Abstract
Abstract In order to solve the practical engineering problem in calculating the effective permittivity and permeability of composites, this paper introduced the dilution process model (DPM) which sets the composite with the highest particle volume concentration as new matrix medium. With DPM, complex permittivity and permeability of composites could be calculated by using the Maxwell Garnett (MG) formula, the Bruggeman (BG) formula and the generalized effective medium theory (GEMT) with a fitting parameter of V which is a second-degree polynomial of new particle volume fraction. With the proposed method, the effective complex permittivity and permeability of composites consisting of isotropic spherical carbonyl iron particles or the anisotropic carbonyl iron particles embedded in the paraffin are calculated and comparisons between calculated results and experimental results are made. The results indicate that the calculated results using the GEMT formula with DPM are in better agreement with the measured results than that using the MG formula and BG formula. The achievement of this paper has important theoretical significance and engineering application value.
Published Version
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