不均匀等离子体球的电磁波轨迹及其应用  

The electromagnetic wave paths and applications of inhomogeneous plasma spheres

作　　者：刘少斌[1] 莫锦军[1] 袁乃昌[1] 

机构地区：[1]国防科技大学电子科学与工程学院

出　　处：《电波科学学报》2002年第2期134-137,172,共5页Chinese Journal of Radio Science

基　　金：国防科技重点实验室基金资助 (98JS93.2 .1KG0 10 8)

摘　　要：分析了非均匀等离子体球对电磁波的折射隐身。用变分法给出了电磁波在等离子体球中的轨迹 ,讨论了等离子体自由电子密度分布与电磁波的返转点、目标的 RCS缩减的关系。分析发现 ,等离子体的电子密度变化对目标隐身效果影响很大 。This paper presents the refraction of electromagnetic wave in inhomogeneous plasma spheres. The electromagnetic wave paths in plasma spheres are given by calculus of variations. The relationship between the electron density in plasma spheres and the reversal of electromagnetic wave and the reduction of RCS of a target is discussed. The results illustrate that the change of electron density in plasma may have considerable influence on the reduction of the RCS. The faster the electron density in plasma changes along the radius of plasma sphere, the better stealth effect takes.

关 键 词：不均匀等离子体球 电磁波轨迹 等离子体隐身 雷达散射截面 

分 类 号：V218[航空宇航科学与技术—航空宇航推进理论与工程]