Simulations of the Penetration of 60–300 GHz Radiation into the Human Ear

Human tissues have a high coefficient of absorption in the 60–300 GHz range. This focuses the study of human radiation exposure in this band to the skin and the cornea. The capacity of 60–300 GHz radiation to access the deeper parts of the ear has not been studied. Simulations show that over 90 % of the radiation that is presented parallel to the ear canal penetrates to 20mm into the canal at 60 and 90 GHz. The structures of the outer ear are highly protective, reducing penetration to 20%. At 300 GHz, the canal develops areas of up to 190% of the incident intensity, reducing to 150% when the outer ear structures are represented. These findings have important implications for the design of devices emitting 60–300 GHz radiation.