PDF文档，介绍了等离子体覆盖下，单极天线的各项参数，得到等离子频率也发射电压和谐振频率偏移的关系。文章采用的分析方法是时域有限差分法。-PDF document, presented under the coverage of plasma, the parameters of a monopole antenna, the frequency of emission by the plasma voltage and resonant frequency shift of the relat