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亚网格技术在二维Laguerre-FDTD方法中的应用
引用本文:刘莹莹,聂守平,刘 升,庄 伟,,唐万春.亚网格技术在二维Laguerre-FDTD方法中的应用[J].南京师范大学学报,2016,0(2).
作者姓名:刘莹莹  聂守平  刘 升  庄 伟    唐万春
作者单位:(1.南京师范大学物理科学与技术学院,江苏 南京 210023)(2.南京理工大学电子工程与光电技术学院,江苏 南京 210094)(3.江苏省地理信息资源开发与利用协同创新中心,江苏 南京 210023)
摘    要:提出了一种基于二维Laguerre-FDTD方法的亚网格技术,该技术是用波动方程法来处理粗细网格边界. 运用加权的Laguerre多项式作为时域基函数对波动方程中电磁场分量作基函数展开,使用伽辽金方法处理,消除方程中的时间项,经有限差分后得到无条件稳定的亚网格处理方法. 数值计算结果证明,在求解含有精细结构的电磁计算问题上,该算法具有准确性和有效性.

关 键 词:Laguerre-FDTD  亚网格技术  电磁计算

Application of Subgridding Algorithm to Two-DimensionalLaguerre-FDTD Method
Liu Yingying,Nie Shouping,Liu Sheng,Zhuang Wei,,Tang Wanchun.Application of Subgridding Algorithm to Two-DimensionalLaguerre-FDTD Method[J].Journal of Nanjing Nor Univ: Eng and Technol,2016,0(2).
Authors:Liu Yingying  Nie Shouping  Liu Sheng  Zhuang Wei    Tang Wanchun
Affiliation:(1.School of Physical and Technology,Nanjing Normal University,Nanjing 210023,China)(2.School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)(3.Jiangsu Center for Collaborative Innovation in Geogr
Abstract:A subgridding algorithm in the two-dimensional Laguerre finite-difference time-domain(2-D Laguerre-FDTD)technique is presented in this paper. The homogeneous travelling wave equation is applied to calculate the tangential electric fields at the interface. The subgridding technique for Laguerre-FDTD method is used to deal with temporal variables analytically by choosing weighted Laguerre polynomials as basis functions and Galerkin’s method,which is an unconditional stable method. Numerical results for fine structures are presented to demonstrate the accuracy and efficiency of the proposed method.
Keywords:Laguerre-FDTD  subgridding technique  electromagnetic calculation
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