Absorbed Power Density in a Multilayer Tissue Model due to Radiation of Dipole Antenna at GHz Frequency Range: Part I Theoretical Background

The paper deals with a theoretical background for the assessment of the absorbed power density $(S_{ab})$ in the planar multilayer model of the human tissue due to radiation of dipole antenna based on analytical/numerical approach. The reflecting/transmitting phenomena in multilayer tissue model are taken into account via the corresponding reflection/transmission coefficient stemming from Fresnel plane wave approximation. Radiation of dipole antenna above a multilayer is analysed by solving the Pocklington integro-differential equation and related integral expressions for the radiated electric and magnetic fields. An outline of applied numerical procedure is given, as well.