Comparison of Time-Domain Finite-Difference, Finite-Integration, and Integral-Equation Methods for Dipole Radiation in Half-Space Environments

IF 0.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Progress in Electromagnetics Research M Pub Date : 2017-06-18 DOI:10.2528/PIERM17021602

C. Warren, S. Šesnić, A. Ventura, L. Pajewski, D. Poljak, A. Giannopoulos

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引用次数: 10

Abstract

In this paper we compare current implementations of commonly used numerical techniques - the Finite-Difference Time-Domain (FDTD) method, the Finite-Integration Technique (FIT), and Time-Domain Integral Equations (TDIE) - to solve the canonical problem of a horizontal dipole antenna radiating over lossless and lossy half-spaces. These types of environment are important starting points for simulating many Ground Penetrating Radar (GPR applications which operate in the near-field of the antenna, where the interaction among the antenna, the ground, and targets is important. We analysed the simulated current at the centre of the dipole antenna, as well as the electric field at different distances from the centre of the antenna inside the half-space. We observed that the results from the simulations using the FDTD and FIT methods agreed well with each other in all of the environments. Comparisons of the electric field showed that the TDIE technique agreed with the FDTD and FIT methods when observation distances were towards the far-field of the antenna but degraded closer to the antenna. These results provide evidence necessary to develop a hybridisation of current implementations of the FDTD and TDIE methods to capitalise on the strengths of each technique.

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半空间环境中偶极子辐射时域有限差分、有限积分和积分方程方法的比较

在本文中，我们比较了目前常用的数值技术——时域有限差分（FDTD）方法、有限积分技术（FIT）和时域积分方程（TDIE）——的实现，以解决水平偶极天线在无损和有损半空间上辐射的规范问题。这些类型的环境是模拟许多探地雷达的重要起点（在天线近场工作的探地雷达应用，天线、地面和目标之间的相互作用很重要。我们分析了偶极天线中心的模拟电流，以及半空间内距离天线中心不同距离的电场。我们观察到，使用FDTD和FIT的模拟结果符合在所有的环境中，霍德的意见都很一致。电场的比较表明，当观测距离朝向天线的远场，但距离天线较近时，TDIE技术与FDTD和FIT方法一致。这些结果为开发FDTD和TDIE方法的当前实现的混合提供了必要的证据，以利用每种技术的优势。

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

Progress in Electromagnetics Research M Materials Science-Electronic, Optical and Magnetic Materials

CiteScore

2.50

自引率

10.00%

发文量

114

期刊介绍： Progress In Electromagnetics Research (PIER) M publishes peer-reviewed original and comprehensive articles on all aspects of electromagnetic theory and applications. Especially, PIER M publishes papers on method of electromagnetics, and other topics on electromagnetic theory. It is an open access, on-line journal in 2008, and freely accessible to all readers via the Internet. Manuscripts submitted to PIER M must not have been submitted simultaneously to other journals.