负折射率媒质覆盖导体柱散射特性的FDTD分析  

Analysis of Scattering of Perfectly Conducting Cylinder Coated with Negative Index of Refraction Materials Using the FDTD Method

作　　者：段梦蛟[1] 文光俊[1] 邵振海[1] 谢康[1] 

机构地区：[1]成都电子科技大学通信与信息工程学院,成都610054

出　　处：《微波学报》2008年第S1期44-48,共5页Journal of Microwaves

基　　金：国家自然科学基金(项目批准号:60571024;60771046和60588502)

摘　　要：利用时域有限差分(FDTD)方法研究了负折射率媒质覆盖二维导体目标的散射特性。从负折射率媒质的本构关系出发,给出了描述负折射率媒质场与流的微分方程组,将其离散得到用于FDTD计算的递推表达式。对TM波垂直入射时的仿真结果的分析表明,适当选取媒质参数,负折射率媒质覆盖层可以显著减少雷达目标的电磁回波能量。由于模拟的负折射率媒质是匹配介质,其吸波性能要明显优于等离子体。The scattering property of 2-dimensional conducting objects coated with negative index of refraction materials (NIRM) is studied in this paper, using the finite-difference time-domain (FDTD) method. From negative index of refraction materials’ (NIRM) constitutive relation, the differential equations that describe the character of electromagnetic (EM) wave in NIRM are obtained. NIRM’s Finite-Difference Time-Domain (FDTD) formulations are obtained by dispersing those differential equations. By simulating the ...

关 键 词：时域有限差分法 负折射率媒质 电磁散射 等离子体 

分 类 号：TN01[电子电信—物理电子学]