CN116826381B - Phased array antenna pointing accuracy correction method, device and system - Google Patents
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Abstract
The application relates to the technical field of antenna precision correction, in particular to a method, equipment and a system for correcting the pointing precision of a phased array antenna, wherein the method comprises the following steps: acquiring phase information of the phased array antenna under different test pointing angles; determining compensation control angles corresponding to the test pointing angles according to the phase information; fitting each test pointing angle and the corresponding compensation control angle in a nonlinear interpolation mode to obtain a polynomial function; verifying the polynomial function; and if the verification is passed, correcting the pointing precision of the phased array antenna based on the polynomial function. The phase information in the application is the phase information of the beam pointing range corresponding to the test pointing angle; the beam pointing range is an angle range with the test pointing angle as the center and the upper and lower amplitudes not exceeding a preset threshold. Compared with the prior art, the technical scheme of the application has the advantages that the data acquisition efficiency is higher, and the correction efficiency is faster. The polynomial function is put into use after verification is passed to ensure correction accuracy.
Description
Technical Field
The present application relates to the field of antenna accuracy correction technologies, and in particular, to a method, an apparatus, and a system for correcting pointing accuracy of a phased array antenna.
Background
Along with the development of electronic countermeasure technology and the need of external space target detection and control, the development of practical radars has reached the phased array radar stage. The beam scanning of the phased array radar antenna is controlled by a computer, so that the phased array radar antenna has no inertia problem, and has the capabilities of high scanning speed, high beam forming speed, high tracking capacity, high searching precision, flexible and agile beam scanning and the like which are not possessed by conventional antennas, and has great flexibility.
With the rapid development of space technology and radar technology, the requirements on the tracking capability and the searching capability of the antenna are increasing. But how to more effectively improve the beam pointing accuracy of phased array antennas has been attracting attention; improving beam pointing accuracy is a necessary requirement for radar antennas in the current electronic countermeasure age, and phased array radars have the same requirement for phased array antennas. The beam pointing accuracy of phased array antennas is one of its important technical indicators. Some tracking guidance radars and precision range measurement radars even require beam pointing accuracy to the tenth milliradian.
The pointing accuracy of phased array antennas is mainly affected by the following errors:
1. the antenna array element processing and mounting errors cause the difference of unit patterns, so that the array surface amplitude and phase errors are caused;
2. array plane amplitude-phase errors caused by radiation unit position errors;
3. array plane phase error caused by quantization error and execution error of the phase shifter;
4. array plane amplitude errors caused by attenuator quantization errors and execution errors;
5. adjusting the phase error of the array surface caused by additional phase modulation when the attenuator is adjusted;
6. array plane amplitude-phase errors caused by mutual coupling among array elements;
7. amplitude-phase errors caused by unbalanced array temperature;
8. array plane amplitude and phase errors caused by array element failure.
By means of the digital phase shifter, the phased array antenna can transfer the wave beam from one direction to the other direction within a plurality of milliseconds, so that effective tracking of a moving target is realized, but the digital phase shifter cannot continuously shift the phase, so that deviation exists between the actual phase and the ideal phase of each unit of the phased array antenna, namely the problem of phase quantization error occurs. The method for solving the quantized phase of the phased array antenna adopts a random phase feeding method, wherein the method comprises a two-possible value method, a pre-addition phase method, a phase error mean value zero method and the like, but errors caused by processing, installation, mutual coupling, temperature change, array element failure and the like cannot be estimated in advance, and a temporary and effective method in the prior art is not predicted in advance and is solved through design and algorithm; the beam pointing accuracy of a phased array antenna can only be improved by the pointing accuracy correction.
In the prior art, the beam pointing accuracy of the phased array antenna is corrected by extracting an antenna pattern of the phased array antenna, specifically, the peak angle of the sum pattern or the null angle of the difference pattern in the antenna pattern is extracted as the beam pointing angle for correction. However, the higher the pointing correction accuracy is, the more pattern information needs to be acquired, the longer the pointing correction with high accuracy is, the lower the efficiency is and the higher the cost is.
Disclosure of Invention
The application provides a method, equipment and a system for correcting the pointing precision of a phased array antenna, which aims to overcome the problems that the correction of the pointing precision of the beam of the phased array antenna in the related technology needs a long time, is low in efficiency and is high in cost at least to a certain extent.
