基于FDTD方法的电波在等离子体中传输特性  

The transmission characteristics of radio wave in the plasma based on finite difference time domain

作　　者：郭彤[1] 彭坚[1] 肖卫东[1] 

机构地区：[1]国防科技大学信息系统工程重点实验室,湖南长沙410073

出　　处：《国防科技大学学报》2013年第6期191-194,共4页Journal of National University of Defense Technology

基　　金：高等学校博士学科点专项科研基金项目(20114307110008)

摘　　要：根据时域有限差分(Finite Difference Time Domain,FDTD)法的基本原理,分析了等离子体的物理场特性及数值计算,介绍了飞行器再入时等离子鞘的形成以及等离子体相对介电常数对波的衰减,通过三维FDTD和二维FDTD模拟了电磁波在等离子体中的传播情况,证明了FDTD方法是解决电磁波在复杂媒质中传播的一种有效方法,并探究了飞行器再入段黑障区通信的理论和方法。According to the basic principles of the finite difference time domain （FDTD） method, firstly the physical field characteristics and the numerical calculation of the plasma were analyzed ; and then the reentry plasma sheath formed and plasma relative dielectric constant of the wave attenuation were introduced; lastly the propagation of electromagnetic waves in the plasma with three-dimensional FDTD method and two- dimensional FDTD method were simulated. Simulation results proved that the FDTD method is an effective method to solve the electromagnetic wave propagation in the complex medium.

关 键 词：电磁波传播 时域有限差分 等离子体 

分 类 号：TN011[电子电信—物理电子学]