一种RPIM法的5G VR眼镜设备辐射分析

Electromagnetic exposure analysis of 5G VR glasses by RPIM algorithm

提出了一种基于平均介电共形技术改进的径向点插值算法(Radial Point Interpolation Method,RPIM)用于5G VR眼镜设备的辐射分析。采用平均介电共形技术,利用等效介电常数以及等效电导率修正传统RPIM法场迭代方程,以评估佩戴5G VR眼镜时的人眼比吸收率(Specific Absorption Rate,SAR)的分布和温度升高值。仿真测试结果表明,在2.4 GHz下角膜的最大SAR值为2.242 W/kg,30 min内平均温度升高为0.25℃,可能会引起眼部疾病。所提算法与FDTD法相比,测量结果相近,计算时间减少了17.6%,具有更好的计算效率,同时,克服了介质参数阶跃较大带来的阶跃误差等问题。

An improved radial point interpolation method(RPIM)based on average dielectric conformal technology is proposed for radiation analysis of 5G virtual reality(VR)glasses equipment.The average dielectric conformal technology is adopted.The equivalent dielectric constant and the equivalent conductivity are used to modify the traditional RPIM method field iteration equation,in order to evaluate the specific absorption rate(SAR)distribution and the temperature rise of the human eye when wearing 5G VR glasses.Simulation results show that the maximum SAR value of the cornea at 2.4 GHz is 2.242 W/kg,and the average temperature rises by 0.25℃within 30 minutes,which may cause eye diseases.Compared with the finite difference time domain(FDTD)method,the measurement results of the proposed algorithm are similar,the consumed calculation time is reduced by 17.6%,and the calculation efficiency is higher.At the same time,it overcomes the problem of step error caused by the large step of the medium parameter.