Abstract

The invention relates to the technical field of wireless communication, in particular to a method and device for determining the phase center of an antenna through near-field measurement and electronic equipment, and the method comprises the steps: collecting near-field data of a spherical test field, and calculating a phase value corresponding to each test point of the spherical test field according to the near-field data; and establishing a target equation set based on the phase value corresponding to each test point, and solving the target equation set by using a preset Heiplug determinant to obtain the coordinates of the phase center of the antenna. Therefore, the problems that in the prior art, an antenna phase center determining method is complex in algorithm, long in research, development and verification period, inaccurate in phase center searching and the like are solved, the scheme principle is simple, calculation is simple, a developed program is convenient to debug, calculation time is sharply shortened, working efficiency is improved, long-term and stable development of the automobile industry can be assisted, and the method is suitable for popularization and application. The economic benefit and the social benefit are improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a method, device and electronic equipment for determining an antenna phase center through near-field measurement. Background Art

[0002] Antennas, as core components of wireless communication systems, are as important as the human eyes and ears, serving as the crucial bridge between information transmission and reception. The creation and development of any product typically follows a comprehensive process, from conception, requirements analysis, design planning, manufacturing implementation, verification testing, and lifecycle management. Antennas, as standalone products or as part of product components, follow this same path. During antenna verification, multiple dimensions, including electrical performance, structural design, manufacturing processes, material selection, reliability assessment, and maintainability considerations, must be rigorously scrutinized to ensure they meet established requirements.

[0003] With the booming automotive industry and people's evolving pursuit of quality of life, traditional vehicles are no longer able to meet diverse demands. Innovative concepts such as intelligence, connectivity, and autonomous driving are becoming the new trends in the automotive industry's transformation. The rapid development of intelligent, connected vehicles relies heavily on the strong support of wireless communication technologies. Antennas are essential components for enabling vehicle-to-everything (V2X), 4G / 5G mobile communications, and global navigation satellite systems (GNSS).

[0004] It's particularly noteworthy that the performance verification of smart connected car antennas carries a greater responsibility and mission than other product antennas. While poor mobile phone antenna performance may only affect call quality, the performance of smart connected car antennas directly impacts driving safety and the safety of passengers and property. Therefore, systematic verification of automotive antennas, particularly their electrical performance and reliability, is extremely urgent and important.

[0005] In the past, antennas were often viewed as simple accessories, purchased externally and integrated into products. However, with the increasing diversity and complexity of wireless communication products, this simplistic approach has proven unworkable, and even leading global communication equipment and terminal suppliers have experienced setbacks. Today, the industry generally recognizes that any product involving wireless communication must incorporate antennas into the overall system design and verification to ensure overall system performance.

[0006] The verification of antenna performance covers a wide range of aspects. Among them, directly testing and verifying the antenna performance on the entire product (such as an automobile) is a crucial step. The radiation pattern of the antenna (especially the far-field radiation pattern) and gain are important indicators for measuring communication distance and communication quality, and are crucial for network planning. However, since the size of the automobile is much larger than the working wavelength of the antenna, direct far-field testing is often restricted by practical conditions and is unrealistic. Therefore, using the near-field to far-field extrapolation technology of the antenna, that is, by measuring the near-field performance (radiation pattern and gain) of the antenna and calculating the far-field performance with the help of software, has become an effective way to solve this problem.

