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RF Power Absorption Enhancement of Magnetic Composites with Conductive Grid

Journal of Magnetics, Volume 17, Number 2, 30 Jun 2012, Pages 129-132

Baekil Nam (Faculty of General Education, Kyungnam University), Jinu Kim (Department of Physics, Yeungnam University), Ki Hyeon Kim *

(Department of Physics, Yeungnam University)

Abstract

To evaluate the electromagnetic power absorption in near field, the magnetic composites with the conductive grids were simulated using the typical permeability frequency profiles. The transmission power absorptions of the magnetic composites on microstrip line were extracted by the 3D FEM simulation program of HFSS. The magnitudes of power absorptions were greatly enhanced up to 98% and broadened the absorbing frequency band over 5 GHz by the insertion of a conductive grid in magnetic composite. The initial frequency of the power absorption can controlled by the change of the ferromagnetic resonance frequencies of the magnetic composite.

Keywords: permeability; magnetic composite; power absorption; conductive grid

DOI: http://dx.doi.org/10.4283/JMAG.2012.17.2.129

Full Text: PDF

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