垂直电偶极子在涂有介质层球形导电基底上的场

The electromagnetic field of a vertical electric dipole over a spherical conductor covered by a dielectric layer

利用解析方法导出了垂直电偶极子在涂覆有介质层的球形导电基底上产生的电磁场的解析表达式。所得结果表明 ,当介质层达到一定的厚度时 ,与文献 [1]中的平面导电基底情况相类似 ,垂直电偶极子同样能够在球形介质层的表面激励起吸附表面波 (Trappedsurfacewave)。文中对具有特殊地貌情况下和有冰层的海面上的通信有新的指导意义。

The analytical expressions of electromagnetic fields of a vertical electric dipole (VED) over a spherical conductor covered by a dielectric layer have been developed in this paper. The analytical and numerical results indicate that the trapped wave can be efficiently excited by a VED if the depth of the dielectric layer is to go beyond a certain value. The presented conclusions may be used in communicating over the earth covered with the special physiognomy and the sea covered by a layer of ice.