CN114070428B - Method and system for testing active performance of finished automobile antenna - Google Patents
Method and system for testing active performance of finished automobile antenna Download PDFInfo
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- CN114070428B CN114070428B CN202210025215.3A CN202210025215A CN114070428B CN 114070428 B CN114070428 B CN 114070428B CN 202210025215 A CN202210025215 A CN 202210025215A CN 114070428 B CN114070428 B CN 114070428B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/102—Power radiated at antenna
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3822—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving specially adapted for use in vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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Abstract
The application discloses a method for testing the active performance of an entire vehicle antenna, which comprises the following steps: around the vehicle to be measured, along a radius Rk(k = 1-N, N is not less than 3) measuring radiation power of at least one part of the spherical surface; obtaining the phase center of the vehicle radiation antenna to be tested according to the test point positions and the test power values on the spherical surfaces with at least 3 different radiuses; calculating the distance R from the phase center according to the position of the phase center, the position of the test point and the test power valuekThe radiation power calibration value of each point on the N spherical surfaces; calculating a far-field pattern from the radiated power calibration value. The application also provides a test system for realizing the method. The problem of whole car antenna far field test inconvenience, antenna position have the influence to the radiation field is solved in this application.
Description
Technical Field
The application relates to the technical field of antennas, in particular to an active performance testing method and system for a whole vehicle antenna.
Background
The intelligent networking is one of the important future development directions of the automobile. Vehicle-mounted applications such as advanced autopilot, remote control, sensor sharing, augmented virtual reality, OTA upgrade, internet of vehicles security early warning, etc., depend on the reliability, immediacy, and high capacity of vehicle-to-vehicle, vehicle-to-network communications. The performance test of the wireless communication of the whole automobile is an indispensable means for guaranteeing the performance and the reliability of the wireless communication of the automobile and is an indispensable ring in the basic scientific research of intelligent networked automobile development. How to quantitatively and accurately evaluate the communication performance between an automobile and the outside is a key for automobile quality verification and quality optimization, and is a fundamental problem related to the safety of the whole automobile, but the basic theory, the test method and the error analysis of the wireless performance test of the whole automobile are incomplete, and the test method and the system device with the active performance of the whole automobile antenna are blank at home and abroad.
The active performance test of the whole vehicle antenna is generally carried out under the far field condition, the field length meeting the far field condition is more than 40m, and the antenna and the vehicle body are combined into a whole, but the antenna radiation center is not the vehicle body center, and the antenna radiation is influenced by the vehicle body material and shape. For example, the antenna being located at the ear, the head, etc. may cause serious eccentricity problems to affect far field performance indicators.
Disclosure of Invention
The application provides a method and a system for testing the active performance of a whole vehicle antenna, which solve the problems that the far-field test of the whole vehicle antenna is inconvenient and the position of the antenna has influence on a radiation field.
In a first aspect, an embodiment of the present application provides a method for testing active performance of an entire vehicle antenna, including the following steps:
around the vehicle to be measured, along a radius Rk(k = 1-N, N is not less than 3) measuring radiation power of at least one part of the spherical surface;
obtaining the phase center of the vehicle radiation antenna to be tested according to the test point positions and the test power values on the spherical surfaces with at least 3 different radiuses;
calculating the distance R from the phase center according to the position of the phase center, the position of the test point and the test power valuekThe radiation power calibration value of each point on the N spherical surfaces;
calculating a far-field pattern from the radiated power calibration value.
Preferably, the step of obtaining the phase center of the vehicle radiation antenna to be tested according to the test point positions and the test power values on the spherical surfaces with at least 3 different radii further includes: and searching the position of the phase center, interpolating along the radial direction by taking the assumed phase center as an origin, and solving the point value on the third spherical surface by using the point values on any two spherical surfaces until the difference between the point value on the third spherical surface and the test value is less than the set error.
Preferably according to N number of spherical surfacesThe test radiation power value of (2) is calculated by interpolation with the phase center as the center of a circle and R as the center of a circlekThe radiation power calibration values of each point on N spherical surfaces with the radius are obtained.
Preferably, the step of calculating a far-field pattern from the radiated power calibration value further comprises:
and according to the radiation power calibration values of all points on the N spherical surfaces, carrying out interpolation calculation on the far field value along the radial direction by taking the phase center as an origin.
Preferably, on each spherical surface, the coverage range of the test point is a pitch angle of 0-120 degrees and an azimuth angle of 0-360 degrees.
In a second aspect, the present application also proposes a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of the embodiments of the first aspect of the present application.
