Numerical method for exposure assessment in the low-frequency ranges

This paper proposes an effective numerical method for electromagnetic field exposure assessment using anatomical human-body voxel model in the low-frequency ranges. The proposed method is based on the quasi-static finite-difference time-domain method which can rapidly solve the electromagnetic interaction with heterogeneous dielectric and conductive body excited by plane wave even in low-frequency ranges. The equivalent principle is employed to solve the arbitrary source problems. To verify the proposed approach, the internal electric field induced in the simplified human phantom of sphere model exposed to magnetic dipole source is obtained by our approach and compared to those from theory.