Characterizing Low-Frequency Scattering by Discontinuous Galerkin Integral Equation Method in the Time Domain

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-06-17 DOI:10.1109/LAWP.2025.3580364

Rongchuan Bai;Ming- Da Zhu;Li Huang;Haoxuan Zhang;Zhe Chen;Xiude Tu;Ruisang Liu;Xiaomeng Ren;Hao Xie;Wen-Yan Yin

引用次数: 0

Abstract

This letter presents a novel method for solving ultra-low frequency electromagnetic scattering using the discontinuous Galerkin electric field integral equation (DGEFIE) in the time domain. The nonconformal nature of DGEFIE makes it challenging to apply methods such as loop-tree, loop-star decomposition to solve low-frequency problems. Therefore, we propose a method for the computation of scattering results of extremely low frequency under nonconformal mesh conditions, covering both near and far electromagnetic fields. Specifically, the proposed method can handle electrical sizes ranging down to 10⁻⁴³λ, overcoming the numerical breakdown issues at low frequencies. Moreover, this method can be easily integrated into existing codes. Several typical examples demonstrate the accuracy and effectiveness of the proposed method.

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时域不连续伽辽金积分方程法表征低频散射

本文提出了一种在时域用不连续伽辽金电场积分方程求解超低频电磁散射的新方法。gefee的非共形特性使得应用环树、环星分解等方法求解低频问题具有挑战性。因此，我们提出了一种计算非保形网格条件下极低频散射结果的方法，涵盖近、远电磁场。具体来说，所提出的方法可以处理低至10−43λ的电尺寸，克服了低频下的数值击穿问题。此外，该方法可以很容易地集成到现有的代码中。若干典型算例验证了该方法的准确性和有效性。

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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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.