Interaction of Two Cross-Polarized Electromagnetic Waves with Mammalian Cranial Structures

A study has been made of the interaction of two crosspolarized plane electromagnetic waves with six-layered spherical models of a mammalian head. The numerical results indicate that the absorbed powers induced inside small animal and human heads by incident circularly polarized waves and linearly polarized waves are very similar except that the absorbed power in the planes transverse to the direction of propagation is uniform for the cross-polarized wave. It is also shown that the average absorbed power depends strongly on the frequency and head size involved. The maximum absorbed powers in a given size spherical head vary only slightly with frequency for the two frequencies studied. However, since a greater amount of the absorbed power occurs in the inner sphere representing the brain of a human head when 918 MHz rather than 2450 MHz is used, the former constitutes a greater health hazard to man at the same incident power.