Continuous wave simulations on the propagation of electromagnetic fields through the human head

Characterizing the human head as a propagation medium is useful for remotely observing changes in the material properties of the body. In this study, extensive simulations were performed using the Finite Element Method (FEM) to examine the fields excited by a continuous wave. A custom human head mesh was developed to include the brain, skull, and cerebrospinal fluid (CSF). Small orthogonal coil antennas were systematically placed to generate highly directive beam through the head. These beams can be directed into the mouth where the signal can be received. Through these simulations, it was determined that certain lower-loss volumetric propagation channels may exist within the human head, which are characterized by a waveguide-like behavior.