基于MoM-UTD混合方法的阻抗矩阵插值快速扫频技术  

Fast frequency sweep technology using impedance matrix interpolation based on hybrid MoM-UTD method

作　　者：刘子梁[1] 杨娟[1] 张玉[1] 梁昌洪[1] 

机构地区：[1]西安电子科技大学天线与微波国家重点实验室,陕西西安710001

出　　处：《电波科学学报》2007年第2期299-302,335,共5页Chinese Journal of Radio Science

摘　　要：MoM-UTD混合方法是一种分析电大平台上天线问题的有效方法。在用该方法分析机载平台上天线间隔离度的频率特性时,由于每一个频点都需要重新计算阻抗矩阵,因此分析整个频带内隔离度的计算量很大,耗时很长。基于此,笔者将阻抗矩阵插值技术引入MoM-UTD混合方法,只直接计算频率间隔较大几个离散频点的阻抗矩阵,频带内其它频点的阻抗矩阵通过对每一个矩阵元素插值得到,从而实现了隔离度的快速扫频,大大减少了计算量,缩短了计算时间。The hybrid MoM-UTD （moment method and the uniform theory of diffraction） is an effective method to analyze the problem of antennas on an electrically large platform. The MoM-UTD method is employed to analyze the frequency characteristic of isolation between antennas on airborne platform, however, it has large calculation amount and takes a long time, since the impedance matrix must be computed for each new frequency. In this paper, impedance matrix interpolation is introduced into the hybrid MoM-UTD method. Only a few matrices at relatively large frequency intervals are directly computed and the matrices at the intermediate frequencies are obtained by interpolation of each element. Fast frequency sweep is achieved with great reduction the calculation amount and the computation time.

关 键 词：阻抗矩阵插值 MoM-UTD 机载平台 隔离度 

分 类 号：TN820[电子电信—信息与通信工程]