摘要
应用时域有限差分法和包括人头、胸、手在内的分辨率为 0 .655cm的人体非均匀立方块模型 ,本文在 90 0MHz分析了λ/ 4移动通信手机天线在 6种使用方式下对人体作用的比吸收率 (SAR)分布。在考虑人体内基础新陈代谢率、吸收电磁能等热源 ,组织间通过传导和血液灌流进行的热传递 ,及与外界通过辐射、对流、无感觉出汗等进行的热交换的因素下 ,用交替方向隐式有限差分法求解生物热传导方程 ,得到手机作用下人体内的温度分布。分析表明 ,辐射功率约为 1W的手机 ,在两种典型使用方式下 ,在脑内和眼内的最大温升分别为 0 .0 39℃和 0 .0 66℃ ,落于人体核心温度变化的正常范围内 ( 37.0± 0 .5℃ )。
The Specific Absorption Rate (SAR) at 900MHz in the human body was investigated after exposure to near field radiation from a model of handset mounted with 1/4 wavelength monopole antenna in different positions and orientations to human body. FDTD method and a cube of 6.55mm anatomically based model of the human body was used in the calculation. The highlight of the investigation waw that not only the head and hand but also the chest were considered in thehuman model. The temperature increase in the head was investigated for two typical handset position at 900MHz with bio heat conduction equation including effect of internal metabolic heat generation, EM energy deposition, heat conduction through the tissue, convective heat transfer by blood, evaporative heat dissipation by insensible perspiration, and heat transfer to environment by radiation and convection. It showed that the maximum temperature increase in the eye and brain were 0.066℃ and 0.039℃, respectively, which were in the normal fluctuation of human body kere temperature (37.0±0.5℃).
出处
《中国生物医学工程学报》
EI
CAS
CSCD
北大核心
2000年第4期441-448,共8页
Chinese Journal of Biomedical Engineering
基金
国家自然科学基金资助项目
关键词
手机天线
人体
温度
时域有限差分法
比吸收率
Handset antenna
Human body
Finite difference time domain method
Temperature distribution
Specific Absorption Rate