[0007] However, the prerequisite for directly inferring the far-field performance from the near-field measurement data is to accurately determine the phase center of the antenna. The phase center is a virtual point of the antenna. Assuming that this point is the center of the sphere of the radiation far-field spherical surface, the phase of a given field component on the radiation spherical surface should remain consistent. This is the basis for near-to-far-field extrapolation. In actual automobile antenna measurements, due to test condition limitations, the antenna phase center often cannot be accurately aligned with the center of the microwave anechoic chamber test turntable, resulting in a phase center offset problem in the near-field measurement results. If this offset is not accurately identified and corrected, the far-field radiation pattern obtained by near-to-far-field extrapolation will deviate from the actual situation, making the measurement work meaningless. Therefore, how to quickly and accurately determine the antenna phase center from the near-field test data has become a key problem to be solved urgently in the field of automotive wireless communication. Summary of the Invention

[0008] The present invention provides a method, device, and electronic device for determining the antenna phase center through near-field measurement to solve the problems in the prior art that the algorithm for determining the antenna phase center is complex, the research and development and verification cycle is long, and the search for the phase center is inaccurate.

[0009] The first aspect of the embodiments of the present invention provides a method for determining the antenna phase center through near-field measurement, including the following steps: collecting near-field data of a spherical test field, and calculating the phase value corresponding to each test point of the spherical test field according to the near-field data; establishing a target equation set based on the phase value corresponding to each test point, and solving the target equation set using a preset Hessian determinant to obtain the coordinates of the antenna phase center.

[0010] Optionally, the method for determining the antenna phase center through near-field measurement further includes: determining an initial search point of the spherical test field, searching along a first direction based on the initial search point, and determining whether there is a decreasing trend in the measure of error when advancing in the first direction; if there is such a decreasing trend in the measure of error when advancing in the first direction, continue to search along the first direction until the measure of error is less than a preset expected value to obtain the coordinates of the antenna phase center; otherwise, adjust the first direction to a second direction or a third direction for searching until the measure of error is less than the preset expected value to obtain the coordinates of the antenna phase center.

[0011] Optionally, the spherical test field includes first to third test points, and the target equations are:

[0012]

[0013] where, (X A , Y A , Z A ) are the rectangular coordinates of the first test point A, (X B , Y B , Z B ) are the rectangular coordinates of the second test point B, (X C , Y C , Z C ) are the rectangular coordinates of the third test point C, P A is the phase value measured at the first test point A, P B is the phase value measured at the second test point B, P C is the phase value measured at the third test point C, u is the instability, λ is the wavelength, and (X P , Y P , Z P ) are the coordinates of the phase center P point.

[0014] Optionally, the preset Hessian determinant is:

[0015]

[0016] where the subscript i corresponds to the second test point B and the third test point C of the equations, the subscript 0 corresponds to the second test point A of the equations, (x, y, z) are the coordinates of the phase center of the antenna, (x[[ID= / / translate content here]] i , y i , z i ) are the corresponding rectangular coordinate positions of each test point, and (x0, y0, z0) are the initial center rectangular coordinate positions.

[0017] In a second aspect of the embodiments of the present invention, a device for determining the phase center of an antenna through near-field measurement is provided, including: an acquisition module, configured to acquire near-field data of a spherical test field and calculate a phase value corresponding to each test point of the spherical test field according to the near-field data; a calculation module, configured to establish a target equation set based on the phase values corresponding to each test point and solve the target equation set by using a preset Hessian determinant to obtain the coordinates of the phase center of the antenna.

[0018] Optionally, in some embodiments, the above device for determining the phase center of an antenna through near-field measurement further includes: a judgment module, configured to determine an initial search point of the spherical test field, search along a first direction based on the initial search point, and judge whether there is a decreasing trend in the measure of error when advancing in the first direction; a search module, configured to, if there is a decreasing trend in the measure of error when advancing in the first direction, continue to search along the first direction until the measure of error is less than a preset expected value to obtain the coordinates of the phase center of the antenna, otherwise, adjust the first direction to a second direction or a third direction for searching until the measure of error is less than the preset expected value to obtain the coordinates of the phase center of the antenna.

[0019] Optionally, in some embodiments, the target equation set is:

[0020]

[0021] wherein, (X A , Y A , Z A ) are the rectangular coordinates of the first test point A, (X B , Y B , Z B ) are the rectangular coordinates of the second test point B, (X C , Y C , Z C ) are the rectangular coordinates of the third test point C, P A is the phase value measured at the first test point A, P B is the phase value measured at the second test point B, P C is the phase value measured at the third test point C, u is the instability, λ is the wavelength, and (X P , Y P , Z P ) are the coordinates of the phase center P point.