In a third aspect, the present application further proposes an electronic device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the method according to any of the embodiments of the first aspect of the present application.
In a fourth aspect, an embodiment of the present application further provides a system for testing active performance of an entire vehicle antenna, where the system is configured to implement the method in any one of the embodiments of the first aspect of the present application, and the system includes: the bracket, the test antenna and the rotary table are positioned in the anechoic chamber.
The anechoic chamber is a full anechoic chamber or a half anechoic chamber;
the rotary table is used for bearing the vehicle to be detected, and the rotary table can be used for vertically lifting and rotating along an azimuth angle;
the support is configured to have mobility in a horizontal direction, and the distance between the vertical position of the support and the vertical position of the rotary table is changed; the top end of the bracket is matched with the test antenna, the test antenna moves along the arc-shaped guide rail of the bracket, and the stroke covers the range of the set pitch angle;
the test antenna is used for receiving and transmitting electromagnetic waves and is at least one of the following: single-line polarization, double-line polarization, single circular polarization, double circular polarization.
Preferably, the active performance test system for the whole vehicle antenna further comprises a control system. The control system surrounds the tested vehicle and has radius R along the radius by controlling the support, the test antenna and the rotary table to movekAnd (k = 1-N, N is not less than 3) spherical surface test radiation power.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the application provides a test method and a system device which can obtain the performance of a finished automobile antenna under a far field condition by carrying out multiple times of power information acquisition under a middle field distance. The test method can obtain the equivalent omnidirectional radiation power, the receiver sensitivity, the cumulative distribution function, the near-horizontal plane radiation power, the near-horizontal plane receiver sensitivity, the active directional diagram and other performance indexes of the whole vehicle antenna under the far-field condition through the test data under the short distance.
The scheme of the application can realize the active performance index test of the whole vehicle antenna under the conditions that the whole vehicle and the antenna are not required to be disassembled as a whole and the phase information of the antenna is not required to be obtained at a short distance and at a low cost.
The scheme of the application can also eliminate the influence of serious eccentricity problems possibly caused by the fact that the antenna is located at the positions of the vehicle ear, the vehicle head, the vehicle glass and the like on the performance index of the whole vehicle antenna.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart of an active performance testing method for a vehicle antenna according to an embodiment of the present invention;
fig. 2(a) - (c) are schematic sampling diagrams of an active performance testing method for an antenna of a finished vehicle according to an embodiment of the present invention, where fig. 2(a) shows a sampling point position with a radius d1, fig. 2(b) shows a sampling point position with a radius d2, and fig. 2(c) shows a sampling point position with a radius d 3;
fig. 3 is an active performance system device for a vehicle antenna according to an embodiment of the present invention;
fig. 4 is a top view of a position of an active performance system device testing antenna for a vehicle antenna according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a flowchart of an active performance testing method for a vehicle antenna according to an embodiment of the present invention.
The embodiment of the application provides a method for testing the active performance of an entire vehicle antenna, which comprises the following steps:
In step 11, the equipment is fully preheated and the performance index is in a steady state. The vehicle to be tested is placed in a darkroom and is in a normal working state. The spherical center of the test can be, for example, the rotation center of a turntable carrying the vehicle to be tested. Further, the physical center of the vehicle to be measured can be coincident with the rotation center of the turntable, wherein the physical center of the vehicle to be measured refers to the geometric center of the vehicle.
During testing, the tested vehicle emits a test signal, the control system controls the rotary table to move at the same time, and the direction angle of the tested vehicle carried on the rotary table is adjusted so as to adjust the expected tested direction of the tested vehicle.
It should be noted that, when the test is performed on the spherical surface, the spatial sampling points are set on the whole spherical surface or a part of the spherical surface, and the test antenna can be controlled to move around the vehicle to be tested or be rotated by the vehicle to be tested.
When the range of the test covers a portion of the sphere, the test point coverage on each sphere can be determined with reference to the target angular range. The target angle range is represented by a range of central angles as a preset measurement range. For example, in each spherical surface, the coverage range of the test point is 0-120 degrees of pitch angle and 0-360 degrees of azimuth angle.
