磁化等离子鞘套中毫米波大气窗口的衰减  

Research on Attenuation of Millimeter Wave Atmospheric Window in Magnetized Plasma Sheath

作　　者：凌云飞[1] 陈长兴[1] 蒋金[1] 

机构地区：[1]空军工程大学理学院,西安710051

出　　处：《空军工程大学学报（自然科学版）》2016年第2期10-14,共5页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：陕西省自然科学基础研究计划(2014JM8344)

摘　　要：为了更好地利用目前紧张的频谱资源,解决临近空间通信"黑障"问题,选取高斯分布模型建立非均匀等离子鞘套,并结合4个在大气中具有高透过性的毫米波大气窗口,研究等离子鞘套外加不同强度磁场与无外加磁场情况下,毫米波大气窗口在其中传输的衰减情况受攻角和等离子鞘套碰撞频率改变的影响。仿真结果显示:外加不同强度磁场时会改变毫米波大气窗口的衰减值,但不会改变毫米波大气窗口在等离子鞘套中的传输规律。外加磁场是否改善毫米波大气窗口的传输性能需要综合考虑等离子鞘套与毫米波大气窗口的谐振频率。In order to make full use of the scarce spectrum resources, and solve the ＂black out＂ problem of near space communication, a non--uniform plasma sheath is built by selecting a Gauss distribution model combined with the millimeter wave atmospheric window with high transmittance in the atmosphere to study the influence on attenuation of millimeter wave atmosphere window in the process of transmittance in the atmosphere on account of frequency changes subjected to the collision between attack angles and plasma sheath on condition that there are additional different intensity magnetic fields and on no condition. The simulation results show that the magnetic field with different intensities added on the plasma sheath can change the attenuation value of the millimeter wave atmospheric window, but can not change the transmission law of the millimeter wave atmospheric window. The external magnetic field does not neces- sarily improve the transmission performance of the millimeter wave atmospheric window, but also needs to consider the resonance frequency of the plasma sheath and the millimeter wave window. The results pro- vide effective theoretical data support for the establishment of near space communication platform.

关 键 词：通信黑障 等离子鞘套 高斯分布 毫米波大气窗口 衰减 

分 类 号：V443[航空宇航科学与技术—飞行器设计] TN011[电子电信—物理电子学]