[0022] Optionally, in some embodiments, the preset Hessian determinant is:

[0023]

[0024]

[0025] Among them, the subscript i corresponds to the second test point B and the third test point C of the system of equations, the subscript 0 corresponds to the second test point A of the system of equations, (x, y, z) are the coordinates of the phase center of the antenna, and (x i , y i , z i ) are the rectangular coordinate positions corresponding to each test point, and (x0, y0, z0) are the initial central rectangular coordinate positions.

[0026] An embodiment of the third aspect of the present invention provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement the method for determining the phase center of an antenna through near-field measurement as described in the above embodiment.

[0027] An embodiment of the fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, and the program is executed by a processor to be used to implement the method for determining the phase center of an antenna through near-field measurement as described in the above embodiment.

[0028] In the above implementation manner, the near-field data of the spherical test field is collected, and the phase value corresponding to each test point of the spherical test field is calculated according to the near-field data; a target system of equations is established based on the phase value corresponding to each test point, and the target system of equations is solved by using a preset Hessian determinant to obtain the coordinates of the phase center of the antenna. Thus, the problems in the prior art that the algorithm for determining the phase center of an antenna is complex, the research and development and verification cycles are long, and the search for the phase center is inaccurate are solved. The principle of the solution is simple, the calculation is simple, the developed program is easy to debug, the calculation time is sharply reduced, the work efficiency is improved, which can contribute to the long-term and stable development of the automotive industry and improve economic and social benefits.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, where:

[0031] Figure 1 is a flowchart of a method for determining the phase center of an antenna through near-field measurement according to an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of a spherical test field according to an embodiment of the present invention;

[0033] Figure 3Schematic diagram of a test file according to an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of an antenna test system according to an embodiment of the present invention;

[0035] Figure 5 Schematic diagram of near - field data and related parameters according to an embodiment of the present invention;

[0036] Figure 6 Schematic diagram of a near - field standard file according to an embodiment of the present invention;

[0037] Figure 7 Schematic diagram of near - field file selection according to an embodiment of the present invention;

[0038] Figure 8 Schematic diagram of antenna testing according to an embodiment of the present invention;

[0039] Figure 9 Schematic diagram of test results according to an embodiment of the present invention;

[0040] Figure 10 Schematic diagram of search results for the antenna phase center according to another embodiment of the present invention;

[0041] Figure 11 Example diagram of a device for determining the antenna phase center through near - field measurement according to an embodiment of the present invention;

[0042] Figure 12 Schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed implementation manners

[0043] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] The method, apparatus, and electronic device for determining the antenna phase center through near-field measurement according to the embodiments of the present invention will be described below with reference to the accompanying drawings. Aiming at the problems in the prior art mentioned in the above background art that the algorithm for determining the antenna phase center is complex, the research and development and verification cycles are long, and the search for the phase center is inaccurate, the present invention provides a method for determining the antenna phase center through near-field measurement. In this method, the near-field data of the spherical test field is collected, and the phase value corresponding to each test point of the spherical test field is calculated according to the near-field data; a target equation set is established based on the phase value corresponding to each test point, and the preset Hessian determinant is used to solve the target equation set to obtain the coordinates of the antenna phase center. Thus, the problems in the prior art that the algorithm for determining the antenna phase center is complex, the research and development and verification cycles are long, and the search for the phase center is inaccurate are solved. The principle of the solution is simple, the calculation is simple, the developed program is easy to debug, the calculation time is sharply reduced, and the work efficiency is improved, which can contribute to the long-term and stable development of the automotive industry and improve economic and social benefits.

