摘要
为了建立电磁波在亚波长等离子体薄层中传播的物理数学模型,并针对通信频段的电磁波,研究电磁波在再入航天器表面等离子体薄层中的透射问题,相关研究成果可为再入航天器通信"黑障"现象研究提供理论基础。模型从麦克斯韦方程组出发,采用微分薄层法进行数值求解,获得了不同等离子体密度条件下亚波长等离子体中目标电磁波的透射特性及传播规律,揭示了截止反射效应和碰撞吸收效应在其中发挥的作用。本研究对于深入了解亚波长碰撞等离子体薄层中电磁波的传播过程具有意义。
A physical model for the propagation characteristics of electromagnetic waves in the sub-wavelength plasma was established.The transmission of electromagnetic waves in the thin-layer surface of the reentry spacecraft was studied for the electromagnetic wave in thecommunication frequency band.The proposed model was based on the Maxwell′s equations,and a differential thin layer method was used to solve the problem.The transmission characteristics and propagation laws of the electromagnetic wave in sub-wavelength plasma were obtained under different plasma densities.The effects of the cutoff reflection and the collisional absorption were revealed.This study is of great significance for understanding the propagation characteristics of electromagnetic waves in sub-wavelength collisional plasmas.
出处
《中国空间科学技术》
EI
CSCD
北大核心
2017年第1期111-116,共6页
Chinese Space Science and Technology
基金
国家自然科学基金(51577043
11405038)
中国航天科技集团公司CAST基金(JZ20140005)
关键词
等离子体
亚波长
微波
强碰撞
再入航天器
plasma
sub-wavelength
microwave
strong collision
reentry spacecraft
