一种减小相控阵天线球面近场测量截断误差的方法

A method for reducing the truncation errors in spherical near-field measurements of phased array antennas

在相控阵天线球面近场测量中,有限扫描面和相控阵天线波束扫描将会引起较大的截断误差.为了解决这一问题,提出利用基于遗传算法参数优化的余弦窗函数对近场数据进行加权处理的方法来有效减小截断误差.以半波振子组成的矩形平面阵作为待测天线,对相控阵天线球面近场测量进行了计算机模拟.模拟结果表明,通过对近场数据进行加余弦窗的处理并用遗传算法对参数进行优化能够大大减小相控阵天线波束扫描时的有限扫描面截断误差,从而证实了文中所提出方法的正确性和有效性.

In spherical near-field measurements tion errors can be caused by finite scan sphere and t} solve the above problem, the weighted process meth with the parameters optimized by genetic algorithm rots. With the rectangular planar array made up of spherical near-field measurements of phased array ar lation results show that the truncation errors caused antenna scans can be greatly reduced by processing the near-field data with cosine window function and op- timizing the parameters with GA, which proves the correctness and validity of the method presented in this paper.