| 瞬态电磁波在色散介质中传播与散射的FD－TD方法 |
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| 引用本文： | 傅海威,段哲民.瞬态电磁波在色散介质中传播与散射的FD－TD方法[J].西安石油大学学报(自然科学版),1996(4). |
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| 作者姓名： | 傅海威 段哲民 |
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| 作者单位： | 西安石油学院基础课部，西北工业大学 |
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| 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．
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| 关 键 词： | 时间域，频率域，有限差分，傅里叶交换，等离子体，吸收边界条件，色散介质 |
FD-TD Method for Studying Transient Electro-Magnetic Waves Propagating and Dispersing in Chromatic Dispersion Media |
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| Fu Haiwei,et al.FD-TD Method for Studying Transient Electro-Magnetic Waves Propagating and Dispersing in Chromatic Dispersion Media[J].Journal of Xian Shiyou University,1996(4). |
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| Authors: | Fu Haiwei |
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| Institution: | Xi'an Petroleum Institute Xi'an 710065. China |
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| Abstract: | 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. |
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| Keywords: | Free words ]time domain frequency domain finite difference method Fourier trans form plasma/[boundary condition of absorption chromatic dispersion media ] |
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