等离子体涡电磁散射特性及隐身性能  

Scattering and Stealth of Plasma Vortex

作　　者：常雨[1] 陈伟芳[1] 孙明波[1] 吴其芬[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,湖南长沙410073

出　　处：《航空学报》2008年第2期304-308,共5页Acta Aeronautica et Astronautica Sinica

摘　　要：针对非均匀等离子体在飞行器隐身中的应用,采用分段线性电流密度递归卷积时域有限差分(PLJERC-FDTD)方法计算等离子体涡及涡串电磁散射特性,分析等离子体涡对飞行器隐身性能影响。计算表明,等离子体涡在很大频率区间对电磁波吸收效果显著,RCS降低很大,具有明显的隐身效果。等离子体涡表现出一定规律性的极化特性,对L,S和C波段电磁波具有不同的吸收、反射特性。Aiming at the non-uniform plasma application in aircraft stealth, a piecewise linear current density recursive convolution finite-different time-domain （PLJERC-FDTD） algorithm is applied to the study on the scattering for the plasma vortex and plasma vortex cluster. The effects of plasma vortex on the aircraft stealth are analyzed. The results illustrate that the plasma vortex can absorb electromagnetic waves obviously, and the smaller radar cross section （RCS） is obtained comparing with RCS without plasma vortex. The stealth performance of vortex is remarkable. The RCS vs. polarization angle and the characteristics which electromagnetic waves are absorbed and reflected for L, S and C band follow some laws.

关 键 词：时域有限差分 电磁波 等离子体 涡 雷达散射截面 隐身 

分 类 号：TJ765.5[兵器科学与技术—武器系统与运用工程]