A comparison of FDTD algorithms for subcellular modeling of slots in shielding enclosures

Ma, Kuang-Ping; Drewniak, James L.

doi:10.1109/isemc.1995.523538

Cited by 1 publication

(1 citation statement)

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“…Enclosures made of metal alloys-and particularly aluminum alloys-have often been used for that purpose and many numerical methods have been used to model the coupling between an electromagnetic (EM) wave and a 3-D enclosure with apertures. Examples of numerical methods are the finite-element method (FEM) [1], [2], the transmission-line modeling method [3], [4], the finite difference time domain (FDTD) method [5], [6], or the moment technique [7], [8]. The presence of metal is easily taken into account in these numerical methods by considering the material as a perfect electric conductor.…”

Section: Introductionmentioning

confidence: 99%

Effective Permittivity of Shielding Composite Materials for Microwave Frequencies

Préault

Corcolle

Daniel

et al. 2013

IEEE Trans. Electromagn. Compat.

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Due to mass constraints, composite materials are possible candidates to replace metal alloys for electromagnetic shielding applications. The design of standard metallic shielding enclosures often relies on finite-element calculations. But in the case of composite materials, the strong dependence on the shielding properties to the microstructure makes the finite-element approach almost impossible. Indeed meshing the microstructure would imply a huge number of elements, incompatible with usual computational resources. We propose in this paper to develop homogenization tools to define the effective electromagnetic properties of composite materials at microwave frequencies. The ratio between the characteristic size of the microstructure and the wavelength is shown to be a key parameter in the homogenization process. The effective properties can then be used as an input for electromagnetic compatibility standard tools, designed for homogeneous media.Index Terms-Effective medium, heterogeneous materials, homogenization, inclusion problem, Maxwell-Garnett model, shielding effectiveness.

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