微波暴露人体比吸收率(SAR)的分布研究

FDTD CALCULATIONS OF SPECIFIC ABSORPTION RATE (SAR) IN A MODEL OF THE HUMAN BODY AT 3 GHz

本文采用时域有限差分法和仿真人体电磁模型,计算并比较了E、H二种极化方向和前向、后向、左侧向、右侧向四种照射几何条件下,3GHz微波人体暴露的全身平均比吸收率(SAR)、器官平均SAR和最大峰值SAR。结果表明,H极化、前向照射几何条件下人体的平均SAR较高,其中眼睛和睾丸的器官剂量最高。上述结果为3GHz微波生物效应的实验设计提供了科学依据。

Finite-difference time-domain （FDTD） calculations have been performed to investigate the specific absorption rate （SAR） in the model of human body at 3 GHz. Exposure conditions include both vertical and horizontal polarization, and AP, PA, LLAT and RLAT irradiation geometry. The whole-body averaged SAR, organ averaged SAR and maximum SAR were computed and compared. Results showed that, when the electric field was horizontally polarized and AP irradiation geometry, the model absorbed more energy. The average SAR and maximum SAR of eyes and testis were higher than in other organs. These results provide dosimetry reference for the bio-effects experiments at 3 GHz.