Modeling RF absorption in the human body

With the expansion of current use and anticipated further increases in the use of cellular telephones and other personal communication services (PCS), there have been an interest and considerable research effort devoted to interactions between antennas on handsets and the human body. In addition to evaluation of the power deposited in the user, interference with medical devices such as hearing aids is of concern. The growth in PCS has also revived a general interest in accurate modeling of RF absorption in humans. The authors outline here some of these issues and show solutions obtained in their laboratory using the finite-difference time-domain (FDTD) method.