Finite Element Calculation of Microwave Absorption by the Cranial Structure

Using an axisymmetric inhomogeneous lossy dielectric model of the human cranial structure, calculations yielding interiorabsorbed power density spatial distributions and whole-body cross sections are presented. These computations are preformed by way of a finite element implementation of the coupled azimuthal potential formulation. Results are considered for two angles of plane wave incidence, with two orthogonal polarizations, at the frequencies of 1 and 3 GHz. Comparisons are made with a simpler multilayered spherical model. Attention is given to the sensitivity of "hot spot" intensities to incident field orientations and model parameter uncertainties.