Asymptotic Solutions ol Transient Electromagnetic Waves in Lossy Media

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- Asymptotic Solutions ol Transient Electromagnetic Waves in Lossy Media
- Acta Electronica Sinica Issue 6, Pages: 65-71(1993)
- 作者机构：
  
  电子科技大学,成都,610054
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1993
- 稿件说明：
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[1]阮成礼.有耗媒质中瞬态电磁波的渐近解[J].电子学报,1993(06):65-71.

Rusn Chengli. Asymptotic Solutions ol Transient Electromagnetic Waves in Lossy Media[J]. Acta Electronica Sinica, 1993, (6): 65-71.
[1]阮成礼.有耗媒质中瞬态电磁波的渐近解[J].电子学报,1993(06):65-71. DOI：

Rusn Chengli. Asymptotic Solutions ol Transient Electromagnetic Waves in Lossy Media[J]. Acta Electronica Sinica, 1993, (6): 65-71. DOI：

本文讨论了有耗媒质中的瞬态电磁波

直接从Maxwell方程出发导出波方程

应用边界层理论求解包络的波方程

得到关于包络的渐近解。媒质的损耗使波数成为一个复数

它的虚部表示损耗

分析表明:K

=Zσ/4

瞬态电磁波的衰减因子为exp[K

（u-v）]=exp（-σt/2ε）

衰减仅与传播时间有关

衰减使场型变模糊。

The transient of eletromagnetic waves have been discussed in this paper.Using the boundary-layer theory

the asymptotic solutions of the overlap wave equation are obtained.The wave number is a complex

its image part due to loss of medium denotes the loss of transient electromagnetic waves.Analysis shows that

Maxwell equations are still true in case of transient for lossy medium.Attenuation factor of transient EM waves is exp （-σt /2ε）

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