电磁波在等离子体中的衰减特性  

Attenuation properties of electromagnetic wave in plasmas

作　　者：宫琬钰[1] 沈崇丰 龚之珂[1] 尹增谦[1] 

机构地区：[1]华北电力大学数理系,河北保定071003

出　　处：《河北大学学报（自然科学版）》2014年第2期148-153,共6页Journal of Hebei University(Natural Science Edition)

基　　金：中央高校基本科研业务基金资助课题(10ML40)

摘　　要：从理论上研究了不同密度下大气压等离子体中正负离子、电子对电磁波衰减的影响,对电磁波的吸收、反射和透射功率特性进行了分析.结果表明,在大气压条件下,当正负离子浓度超过电子浓度的1×104倍以上时,正负离子对电磁波在等离子体中衰减特性的影响非常显著,同时给出了电磁波在等离子体中的吸收峰值和带宽,所得结果为用于隐身目的的等离子体参量的选择提供了重要依据.The absorption, reflection, and transmission of electromagnetic waves in atmosphere plasma have been studied analytically. The effects of positive ions, negative ions and electrons in plasmas on the power absorption are discussed under atmosphere conditions. The results show that the existence of posi- tive ions, negative ions significantly influence the power absorption of the electromagnetic wave when the positive ions, negative ions are more than electrons concentration of ten thousand times. Meanwhile, the peck and bandwidth of absorption of electromagnetic waves in the plasma have been obtained. The results is important for selection of plasma parameter in the plasma stealth.

关 键 词：电磁波 大气等离子体 衰减系数 

分 类 号：O53[理学—等离子体物理]