甚低频电磁波穿透地层无线通信系统天线装置的研究

Study on Antenna Equipment for Communication of Very low frequency (VLF) Electromagnetic Wave Propagation through Earth

根据甚低频电磁波在半导电媒质中的传播特点，简要介绍几种常用的甚低频天线主要电性能，分析比较其优缺点及适用场合，研究其输入阻抗、电流分布、方向特性，设计出适合本课题要求的天线装置。

The paper,accrding to the characteristic of the VLF electromagnetic wave propagation through a dissipative media,introduces the electric properties of several kinds of VLF electromagnetic wave,compares their advantages and disadvantages,and analyzes their input impandance,distributed current and direction coeffecient.Then the antenna equipment is designed,which is suitable to the demands of this project.