For example, further, within the above test orientations, the following tests are performed in sequence:
the control system controls the test support to be at the first position, controls the change of the azimuth angle of the tested vehicle and the change of the pitch angle of the test antenna, and traverses the tested vehicle within the target angle range at the test radius R1The spatial sampling point records the position information and the power information of the detected vehicle;
the control system controls the test support at the second position, controls the azimuth angle change of the tested vehicle and the pitch angle change of the test antenna, and traverses the tested vehicle within the target angle range within the test radius R2The spatial sampling point records the position information and the power information of the detected vehicle;
the control system controls the test support to be at the third position, controls the azimuth angle change of the tested vehicle and the pitch angle change of the test antenna, and traverses the tested vehicle within the target angle range at the test radius R3The spatial sampling point records the position information and the power information of the detected vehicle;
until the control system controls the test support to traverse the tested vehicle at the position N and the test radius RNAnd recording the position information and the power information of the detected vehicle at the space sampling point, wherein N is more than or equal to 3.
And step 12, obtaining the phase center of the radiation antenna of the vehicle to be tested according to the test point positions and the test power values on the spherical surfaces with at least 3 different radiuses.
Based on the position information and the power information of the first position, the second position, the third position, … … and the N position, the phase center of the measured vehicle radiation antenna is calculated through an eccentricity estimation algorithm, wherein the phase center means that an equiphase surface of an electromagnetic wave radiated by the whole vehicle antenna is approximate to a spherical surface after the electromagnetic wave is away from the antenna by a certain distance, and the spherical center of the spherical surface is an equivalent phase center of the antenna.
Preferably, the step of obtaining the phase center of the vehicle radiation antenna to be tested according to the test point positions and the test power values on the spherical surfaces with at least 3 different radii further includes: and searching the position of the phase center, interpolating along the radial direction by taking the assumed phase center as an origin, and solving the point value on the third spherical surface by using the point values on any two spherical surfaces until the difference between the point value on the third spherical surface and the test value is less than the set error.
For example, assuming that the phase center of the vehicle to be measured is located at (x, y, z), the position information and the power information of the first position, the second position, collected in step 11 are used to estimate the power of the third position with known position information by means of mathematical fitting, the power information of the third position estimated is compared with the power information of the third position actually collected, and the group (x, y, z) with the smallest difference is determined as the phase center of the vehicle to be measured radiating antenna. The present application refers to the above process as "eccentricity estimation". Here, the specific mathematical fitting method is not limited, and for example, a linear extrapolation method, a polynomial fitting method, a lagrange method, a newton method, or the like can be used.
Preferably, according to the test radiation power values on the N spherical surfaces, the R with the phase center as the center of the circle is calculated in an interpolation modekThe radiation power calibration values of each point on N spherical surfaces with the radius are obtained.
Or, it can be said that, assuming that the phase center is located at the center of the measurement plane, the power values of the test points on the test spherical surface at the first position, the second position, the third position, … … and the N position are corrected.
And 14, calculating a far-field directional diagram according to the radiation power calibration value.
Further comprising: and according to the radiation power calibration values of all points on the N spherical surfaces, carrying out interpolation calculation on the far field value along the radial direction by taking the phase center as an origin.
Preferably, the method for interpolation in the radial direction in the present application is:
where P is the power, x is the distance from the phase center, and a, b, c are fitting constants.
Based on the position information and the radiation power calibration value of the first position, the second position, the third position, … … and the N position, the far-field radiation power of the whole vehicle is obtained through calculation, and then the wireless performance index of the whole vehicle antenna is obtained: equivalent omnidirectional radiation power, receiver sensitivity, cumulative distribution function, near-horizontal plane radiation power, near-horizontal plane receiver sensitivity, active directional diagram and other performance indexes. Wherein, the position information of the position one, the position two, the position three, the … … and the position N obtained in step 13 and the radiation power calibration value are used to confirm the fitting constant (as formula 1) in any one fitting function, and then the power information at far-field distance is estimated by the fitting function. The present application refers to the above process as a "midfield amplitude compensation algorithm".
It should be noted that equation 1 gives a best fit function. However, the scheme of the present application is not limited to the use of equation 1. Those skilled in the art may construct the fitting function in other ways to achieve the calculation of the radial interpolation.
It should be noted that the method of the application can be applied to the active performance index test of the antenna of the whole vehicle, the whole vehicle and the antenna are taken as a whole, the antenna does not need to be separated independently, and the phase information on the antenna radiation surface does not need to be obtained.
Fig. 2(a) - (c) are schematic sampling diagrams of an active performance testing method for an antenna of a vehicle according to an embodiment of the present invention, where fig. 2(a) shows a sampling point position with a radius d1, fig. 2(b) shows a sampling point position with a radius d2, and fig. 2(c) shows a sampling point position with a radius d 3.
