人體吸收電磁能量與入射方向和極化的關系
THE RELATIONSHIP BETWEEN THE EM ENERGY ABSORPTION OF HUMAN BODY AND THE INCIDENT DIRECTION AND POLARIZATION OF PLANE WAVE
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摘要: 本文討論了用時域有限差分法計算在平面電磁波照射下人體對電磁能量的吸收問題。計算了各種入射方向和極化條件下非均勻塊狀人體模型中的局部比吸收率(SAR)分布。計算結果表明,人體并不總是在正面入射時吸收能量最多;同時還表明,局部比吸收率比平均比吸收率更值得重視,因為局部吸收率的最大值往往比全身平均值大幾倍到十幾倍。本文的計算結果豐富了人們在人體電磁劑量學方面的知識。Abstract: The problems of EM energy absorption of human body irradiated by plane wave are discussed by using the Finite-Difference Time-Domain (FD-TD) method. The local SAR (Specific Absorption Rare), the whole-body-averaged SAR and the layer-averaged SAR for the inhomogenous block model of human body with different incident direction and different polarization of the incident waves are calculated. The results show that the appearance of maximum EM energy absorption is not always at the situation of the front inciden...
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