瞬态电磁波在色散介质中传播与散射的FD－TD方法  

FD-TD Method for Studying Transient Electro-Magnetic Waves Propagating and Dispersing in Chromatic Dispersion Media

作　　者：傅海威[1] 段哲民[1] 

机构地区：[1]西安石油学院基础课部,西北工业大学

出　　处：《西安石油学院学报》1996年第4期48-50,共3页Journal of Xi'an Petroleum Institute

摘　　要：针对强色散的等离子体，从电磁场作用下等离子体的微观机制出发，推导出了一套时域有限差分（ＦＤ－ＴＤ）计算公式．克服了卷积递归法不适用于入射脉冲中含有直流分量和较大信号入射的情况，其正确性由计算一维情况下，介质板中沿纵向传播的波的反射，透射系数的幅频特性得到验证．In view of the plasma of strong chromatic dispersion and proceeding from the microcosmic mechanism of plasma affected by electro-magnetic field,a set of time domain finite difference equations were derived.This has overcome the defects of recursive convolution methodd which is not suitable for the incident pulse with D. C component and incidence of big signals. The correctness of this method has been demonstrated by the amplitude-frequency characteristics of reflection and transmission coefficient of the waves propogating in the media.

关 键 词：色散介质 电磁波 FD-TD法 

分 类 号：TN011[电子电信—物理电子学]