毫米波大气窗口在临近空间等离子体鞘套中的传播特性  

Study on Atmospheric Window of Millimeter Wave Propagation in Near Space Plasma Sheath

作　　者：蒋金[1] 陈长兴[1] 周天翔[1] 凌云飞[1] 陈婷[2] 任晓岳[1] 

机构地区：[1]空军工程大学理学院,西安710051 [2]西安邮电大学电子工程学院,西安710121

出　　处：《空间科学学报》2016年第1期56-62,共7页Chinese Journal of Space Science

基　　金：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(LXY2015YJS06)共同资助

摘　　要：针对飞行器再入和以高超声速在临近空间飞行时出现的通信黑障问题,依据RAM C提供的飞行试验数据建立等离子体鞘套模型,通过数值计算分析了等离子体厚度及等离子体碰撞频率和等离子体电子密度等参数对毫米波大气窗口传输的反射和衰减特性.综合分析表明,可以采用大气窗口35 GHz所在的Ka波段作为临近空间主通信平台,辅以大气窗口0.22 THz所在的太赫兹波段天基中继平台,以期实现飞行器在临近空间飞行时的实时测控.The communication blackout usually happens when the reentering vehicles and hypersonic aerocraft voyage in the near space. According to the data provided by Radio Attenuation Measurement C （RAM C） voyage experiment, a model of plasma sheath will be established to analyze the parameters of plasma including plasma thickness, plasma density and plasma collision frequency to get the reflection and attenuation properties of millimeter wave atmospheric window propagation in plasma sheath, through the method of numerical calculation. 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 0.22 THz in terahertz waveband space-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 大气窗口 

分 类 号：V520[航空宇航科学与技术—人机与环境工程]