Comparison of electromagnetic exposure for passengers at different positions on the subway platform

Authors: Li J, Lu M

Year: 2022

Category: Environmental Health

Journal: EMIE 2022

Institution: The 2nd International Conference on Electronic Materials and Information Engineering, Hangzhou, China

URL: https://ieeexplore.ieee.org/document/10048274

Abstract

Overview

This study aims to evaluate the safety of electromagnetic exposure for passengers at different positions on a subway platform. A High Frequency Structure Simulator (HFSS) software was employed to simulate this exposure.

Methodology

  • A leakage coaxial cable model is used as the exposure source.
  • Models of adult and child passengers are incorporated into the simulation.
  • Three waiting positions (labelled A, B, and C) with an interval of 1.5 meters are analyzed.
  • The specific absorption rate (SAR) of electromagnetic radiation on passengers is calculated at a frequency of 900 MHz.

Findings

  • The highest SAR values were observed in position A, closest to the leakage source, registering 1.5859×10(exp -7) and 1.0854×10(exp -7) W/kg for adults and children respectively.
  • Comparatively, the child's brain tissue absorbs between 2.80 and 4.98 times more SAR than the adult's brain tissue at positions A and C.
  • Despite the differences, the SAR levels are well below the International Commission on Non-Ionizing Radiation Protection limits and suggest no significant health risks for both adult and child passengers.

Conclusion

The study indicates while there are measurable differences in electromagnetic absorption between adults and children at varying positions on the subway platform, the levels of exposure are well below harmful limits.

electromagnetic exposure subway platform SAR values health risks simulation child safety
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