等离子鞘套中毫米波大气窗口的衰减特性  

Attenuation properties of millimeter wave atmospheric window propagation in plasma sheath

作　　者：蒋金[1,2] 王志功[2] 陈长兴[1] 张航[3] 吴琳娜[4] 王晓东[1] 林兴[1] 文志军[1] 

机构地区：[1]空军工程大学理学院,西安710051 [2]东南大学信息科学与工程学院,南京210096 [3]北京航空航天大学电子信息工程学院,北京100191 [4]中国科学技术大学信息科学技术学院,合肥230026

出　　处：《强激光与粒子束》2016年第8期79-84,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(61534003;61401097);陕西省自然科学基础研究计划项目(2014JM8344);空军工程大学研究生创新基金项目(LY2015YJS06)

摘　　要：为了探索出减缓飞行器在临近空间出现的通信"黑障"问题,结合毫米波大气窗口在大气传输的优越性,根据RAM C提供的飞行试验数据,建立双指数分布、Epstein分布和高斯分布三个等离子体鞘套模型,用Z-FDTD算法计算毫米波大气窗口在等离子体鞘套中传播的衰减特性。综合分析可得:可采用35GHz所在的Ka频段和以220GHz所在的太赫兹频段的双频测控工作通信系统,此搭配可较好满足对高超声速飞行器在临近空间巡航时的测控需求。With the research and development of hypersonic vehicles technology,the issues of ionization blackout have become increasing prominent during hypersonic flight.And there is the superiority of millimeter wave atmospheric window in atmospheric transmission.According to the data provided by radio attenuation measurement C（RAM C）voyage experiment,double-exponential distribution,Epstein distribution and Gaussian distribution models of plasma sheath were established.The principle of interaction between atmospheric window of millimeter wave and plasma was analyzed through Z-FDTD algorithm,getting the attenuation properties of atmospheric window of millimeter wave propagation in plasma sheath.The analysis by synthesis shows that the 35 GHz,the window of atmosphere in Ka waveband can be selected as communication waveband used in near space main communication platform,and subsidiary of 220 GHz in terahertz waveband airspace-based communication platform.It will carry on the real-time measurement and control when the reentering vehicles and hypersonic aerocraft voyage in the near space.

关 键 词：临近空间 等离子体鞘套 毫米波大气窗口 太赫兹技术 

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]