用于周期结构分析的DGTD时间步长界估计方法

IF 3.7 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-17 DOI:10.1109/LAWP.2025.3530873

Ming Yu Xi;Yan Shi;Shi Chen Zhu;Jia Hao Zhang;Zhe Xin Luo

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引用次数: 0

摘要

在求解周期电磁结构的时域有限差分法（FDTD）中，劈裂场格式得到了广泛的应用。本文首次将分场策略推广到不连续伽辽金时域（DGTD）方法中，并解析导出了该方法的稳定性条件。为了提高正常和斜入射周期边界条件下时间阶跃估计的计算效率，进一步提出了一种基于矩阵分解技术的元素求解方法。数值算例表明，该方法精度高，效率高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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An Estimation Method of Time Step Bound in DGTD for Periodic Structure Analysis

The split-field scheme has been widely used in the finite-difference time domain (FDTD) method for the solution of periodic electromagnetic structures. In this letter, the split-field strategy has been extended to discontinuous Galerkin time-domain (DGTD) method for the first time, and the stability condition of the resulting method is analytically derived. An elementwise solution approach based on the matrix decomposition technique is further developed to improve the computational efficiency of time step-bound estimation for both the normally and obliquely incident periodic boundary conditions. Several numerical examples are given to demonstrate the good accuracy and the high efficiency of the proposed split-field DGTD method.

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.