相对运动等离子体平板与电磁波相互作用研究  

Interaction between relative moving plasma plate and electromagnetic wave

作　　者：满良 邓浩川 薄勇 肖志河[1,2] 杨利霞 MAN Liang;DENG Haochuan;BO Yong;XIAO Zhihe;YANG Lixia(The Second Academy of China Aerospace Science and Industry Corporation,Beijing 100854,China;Science and Technology on Electromagnetic Scattering Laboratory,Beijing 100854,China;Information Materials and Intelligent Sensing Laboratory of Anhui Province,Anhui University,Hefei 230601,China)

机构地区：[1]中国航天科工集团有限公司第二研究院,北京100854 [2]电磁散射重点实验室,北京100854 [3]安徽大学信息材料与智能感知安徽省实验室,合肥230601

出　　处：《电波科学学报》2023年第1期164-172,共9页Chinese Journal of Radio Science

基　　金：国家自然科学基金(62071003,41874174,61901004);国家国防科工局基础研究重点项目(稳定支持项目);安徽高校自然科学研究项目(KJ2020A0024);安徽省重点科研平台协同创新项目(GXXT-2020-050);安徽省高校协同创新计划项目(GXXT-2021-028);脉冲功率激光技术国家重点实验室开放研究基金(AHL 2020 KF04);计算智能与信号处理教育部重点实验室开放课题(2020A008)。

摘　　要：高超声速飞行器在飞行过程中,由于高温高压的作用,会在飞行器表面形成一层等离子体鞘层,飞行器及其等离子体鞘层相对于地面测控中心做高速相对运动,对目标物电磁回波会带来严重影响.此外,等离子体鞘层的时变特性,也会对目标物雷达回波进行调制,使测控中心难以识别、跟踪目标.本文利用Lorentz-FDTD方法研究了相对运动等离子体鞘层与电磁波之间的相互作用,并分析了等离子体鞘层的相对运动特性和时变特性对电磁波造成的影响,发现运动的时变等离子体除了对电磁波造成多普勒频移外,还会对入射波频谱进行调制.During the flight of hypersonic aircraft, due to the impact of high temperature and high pressure, a layer of plasma sheath is formed on the surface of the aircraft. With the aircraft and its plasma sheath motion at high speed relative to the ground measurement and control center, a serious impact on the electromagnetic echo of the target will be caused. In addition, the time-varying characteristics of plasma sheath also modulate the radar echo of the target,making it difficult for the center to identify and track the target. In this paper, Lorentz-FDTD method is used to study the interaction between the relatively moving plasma sheath and the electromagnetic wave, and the influence of the relative motion and time-varying characteristics of the plasma sheath on the electromagnetic wave is analyzed. It is found that the moving time-varying plasma not only causes Doppler shift to the electromagnetic wave but also modulates the spectrum of incident wave.

关 键 词：时域有限差分 LORENTZ变换 相对运动 时变等离子体 

分 类 号：O441[理学—电磁学] V11[理学—物理]