Impact of Different Voltage Source Models on Absorbed Power Density within the Boundary Element Method Formalism

This paper deals with the impact of different voltage source models on computed absorbed power density (APD) in the framework of boundary element method formalism. Geometry of interest is a half-wave dipole antenna placed above a three-layered planar skin model (skin, fat and muscle) while operating frequencies of interest are 10, 30 and 90 GHz. Antenna current is obtained by solving the Pocklington's integro-differential equation via Galerkin-Bubnov Indirect Boundary Element Method (GB-IBEM). Delta gap (DG) and magnetic frill (MF) are used as excitation source models. Distance and antenna radius are varied. APD and related absolute relative errors are computed for MF source with respect to DG source. It is found that definition of antenna radius plays an important role in the difference between the results obtained with DG and MF sources. The relative error does not depend on frequency nor on distance from the antenna.