摘要
利用电磁波在导电媒质界面反射系数的附加相角,导出了电场垂直于入射面的非均匀电磁波在导电介质界面的类全反射横向偏移,并对横向偏移进行了相关计算,绘出了横向偏移随入射角的变化曲线.结果表明:入射角在相移常数临界角、衰减常数临界角和90°处,横向偏移曲线存在三个间断点.当入射角等于这三个角时,横向偏移为无穷大,即电磁波将沿界面传播;当入射角在这三个角附近时,横向偏移变得非常大.
According to the phase difference of reflection coefficients, we derive the lateral shift of quasi total reflection of inhomogeneous electromagnetic wave when the electric field is perpendicular to the incident plane. At the same time, we calculate the shift of low frequency electromagnetic wave and draw the curves which vary with the incident angle. The results show that there are three discontinuity points at the critical angle of the phase constant, the critical angle of attenuation constant and 90°. When the incident angle equals one of the three angles, the lateral shift will become infinite, i.e. the electromagnetic wave will propagate along the interface. When the incident angle is around the three angles, the lateral shift is very large.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第4期924-931,共8页
Chinese Journal of Geophysics
基金
北京印刷学院信号与信息处理重点建设学科项目
中国科学院知识创新重大项目(KZCX1-SW-18-04)
北京市教育委员会科技发展计划面上项目(KM200510015003)
北京印刷学院引进人才科研项目联合资助.
关键词
横向偏移
类全反射
非均匀电磁波
相移角
导电媒质
Lateral shift, Quasi total reflection, Inhomogeneous electromagnetic wave, Phase angle, Conductive medium
