An analysis of a dipole antenna near a prolate head model using a hybrid NFM/MoM approach

A hybrid approach using null field (NFM) method and method of moments (MoM) is proposed to solve the radiation problem of a dipole antenna near a prolate head model. In the proposed approach, the electromagnetic fields in the prolate, which is used to emulate a human head, is modeled by NFM and the dipole antenna is analyzed by MoM. The mutual coupling between the dipole antenna and the head model is fully taken into account by an iterative process. The proposed hybrid method combines the analytical attribute of NFM and the flexibility of MoM and can be extended to analyzing a system of multiple regions with different algorithms. Numerical results concerning the field inside the head model, and the input impedance of the antenna are presented. The accuracy and efficiency of the proposed algorithm are verified by comparing numerical results with other available data.