水平电偶极子在涂敷介质层的导电基底上激起的场

Electromagnetic field of a horizontal electric dipole over a perfect conductor coated with a dielectric layer

对水平电偶极子在涂敷介质层的理想导电基底上激起的电磁场进行了讨论 ,获得了包含磁型波分量和电型波分量的场的解析表达式 ,并对磁型表面波的传播特性进行了分析和数值计算。分析表明 ,当满足一定条件时 ,磁型表面波才能被激励。文献 [1]所给出的结论是此文的一种特殊情况 。

The simple asymptotic expressions of the electromagnetic field induced by a horizontal electric dipole over a perfect conductor coated with a dielectric layer have been obtained. In this paper, the surface wave of electric type and the surface wave of magnetic type have been discussed, and the surface wave of magnetic type has been analyzed and computed by using numerical methods. The analysis shows that the surface wave of magnetic type can only be excited as k 2 1-k 2 0·l >0.5π. The result obtained in reference is a special example of this paper with a specific condition, and the expressions of the field in this paper are more generalized.