The scheme of the application is as follows:
according to a first aspect of an embodiment of the present application, there is provided a method for correcting pointing accuracy of a phased array antenna, including:
acquiring phase information of the phased array antenna under different test pointing angles; the phase information is the phase information of the beam pointing range corresponding to the test pointing angle; the beam pointing range is an angle range with the test pointing angle as the center and the upper and lower amplitude not exceeding a preset threshold;
determining compensation control angles corresponding to the test pointing angles according to the phase information;
fitting each test pointing angle and the corresponding compensation control angle in a nonlinear interpolation mode to obtain a polynomial function;
verifying the polynomial function;
and if the verification is passed, correcting the pointing precision of the phased array antenna based on the polynomial function.
Preferably, verifying the polynomial function comprises:
calculating compensation control angles corresponding to the test pointing angles through the polynomial function;
and if the error between the compensation control angle determined according to the phase information and the compensation control angle calculated by the polynomial function meets the pointing precision index, verifying to pass.
Preferably, if the verification is not passed, increasing the number of the test pointing angles;
obtaining an updated polynomial function according to the updated test pointing angle;
and verifying the updated polynomial function.
Preferably, the correcting the pointing accuracy of the phased array antenna based on the polynomial function includes:
inputting the actual pointing angle to be corrected into the polynomial function;
and calculating the compensation control angle corresponding to the actual pointing angle to be corrected according to the polynomial function.
Preferably, the angular intervals of the test pointing angles are the same.
Preferably, acquiring phase information of the phased array antenna at different test pointing angles includes:
setting a beam pointing range, a rotation angle interval and a time interval of the phased array antenna;
when a test starting instruction is received, controlling a transmission device to drive the phased array antenna to rotate by taking the rotation angle interval as a reference based on the time interval;
after each rotation, the phased array antenna is controlled by the wave control box to perform wave beam electric scanning in a wave beam pointing range corresponding to the current test pointing angle;
and acquiring phase information of the phased array antenna after each rotation.
Preferably, the phase information includes: differential channel phase information.
Preferably, determining the compensation control angle corresponding to each test pointing angle according to the phase information includes:
determining beam direction when the phase of the differential beam turns according to the phase information of the differential channel;
and determining the beam direction when the phase of the differential beam turns over as a compensation control angle corresponding to the test direction angle.
According to a second aspect of the embodiment of the present application, there is provided a phased array antenna pointing accuracy correction apparatus, including:
a processor and a memory;
the processor is connected with the memory through a communication bus:
the processor is used for calling and executing the program stored in the memory;
the memory is used for storing a program, and the program is at least used for executing a method for correcting the pointing accuracy of the phased array antenna.
According to a third aspect of the embodiment of the present application, there is provided a phased array antenna pointing accuracy correction system, including:
phased array antenna, transmission device, vector network analyzer, horn antenna, wave control box and control terminal;
the phased array antenna and the horn antenna are both connected with the vector network analyzer;
the control terminal is connected with the vector network analyzer and the transmission device and is also connected with the phased array antenna through the wave control box;
the phased array antenna is aligned with the horn antenna;
the transmission device is used for driving the phased array antenna to rotate;
the vector network analyzer is used for receiving phase information of the phased array antenna under different test pointing angles and sending the phase information to the control terminal; the phase information is the phase information of the beam pointing range corresponding to the test pointing angle; the beam pointing range is an angle range with the test pointing angle as the center and the upper and lower amplitude not exceeding a preset threshold;
the control terminal is used for controlling the transmission device to drive the phased array antenna to rotate, and the wave control box is used for controlling the wave beam direction of the phased array antenna;
the control terminal also acquires phase information of the phased array antenna under different test pointing angles;
determining compensation control angles corresponding to the test pointing angles according to the phase information;
fitting each test pointing angle and the corresponding compensation control angle in a nonlinear interpolation mode to obtain a polynomial function;
verifying the polynomial function;
and if the verification is passed, correcting the pointing precision of the phased array antenna based on the polynomial function.
The technical scheme provided by the application can comprise the following beneficial effects: the method for correcting the pointing precision of the phased array antenna comprises the following steps: acquiring phase information of the phased array antenna under different test pointing angles; determining compensation control angles corresponding to the test pointing angles according to the phase information; fitting each test pointing angle and the corresponding compensation control angle in a nonlinear interpolation mode to obtain a polynomial function; verifying the polynomial function; and if the verification is passed, correcting the pointing precision of the phased array antenna based on the polynomial function. The phase information in the application is the phase information of the beam pointing range corresponding to the test pointing angle; the beam pointing range is an angle range with the test pointing angle as the center and the upper and lower amplitudes not exceeding a preset threshold. Compared with the prior art, the technical scheme of the application has higher efficiency in acquiring the data, and the polynomial function is obtained by fitting according to the corresponding relation between each test pointing angle and the compensation control angle, so that the test quantity and the data storage quantity of the data can be greatly reduced, and the correction efficiency is improved. And the polynomial function is put into use only after the verification is passed, so that the correction precision can be ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic flow chart of a method for correcting pointing accuracy of a phased array antenna according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a phased array antenna pointing accuracy correction apparatus according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a phased array antenna pointing accuracy correction system according to an embodiment of the present application.
