等离子体鞘套对北斗卫星信号传输影响分析  

Effects of Plasma Sheath on Bei Dou Signal Propagation Characteristics

作　　者：周天翔[1] 陈长兴[1] 蒋金[1] 

机构地区：[1]空军工程大学理学院,陕西西安710051

出　　处：《计算机仿真》2016年第6期72-75,共4页Computer Simulation

基　　金：陕西省自然科学基础研究计划项目(2014JM8344)

摘　　要：飞行器穿越大气层时,表面覆盖的等离子体鞘套会对通信信号的传播产生影响,甚至造成通信黑障。现实中通过实验分析等离子体鞘套对北斗卫星信号传输影响十分困难。从电磁波在等离子体中的传播理论出发,分析建立了等离子体鞘套与北斗卫星制导信号相互作用的数学模型;利用数值分析方法考察了各种因素对北斗卫星制导信号传播特性的影响。得到了均匀非磁化等离子体中北斗卫星制导信号的频率、等离子体密度、等离子体碰撞频率和等离子体厚度的变化规律。仿真结果表明,可以为解决通信黑障问题提供参考。The plasma sheath covered on BeiDou satellite can affect communication signal propagation greatly when it passes through atmosphere, which may causes ＂communication blackout＂. To solve this problem, based on the theory that explains how electromagnetic wave propagates in plasma, the paper established a physical plasma model that describes the interaction between plasma sheath and signal. Method of numerical analysis was used. The variables of thickness, collision frequency and electron density of plasma were used in simulation to affect the propa- gation characteristics of BeiDou Navigation Satellite System（BDS） signals. The simulation result can contribute to the study on communication blackout.

关 键 词：等离子体鞘套 通信黑障 北斗卫星 

分 类 号：TN011[电子电信—物理电子学] V271[航空宇航科学与技术—飞行器设计]