Modeling of Ferrite-based Materials for Shielding Enclosures
An analytical model for a magneto-dielectric composite material is presented based on the Maxwell Garnett rule for a dielectric mixture, and on Bruggeman's effective medium theory for permeability of a ferrite powder embedded in a dielectric. In order to simultaneously treat frequency-dispersive permittivity and permeability of a composite in a full-wave FDTD code, a new algorithm based on discretized auxiliary differential equations has been implemented. In this paper, numerical examples of modeling structures containing different magneto-dielectric mixtures are presented.
M. Koledintseva et al., "Modeling of Ferrite-based Materials for Shielding Enclosures," Journal of Magnetism and Magnetic Materials, vol. 321, no. 7, pp. 730-733, Elsevier, Apr 2009.
The definitive version is available at https://doi.org/10.1016/j.jmmm.2008.11.037
Electrical and Computer Engineering
Keywords and Phrases
Bruggeman Formulation; FDTD Technique; Maxwell Garnett Formulation; Magneto-Dielectric Composites; Microwave Permeability; Microwave Permittivity; Shielding Effectiveness (S.E.); Maxwell Garnett And Bruggeman Formulations; Microwave Permittivity And Permeability; Capillarity; Composite Micromechanics; Ferrite; Garnets; Magnetic Shielding; Magnetos; Maxwell Equations; Microwaves; Permittivity; Wave Equations; Analytical Models; Auxiliary Differential Equations; Dielectric Mixtures; Effective Medium Theories; FDTD Codes; FDTD Technique; Ferrite Powders; Modeling Structures; Numerical Examples; Shielding Enclosures; Finite Difference Time Domain Method
International Standard Serial Number (ISSN)
Article - Journal
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