摘要
受电离层反射的影响,甚低频(VLF)电波传播过程中会发生干涉,再加上电波传播本身的衰减、地理环境、电离层高度等多因素影响,使得甚低频场强计算十分困难。基于地球-电离层波导的传播模型,运用波导模式理论对甚低频电波的场强进行计算。对计算结果和实测数据的对比分析表明,波导模式理论能够准确地对甚低频场强进行预测。
Reflected by ionosphere,VLF radio wave interferes on the propagation.Be affected by attenuation of wave propagation,geographic condition and the heigth of ionosphere,made it very difficult to calculate VLF field strength.This paper calculates VLF field strength using the waveguide mode theory based on earth-ionosphere waveguide propagation model.Comparison of calculation results and the filed measurement show that,VLF field strength can be predicted accurately by the waveguide mode theory.
出处
《舰船电子工程》
2009年第12期86-89,共4页
Ship Electronic Engineering
关键词
甚低频电波传播
地球-电离层波导
场强计算
VLF radio wave propagation
earth-ionosphere waveguide
field srtength caculation
