Deformation reflector antenna phase center correction method based on far field

Abstract

The invention discloses a deformation reflector antenna phase center correction method based on a far field. The method mainly solves the problems that in the prior art, structure deformation simulation is not accurate and experience on which feed source adjustment can rely is not enough. According to the technical scheme, firstly, phase difference of a deformation reflector aperture face is expressed with a best matching parameter; secondly, the phase difference is put into a far field calculation formula and expanded on the basis of a first order of Taylor series, and sensitivity of antenna far filed intensity to the best matching parameter is deduced; thirdly, according to the sensitivity information, the far field intensity and the best matching parameter form a linear equitation system; according to the measured far filed intensity, the linear equitation system is solved on the basis of an MATLAB left dividing operation, and a least square solution of the best matching parameter is obtained; fifthly, according to the least square solution, phase center correction amount is calculated, and feed source adjustment is guided. The deformation reflector antenna phase center correction method based on the far field can effectively calculate the phase center adjustment amount of a deformation reflector antenna and be used for adjusting a feed source of the deformation reflector antenna.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a method for correcting the phase center of a deformed reflector antenna based on a far field. Applied to phase center correction or feed adjustment of deformed reflector antenna. Background technique [0002] Microwave antenna is a typical electromechanical combination equipment, and reflector antenna is the most widely used one. With the development of science and technology, planar antennas are developing in the direction of high frequency, high gain, and large aperture. The deformation caused by external loads, such as heat, gravity, and wind, seriously deteriorates the electrical performance of the antenna. [0003] In order to ensure the electrical performance of the antenna, certain measures must be taken to reduce the influence of the deformation of the reflector on the electrical performance. The simplest compromise method is to find a reasonable panel installation ad...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the above existing methods, and propose a method for correcting the phase center of the deformed reflector antenna based on the far field, so as to realize the adjustment of the feed source or the secondary surface when the deformation of the reflector is unknown, and complete the adjustment of the antenna phase. Compensation of main surface deformation

Images