Effect of attack angle on the electromag-netic wave transmission characteristics in the hypersonic plasma sheath of a re-entry vehicle

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外文摘要：The attack angle may greatly affect the hypersonic plasma sheaths around the re-entry vehicle,thereby affecting the transmission characteristics of electromagnetic(EM)waves in the sheaths.In this paper,we propose an integrated three-dimensional(3D)model with various attack angles and realistic flying conditions of radio attenuation measurement C-Ⅱ(RAM C-Ⅱ)re-entry tasks for analyzing the effect of the attack angle on the transmission characteristics of EM waves in the sheaths.It is shown that the electron density and collision frequency of the sheath on the windward side can be increased by an order of magnitude with the increase of the attack angle.Meanwhile,the thickness of the sheath on the leeward side is increased where the electron density and collision frequency are reduced.The EM waves are mainly reflected on the windward plasma sheath due to the cutoff effect,and the radio-frequency(RF)blackout is mitigated if the antenna is positioned on the leeward side.Thus,by planning the trajectory properly and installing the antenna accordingly during the re-entry,it is possible to provide an approach for mitigation of the RF blackout problem to an extent.

外文关键词：

attack anglehypersonic plasma sheathre-entry vehicletransmission characteristics

作者：

艾昕、聂秋月、张仲麟、陈培奇、郑树磊、闫昌时、魏国强

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作者单位：

School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,People's Republic of China

Laboratory for Space Environment and Physical Sciences,Harbin Institute of Technology,Harbin 150001,People's Republic of China

School of Physics,Harbin Institute of Technology,Harbin 150001,People's Republic of China

出版年：

2024

DOI：

10.1088/2058-6272/ad7786

等离子体科学和技术(英文版)

中国科学院合肥物质科学研究所中国力学学会

等离子体科学和技术(英文版)

影响因子：0.297

ISSN：1009-0630

年,卷(期)：2024.26(12)