基于球谐函数天线间相互影响快速分析方法  

Fast analytical method for radiator interaction between antennas based on spherical harmonics

作　　者：关闯[1] 毕军建[1] 王玉明[1] 谢鹏浩[1] 

机构地区：[1]军械工程学院电磁环境效应重点实验室,石家庄050003

出　　处：《电波科学学报》2016年第6期1165-1171,共7页Chinese Journal of Radio Science

基　　金：重点实验室基金项目(No.61422050401162205004);探索研究项目(No.71314100)

摘　　要：针对系统内多天线电磁兼容性难以快速分析和评估的问题,基于球谐函数提出了一种天线间相互影响的准确快速分析方法.由电场积分方程出发,将天线间耦合电流的计算变量引入至天线的辐射方向图上,同时利用矢量系数球谐函数对天线方向图进行分解,一方面解决了因天线姿态变化而产生的多次建模、目标剖分和数值计算问题,另一方面也解决了标量系数球谐函数在分解天线方向图产生的奇异点问题.与电磁仿真软件FEKO的仿真结果相比,该方法具有较强的准确性,且分析时间大大缩短,为多天线电磁兼容性的快速分析评估提供了技术支撑.Considering the difficulty in fast analyzing and evaluating the radiator interaction between antennas which are in the same system,a fast analytical method for radiator interaction between antennas is proposed based on vector coefficient spherical harmonics.The calculation equation of coupling current between two antennas is derived by the electric field integral equation,and it is depended on the radiation pattern of the antennas.The spherical harmonics with vector coefficients are used to decompose the radiation pattern of the antennas.On one hand,several times of antenna modeling,meshing and EM analysis are avoided if the antennas are rotated.On the other hand,the problem of singular point induced by spherical harmonics with scalar coefficients is avoided.The analytical results are in good agreement with that achieved by some commercial electromagnetic software FEKO.The analytical time is reduced obviously,which confirms the correctness and availability of this method.

关 键 词：球谐函数 天线耦合 快速计算 电磁兼容 

分 类 号：TN82[电子电信—信息与通信工程]