Comparison of FDTD Algorithms for Subcellular Modeling of Slots in Shielding Enclosures

Kuang-Ping Ma
Min Li
James L. Drewniak, Missouri University of Science and Technology
Todd H. Hubing, Missouri University of Science and Technology
Thomas Van Doren, Missouri University of Science and Technology

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Subcellular modeling of thin slots in the finite-difference time-domain (FDTD) method is investigated. Two subcellular algorithms for modeling thin slots with the FDTD method are compared for application to shielding enclosures in electromagnetic compatibility (EMC). The stability of the algorithms is investigated, and comparisons between the two methods for slots in planes, and slots in loaded cavities are made. Results for scattering from a finite-length slot in an infinite plane employing one of the algorithms are shown to agree well with published experimental results, and power delivered to an enclosure with a slot agree well with results measured for this study.