Reference numerals: a processor-21; a memory-22; a phased array antenna-31; a transmission-32; vector network analyzer-33; horn antenna-34; a wave control box-35; control terminal-36.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
Example 1
Fig. 1 is a flowchart of a method for correcting pointing accuracy of a phased array antenna according to an embodiment of the present application, and referring to fig. 1, a method for correcting pointing accuracy of a phased array antenna includes:
s11: acquiring phase information of the phased array antenna under different test pointing angles; the phase information is the phase information of the beam pointing range corresponding to the test pointing angle; the beam pointing range is an angle range with the test pointing angle as the center and the upper and lower amplitude not exceeding a preset threshold value;
s12: determining compensation control angles corresponding to the test pointing angles according to the phase information;
s13: fitting each test pointing angle and the corresponding compensation control angle in a nonlinear interpolation mode to obtain a polynomial function;
s14: verifying the polynomial function;
s15: and if the verification is passed, correcting the pointing precision of the phased array antenna based on the polynomial function.
It should be noted that the phase of the sum channel pattern is flat near the beam pointing, while the phase of the difference channel pattern is inverted right and left at the beam pointing; the actual beam pointing of the phased array antenna can thus be determined by detecting the phase of the phased array antenna.
Based on the phase information of the phased array antenna under different test pointing angles is obtained, comprising:
setting a beam pointing range, a rotation angle interval and a time interval of the phased array antenna;
when a test starting instruction is received, controlling a transmission device based on a time interval to drive the phased array antenna to rotate by taking a rotation angle interval as a reference;
after each rotation, the phased array antenna is controlled by the wave control box to perform wave beam electric scanning in a wave beam pointing range corresponding to the current test pointing angle;
and acquiring phase information of the phased array antenna after each rotation.
The phase information includes: differential channel phase information.
It can be understood that in this embodiment, the compensation control angles corresponding to the test pointing angles are determined only according to the difference channel phase information.
Further, determining the compensation control angle corresponding to each test pointing angle according to the phase information includes:
determining beam direction when the phase of the differential beam turns according to the phase information of the differential channel;
and determining the beam direction when the phase of the differential beam turns over as a compensation control angle corresponding to the test direction angle.
It should be noted that, the beam direction when the phase of the differential beam is inverted is the beam direction with the largest phase change of the differential beam, and the average value of the phases before and after inversion and the beam direction equal to the channel phase.
For example, the beam pointing range of the phased array antenna is set to be an angle range of + -0.5 DEG centering on the test pointing angle, i.e., if the current test pointing angle is 5 DEG, the corresponding beam pointing range is 4.5 DEG-5.5 deg.
The angle intervals of the test pointing angles are the same.
In this example, the rotation angle interval is set to 5 ° and the time interval is set to 1 minute.
And (3) connecting the phased array antenna and the horn antenna into a vector network analyzer, aligning the phased array antenna with the horn antenna for receiving phased array antenna signals, controlling the transmission device to drive the phased array antenna to rotate by 5 degrees, controlling the phased array antenna to conduct beam electric scanning within the beam pointing range of 4.5-5.5 degrees through the wave control box, and simultaneously extracting phase information of the sum channel and the difference channel of the phased array antenna by the vector network analyzer.
The above procedure is repeated to obtain the compensation control angles corresponding to the test pointing angles as shown in table 1 below.
It can be understood that in this embodiment, the data is acquired by using the electric scanning mode of the phased array antenna, so that the data acquisition efficiency can be greatly improved.
As shown in table 1 below, each test pointing angle corresponds to a compensation control angle determined from the phase information and a compensation control angle calculated by a polynomial function.
Table 1:
in this embodiment, verifying the polynomial function includes:
calculating compensation control angles corresponding to the test pointing angles through polynomial functions;
and if the error between the compensation control angle determined according to the phase information and the compensation control angle calculated by the polynomial function meets the pointing precision index, verifying to pass.
