基于中国数字人电磁建模的手机天线辐射数值模拟  

Numerical Simulation of Mobile's Antenna Based on Electromagnetic Modeling of Digital Chinese

作　　者：周晓明[1] 

机构地区：[1]华南理工大学理学院物理系,广东广州510640

出　　处：《中国辐射卫生》2009年第1期8-11,共4页Chinese Journal of Radiological Health

基　　金：广东省自然科学基金项目(06025716);华南理工大学自然科学基金资助项目(123E5040920)

摘　　要：目的旨在比较由于东西方人体结构差异导致手机天线在人体内的电磁辐射剂量变化。方法应用基于数字化虚拟中国人数据集DVCH(Digitized Virtual Chinese Human)建立的人体电磁模型,采用时域有限差分法(FDTD)自主开发数值仿真软件。结果比较了基于美国可视化人体模型VHP(Visible Human Project)和DVCH建模计算所产生的辐射剂量大小,并应用生物热方程计算人体内的温度升幅。结论计算结果表明,两种人体模型内的SAR值均随距离增大而迅速衰减;比较而言,中国数字化人头模型给出的每克SAR平均值较大,而每克SAR峰值较小,这与DCVH模型体积略小于VHP模型有关;对人头内温度的数值模拟计算表明:手机辐射导致的稳态下最高温升约为0.25℃,引起脑内温度的升高在人体温度调节的正常范围内。Objective To compare the electromagnetic dosage irradiated from antenna of mobile in east and west human body models, which are somewhat different in geometry. Methods Applying the EM human model based on the digital virtual Chinese, numerical simulation software is designed with the FDTD method. Results Using this software, the differences of computed SAR results in both models of VHP and DVCH are compared, as well as the ascending temperature range in human body was measured with the bio - heat equation. Conclusion The calculation resuhs show that the SAR values decline rapidly along with increasing the distance from head to the mobile. The simulation results of temperature in human head shows that the max ascending temperature value is about 0.25℃, which is in the range of human normal adjustable temperature.

关 键 词：虚拟中国人 手机辐射 SAR 热效应 

分 类 号：X591[环境科学与工程—环境工程]