临近空间激波等离子体包覆目标电磁特性分析

Analysis of Electromagnetic Characteristics of Target Covered by Shockwave Plasma in Near Space

为了有效探测临近空间高超声速飞行器,分析了激波等离子体对电磁波的吸收、反射作用,讨论了激波等离子体单位距离衰减、反射系数和回波总衰减与雷达频率、电子碰撞频率的关系,并对其之间关系以及对不同波段电磁波的影响进行了仿真.仿真结果表明激波等离子体对微波段电磁波衰减较大.最后。

For purpose of detecting the near space hypersonic air vehicle effectively, this paper analyzes the absorption and reflection effects of shockwave plasma on the electromagnetic wave, discusses the relations between the unit distance attenuation, reflection coefficient and echo＇s overall attenuation of shockwave plasma and the frequencies of radar and electron collision, and simulates their impacts on the various electromagnetic waveband in terms of the relations. The simulation results indicate that the shockwave plasma exerts the greater attenuation on the electromagnetic wave in microwave band. Finally, some advices are put forward for radar＇s detecting such type of targets in this paper.