等离子体对毫米波散射机理研究  

Research on Millimeter-wave Scattering Property of Plasma

作　　者：张紫浩[1] 高鹏[1] 欧阳吉庭[2] 赵日康 ZHANG Zi-hao;GAO Peng;OUYANG Ji-ting;ZHAO Ri-kang(Science and Technology on Electro-Optical Information Security Control Laboratory, Tianjin 300308, China;Beijing University of Science and Technology, Beijing 100081, China)

机构地区：[1]光电信息控制和安全技术重点实验室,天津300308 [2]北京理工大学,北京100081

出　　处：《光电技术应用》2017年第6期60-66,共7页Electro-Optic Technology Application

摘　　要：等离子体与电磁波的相互作用,主要体现在等离子体对入射电磁波的反射、吸收、色散和调制上。介绍了等离子体的特点及等离子体对电磁波传输的影响,利用有限时域差分法(FDTD)建立了模型,调整等离子体的主要表征参数,模拟分析了均匀/非均匀等离子体圆柱对入射毫米波的散射物理机制和传输特性影响。结果表明,等离子体密度决定其频率和碰撞频率,而等离子体的频率和碰撞频率是影响其电磁散射特性的主要因素。The interaction between plasma and electromagnetic wave mainly lies in four aspects,the incident electromagnetic wave′s reflection,absorption,dispersion and modulation by plasma.The features of plasma and its effect on electromagnetic wave propagation are introduced.Simulation model is built based on finite difference time domain(FDTD)method.Adjusting characterization parameters of plasma,the effects on the scattering physical mechanism and propagation characteristics of incident microwave from symmetrical and asymmetrical plasma cylinders are simulated and analyzed.Simulation results show that frequency and collision frequency of plasma are determined by its density,while frequency and collision frequency are the main elements that influence plasma′s electromagnetic scattering characteristics.

关 键 词：等离子体 毫米波散射 FDTD 均匀等离子体圆柱 非均匀等离子体圆柱 

分 类 号：TN972.4[电子电信—信号与信息处理]