Hirata Akimasa, Fujiwara Osamu, Shiozawa Toshiyuki
Department of Electrical and Computer Engineering, Nagoya Institute of Technology, Aichi, Japan.
IEEE Trans Biomed Eng. 2006 Aug;53(8):1658-64. doi: 10.1109/TBME.2006.877798.
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 throughly 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.
本文讨论了附着在人体躯干上的天线的峰值空间平均比吸收率（SAR）与最大温度升高之间的相关性。所考虑的频段为150、400和900兆赫兹，这些频段用于职业通信。借助格林函数对该问题进行了深入研究。特别是，通过使用一维模型揭示了热常数变化对温度升高的影响。计算结果表明，影响峰值SAR与最大温度升高之间相关性的最主要因素之一是组织中的血流。通过考虑三维真实人体模型证实了这一点。还对峰值SAR计算引起的不确定性以及人体模型形状差异进行了量化。