[0045] In the prior art, the antenna phase center is determined by a particle swarm optimization algorithm. However, the disadvantages of this method are mainly in the following aspects:

[0046] (1) The algorithm is complex, resulting in long research and development and verification cycles, which are time-consuming and laborious.

[0047] (2) For the rapidly developing automotive industry, this algorithm is not adaptable.

[0048] In the prior art, the antenna phase center can be determined by a traversal search method. The traversal search method assumes that the phase center of the antenna can be at any point in the test area, and then the situations of each point are compared to determine which point is the phase center of the antenna. However, the disadvantages of this method are mainly in the following aspects:

[0049] (1) Since it is necessary to exhaustively search every point in the test area and then determine which point conforms to the theory, the search efficiency is low.

[0050] (2) To improve the search efficiency, this method usually adopts a two-step search method: In the first step, the test area is searched with a relatively large step length (such as 1 cm) to determine a general range where the phase center is located. In the second step, based on the general range roughly searched in the first step, the search step length is changed to 1 mm for precise search. The search time is relatively long. Usually, for one frequency point, it takes about 7 minutes to search for the phase center. For automotive antennas that usually have multiple antennas and dozens or hundreds of working frequency points, the efficiency is very low.

[0051] Specifically, [[ID=********]] Figure 1 FIG. is a schematic flowchart of a method for determining an antenna phase center through near-field measurement provided by an embodiment of the present invention.

[0052] As Figure 1 shown, the method for determining the antenna phase center through near-field measurement includes the following steps:

[0053] In step S101, the near-field data of the spherical test field is collected, and the phase value corresponding to each test point of the spherical test field is calculated according to the near-field data.

[0054] In step S102, a target equation set is established based on the phase value corresponding to each test point, and the target equation set is solved by using a preset Hessian determinant to obtain the coordinates of the antenna phase center.

[0055] Among them, the test points include the first test point A, the second test point B, and the third test point C.

[0056] Optionally, in some embodiments, the spherical test field includes the first to third test points, and the target equation set is:

[0057]

[0058] Among them, (X A , Y A , Z A ) are the rectangular coordinates of the first test point A, (X B , Y B , Z B ) are the rectangular coordinates of the second test point B, (X C , Y C , Z C ) are the rectangular coordinates of the third test point C, P A is the phase value measured at the first test point A, P B is the phase value measured at the second test point B, P C is the phase value measured at the third test point C, u is the instability, λ is the wavelength, (X P , Y P , Z P ) are the coordinates of the phase center P point.

[0059] Optionally, in some embodiments, the preset Hessian determinant is:

[0060]

[0061]

[0062] Among them, the subscript i corresponds to the second test point B and the third test point C of the equation set, the subscript 0 corresponds to the second test point A of the equation set, (x, y, z) are the coordinates of the antenna phase center, (x i , y i , z i) are the rectangular coordinate positions corresponding to each test point, and (x0, y0, z0) is the initial central rectangular coordinate position.

[0063] Assume that the near-field test data is obtained on the spherical surface O, the actual phase center is offset from the center O of the sphere (the test center, the center of the test turntable) to point P, and PA is a certain component (E θ or ) corresponding to the maximum value direction, points B and C are test points next to point A, and the spherical test field is as Figure 2 shown.

[0064] If P and O coincide, then |PA| = |PB| = |PC|; when the phase center deviates from the center of the sphere, P and O do not coincide, and this equation may no longer hold. When the phases of points B, C, and A are inconsistent, that is, the distances from point P to points B and C are different from the distance to point A, it is easy to list the target equation set at this time.

[0065] The target equation set can be solved by the analytical method or by the computer numerical solution method. Computer solution algorithms include, for example, the bisection method, the ordinary iteration method, the Aitken acceleration method, the Newton iteration method, the secant method, etc.

[0066] In order to improve the accuracy and stability of the solution, the Hessian determinant (matrix) may be used. According to the above target equation set, the Hessian determinant may be used during the solution process to obtain the coordinates of the phase center of the antenna.

