Electric field and specific absorption rate (SAR) analysis in multilayered skin tissue exposed to 5G mobile communication frequencies

Abstract

This paper presents the electric field and specific absorption rate (SAR) distribution in the multilayered skin tissue exposed to 5G mobile frequencies, viz. 28 GHz, 38 GHz and 60 GHz. Presently, the safety limits for electromagnetic wave exposure above 6GHz are expressed in terms of power density by Federal Communications Commission (FCC). This study estimates the SAR values compliant to mentioned power densities. In the numerical scheme, Maxwell’s equation is employed to determine electric field, and SAR is estimated using electric field values. Results show that most of the energy associated with the 5G frequencies is absorbed in epidermis layer of skin tissue. Maximum electric field and SAR values are predicted in skin tissue exposed to 38 GHz radiation, while least electric field and SAR values are found at 60 GHz. 60 GHz can be considered the safest among all three frequencies for 5G mobile communications.