Simulation And Algorithm Study Of Human Electromagnetic Exposure To Complex Fields

With the wide use of electronic and electrical equipment,electromagnetic exposure environment has become more complex.The health problems of the human body in this environment have attracted widespread public attention.The complex electromagnetic environment usually contains various modes of electromagnetic waves emitted by multiple waves.The biological effects caused by complex fields are currently one of the hot issues in bio-electromagnetic research.The electromagnetic exposure dose of complex fields is the premise and basis for the study of biological effects.Previous studies based on single plane waves obviously cannot be generalized to such complex fields.Therefore,this study on the simulation of human electromagnetic exposure to complex fields is carried out.Program based on FDTD method was written to support multiple waves from any direction work at the same time.The effects of incident direction,phase difference,and polarization direction on Hole Body Average SAR(WBASAR)are considered.As a result,it has been found that the WBASAR accelerates as the angle between the two waves decreases.The phase difference has a large influence on the WBASAR when two waves incident on the same direction but not on opposite direction.The WBASAR obtained by simulation with vertical polarized waves is generally lower.Some advanced algorithms are explored and studied in this paper.There are two main parts: Aiming at the limitation of the computational efficiency,we propose the PSTD_TT method,which achieves the match of accuracy between time and space.Some numerical examples demonstrate the reliability of this method.Aiming at the limitation that FDTD method can only handle regular grids,we explored the DGTD method which has the advantage of processing irregular meshes.The Weight-Adjusted method and the mass-lumping method are compared in accuracy,memory,and performance.The innovation of this paper is to compile a set of simulation programs for complex fields and study the influence of different complex fields on electromagnetic exposure dose of human body.