Research On Meshless Radial Point Interpolation Method In Electromagnetic Simulation Of Humam Body

With the development of wireless communication,the environment of electromagnetic radiation is more and more complicated.This paper proposes an algorithm of meshless radial point interpolation method in electromagnetic radiation estimate of the human body,and calculates the dose of human radiation in Huygens box.Comparison with the finite difference time domain method,this method has higher accuracy,reduces the memory consumption and computation time,and improves the computational efficiency.The main work of this dissertation is as follows:(1)The radial point interpolation method iterative equation is deduced in vacuum and lossy medium,which is based on the theory of meshless radial point interpolation method and finite difference time domain method.Combined with the PML,this paper designs the numerical calculation software for human electromagnetic radiation.(2)A regular rectangular staggered node distribution is designed to complete the data processing of human high precision digital volume model.According to the discontinuous boundary condition,the field discontinuity problem in human tissue interface is solved by the radial point interpolation method,and the whole body digital modeling is completed.(3)This paper analyzes the factors affecting calculation precision in the human body radiation numerical simulation,and proposes an improved local shape factor calibration method to deal with the optimal parameter selection problem.The method simplifies parameter setting and interpolation calculation process,and enhances the calculation efficiency.The distribution of electromagnetic field and SAR in human tissue is obtained by simulation calculation.Compared with the finite difference time domain method,the radial point interpolation method has higher resolution(10-10 W/kg-10-11W/kg)and accuracy(10-4 W/kg-10-5W/kg).Data analysis verifies the effectiveness of proposed scheme.