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Electromagnetic Wave Absorption Characteristics Adjustment Method of Recycled Powder-Type Magnetic Wood for Use as a Building Material

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7 Author(s)
Hideo Oka $^{1}$Department of Electric and Electronic Engineering,, Iwate University,, Morioka,, Japan ; Minekazu Terui ; Hiroshi Osada ; Noboru Sekino
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The purpose of this paper is to demonstrate the electromagnetic wave absorption characteristics of powder-type magnetic wood by changing the mixing ratios for the Mn-Zn ferrite and Ni-Zn ferrite powder. The results show that the matching frequency of the electromagnetic wave absorption characteristics can be controlled by changing the mixing ratios of the magnetic materials and the thickness of the board. We obtained electromagnetic wave absorption of close to 20 dB over the 2.5 GHz-6.2 GHz frequency range. The powder-type magnetic wood boards used in these experiments satisfy JIS standards for wood surface materials in terms of bending strength and deflection. The results from our studies can be used to design indoor powder-type magnetic wood wave absorbers for a specified absorption frequency.

Published in:

IEEE Transactions on Magnetics  (Volume:48 ,  Issue: 11 )