Array-antenna phase-congruency measuring method based on optical path difference correction

Abstract

The invention discloses an array-antenna phase-congruency measuring method based on optical path difference correction, and relates to antenna testing. The array-antenna phase-congruency measuring method includes the following steps that 1, an antenna test system is built, and a to-be-measured array antenna and a transmitting antenna need to be located on a same horizontal plane; 2, all antenna units are test, and original phase-directional-pattern test data of all the units is obtained; 3, the original phase-directional-pattern test data of all the units is subjected to optical path difference correction through the optical path difference correction formula, and primarily-corrected phase direction patterns are obtained; 4, the value of the parameter d0, the value of the parameter delta and the value of the theta 0 when the root-mean-square error of the whole array-antenna phase congruency is minimum are obtained with the optical path difference correction algorithm; 5, the phase direction patterns after the parameters of all the units are corrected and the phase root-mean-square errors of all the units are calculated. The phase direction patterns of multiple unit antennas are directly measured under the condition that the array positions of all the unit antennas do not need to be moved, and the array-antenna phase-congruency measuring method has the quite good inhibiting effect on measuring errors and has the quite good correction performance.

Description

technical field [0001] The invention relates to antenna testing, in particular to an array antenna phase consistency measurement method based on optical path difference correction. Background technique [0002] The phase consistency of unit antennas is the main technical index to measure array antennas such as direction-finding interferometers [1]. The principle of interferometer direction finding is to use the phase difference value received by the antenna unit to calculate the incoming wave direction [2], so the consistency of the unit antenna phase plays a vital role in the direction finding accuracy of the direction finding interferometer. In order to ensure the phase consistency of each element antenna in different directions, it is usually necessary to measure the phase pattern of the element antenna. [0003] The measurement of the antenna phase pattern is closely related to the phase center of the antenna [3]. At present, there are relatively few methods for detecti...

AI Technical Summary

Problems solved by technology

[0018] The purpose of the invention is to solve the measurement unit antenna direction Figure 1 It provides an array antenna phase consistency measurement method based on optical path difference correction that can directly measure multiple element antennas without moving the array position for each element antenna.

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