过密等离子体包覆目标的散射特性分析  

Analysis of scattering characteristic for target coated with over dense plasmas

作　　者：王帅雷[1] 方宁[1] 渠慎丰[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《电子测量技术》2010年第12期12-15,共4页Electronic Measurement Technology

摘　　要：从波动方程出发,结合等离子体特性,分析了过密等离子体中电磁波的传播特性。在此基础上,运用阻抗边界条件给出了含过密等离子体层的Fresnel反射系数的计算公式,并与物理光学(PO)理论相结合,利用OPENGL机制,实现了过密等离子体包覆目标时雷达散射截面的可视化计算方法。该方法充分利用光照模型和z-buffer消隐技术,从而使计算过程可视、快速。最后,以导体平板和导体球为例计算了过密等离子体包覆目标的RCS,结果表明过密等离子体包覆下的目标仍具有RCS缩减。In this paper,combined with the characteristics of plasmas,the propagating characteristic of electromagnetic wave in over dense plasmas is discussed.On the basis of that,the formula for computing the Fresnel reflection coefficient on the surface of multilayer plasmas including over dense plasma is supplied by applying impendence boundary conditions（IBC）.Then combing physical optical（PO）and impendence boundary conditions,the visual method for computing radar cross section of targets coated with over dense plasmas is given by the advances of OPENGL mechanism,which depends on the illumination model and the z-buffer blanking technology,so the process of computing is visual and fast.At last,the RCS of panel and sphere coated with over dense plasmas is computed,and the conclusion is arrived that RCS of target coated with over dense plasmas still become less.

关 键 词：图形电磁计算 等离子体 阻抗边界条件 

分 类 号：TM15[电气工程—电工理论与新技术]