The polynomial function obtained by fitting the data in table 1 is:
y = 3E-09x 6 + 2E-07x 5 - 1E-06x 4 - 3E-05x 3 + 0.0002x 2 + 1.012x + 0.0003；
in table 1, column B is a compensation control angle determined according to the phase information, column C is a compensation control angle calculated by a polynomial function, and as can be seen from the error values (column D) of columns B and C, the pointing accuracy error can reach 0.04 °, and most of phased array pointing accuracy requirements can be satisfied.
It should be noted that if the verification is not passed, the number of the test pointing angles is increased;
obtaining an updated polynomial function according to the updated test pointing angle;
and verifying the updated polynomial function.
It can be appreciated that in this embodiment, when the verification of the polynomial function is not passed, the number of steps may be reduced by increasing the number of the test pointing angles, and the precision of the polynomial function may be improved by re-fitting the polynomial function by increasing the data collection amount.
And verifying the updated polynomial function until the error between the compensation control angle determined according to the phase information and the compensation control angle calculated by the polynomial function meets the pointing precision index, namely the polynomial function passes the verification.
It should be noted that, performing the pointing accuracy correction on the phased array antenna based on the polynomial function includes:
inputting a polynomial function to be corrected into an actual pointing angle;
and calculating and obtaining a compensation control angle corresponding to the actual pointing angle to be corrected according to the polynomial function.
It can be understood that in specific practice, the compensation control angle of any angle of the phased array antenna can be obtained through a polynomial function, and any actual pointing angle to be corrected is input into the polynomial function, so that the corresponding compensation control angle can be obtained, and the pointing precision of the phased array antenna is corrected according to the compensation control angle.
It can be understood that, in the technical scheme in this embodiment, the efficiency of acquiring data is higher than that of the prior art, and the polynomial function is obtained by fitting the corresponding relation between each test pointing angle and the compensation control angle, so that the test amount of data and the data storage amount can be greatly reduced, and the correction efficiency is improved. And the polynomial function is put into use only after the verification is passed, so that the correction precision can be ensured.
Example two
Fig. 2 is a schematic structural diagram of a phased array antenna pointing accuracy correction apparatus according to an embodiment of the present application, and referring to fig. 2, a phased array antenna pointing accuracy correction apparatus includes:
a processor 21 and a memory 22;
the processor 21 is connected to the memory 22 via a communication bus:
wherein the processor 21 is used for calling and executing the program stored in the memory 22;
the memory 22 is configured to store a program for performing at least one correction method of the pointing accuracy of the phased array antenna as in the above embodiment.
Example III
Fig. 3 is a schematic structural diagram of a phased array antenna pointing accuracy correction system according to an embodiment of the present application, and referring to fig. 3, a phased array antenna pointing accuracy correction system includes:
a phased array antenna 31, a transmission device 32, a vector network analyzer 33, a horn antenna 34, a wave control box 35 and a control terminal 36;
the phased array antenna 31 and the horn antenna 34 are both connected with the vector network analyzer 33;
the control terminal 36 is connected with the vector network analyzer 33 and the transmission device 32, and is also connected with the phased array antenna 31 through the wave control box 35;
phased array antenna 31 is aligned with horn antenna 34;
the transmission device 32 is used for driving the phased array antenna 31 to rotate;
the vector network analyzer 33 is configured to receive phase information of the phased array antenna 31 at different test pointing angles, and send the phase information to the control terminal 36; the phase information is the phase information of the beam pointing range corresponding to the test pointing angle; the beam pointing range is an angle range with the test pointing angle as the center and the upper and lower amplitude not exceeding a preset threshold value;
the control terminal 36 is used for controlling the transmission device 32 to drive the phased array antenna 31 to rotate, and controlling the beam direction of the phased array antenna 31 through the wave control box 35;
the control terminal 36 also acquires phase information of the phased array antenna 31 at different test pointing angles;
determining compensation control angles corresponding to the test pointing angles according to the phase information;
fitting each test pointing angle and the corresponding compensation control angle in a nonlinear interpolation mode to obtain a polynomial function;
verifying the polynomial function;
and if the verification is passed, correcting the pointing precision of the phased array antenna based on the polynomial function.
In specific practice, the horn antenna 34 is connected to port 1 of the vector network analyzer 33, the sum channel of the phased array antenna 31 is connected to port 2 of the vector network analyzer 33, and the difference channel of the phased array antenna 31 is connected to port 3 of the vector network analyzer 33.
In specific practice, the actuator 32 may be, but is not limited to, a robotic arm or turret.
