| 电磁波在不均匀尘埃等离子体中的衰减特性 |
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| 引用本文： | 李海英,孔鹏飞,詹捷,吴振森,白璐. 电磁波在不均匀尘埃等离子体中的衰减特性[J]. 电波科学学报, 2016, 31(4): 654-658. DOI: 10.13443/j.cjors.2015111301 |
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| 作者姓名： | 李海英 孔鹏飞 詹捷 吴振森 白璐 |
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| 作者单位： | 1.西安电子科技大学物理与光电工程学院, 西安 710071 |
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| 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.
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| 关 键 词： | 尘埃等离子体 WKB近似方法 衰减 |
| 收稿时间： | 2015-11-13 |
Attenuation characteristics of electromagnetic waves in nonuniform dust plasma |
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| Affiliation: | 1.School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China2.Collaborative Innovation Center of Information Sensing and Understand at Xidian University, Xi'an 710071, China |
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| Abstract: | Based on Wenzel, Kramers, Brillouin(WKB) approximation method, the attenuation characteristics of high-frequency electromagnetic waves in nonuniform dust plasma are studied. Numerical results 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 electron number density distribution, attenuation characteristics of electromagnetic waves with different incident angles are analyzed, and the effects of incident angles, electron number density, and radius and number 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. |
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| Keywords: | dust plasma WKB approximation method attenuation |
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