电磁波在不均匀尘埃等离子体中的衰减特性  

Attenuation characteristics of electromagnetic waves in nonuniform dust plasma

作　　者：李海英[1,2] 孔鹏飞[1] 詹捷[1] 吴振森[1,2] 白璐[1,2] 

机构地区：[1]西安电子科技大学物理与光电工程学院,西安710071 [2]西安电子科技大学信息感知技术协同创新中心,西安710071

出　　处：《电波科学学报》2016年第4期654-658,共5页Chinese Journal of Radio Science

摘　　要：基于WKB近似方法,研究了高频电磁波入射不均匀尘埃等离子体中的衰减特性.对弱电离尘埃等离子体复相对介电常数的分布特征进行了分析,讨论了电子数密度、尘埃颗粒数密度对复相对介电常数虚部的影响.利用电子密度分布的抛物模型,数值计算了电磁波以不同角度入射不均匀尘埃等离子体的衰减特性,对入射角、电子数密度、尘埃颗粒半径和尘埃颗粒数密度对衰减系数的影响进行了分析.结果表明:随着电子数密度、尘埃颗粒数密度和半径增大,衰减系数也会变大.Based on Wenzel, Kramers, Brillouin（WKB） approximation method, the attenuation char- acteristics of high-frequency electromagnetic waves in nonuniform dust plasma are studied. Numerical re- sults of complex relative dielectric constant of weakly ionized dust plasma are presented, and the effects of electron number density, dust number density on imaginary part are given. With parabolic model of elec- tron number density distribution, attenuation characteristics of electromagnetic waves with different inci- dent angles are analyzed, and the effects of incident angles, electron number density, and radius and num- ber density of dust plasma are discussed. The result shows that attenuation factors are increasing with electron number density, radius and number density of dust plasma.

关 键 词：尘埃等离子体 WKB近似方法 衰减 

分 类 号：O451[理学—无线电物理]