不均匀非磁化等离子体覆盖三维目标的FDTD分析  

FDTD Analysis of Three-dimensional Target Covered with Inhomogeneous Unmagnetized Plasma

作　　者：韩正利[1] 丁君[1] 郭陈江[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072

出　　处：《现代电子技术》2011年第16期85-88,共4页Modern Electronics Technique

基　　金：西北工业大学研究生创新种子基金支持项目(Z2010037)

摘　　要：针对典型的目标模型,采用RC-FDTD算法计算不均匀非磁化等离子体覆盖三维导体球的双站和单站雷达散射截面(RCS)。分析了等离子体电子密度分布和等离子体碰撞频率对目标RCS缩减的影响。数值结果表明,等离子体隐身技术显著;双站结果显示,不均匀非磁化等离子体能在较大双站角范围内减小目标的RCS;单站结果说明,等离子体包层能在较大的频率范围内对目标RCS的缩减起作用。选择合适的等离子体参数可以加强隐身效果。A normalized RC-FDTD algorithm is adopted to calculate both the bistatic and monostatic radar cross section（RCS） of 3D conducting sphere perfectly covered with inhomogeneous unmagnetized plasma.The effects of plasma electron density distribution and collision frequency on RCS are discussed respectively.The simulation results indicate that plasma cladding can be successfully used to reduce RCS of the conducting sphere at almost all scattering angles,though RCS may increase at some other angles.And the back scattering results indicate that plasma cladding can reduce RCS of the conducting sphere in a very wide frequency range.Reasonable selection of the plasma parameters can enhance the stealth effect of plasma.

关 键 词：FDTD 等离子体隐身 电子密度分布 雷达散射截面 

分 类 号：TN95-34[电子电信—信号与信息处理]