Antenna phase center measuring method based on moving reference point

Abstract

The invention discloses a method for measuring the phase center of an antenna, which is based on moving reference points. The method provided by the invention mainly solves the measuring problems of manual operation and artificial judgment. The method includes the following steps: in the measuring system, a measured antenna is adjusted to face an original antenna and is taken as the zero point of a measuring angle; the horizontal direction and the vertical direction of a two-dimensional translation device are controlled to reset and taken as the datum reference point of the phase center test; related parameter information is input and all moving shafts are controlled automatically, thereby collecting the amplitude and phase data of the measured antenna; the horizontal deviation and the longitudinal deviation of the phase center can be worked out by using the least square method and then can be determined whether the deviation of the phase center meets the deviation requirements of the designed phase center of the antenna; if not, the reference point of the antenna can be changed by automatically adjusting the horizontal coordinate and the vertical coordinate of the two-dimensional translation device according to the deviation value; the test can be repeated again and again until the horizontal deviation and the longitudinal deviation meet the requirements; and the final changed reference point can be taken as the phase center of the measured antenna. The method provided by the invention can automatically and accurately measure the phase center of an antenna.

Description

technical field [0001] The invention belongs to the technical field of measurement, in particular to a method for measuring the phase center of an antenna, which can be used to accurately measure the phase center of the antenna. Background technique [0002] With the development of communication, radar, artificial satellite and aerospace technology, the requirements for the tracking and positioning accuracy of the antenna are getting higher and higher. The search and positioning of the amplitude beam alone cannot meet the requirements, and the phase center of the antenna must be used as the reference for accurate positioning. locate or measure. The phase center of the antenna is very important in many aspects, such as its phase measurement application, beam formation detection application, as an interferometer array unit and as a feed source of a parabolic antenna. The so-called antenna phase center is the equivalent radiation center of the antenna. For most antennas, ther...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems that the existing method for calibrating the antenna phase center requires constant manual adjustment of the antenna position, manual observation and judgment, time-consuming, laborious, difficult to operate, and large calibration errors, and proposes an antenna phase center measurement based on a moving reference point method to achieve precise calibration of the antenna

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