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

Abstract

Abstract Summary

Overview

The study measures electromagnetic exposures on different areas of a subway platform to assess safety implications for passengers using High Frequency Structure Simulator software. This involves a detailed simulation to mimic a real-life subway setting with designated waiting areas and a leakage coaxial cable acting as the source of radiation.

Methodology

• Three waiting positions labeled A, B, and C on the subway platform were chosen, spaced 1.5 meters apart.
• Simulation at a frequency of 900 MHz to calculate the specific absorption rates (SAR) in both adults and children.

Findings

Significantly, the highest SAR values were recorded at Position A, closest to the source of electromagnetic exposure. Here, adult SAR peaked at 1.5859×10^-7 W/kg and children's at 1.0854×10^-7 W/kg. Furthermore, children's brain tissue showed SAR values up to almost five times higher than that in adults at the same location.

Conclusion

Despite the higher SAR values at closer positions to the leakage source and significantly higher absorption in children, the levels remain well below safety limits set by the International Commission on Non-Ionizing Radiation Protection. However, the elevated exposure levels in children's brain tissue suggest a potential risk that warrants attention and further study to ensure their safety against electromagnetic fields.