ESTIMATION OF WHOLE-BODY AVERAGE SAR IN HUMAN BODY EXPOSED TO A BASE STATION ANTENNA

Abstract

Electromagnetic wave absorption inside a human body is investigated. The human body has been modeled using 3D voxel based dataset considering difierent electrical parameters. At GSM 900 band, Speciflc Absorption Rate (SAR) induced inside the human body model exposed to a radiating base station antenna (BSA) has been calculated for multiple number of carrier frequencies and input power of 20W/carrier. Distance (R) of human body from BSA is varied in the range of 0.5m to 5.0m. Values of whole-body average SAR obtained by hybrid FDTD method closely match with that obtained by SFDTD method. For number of carrier frequency equal to flve and R = 0:5m, maximum value of whole-body average SAR obtained by both hybrid FDTD and SFDTD method is found to be 0.69W/kg which decreases either with increase of R or decrease of number of carrier frequencies. Safety distance for general public is found to be 1.5m for number of carrier frequencies equal to flve. Summary of performance comparison shows that hybrid FDTD method is faster and requires less memory than SFDTD method.