导电介质中电磁波相移常数与振幅衰减常数的方向关系

大学物理 ›› 2006, Vol. 25 ›› Issue (2): 9-9.

导电介质中电磁波相移常数与振幅衰减常数的方向关系

刘福平[1,2] 王安玲[1] 杨长春[2]

[1]北京印刷学院基础部,北京102600 [2]中国科学院地质与地球物理研究所,北京100029

出版日期:2006-02-25 发布日期:2006-02-20

The relation of directions of phase constant and attenuation constant in conductive media

Online:2006-02-25 Published:2006-02-20

摘要/Abstract

摘要： 基于非均匀电磁波在导电介质中传播时其相移常数方向和振幅衰减常数方向的不一致性，利用电磁波在导电介质界面的边界条件，给出了非均匀电磁渡相移常数和振幅衰减常数方向的关系．结果表明，在同一均匀导电介质中非均匀电磁波相移常数和振幅衰减常数方向间满足定量关系。引起电磁波相移常数和振幅衰减常数方向改变的原因是导电介质的改变，在折射波中存在这种方向的改变，导电介质的界面是方向的突变界面．同时还通过几个特例对在层状多层介质中传播的电磁波进行了分析．

关键词: 非均匀电磁波, 相移常数, 衰减常数

Abstract: Basing on the difference of directions of phase constant and attenuation constant when the electromagnetic wave propagates in conductive medium, using the boundary conditions of electromagnetic wave at the interface of conductive media, the relation equation about directions of phase constant and attenuation constant is derived. The results show that φ and φ satisfy sin φ/sin φ =Ac, where φ and φ are the angles between phase con sin stant, attenuation constant and the normal of the interface respectively, Ac is a constant. The results also indicate the changes of directions of phase constant and attenuation constant are caused when the electromagnetic wave is refracted from one medium into another, and the changes occur on the conductive interface, several examples about layer conductive media are analysed too.

Key words: inhomogeneous electromagnetic wave, phase constant, attenuation constant

中图分类号:

P631

刘福平[;] 王安玲[] 杨长春[]. 导电介质中电磁波相移常数与振幅衰减常数的方向关系[J]. 大学物理, 2006, 25(2): 9-9.