[0067] To enable those skilled in the art to further understand the method for determining the antenna phase center of the embodiments of the present invention, the following will be elaborated in detail in conjunction with specific embodiments, as Figures 3 - 9 shown.

[0068] The sample program of the present invention consists of two files, including the main program NearField2Far and the dynamic link library center_map_transfer.dll, as Figure 3 shown.

[0069] Double-click the main program to start the sample software of the present invention: click the "New" sub-menu in the "File" menu, or the "New" button on the toolbar to start a new calculation instance, as Figure 4 and 5 shown.

[0070] If the file name of the near-field test (simulation) data and other parameters are the same as the default values, directly click the "OK" button to start the calculation. If you need to change the file, click the "Open" button next to the file name. If the near-field file and the main program are in the same folder, you can directly change the file name in the edit box, as Figure 6 shown.

[0071] This program can open near-field files located anywhere on this computer (and of course it also supports network connection). You only need to click the drop-down button of the drop-down list box in the above figure to make a selection. For example, Figure 7 as shown.

[0072] After determining the near-field input file and setting the parameters required on the interface, click the "OK" button to start the calculation. As Figure 8 shown, after the calculation is completed, the searched phase center (rectangular coordinates) is directly output on the main interface. As Figure 9 shown, for the position coordinates (-0.001, 2.339, 0.120) shown in the figure, compared with the actual coordinates (0, 2.34, 0.12), the error has been accurate to the millimeter level.

[0073] Therefore, compared with the solution in the prior art, the specific implementation of the present invention is more difficult, the particle swarm algorithm is not easy to popularize, the operation is extremely inconvenient, the input file can only be in the current folder, and the near-field data file in other places cannot be opened.

[0074] Optionally, in some embodiments, it further includes: determining an initial search point of the spherical test field, searching along a first direction based on the initial search point, and determining whether there is a decreasing trend in the measure of the error when advancing in the first direction; if there is a decreasing trend in the measure of the error when advancing in the first direction, continue to search along the first direction until the measure of the error is less than a preset expected value to obtain the coordinates of the antenna phase center; otherwise, adjust the first direction to a second direction or a third direction to search until the measure of the error is less than the preset expected value to obtain the coordinates of the antenna phase center.

[0075] In the process of solving the phase center, a non-linear equation solving method can be used, or a genetic algorithm (or generation optimization algorithm) can be considered. Compared with the comparative solution, the search efficiency can still be improved and the search time can be shortened.

[0076] Specifically, it is assumed that starting from an initial search point (x0, y0, z0) within the test area, advancing along a certain direction of the x-axis (the first direction) (such as the positive direction of the x-axis);

[0077] At this time, if the measure of the error delta_min decreases, continue to search along the first direction, where delta_min is the absolute value of the difference between the left and right sides of the target equation system;

[0078] Otherwise, it can be considered to change the value of the second direction or the third direction (y-axis (or z-axis)) for trial until the measure of the error is less than the preset expected value;

[0079] When changing the y value, if delta_min (the measure of the error) decreases, continue to search along the second direction;

[0080] Otherwise, it is possible to consider changing the value of z (or x) and making attempts until the measure of the error is less than a preset expected value;

[0081] When changing the value of z, if delta_min (the measure of the error) decreases, continue the search along the third direction;

[0082] Otherwise, it is possible to consider changing the value of x (or y) and making attempts until the measure of the error is less than a preset expected value;

[0083] At this time, (x, y, z) are the coordinates of the phase center.

[0084] Or after one cycle, if delta_min no longer decreases, the coordinates of the antenna phase center are obtained.

[0085] It should be noted that during the search process, the rectangular coordinates (x, y, z) can also be replaced by spherical coordinates (r, θ, φ).

