TY - JOUR
T1 - The effects of frequency, polarization, direction and metallic objects on the SAR values in a human head model for plane wave exposure (500-2500 MHZ)
AU - Yelkenci, Tanju
AU - Paker, Selcuk
PY - 2006
Y1 - 2006
N2 - This paper presents the effects of different radiation characteristics on the Specific Absorption Rate (SAR) values induced within a 2mm resolution, anatomically detailed, realistic model of human head by including a metallic spectacle frame and metallic tooth caps. The head is illuminated by a plane wave source with seven different frequencies from 500MHz to 2500MHz, with five different incident directions and three polarizations. The electromagnetic (EM) fields are computed using the Finite-Difference-Time-Domain (FDTD) method. The calculated local SAR values are averaged over 1g and 10g tissues as proposed by IEEE standards. It is shown that, the existence of a metallic spectacle frame causes an increase in the SAR values. However, the results indicate that, metallic tooth caps have negligible influence on the SAR values.
AB - This paper presents the effects of different radiation characteristics on the Specific Absorption Rate (SAR) values induced within a 2mm resolution, anatomically detailed, realistic model of human head by including a metallic spectacle frame and metallic tooth caps. The head is illuminated by a plane wave source with seven different frequencies from 500MHz to 2500MHz, with five different incident directions and three polarizations. The electromagnetic (EM) fields are computed using the Finite-Difference-Time-Domain (FDTD) method. The calculated local SAR values are averaged over 1g and 10g tissues as proposed by IEEE standards. It is shown that, the existence of a metallic spectacle frame causes an increase in the SAR values. However, the results indicate that, metallic tooth caps have negligible influence on the SAR values.
KW - Electromagnetic radiation
KW - Finite difference time domain (FDTD) method
KW - RF exposure
KW - Specific absorption rate (SAR)
UR - http://www.scopus.com/inward/record.url?scp=33846025462&partnerID=8YFLogxK
U2 - 10.1515/FREQ.2006.60.11-12.215
DO - 10.1515/FREQ.2006.60.11-12.215
M3 - Article
AN - SCOPUS:33846025462
SN - 0016-1136
VL - 60
SP - 215
EP - 219
JO - Frequenz
JF - Frequenz
IS - 11-12
ER -