Eddy Currents In Heterogeneous Mixtures

Abstract

The interaction of electromagnetic waves with heterogeneous media can be described by mixing theory which is usually restricted to the dielectric permittivity. The particle size must be much smaller than the wavelength to avoid scattering, but otherwise there is no explicit size dependence on the effective permittivity of the mixture. In the present work an effect is considered which can give rise to a size-dependent diamagnetic permeability with sensible losses at microwave frequencies. The effect is based on eddy currents in a conducting component. An estimation of the influence of this effect on dielectric and diamagnetic properties is presented for wet snow.