[0086] The code example (C language) of the specific search process is as follows:

[0087]

[0088]

[0089] Among them, the integer variable dir represents the search direction (path), (xP, yP, zP) represent the coordinates of the phase center point P, the integer variable times records the number of searches, the double variables xx, yy, zz save the best values currently searched, and the label begin records the true start of the algorithm.

[0090] The actual program running effect is as Figure 10 shown: It can be seen that the actual search time is about 0.05 seconds, far less than about 7 minutes of the comparison scheme. The search accuracy is comparable to the time used in the previous example of solving the equations in the present invention. At the same time, this program exemplifies 6 search paths to ensure the stability of the search results.

[0091] Among them, it should be noted that the calculation method of the calculation system uncertainty u value is as follows:

[0092] The code for this calculation runs properly in the matlab2012 environment. In actual use, only the sample values measured (simulated) need to be used to replace the elements in the vector G, and the actual technical parameters of the laboratory are used to replace the previous preset values. If there are differences in the visual effect of the results from the above figure, the user can manually adjust the size of the result window.

[0093] The analysis of the uncertainty value u is as follows, where G is the sampled data, which can be changed according to the actual sampling results.

[0094]

[0095]

[0096]

[0097]

[0098]

[0099] According to the method for determining the antenna phase center through near-field measurement proposed in the embodiment of the present invention, the near-field data of the spherical test field is collected, and the phase value corresponding to each test point of the spherical test field is calculated according to the near-field data; a target equation set is established based on the phase value corresponding to each test point, and the preset Hessian determinant is used to solve the target equation set to obtain the coordinates of the antenna phase center. Thus, the problems in the prior art that the algorithm for determining the antenna phase center is complex, the research and development and verification cycles are long, and the search for the phase center is inaccurate are solved. The principle of the solution is simple, the calculation is simple, the developed program is easy to debug, the calculation time is sharply reduced, and the work efficiency is improved, which can contribute to the long-term and stable development of the automotive industry and improve economic and social benefits.

[0100] Next, a device for determining the antenna phase center through near-field measurement proposed in the embodiment of the present invention will be described with reference to the accompanying drawings.

[0101] Figure 11 is a block diagram of the device for determining the antenna phase center through near-field measurement according to the embodiment of the present invention.

[0102] As Figure 11 shown, the device 10 for determining the antenna phase center through near-field measurement includes: a collection module 100 and a calculation module 200.

[0103] Among them, the collection module 100 is used to collect the near-field data of the spherical test field and calculate the phase value corresponding to each test point of the spherical test field according to the near-field data; the calculation module 200 is used to establish a target equation set based on the phase value corresponding to each test point and solve the target equation set using the preset Hessian determinant to obtain the coordinates of the antenna phase center.

[0104] Optionally, in some embodiments, the apparatus 10 for determining the antenna phase center through near-field measurement further includes: a judgment module, configured to determine an initial search point of the spherical test field, search along a first direction based on the initial search point, and judge whether there is a decreasing trend in the measure of the error when advancing in the first direction; a search module, configured to, if there is a decreasing trend in the measure of the error when advancing in the first direction, continue to search along the first direction until the measure of the error is less than a preset expected value to obtain the coordinates of the antenna phase center; otherwise, adjust the first direction to a second direction or a third direction for searching until the measure of the error is less than the preset expected value to obtain the coordinates of the antenna phase center.

[0105] Optionally, in some embodiments, the target equation set is:

[0106]

[0107] where (X A , Y A , Z A ) are the rectangular coordinates of the first test point A, (X B , Y B , Z B ) are the rectangular coordinates of the second test point B, (X C , Y C , Z C ) are the rectangular coordinates of the third test point C, P A is the phase value measured at the first test point A, P B is the phase value measured at the second test point B, P C is the phase value measured at the third test point C, u is the instability, λ is the wavelength, and (X P , Y P , Z P ) are the coordinates of the phase center P point.

