Planar Multilayer Model of Human Tissue Exposed to a Plane Electromagnetic Wave
Johannes Grund, Kai-Uwe Rathjen, Carl Friedrich Rädel, Marcus Stiemer, Stefan Dickmann
Abstract
A simple, analytical method is proposed to determine the electromagnetic absorption and the temperature increase in human tissue based on the wave matrix method. The method is applied to determine the electrical field in a planar multilayered structure exposed to a linearly polarized plane wave in the frequency band between <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">${\text{0.1 GHz}}$</tex-math></inline-formula> and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">${\text{10 GHz}}$</tex-math></inline-formula> . Additionally, the specific absorption rate (SAR), the spatial peak-average-SAR, the absorbed power density, and the temperature increase are calculated for each layer. The results of the proposed analytical method are validated by comparing them to the outcome of a full wave solver using the finite integration technique (FIT). Further, the applicability of the proposed analytical method for electromagnetic field dosimetry is assessed by comparing the obtained spatial peak-average-SAR to the results given by a voxel model.