A Subgridding Scheme with the Unconditionally Stable Explicit FDTD Method

被引：0

作者：

Zhou, Mengqiao ^{[1
]}

Chen, Zhizhang ^{[1
,2
]}

Fan, Wei ^{[2
]}

Bo, Xu ^{[1
]}

Wei, Wang ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Elect Engn, Chengdu, Peoples R China

[2] Dalhousie Univ, Dept Elect & Comp Engn, Halifax, NS, Canada

来源：

2016 IEEE MTT-S INTERNATIONAL CONFERENCE ON NUMERICAL ELECTROMAGNETIC AND MULTIPHYSICS MODELING AND OPTIMIZATION (NEMO) | 2016年

关键词：

Explicit finite-difference time-domain method; unconditionally stable; subgridding; coarse mesh; fine mesh; interpolation;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Subgriding is much desirable for FDTD modeling of small structures in large structures. However, it has remained to be very challenging for its instability. In this paper, we propose a simple subgridding scheme that takes advantage of the explicit unconditionally stable finite-difference time-domain (FDTD) method free of unstable modes: it is applied to the coarse mesh regions with larger space steps and to the fine mesh regions with small space steps. As a result, a single relatively large FDTD time step can be used in both regions and only spatial interpolation of fields at the interface between coarse mesh and subgridded fine mesh regions are needed. Numerical examples are presented to verify the effectiveness and efficiency of the proposed scheme.

引用

页数：3

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