通过复数几何光学对一种天线面型诊断方法的改进  

Improvement on an antennas surface diagnosis method by using complex geometrical optics

作　　者：姚强 金惠良[1] 叶骞[1] Yao Qiang;Jin Huiliang;Ye Qian(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《高技术通讯》2021年第2期180-187,共8页Chinese High Technology Letters

基　　金：国家自然科学基金(U1931137)资助项目。

摘　　要：通过天线所辐射的电场幅值来求解天线面形变是一种新的天线面型诊断方法,但是由于该方法基于实数几何光学(RGO),忽略了高斯馈源的影响,从而导致了一定的误差。本文通过复数几何光学(CGO)对高斯馈源所发射的电磁波的复数相位进行了研究,推导得出了较准确的天线面形变和天线辐射场幅值之间的关系表达式。在此基础上,提出了一种迭代算法来求解天线面形变,仿真结果表明该方法可以有效提高天线面形变的求解精度。Using the amplitude of electric field radiated from antennas to retrieve surface deformation of antennas is a new surface diagnosis method.However,this method is based on real geometrical optics(RGO)which ignores the influence of Gaussian feed.This article utilizes complex geometrical optics(CGO)to analyze the complex phase of electromagnetic wave radiated from Gaussian feed and derives an accurate functional relationship between surface deformation and amplitude value.An iterative algorithm is proposed to solve that function.Simulation result shows that the surface deformation of antennas retrieved by the proposed algorithm can reach a high level of accuracy.

关 键 词：实数几何光学(RGO) 复数几何光学(CGO) 反射天线 高斯馈源 表面形变 

分 类 号：TN820[电子电信—信息与通信工程]