非均匀电磁波在导电媒质界面反射的横向偏移

The lateral shift of inhomogeneous reflected electromagnetic wave on the interface of conductive media

由电磁场边值关系给出了非均匀电磁波在导电媒质界面反射时反射系数所产生的附加相角.利用这一附加相角导出了非均匀电磁波在导电介质界面的横向偏移,并进行了横向偏移的相关计算,绘出了横向偏移随入射角的变化曲线.结果表明:在导电媒质界面反射电磁波的横向偏移随入射角的增大而增大,当入射角接近90°时,电磁波在界面要传播较长时间后才返回第一种媒质.在同一入射角电场偏振化方向在入射面的电磁波要比电场偏振化方向垂直于入射面的电磁波的横向偏移大,随着电磁波频率的增加横向偏移变小.

For inhomogeneous electromagnetic wave, we use the phase shift of the reflection coefficient on the interface of conductive media to derive the lateral shift of reflected electromagnetic wave, and draw the curves of lateral shift. The results show that the lateral shift increases with the increasing incident angle. As the incident angle approaches 90°, electromagnetic wave will propagate for a long distance before returning to the first medium. When the incident angles are the same, the lateral shift of the electromagnetic wave whose polarization direction of electric field is in the incident plane will be longer than that whose polarization direction of electric field is perpendicular to the incident plane. With the frequency increasing, the lateral shift becomes smaller.