地下二维各向异性圆柱目标近场计算的FDTD方法  

FDTD Method to Near Field Calculation of Buried Two-Dimensional Anisotropic Object

作　　者：姜晓艳 耿友林[1] JIANG Xiaoyan;GENG Youlin(School of Electronic Information,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学电子信息学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2023年第6期52-58,共7页Journal of Hangzhou Dianzi University：Natural Sciences

摘　　要：利用时域有限差分法(Finite Difference Time Domain,FDTD)研究了地下二维各向异性介质目标的散射特性。首先,总体模型采用经典的半空间总场/散射场模型,吸收边界采用各向异性完全匹配层(Uniaxial Perfectly Matched Layer,UPML);其次,入射源使用高斯脉冲,并通过一维FDTD法添加到时域迭代方程中;最后分别计算了地下二维电各向异性介质和地下二维磁各向异性介质的散射,给出了目标尺寸,土壤电参数对目标散射场的影响。通过与仿真软件FEKO的对比和模型误差分析,验证了算法和程序的可靠性。The scattering characteristics of a buried two-dimensional(2D)anisotropic object are investigated by using the Finite Difference Time Domain(FDTD)method.Firstly,the classical half-space total field/scattering field model is used for the overall model,and uniaxial perfectly matched layer(UPML)is used for the absorption boundary.Secondly,Gaussian pulse is used for the incident source and added to the time domain iterative equations by the one-dimensional FDTD method.Finally,the scattering properties of the buried two-dimensional electrically anisotropic medium and the buried two-dimensional magnetically anisotropic medium are calculated separately.The scattering from the buried 2D electrically anisotropic medium and 2D magnetically anisotropic medium is calculated separately,giving the effect of object size,soil electrical parameters on the object scattering field.The reliability of the algorithms and procedures is verified by comparing with the simulation software FEKO and model error analysis.

关 键 词：各向异性 近场散射 时域有限差分法 

分 类 号：TN011[电子电信—物理电子学]