超宽带TEM喇叭天线阻抗加载的时域分析

超宽带TEM喇叭天线阻抗加载的时域分析

内容简介：基于时域有限差分法中的阶梯近似方法,分析了超宽带TEM喇叭天线辐射场的时域波形.为了改善宽带TEM喇叭天线拖尾效应,文中利用集总元件的时域有限差分法,详细分析了不同阻抗加载条件下TEM喇叭天线辐射场的时域波形.计算机模拟结果表明,加载吸收电阻可以有效地解决TEM喇叭天线由于低频反射引起的拖尾振荡,改善辐射电场的波形特性.

Abstract：The staircase approximation of time domain finite difference method (FDTD) can directly be used to analyze the instan-taneous radiation characteristics of an ultra wide band (UWB) TEM horn antenna in time domain. In order to cope with the tail effect caused by the reflection from horn antenna, the FDTD method with lumped elements is used to analyze the waveform of the e-lectric fields which is radiated by UWB TEM horn antenna with different impedance loaded. The simulation results prove that load-ing absorptive resistance can effectively cope with the tail effect caused by the reflection of horn antenna and improve the waveform of radiated electric fields.

作者：陈聪, 高火涛, 秦晨清,

关键词：超宽带, TEM喇叭天线, 时域有限差分法, 阻抗加载,