CN-115712096-B - Subarray-level limited phase interval initial phase compensation method, system, medium and equipment

CN115712096BCN 115712096 BCN115712096 BCN 115712096BCN-115712096-B

Abstract

The present invention belongs to the field of radar technology, in particular to a subarray level limited phase interval initial phase compensation method, a system, a medium and equipment. The method comprises the steps of 1, obtaining initial phase data of each antenna subarray in a radar array surface, 2, sequentially performing curve fitting on the initial phase data of each row of antenna subarrays to obtain a first compensation value of the initial phase data of each row of antenna subarrays, 3, sequentially performing curve fitting on the initial phase data of each column of antenna subarrays to obtain a second compensation value of the initial phase data of each column of antenna subarrays, and 4, compensating the initial phase data of each antenna subarray based on the first compensation value and the second compensation value. The invention can eliminate the linear phase existing on the array surface, reduce the requirement of the phase compensation amount of the phase shifter/digital transceiver assembly, reduce the data processing amount and improve the compensation efficiency.

Inventors

ZHANG CHENGHUI
WANG YINGHUI

Assignees

北京无线电测量研究所

Dates

Publication Date: 20260505
Application Date: 20221114

Claims (9)

1.A method for subarray-level finite phase interval initial phase compensation, comprising: step1, acquiring initial phase data of each antenna subarray in a radar array surface; step2, sequentially performing curve fitting on the initial phase data of each row of antenna subarrays to obtain a first compensation value of the initial phase data of each row of antenna subarrays; step 3, sequentially performing curve fitting on the initial phase data of each array of antenna subarrays to obtain a second compensation value of the initial phase data of each array of antenna subarrays; step 4, compensating the initial phase data of each antenna subarray based on the first compensation value and the second compensation value; Further comprises: And 5, obtaining the minimum value in the initial phase data of all the antenna subarrays, subtracting the minimum value from the initial phase data of each antenna subarray, and finishing the secondary compensation of the initial phase data of the antenna subarrays.
2. The method for initially compensating a finite phase interval of a subarray level according to claim 1, wherein the step of acquiring the initial phase data of each antenna subarray in the radar array plane comprises the steps of acquiring the initial phase of a phased array antenna through a near field test system and obtaining the initial phase data of each antenna subarray according to the initial phase.
3. The method of subarray-level finite phase interval initial phase compensation according to claim 1, wherein the first compensation value is represented by a first formula: The first formula is: =k p y+b p , wherein, For a first compensation value of the p-th row and y-th column sub-array phase, For the slope of the curve fitted from the p-th line phase data, y is the subarray coordinates, For the curve intercept fitted from the p-th line phase data.
4. The method of subarray-level finite phase interval initial phase compensation according to claim 1, wherein the second compensation value is represented by a second formula: the second formula is: =k q y+b q , wherein, For the second compensation value of the qh column and the x-th row subarray phase, k q is the slope of the curve fitted according to the qh column phase data, x is the row coordinate of the subarray, For the curve intercept fitted from the q-th column of phase data.
5. The method of subarray-level finite phase interval initial phase compensation according to claim 1, wherein step 1 further comprises: And averaging the initial phase data of the antenna units in any antenna subarray to obtain an average value corresponding to the antenna subarray, and taking the average value as the initial phase data of the antenna subarray.
6. A subarray-level finite phase interval initial phase compensation system employing a subarray-level finite phase interval initial phase compensation method according to claim 1, comprising: the acquisition module is used for acquiring initial phase data of each antenna subarray in the radar array surface; The first calculation module is used for sequentially performing curve fitting on the initial phase data of each row of antenna subarrays to obtain a first compensation value of the initial phase data of each row of antenna subarrays; The second calculation module is used for sequentially performing curve fitting on the initial phase data of each array of antenna subarrays to obtain a second compensation value of the initial phase data of each array of antenna subarrays; The compensation module is used for compensating the initial phase data of each antenna subarray based on the first compensation value and the second compensation value.
7. The finite phase interval initial phase compensation system of claim 6, wherein acquiring initial phase data of each antenna subarray in the radar array surface comprises acquiring initial phase of a phased array antenna through a near field test system, and obtaining initial phase data of each antenna subarray according to the initial phase.
8. A storage medium having stored therein instructions which, when read by a computer, cause the computer to perform the method of any of claims 1 to 5.
9. An electronic device comprising the storage medium of claim 8, a processor to execute instructions within the storage medium.

