Title :
Correlation Between Peak Spatial-Average SAR and Temperature Increase Due to Antennas Attached to Human Trunk
Author :
Hirata, A. ; Fujiwara, Osamu ; Shiozawa, T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nagoya Inst. of Technol.
Abstract :
This paper discusses the correlation between peak spatial-average specific absorption rate (SAR) and maximum temperature increase for antennas attached to the human trunk. Frequency bands considered are 150, 400, and 900 MHz, which are assigned for occupational communications. This problem is thoroughly investigated with the aid of Green´s function. In particular, the effect of variation of thermal constants on the temperature increase is revealed by using one-dimensional model. Computational results suggests that one of the most dominant factors which affect the correlation between peak SAR and maximum temperature increase is blood flow in tissues. This is confirmed by considering a three-dimensional realistic human body model. Uncertainties caused by the calculation of peak SAR and the difference in the body model shape are also quantified
Keywords :
Green´s function methods; biological effects of microwaves; biological tissues; biothermics; haemodynamics; microwave antennas; physiological models; 150 MHz; 400 MHz; 900 MHz; Green function; antennas; blood flow; human trunk; maximum temperature increase; peak spatial average SAR; specific absorption rate; thermal constant variation; three-dimensional realistic human body model; tissues; Biological system modeling; Blood flow; Frequency; Guidelines; Humans; Neck; Safety; Specific absorption rate; Telephony; Temperature; Blood flow; Green´s function; specific absorption rate (SAR); temperature increase; Back; Body Burden; Body Temperature; Computer Simulation; Microwaves; Models, Biological; Radiation Dosage; Radio Waves; Relative Biological Effectiveness; Statistics as Topic; Thorax; Whole-Body Counting;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2006.877798
