摘要
介绍了等离子体对电波传播的影响．阐述了电磁波在等离子体中的截止现象．这就是电离层作为地面上短波无线电通信的反射层的原理．
The influence of plasma upon the propagation of electric wave is introduced. The cut off phenomenon of electromagnetic wave travelling in plasma is presented. This is the principle of ionosphere acted as reflector for short wave communication. Meanwhile the difference and relationship between cut off frequency and the maximum frequency of communication is pointed out.
出处
《大学物理》
1998年第11期27-29,共3页
College Physics
关键词
等离子体
电离层
截止现象
短波通信
卫星通信
plasma
ionosphere
cut off phenomenon
short wave communication
satellite communication