For example, the control system controls the test support and the test antenna to traverse the spatial sampling point of the tested vehicle at the first position, and records the position information and the power information of the tested vehicle. The first position refers to a position larger than the maximum outer size of the vehicle to be detected.
And controlling the test support and the test antenna to traverse the spatial sampling point of the tested vehicle at the second position through the control system, and recording the position information and the power information of the tested vehicle. Wherein, the position two is farther away from the detected vehicle than the position one.
And controlling the test support and the test antenna to traverse the spatial sampling point of the tested vehicle at the third position through the control system, and recording the position information and the power information of the tested vehicle. Wherein, the third position is farther away from the vehicle to be detected than the second position.
And controlling the test support and the test antenna to traverse the spatial sampling point of the tested vehicle at the position N through the control system, and recording the position information and the power information of the tested vehicle. And the position N is far away from the tested vehicle than the position N-1, and the value of N is an integer greater than or equal to 3.
And calculating the phase center of the measured vehicle radiation antenna through the eccentricity estimation algorithm according to the position information and the power information of the position I, the position II, the position III, the position … … and the position N. Referring to fig. 2(a), on the premise that the position-distance from the physical center of the whole vehicle is d1, two-dimensional sampling is performed in the radiation direction of the antenna of the whole vehicle, and the sampling points are shown in the figure. Fig. 2(b) and fig. 2(c) are schematic sampling diagrams of distances d2 and d3 from the physical center of the entire vehicle at position two and position three, respectively.
And correcting power information of a position I, a position II, a position III, … … and a position N according to the power values measured at the test points and the calculated phase center of the radiation antenna of the vehicle to be measured, and calculating performance indexes such as equivalent omnidirectional radiation power, receiver sensitivity, an accumulated distribution function, near-horizontal plane radiation power, near-horizontal plane receiver sensitivity, an active directional diagram and the like of the vehicle to be measured in a far field through a medium-field amplitude compensation algorithm based on the position information and the power information of the position I, the position II, the position III, … … and the position N.
Fig. 3 is an active performance system device for a vehicle antenna according to an embodiment of the present invention.
The embodiment of the present application further provides a system for testing active performance of an entire vehicle antenna, which is used to implement the method in any one of the embodiments of the first aspect of the present application, where the test system includes: the device comprises a support 21, a test antenna 22, a rotary table 23, a test instrument 24, a radio frequency switching box 25 and a control system 27 which are positioned in an anechoic chamber 26, wherein the test support, the rotary table and the test instrument are all connected with the control system, and the test instrument is connected with the test antenna.
The anechoic chamber is a full anechoic chamber or a half anechoic chamber; the grey triangles distributed on the inner wall of the anechoic chamber represent the wave-absorbing material layer.
The rotary table is used for bearing the vehicle to be detected, and the rotary table can be used for vertically lifting and rotating along the azimuth angle.
The support is configured to have mobility in a horizontal direction, and the distance between the vertical position of the support and the vertical position of the rotary table is changed; the test antenna is matched with the top end of the support and moves along the arc-shaped guide rail of the support, and the stroke covers the set pitch angle range.
The test antenna is used for receiving and transmitting electromagnetic waves and is at least one of the following: single-line polarization, double-line polarization, single circular polarization, double circular polarization.
Preferably, the active performance test system for the whole vehicle antenna further comprises a control system. The control system surrounds the tested vehicle and has radius R along the radius by controlling the support, the test antenna and the rotary table to movekAnd (k = 1-N, N is not less than 3) spherical surface test radiation power.
Fig. 4 is a top view of a position of an active performance system device testing antenna for a vehicle antenna according to an embodiment of the present invention.
In this embodiment, the test stand 21 is used to place the test antenna at different measurement positions, and the test antenna 22 is used to collect power information of the vehicle under test. The test support 21 has two-dimensional freedom degrees, and can move along the arc-shaped guide rail at first, and the stroke covers the range of a pitch angle of 0-120 degrees; and then the spherical space sampling point can move back and forth along the radial direction of the center of the turntable to meet the requirements of the spherical space sampling points shown in figures 2(a) - (c).
