5G手机天线辐照特性及其在人体头部中温度场分布  

Exposure characteristics of 5G mobile phone antenna and its temperature field distribution in the human head

作　　者：陈登鹏 逯迈 CHEN Dengpeng;LU Mai(Key Laboratory of Opt-Electronic Technology and Intelligent Control of Ministry of Education,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学光电技术与智能控制教育部重点实验室,兰州730070

出　　处：《辐射研究与辐射工艺学报》2021年第3期73-88,共16页Journal of Radiation Research and Radiation Processing

基　　金：国家自然科学基金(51567015、51867014);甘肃省教育厅项目(2018D-08)资助。

摘　　要：为了研究5G手机天线电磁辐照对人体头部比吸收率(SAR)和温度场分布的影响,在COMSOL仿真软件中建立多频段5G手机模型以及代表人体头部组织皮肤层、颅骨层和大脑层的三层球形人体头部模型,对两种常用的手机天线输入功率和4种工作频率情况下,手机电磁辐照对人体头部各层SAR值和温度场分布进行仿真计算。仿真结果表明:两种输入功率中,1900 MHz时皮肤层SAR值最大,为0.715 W/kg,其对应的表面温度最高,达37.209℃;当手机离人体头部的距离由5 mm增大到30 mm时,皮肤层SAR值最大减小50.20%,但温度场最大减小仅为0.180%。所有仿真计算结果所得SAR值和温度场的分布均低于国际非电离辐射防护委员会(International Commission on Non-Ionizing Radiation Protection,ICNIRP)的规定限值。说明5G手机天线所致人体头部的电磁辐照和温度场的分布是安全的。In order to study the effect of specific absorption of electromagnetic radiation and temperature field distributions from 5G mobile phone antenna on the human head,the multi band 5G mobile phone model and threelayer spherical head model representing the scalp,skull and brain layers of the human head tissue were established using COMSOL simulation software.The special absorption rate(SAR)and temperature field distribution of each layer of the human head caused by electromagnetic exposure of mobile phones with two kinds of commonly used antenna input power and four kinds of working frequencies were simulated.The simulation results showed that,for the two input powers,the maximum SAR value in the scalp layer is 0.715 W/kg at 1900 MHz,and the corresponding surface temperature is the highest,reaching a value up to 37.209℃.When the distance from the mobile phone to the head increases from 5 mm to 30 mm,the maximum SAR value decreases by 50.20%,however,the maximum temperature field reduction is only 0.180%.The simulation results showed that all SAR values and temperature field distributions are lower than the limits prescribed by the International Commission on Non-Ionizing Radiation Protection(ICNIRP).Based on the results,the distribution of electromagnetic radiation and temperature field in the human head caused by 5G mobile phone antenna is considered safe.

关 键 词：5G手机天线 多频段 电磁辐照 比吸收率 温度场分布 

分 类 号：TL75+1[核科学技术—辐射防护及环境保护] TB942[一般工业技术—计量学]