Abstract
A 2-D finite element (FE) method based approach is presented for identifying intrinsic, dimension- and frequency-independent electromagnetic material parameters, i.e., DC conductivity, complex permittivity, and complex permeability, of both the grains and grain boundaries for Mn-Zn ferrite cores. The FE model is utilized for solving the full-wave electromagnetic field equation in a cross-section of a ferrite core, accounting for the grain-scale microstructure. Impedance measurements are carried out for three ferrite cores over a frequency range of 10 kHz - 10 MHz. The intrinsic material parameters are identified by fitting the FE model parameters such that the modeled impedances match with the measured ones.
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