The test support and the test antenna are used for acquiring power information at three or more different positions away from the vehicle to be tested by a certain distance. The test antenna is used for sending and receiving signals, the adopted polarization direction comprises single-wire polarization, double-wire polarization, single circular polarization or double circular polarization, and any polarization direction is formed by adding an attenuator and a phase shifter;
the rotary table 23 is used for carrying a tested vehicle and adjusting the expected tested direction of the tested equipment, and the travel covers the range of 0-360 degrees of azimuth angles;
the test instrument 24 performs measurement analysis on the test signal, wherein the instrument includes but is not limited to a comprehensive tester, a signal generator, a spectrum analyzer, a vector network analyzer and a power meter;
the radio frequency switching box 25 supports signal amplification, signal filtering and frequency conversion, processes the signals and outputs the processed signals to the instrument, wherein the radio frequency switching box comprises but is not limited to an amplifier, a low noise amplifier, a switch, a combiner, a filter, a radio frequency cable and frequency conversion equipment;
the anechoic chamber 26 is used for shielding external electromagnetic signals and providing a clean electromagnetic space for the tested vehicle, and comprises a full anechoic chamber and a half anechoic chamber; the grey triangles distributed on the inner wall of the anechoic chamber represent the wave-absorbing material layer.
The control system 27 transmits a downlink signal to the object to be tested by controlling the test bracket, the test antenna and the test instrument, or receives an uplink signal from the object to be tested, and recovers the performance index of the whole vehicle antenna under the far field condition by power signals acquired at three or more different positions away from the object to be tested at a certain distance.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Thus, in connection with the control system, the application also proposes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method as described in any of the embodiments of the application.
Further, the present application also proposes an electronic device, as a part of the control system or associated with the control system, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the method according to any of the embodiments of the present application.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (9)
1. A method for testing the active performance of a finished automobile antenna is characterized by comprising the following steps:
around the vehicle to be measured, along a radius Rk(k = 1-N, N is not less than 3) measuring radiation power of at least one part of the spherical surface;
obtaining the phase center of the vehicle radiation antenna to be tested according to the test point positions and the test power values on the spherical surfaces with at least 3 different radiuses; the phase center is the spherical center of an equiphase surface of electromagnetic waves radiated by the whole vehicle antenna;
according to the position of the phase center, the position of the test point and the test power value, calculating the position of the phase center which is used as the center of a circle and RkThe radiation power calibration value of each point on N spherical surfaces with the radius;
calculating a far-field pattern from the radiated power calibration value, comprising: and according to the radiation power calibration values of all points on the N spherical surfaces, carrying out interpolation calculation on the far field value along the radial direction by taking the phase center as an origin.
2. The active performance testing method of the whole vehicle antenna according to claim 1,
the step of obtaining the phase center of the vehicle radiation antenna to be tested according to the test point positions and the test power values on the spherical surfaces with at least 3 different radiuses further comprises the following steps:
and searching the position of the phase center, interpolating along the radial direction by taking the assumed phase center as an origin, and solving the point value on the third spherical surface by using the point values on any two spherical surfaces until the difference between the point value on the third spherical surface and the test value is less than the set error.
3. The active performance testing method of the whole vehicle antenna according to claim 1,
according to the test radiation power values on the N spherical surfaces, calculating the R by taking the phase center as the center of a circle in an interpolation modekThe radiation power calibration values of each point on N spherical surfaces with the radius are obtained.
4. The active performance test method of the whole vehicle antenna according to claim 3, wherein the method of radial interpolation is as follows:
where P is the power, x is the distance from the phase center, and a, b, c are constants.
5. The active performance testing method of the whole vehicle antenna according to claim 1,
in each spherical surface, the coverage range of the test point is 0-120 degrees of a pitch angle and 0-360 degrees of an azimuth angle.
6. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method of any one of claims 1 to 5.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method according to any of claims 1 to 5 when executing the computer program.
8. A complete vehicle antenna active performance test system for realizing the method of any one of claims 1 to 5 is characterized by comprising the following steps: the bracket, the test antenna and the rotary table are positioned in the anechoic chamber;
the anechoic chamber is a full anechoic chamber or a half anechoic chamber;
the rotary table is used for bearing the vehicle to be detected, and the rotary table can be used for vertically lifting and rotating along an azimuth angle;
the support is configured to have mobility in a horizontal direction, and the distance between the vertical position of the support and the vertical position of the rotary table is changed; the top end of the bracket is matched with the test antenna, the test antenna moves along the arc-shaped guide rail of the bracket, and the stroke covers the range of the set pitch angle;
the test antenna is used for receiving and transmitting electromagnetic waves and is at least one of the following: single-line polarization, double-line polarization, single circular polarization, double circular polarization.
9. The active performance testing system for the whole vehicle antenna according to claim 8, further comprising a control system,
the control system surrounds the tested vehicle and has radius R along the radius by controlling the support, the test antenna and the rotary table to movekAnd (k = 1-N, N is not less than 3) spherical surface test radiation power.
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