导电介质中电磁波相移常数与振幅衰减常数的方向关系的讨论  

A discussion about the relation of directions of phase constant and attenuation constant in conductive media

作　　者：刘汉平[1] 卢霏[1] 刘祥志[1] 张瑞峰[1] 

机构地区：[1]山东大学信息科学与工程学院,山东济南250100

出　　处：《大学物理》2008年第4期10-12,共3页College Physics

摘　　要：对文献上给出的非均匀电磁波在同一均匀导电介质中传播时,电磁波的相移常数和振幅衰减常数方向之间满足定量关系的结论,重新进行了分析和推导,利用电磁波在导电介质界面的边界条件,给出了两种情况下的相移常数和振幅衰减常数的表达式,以及它们与界面法线的夹角正弦的表达式.结果表明,在同一均匀导电介质中,非均匀电磁波的相移常数的方向和振幅衰减常数的方向之间一般不满足定量关系.The conclusion is analyzed and deduced again, which was presented in the reference that the phase constant and amplitude attenuation constant of electromagnetic wave satisfies constant relation when the inhomogeneous electromagnetic wave propagates in same and homogeneous conductive medium. Based on the boundary conditions of electromagnetic wave at the interface of conductive media, the expression of phase constant, amplitude attenuation constant and the sine of the angle between two constants and the interface normal are derived under two conditions. The results show that the phase constant and attenuation constant of electromagnetic wave doesn＇t satisfy constant relation when the electromagnetic wave propagates in same conductive medium, generally speaking.

关 键 词：非均匀电磁波 相移常数 振幅衰减常数 

分 类 号：O441.4[理学—电磁学]