Description

Subarray-level limited phase interval initial phase compensation method, system, medium and equipment Technical Field The present invention belongs to the field of radar technology, in particular to a subarray level limited phase interval initial phase compensation method, a system, a medium and equipment. Background Phased array antennas achieve beam scanning by controlling the phase of each channel. However, when the signals radiated by each unit are not consistent at the initial phase of the array surface, the first side lobe level and the difference zero depth of the antenna pattern are influenced, and the radar power is reduced. The phase inconsistency is mainly caused by device manufacturing errors, array surface assembly errors, environmental factor influences and the like. Therefore, the phased array antenna needs to collect an initial phase in a test before delivery, and phase compensation is performed by controlling the phase shifter assembly or the digital receiving and transmitting assembly, so that phase consistency of all units is ensured. When the antenna array surface scale is large, the data volume of unit-level initial phase compensation is extremely large. In addition, the initial phases at different positions of the array surface may have larger phase difference, the numerical value of the initial phases is distributed between 0 and 360 degrees, and for certain phase-shifting control systems specific to phased array antennas, the compensatory phase of the phase-shifting control system is only 90 degrees, so that complete compensation cannot be realized. Disclosure of Invention The invention aims to provide a subarray-level limited phase interval initial phase compensation method, a subarray-level limited phase interval initial phase compensation system, subarray-level limited phase interval initial phase compensation medium and subarray-level limited phase interval initial phase compensation equipment. The technical scheme for solving the technical problems is as follows, the subarray-level limited phase interval initial phase compensation method comprises the following steps: step1, acquiring initial phase data of each antenna subarray in a radar array surface; step2, sequentially performing curve fitting on the initial phase data of each row of antenna subarrays to obtain a first compensation value of the initial phase data of each row of antenna subarrays; step 3, sequentially performing curve fitting on the initial phase data of each array of antenna subarrays to obtain a second compensation value of the initial phase data of each array of antenna subarrays; and 4, compensating the initial phase data of each antenna subarray based on the first compensation value and the second compensation value. The method has the advantages that the side lobe level and the difference zero depth of the directional diagram can be effectively improved through sub-array level phase compensation, the linear phase existing on the array surface is eliminated, the requirement of the phase compensation quantity of the phase shifter/digital transceiver component is reduced, the sub-array level phase data are extracted and compensated, the data processing quantity is effectively reduced, and the compensation efficiency is improved. On the basis of the technical scheme, the invention can be improved as follows. Further, acquiring the initial phase data of each antenna subarray in the radar array surface comprises acquiring the initial phase of a phased array antenna through a near field test system, and obtaining the initial phase data of each antenna subarray according to the initial phase. Further, the first compensation value is expressed by a first formula: The first formula is: Phi py＝kpy+bp, wherein phi py is a first compensation value of the sub-array phase of the p-th row and the y-th column, k p is a curve slope fitted according to the p-th row phase data, y is the array coordinate of the sub-array, and b p is a curve intercept fitted according to the p-th row phase data. Further, the second compensation value is expressed by a second formula: the second formula is: Phi qy＝kqy+bq, wherein phi qy is a second compensation value of the sub-array phase of the qth column and the xth row, k q is a curve slope fitted according to the qth column phase data, x is the row coordinates of the sub-array, and b q is a curve intercept fitted according to the qth column phase data. Further, the method further comprises the following steps: And 5, obtaining the minimum value in the initial phase data of all the antenna subarrays, subtracting the minimum value from the initial phase data of each antenna subarray, and finishing the secondary compensation of the initial phase data of the antenna subarrays. The invention solves the technical problems as follows, and the subarray-level limited phase interval initial phase compensation system comprises: the acquisition module is used for acquiring initial phase data of each