Complex Dielectric Constant Computation from Three Dimensional Simulations of Random Media Using The Finite Difference Time Domain Method

摘要

Several mixing models are available in order to determine the effective dielectric constant of materials made up of different constituents. Most of these models have regions of validity that depend on the fractional volume of inclusions and the operating frequency. In this paper we compare results from the Claussius Mossotti mixing law to results obtained from a three dimensional Finite Difference Time Domain model of a random medium such as sea ice. The comparison shows that the FDTD model agrees with the mixing law for low fractional volume (less than 10%) and low frequency less than 5 GHz.