Simulation of human head exposed to handset using hybrid NFM/MoM techniques

The head of the user of a mobile telephone is modeled by a two-layered prolate excited by the near field of a patch antenna. A hybrid null field method/method of moments (NFM/MoM) numerical method is investigated in this paper. NFM is used to solve the scattering problem from the head model, and the MoM using the Rao-Wilton Glisson (RWG) basis functions is applied to model the dipole antenna by distributing a voltage source on a virtual surface lying inside the antenna physical surface, in which the delta-function generator is used to model the feed point. The coupling between the head model and a finite-length dipole antenna is considered by an iteration procedure. The accuracy and efficiency of the proposed algorithm are verified by comparing numerical results with other available data.