高超声速目标的超视距探测特性分析  

Analysis of Over-the-horizon Detection Characteristics of Hypersonic Targets

作　　者：华彩成[1] 杨龙泉[1] 郭晓彤[1] 李春晓 陈馨 王严 HUA Cai-cheng;YANG Long-quan;GUO Xiao-tong;LI Chun-xiao;CHEN Xin;WANG Yan(China Research Institute of Radiowave Propagation,Qindao 266107,China)

机构地区：[1]中国电波传播研究所青岛分所,山东青岛266071

出　　处：《中国电子科学研究院学报》2022年第10期966-971,共6页Journal of China Academy of Electronics and Information Technology

基　　金：中国电波传播研究所稳定支持科研经费资助项目(A132004W21)。

摘　　要：高频超视距探测主要以电离层为媒介,其可以克服地球曲率,实现地面距离数千公里的监测。高超声速飞行目标在大气层中飞行时会与空气产生摩擦,生成大量的等离子体包覆的存在,研究结果表明,高超目标产生的等离子体中电子浓度数值远高于常规状态下电离层中的含量,可以对短波频率起到散射作用。由于等离子体流场的存在,同时改变了目标本体周围的电磁环境,使得目标和等离子体流场的雷达散射截面积(Radar Cross Section, RCS)值远大于目标本体的RCS值。文中对典型的钝锥体目标进行了等离子体流场以及目标联合体的RCS计算分析,结果表明联合体的RCS值大于目标本体的RCS值。The HF over-the-horizon detection is based on the ionosphere, which can overcome the earth curvature and realize the monitoring of thousands of kilometers of ground distance. Hypersonic flying Target will produce friction with air and generate a large number of plasma coating. The research results show that the electron concentration in the plasma generated by the hypersonic target is much higher than that in the ionosphere under the conventional state, which can play a scattering role on the short-wave frequency. Due to the existence of plasma flow field, the electromagnetic environment around the target body is changed, so that the RCS values of the target and plasma flow field are much larger than those of the target body. In this paper, the plasma flow field and RCS of typical blunt cone targets are calculated and analyzed, The results show that the RCS value of the plasma flow field is greater than that of the target body.

关 键 词：高超声速 电离层 超视距 探测 RCS 

分 类 号：TN011[电子电信—物理电子学]