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Progress In Electromagnetics Research
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Home > Vol. 118 > pp. 441-459

ATTENUATION IN EXTENDED STRUCTURES COATED WITH THIN MAGNETO-DIELECTRIC ABSORBER LAYER

By M. Y. Koledintseva, A. G. Razmadze, A. Y. Gafarov, V. V. Khilkevich, J. L. Drewniak, and T. Tsutaoka

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Abstract:
Thin absorbing layers containing magnetic alloy or ferrite inclusions can be effectively used for attenuating common-mode currents on extended structures, such as power cords, cables, or edge-coupled microstrip lines. An analytical model to evaluate attenuation on the coaxial line with the central conductor coated with a magneto-dielectric layer is proposed and validated by the experiments and numerical modeling. The analytical model is validated using available magneto-dielectric samples of different thicknesses. This model can serve for comparing and predicting the absorptive properties of different samples of magneto-dielectric materials, whose compositions may be unknown, but dielectric and magnetic properties can be determined by independent measurements over the specified frequency ranges. From modeling the absorption in a coaxial line with a wrapped central conductor, it could be concluded whether it is reasonable to use this particular material in such applications as a shield on an Ethernet or other cable, for reducing potential common-mode currents and unwanted radiation in the frequency range of interest.

Citation:
M. Y. Koledintseva, A. G. Razmadze, A. Y. Gafarov, V. V. Khilkevich, J. L. Drewniak, and T. Tsutaoka, "Attenuation in Extended Structures Coated with Thin Magneto-Dielectric Absorber Layer," Progress In Electromagnetics Research, Vol. 118, 441-459, 2011.
doi:10.2528/PIER11053012
http://www.jpier.org/PIER/pier.php?paper=11053012

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