A New Subgridding Technology Based on FDTD Algorithm

REN Hao; WANG Sheng; XIE Guo-dang; WANG Li-hua; WU Xian-liang; HUANG Zhi-xiang

doi:10.3969/j.issn.0372-2112.2017.12.016

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A New Subgridding Technology Based on FDTD Algorithm

更新时间：2025-07-16

- A New Subgridding Technology Based on FDTD Algorithm
- Acta Electronica Sinica Vol. 45, Issue 12, Pages: 2944-2948(2017)
- 作者机构：
  
  安徽大学计算智能与信号处理教育部重点实验室,安徽,合肥,230039
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61471001, No.51277001, No.61601166, No.61701001, No.61701003);Natural Science Foundation of Anhui Province (No.KJ2015A202);Key Program of Natural Science Research Program of Colleges and Universities in Anhui Province (No.KJ2017ZD51, No.KJ2017ZD02);National Natural Science Foundation of China for Excellent Youth Schoolars (No.61722101)
- DOI：10.3969/j.issn.0372-2112.2017.12.016
  CLC： TN801
- Published Online：25 December 2017，
  
  Published：2017
- 稿件说明：
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REN Hao, WANG Sheng, XIE Guo-dang, et al. A New Subgridding Technology Based on FDTD Algorithm[J]. Acta Electronica Sinica, 2017, 45(12): 2944-2948.
DOI：

REN Hao, WANG Sheng, XIE Guo-dang, et al. A New Subgridding Technology Based on FDTD Algorithm[J]. Acta Electronica Sinica, 2017, 45(12): 2944-2948. DOI： 10.3969/j.issn.0372-2112.2017.12.016.

摘要

提出了一种基于空间滤波（Spatial Filtering-Finite-Difference Time-Domain，SF-FDTD）算法的亚网格技术，使得FDTD算法的Courant-Friedrich-Levy（CFL）稳定性条件可通过空间频域滤波操作得以提高，从而获得高稳定度FDTD算法.进一步将SF-FDTD算法应用到亚网格技术中，可使亚网格区域时间步长的选取取与粗网格一致，从而极大地提高了计算效率.数值计算结果表明，在求解带有精细结构的电磁问题上，所提算法具有较高的准确性和有效性.

Abstract

A subgridding technique based on spatial filtering-Finite Difference Time Domain (SF-FDTD) method is proposed in this paper

the Courant-Friedrich-Levy (CFL) stability condition of the conventional FDTD algorithm can be improved by filtering operation in spatial frequency domain

thus obtaining a high stability FDTD method.The SF-FDTD algorithm is further applied to the subgridding technique

so that the time step of the subgridding region is the same as that of the coarse grid which greatly improved the computational efficiency.The numerical results show that the algorithm has high accuracy and validity in solving the electromagnetic problem with fine structure.

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