[0108] Optionally, in some embodiments, the preset Hessian determinant is:

[0109]

[0110] where the subscript i corresponds to the second test point B and the third test point C of the equation set, the subscript 0 corresponds to the second test point A of the equation set, (x, y, z) are the coordinates of the phase center of the antenna, (x i , y i , z i ) are the corresponding rectangular coordinate positions of each test point, and (x₀, y₀, z₀) are the initial center rectangular coordinate positions.

[0111] It should be noted that the foregoing explanation of the method embodiments for determining the antenna phase center through near-field measurement is also applicable to the apparatus for determining the antenna phase center through near-field measurement in this embodiment, and will not be elaborated here.

[0112] The apparatus for determining the antenna phase center through near-field measurement according to the embodiments of the present invention collects near-field data of a spherical test field, and calculates the phase value corresponding to each test point of the spherical test field based on the near-field data; establishes a target equation set based on the phase value corresponding to each test point, and solves the target equation set by using a preset Hessian determinant to obtain the coordinates of the phase center of the antenna. Thus, it solves the problems in the prior art that the algorithm for determining the antenna phase center is complex, the research and development and verification cycles are long, and the search for the phase center is inaccurate, etc. The principle of the solution is simple, the calculation is simple, the developed program is easy to debug, the calculation time is sharply reduced, and the work efficiency is improved, which can contribute to the long-term and stable development of the automotive industry and improve economic and social benefits.

[0113] Figure 12 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. The electronic device may include:

[0114] A memory 1201, a processor 1202, and a computer program stored on the memory 1201 and executable on the processor 1202.

[0115] When the processor 1202 executes the program, it implements the method for determining the antenna phase center through near-field measurement provided in the foregoing embodiment.

[0116] Furthermore, the electronic device further includes:

[0117] A communication interface 1203 for communication between the memory 1201 and the processor 1202.

[0118] The memory 1201 is used to store a computer program executable on the processor 1202.

[0119] The memory 1201 may include a high-speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

[0120] If the memory 1201, the processor 1202, and the communication interface 1203 are implemented independently, the communication interface 1203, the memory 1201, and the processor 1202 can be interconnected through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 12 only a thick line is used to represent it in Figure 12 , but it does not mean that there is only one bus or one type of bus.

[0121] Optionally, in a specific implementation, if the memory 1201, the processor 1202, and the communication interface 1203 are integrated on a chip, the memory 1201, the processor 1202, and the communication interface 1203 can communicate with each other through an internal interface.

[0122] The processor 1202 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0123] The embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the method for determining the antenna phase center through near-field measurement as described above is implemented.

[0124] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or N embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0125] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0126] Any process or method description represented in a flowchart or described otherwise herein may be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed in a substantially simultaneous manner or in an order opposite to that shown or discussed, according to the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0127] The logic and / or steps represented in a flowchart or described otherwise herein, for example, may be considered as a sequenced list of executable instructions for implementing a logical function and may be specifically implemented in any computer-readable storage medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device. For the purposes of this specification, a "computer-readable storage medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable storage medium include the following: an electrical connection portion (electronic device) having one or more wirings, a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable storage medium can even be paper or other suitable media on which the program can be printed, as the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or other appropriate processing as necessary, and then stored in a computer memory.

[0128] It should be understood that each part of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0129] Those of ordinary skill in the art can understand that all or part of the steps carried by the method of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0130] In addition, each functional unit in various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. When the above integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0131] The above-mentioned computer-readable storage medium can be a read-only memory, a magnetic disk or an optical disc, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for determining the phase center of an antenna through near-field measurement, characterized in that, It includes the following steps: Collect near-field data of the spherical test field, and calculate the phase value corresponding to each test point of the spherical test field according to the near-field data; Based on the phase values corresponding to each test point, establish a target equation set, and solve the target equation set by using a preset Hessian determinant to obtain the coordinates of the phase center of the antenna.