Compared with the prior art, the phased array antenna pointing accuracy correction system has higher efficiency in acquiring data, and the polynomial function is obtained by fitting the corresponding relation between each test pointing angle and the compensation control angle, so that the test quantity and the data storage quantity of the data can be greatly reduced, and the correction efficiency is improved. And the polynomial function is put into use only after the verification is passed, so that the correction precision can be ensured.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (7)
1. The method for correcting the pointing precision of the phased array antenna is characterized by comprising the following steps of:
acquiring phase information of the phased array antenna under different test pointing angles; the phase information is the phase information of the beam pointing range corresponding to the test pointing angle; the beam pointing range is an angle range with the test pointing angle as the center and the upper and lower amplitude not exceeding a preset threshold;
determining compensation control angles corresponding to the test pointing angles according to the phase information;
fitting each test pointing angle and the corresponding compensation control angle in a nonlinear interpolation mode to obtain a polynomial function;
verifying the polynomial function;
if the verification is passed, correcting the pointing precision of the phased array antenna based on the polynomial function;
calculating compensation control angles corresponding to the test pointing angles through the polynomial function;
if the error between the compensation control angle determined according to the phase information and the compensation control angle obtained through polynomial function calculation meets the pointing precision index, verifying to pass;
the phase information includes: difference channel phase information;
determining a compensation control angle corresponding to each test pointing angle according to the phase information, including:
determining beam direction when the phase of the differential beam turns according to the phase information of the differential channel;
and determining the beam direction when the phase of the differential beam turns over as a compensation control angle corresponding to the test direction angle.
2. The method of claim 1, wherein if the verification fails, increasing the number of test pointing angles;
obtaining an updated polynomial function according to the updated test pointing angle;
and verifying the updated polynomial function.
3. The method of claim 1, wherein correcting the pointing accuracy of the phased array antenna based on the polynomial function comprises:
inputting the actual pointing angle to be corrected into the polynomial function;
and calculating the compensation control angle corresponding to the actual pointing angle to be corrected according to the polynomial function.
4. The method of claim 1, wherein the angular intervals of the test pointing angles are the same.
5. The method of claim 4, wherein obtaining phase information for the phased array antenna at different test pointing angles comprises:
setting a beam pointing range, a rotation angle interval and a time interval of the phased array antenna;
when a test starting instruction is received, controlling a transmission device to drive the phased array antenna to rotate by taking the rotation angle interval as a reference based on the time interval;
after each rotation, the phased array antenna is controlled by the wave control box to perform wave beam electric scanning in a wave beam pointing range corresponding to the current test pointing angle;
and acquiring phase information of the phased array antenna after each rotation.
6. A phased array antenna pointing accuracy correction apparatus, comprising:
a processor and a memory;
the processor is connected with the memory through a communication bus:
the processor is used for calling and executing the program stored in the memory;
the memory is used for storing a program at least for executing a correction method of the pointing accuracy of the phased array antenna according to any one of claims 1 to 5.
7. A phased array antenna pointing accuracy correction system, comprising:
phased array antenna, transmission device, vector network analyzer, horn antenna, wave control box and control terminal;
the phased array antenna and the horn antenna are both connected with the vector network analyzer;
the control terminal is connected with the vector network analyzer and the transmission device and is also connected with the phased array antenna through the wave control box;
the phased array antenna is aligned with the horn antenna;
the transmission device is used for driving the phased array antenna to rotate;
the vector network analyzer is used for receiving phase information of the phased array antenna under different test pointing angles and sending the phase information to the control terminal; the phase information is the phase information of the beam pointing range corresponding to the test pointing angle; the beam pointing range is an angle range with the test pointing angle as the center and the upper and lower amplitude not exceeding a preset threshold;
the control terminal is used for controlling the transmission device to drive the phased array antenna to rotate, and the wave control box is used for controlling the wave beam direction of the phased array antenna;
the control terminal also acquires phase information of the phased array antenna under different test pointing angles;
determining compensation control angles corresponding to the test pointing angles according to the phase information;
fitting each test pointing angle and the corresponding compensation control angle in a nonlinear interpolation mode to obtain a polynomial function;
verifying the polynomial function;
if the verification is passed, correcting the pointing precision of the phased array antenna based on the polynomial function;
calculating compensation control angles corresponding to the test pointing angles through the polynomial function;
if the error between the compensation control angle determined according to the phase information and the compensation control angle obtained through polynomial function calculation meets the pointing precision index, verifying to pass;
the phase information includes: difference channel phase information;
determining a compensation control angle corresponding to each test pointing angle according to the phase information, including:
determining beam direction when the phase of the differential beam turns according to the phase information of the differential channel;
and determining the beam direction when the phase of the differential beam turns over as a compensation control angle corresponding to the test direction angle.
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