电波科学学报2017，Vol.32Issue(2)：184-191,8.DOI:10.13443/j.cjors.2017032001
截断各向异性介质的修正NPML吸收边界条件
An NPML absorbing boundary condition for truncating anisotropic medium
摘要
Abstract
Based on the finite-difference time-domain(FDTD) method in anisotropic medium and nearly perfect matched layer(NPML) theory, the implementation of the modified NPML absorbing boundary condition(ABC) for truncating anisotropic medium is presented.By inserting the stretching factor within the space partial derivatives of Maxwell''s curl equations and combining the spatial interpolation method, the ABC formulations method is derived.The associated expressions are easy to realize in the FDTD method.The reflection errors of the radiation fields of an electric dipole are calculated and thus the validity of the proposed ABC for truncating 2-D anisotropic medium is verified.In 3-D examples, the radiation phase distribution of the time-domain field as well as the time-dependent relative error for different layers NPML absorbing boundary are simulated with the algorithm.Numerical results demonstrate that the NPML ABC has good absorbing performance for electromagnetic wave in anisotropic mediums.关键词
各向异性介质/时域有限差分方法/近似完全匹配层/吸收边界条件Key words
anisotropic medium/finite-difference time-domain/nearly perfect match layer/absorbing boundary condition分类
信息技术与安全科学引用本文复制引用
施丽娟,杨利霞,夏景..截断各向异性介质的修正NPML吸收边界条件[J].电波科学学报,2017,32(2):184-191,8.基金项目
国家自然科学基金(No.61601205) （No.61601205）
江苏省自然科学基金(BK20160541,BK20150528) （BK20160541,BK20150528）
江苏省高校自然科学研究面上项目(16KJB140003) （16KJB140003）