2. The method for determining the antenna phase center by near-field measurement according to claim 1, wherein It also includes: Determine the initial search point of the spherical test field, search along the first direction based on the initial search point, and judge whether there is a decreasing trend in the measure of the error when advancing in the first direction; If there is the decreasing trend in the measure of the error when advancing in the first direction, continue to search along the first direction until the measure of the error is less than a preset expected value to obtain the coordinates of the antenna phase center; otherwise, adjust the first direction to the second direction or the third direction for searching until the measure of the error is less than the preset expected value to obtain the coordinates of the antenna phase center.

3. The method for determining the antenna phase center through near-field measurement according to claim 1, characterized in that, The spherical test field includes the first to third test points, and the target equation set is: Among them, (X A , Y A , Z A ) are the rectangular coordinates of the first test point A, (X B , Y B , Z B ) are the rectangular coordinates of the second test point B, (X C , Y C , Z C ) are the rectangular coordinates of the third test point C, P A is the phase value measured at the first test point A, P B is the phase value measured at the second test point B, P C is the phase value measured at the third test point C, u is the instability, λ is the wavelength, (X P , Y P , Z P ) are the coordinates of the phase center P point.

4. The method for determining the antenna phase center by near-field measurement according to claim 1, characterized in that, The preset Hessian determinant is: where the subscript i corresponds to the second test point B and the third test point C of the system of equations, the subscript 0 corresponds to the second test point A of the system of equations, (x, y, z) are the coordinates of the phase center of the antenna, (x i , y i , z i ) are the rectangular coordinate positions corresponding to each test point, and (x0, y0, z0) are the initial central rectangular coordinate positions.

5. An apparatus for determining the phase center of an antenna by near-field measurement, characterized in that, It includes: A collection module, configured to collect near-field data of the spherical test field, and calculate the phase value corresponding to each test point of the spherical test field according to the near-field data; A calculation module, configured to establish a target equation set based on the phase values corresponding to each test point, and solve the target equation set by using a preset Hessian determinant to obtain the coordinates of the phase center of the antenna.

6. The apparatus for determining the antenna phase center by near-field measurement according to claim 5, characterized in that It also includes: A judgment module, configured to determine the initial search point of the spherical test field, search along the first direction based on the initial search point, and judge whether there is a decreasing trend in the measure of the error when advancing in the first direction; A search module, configured to if there is the decreasing trend in the measure of the error when advancing in the first direction, continue to search along the first direction until the measure of the error is less than a preset expected value to obtain the coordinates of the antenna phase center; otherwise, adjust the first direction to the second direction or the third direction for searching until the measure of the error is less than the preset expected value to obtain the coordinates of the antenna phase center.

7. The apparatus for determining the antenna phase center by near-field measurement according to claim 5, characterized in that The target equation set is: Among them, (X A , Y A , Z A ) are the rectangular coordinates of the first test point A, (X B , Y B , Z B ) are the rectangular coordinates of the second test point B, (X C , Y C , Z C ) are the rectangular coordinates of the third test point C, P A is the phase value measured at the first test point A, P B is the phase value measured at the second test point B, P C is the phase value measured at the third test point C, u is the instability, λ is the wavelength, (X P , Y P , Z P ) are the coordinates of the phase center P point.

8. The apparatus for determining the antenna phase center by near-field measurement according to claim 5, characterized in that The preset Hessian determinant is: where the subscript i corresponds to the second test point B and the third test point C of the system of equations, the subscript 0 corresponds to the second test point A of the system of equations, (x, y, z) are the coordinates of the phase center of the antenna, (x i , y i , z i ) are the rectangular coordinate positions corresponding to each test point, and (x0, y0, z0) are the initial central rectangular coordinate positions.

9. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor executes the program to implement the method for determining the antenna phase center through near-field measurement as described in any one of claims 1-4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to be used for implementing the method for determining the antenna phase center through near-field measurement as described in any one of claims 1-4.

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