Huygens subgridding for 3-D frequency-dependent finite-difference time-domain method

Maksims Abalenkovs, Fumie Costen, Jean Pierre Bérenger, Ryutaro Himeno, Hideo Yokota, Masafumi Fujii

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    Abstract

    Subgridding methods are often used to increase the efficiency of the wave propagation simulation with the Finite-Difference Time-Domain method. However, the majority of contemporary subgridding techniques have two important drawbacks: the difficulty in accommodating dispersive media and the inability for physical interfaces to cross the subgridding interface. This paper presents an extension of the frequency-dependent Huygens subgridding method from one dimension to three dimensions. Frequency dependency is implemented via the Auxiliary Differential Equation approach using the one-pole Debye relaxation model. Numerical experiments indicate that subgridding interfaces can be placed in various Debye media as well as across the physical interface. © 2012 IEEE.
    Original languageEnglish
    Article number6230631
    Pages (from-to)4336-4344
    Number of pages8
    JournalIEEE Transactions on Antennas and Propagation
    Volume60
    Issue number9
    DOIs
    Publication statusPublished - 2012

    Keywords

    • Computational electromagnetics
    • electromagnetic fields
    • electromagnetic modeling
    • finite difference methods
    • multigrid methods
    • numerical simulation

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