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Amplitude-phase calibration method for antenna unit in planar or cylindrical phased array radar

A technology of phased array radar and antenna unit, which is applied in radio wave reflection/re-radiation, radio wave measurement system, utilization of re-radiation, etc. It can solve the problem of limiting the work progress and accuracy of test calibration, high requirements for operators, and difficult operation cumbersome and other problems, to achieve the effect of eliminating human error, reducing professional requirements and workload, and simple operation

Active Publication Date: 2017-07-28
NO 27 RES INST CHINA ELECTRONICS TECH GRP
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AI Technical Summary

Problems solved by technology

The method of manual calibration and recording is cumbersome and time-consuming, requires high requirements for operators, and is extremely error-prone, which limits the progress and accuracy of the test calibration work in the later stage of radar system development

Method used

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  • Amplitude-phase calibration method for antenna unit in planar or cylindrical phased array radar

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Embodiment approach

[0032] Such as figure 1 As shown, as the first preferred embodiment of the present invention, the present invention mainly includes the following steps:

[0033] A: According to the physical parameters of the phased array radar to be tested, the central control computer establishes a logical array corresponding to the space and position of the antenna array of the phased array radar to be tested: the physical parameters include the rows of antenna elements in the antenna array Number M, number of columns N, row spacing l m , column spacing l n And the frequency point group to be checked of the antenna unit, calculate the number S=M*N of the antenna unit in the antenna array according to the number of rows M and the number of columns N;

[0034] The technicians input the measured physical parameters into the central control computer, and the central control computer generates a logical array with the number of rows M, the number of columns N, and the number of nodes s=M*N. Ac...

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Abstract

The invention discloses an amplitude-phase calibration method for an antenna unit in a planar or cylindrical phased array radar. The replacement of human operation with a program-controlled machine is realized by way of replacing an array plane of a phased array radar with a logic array plane and cooperating with a center control computer in the control of a sampling probe and a rotary table, the workload of technical staff and the professional requirement for the technical staff are reduced, the operation is easy, and the precision and efficiency of calibration are greatly improved. Meanwhile, the center control computer is used to control the reception and transmission of a signal source and comparison and screening of response signals, the amplitude and phase information of each antenna unit are automatically recorded and compared, the manual recording is replaced, the influence of manual operation errors is substantially eliminated, the precision and efficiency of the calibration are improved, the whole calibration process is highly efficient and simple without additional interference of operation staff, the professional requirement and workload of the operation staff are greatly reduced, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of phased array radar antenna calibration, in particular to a method for calibrating the amplitude and phase of an antenna unit in a planar or cylindrical phased array radar. Background technique [0002] Phased array radar, also known as phased array radar, is a radar that changes the beam direction by changing the phase of the radar wave. Because it controls the beam electronically instead of the traditional mechanical rotation of the antenna surface, it is also called electronic scanning radar. The antenna front of a phased array radar is composed of many antenna units regularly arranged on the front. The number of antenna units is related to the function of the radar, and can range from hundreds to tens of thousands. In addition to the antenna vibrator, each antenna unit also has a channel composed of necessary devices such as a phase shifter. Using the principle of electromagnetic wave coherence, the ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/40G01S7/4004G01S2013/0245
Inventor 舒应超赵云吴禄军姚卓民马静李乔
Owner NO 27 RES INST CHINA ELECTRONICS TECH GRP
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