Title :
Computation with a parallel FDTD system of human-body effect on electromagnetic absorption for portable telephones
Author :
Wang, Jianqing ; Fujiwara, Osamu ; Watanabe, Soichi ; Yamanaka, Yukio
Author_Institution :
Dept. of Electr. & Comput. Eng., Nagoya Inst. of Technol., Japan
Abstract :
Using our recently implemented parallel finite-difference time-domain computation system on Linux-based personal computers, we investigated the human-body effect on the peak specific absorption rate (SAR) in the human head for portable telephones. Taking into account the whole human body, we found that there was a difference within 5.3% for the 1- and 10-g averaged spatial peak SARs and a difference within 19% for the SAR in the brain and eyes compared to the isolated head model. Moreover, in most realistic-use positions, we found that the SAR was slightly decreased due to the body effect. These results further support the rationale of using an isolated human-head model in the SAR evaluation for portable telephones.
Keywords :
Maxwell equations; biological effects of fields; cellular radio; electromagnetic wave absorption; finite difference time-domain analysis; phantoms; physiological models; radiation protection; time-domain analysis; Maxwell´s time-domain equations; cellular phones; dosimetry; electromagnetic absorption; electromagnetic-field exposure; half-wavelength dipole; human head; human-body effect; isolated model; parallel FDTD system; peak specific absorption rate; performance evaluation; phantom model; portable telephones; Biological system modeling; Concurrent computing; Electromagnetic wave absorption; Finite difference methods; Humans; Microcomputers; Portable computers; Specific absorption rate; Telephony; Time domain analysis;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2003.821232
