基于特征模理论的天线等效电路分析-Vol．.PDF

Altair2015 技术大会论文集 基于特征模理论的天线等效电路分析 Analysis For Circuit Equivalent Modal Of Antenna Based On Characteristic Modes Approach 李娜 侯建强 (西安电子科技大学微波研究所、西安、710071) 库 摘要:本文在应用特征模理论简化分析天线模式的基础上，提出了一种综合高斯滤波器原理 设计天线等效电路的方法。首先用Altair 公司的FEKO 软件的特征模分析得到模式 1 和模式 3 为对称振子天线的主要辐射模式，再根据每个模式的模式系数图形设计带通滤波器等效电 例 路，最后将两个模式的带通滤波器等效电路并联起来就是对称振子天线的等效电路。将得到 的等效电路的仿真结果与原天线的仿真结果相比，在带宽和阻抗等方面都很一致。 案 关键词:特征模理论，FEKO 仿真，高斯滤波器，天线等效电路 E Abstract :Based on Simplifying the antenna modes through the application of A characteristic modes approach, we propose a novel method which synthesize the Gauss C filter to design antenna equivalent circuit. We take the dipole antenna as an example to expound the method. Firstly, from the analysis of the characteristic modes approach 模 andthe simulation results of FEKO, mode 1 and mode 3 are found to be the main radiation modes for a dipole antenna. And then, band pass filter equivalent circuits are designed in 凯 the light of the modal coefficient graphs of each mode. Finally the two band pass filter O equivalent circuits of mode 1 and mode 3 can be combined in parallel to be the equivalent E circuit of the dipole antenna. The results of the equivalent circuit are quite consistent with M the original antenna for the bandwidth and impedance. Key words: characteristics modes approach, FEKO simulation, Gauss filter, antenna A equivalent circuit C 1 简介 随着无线