Assessment of Electromagnetic Field Exposure from Multiple Sources Simultaneously in the High- Frequency Range Based on Safety Standards

Authors: Chutchavong V, Aroonmitr P.

Year: 2025

Category: Electromagnetic Safety Assessment

Journal: 2025 SICE Festival with Annual Conference (SICE FES)

DOI: 10.23919/SICEFES67750.2025.11236585

URL: https://ieeexplore.ieee.org/document/11236585

Abstract

Overview

This study presents a method for evaluating electromagnetic field (EMF) exposure from multiple sources operating simultaneously across a wide range of frequencies, based on the guidelines defined by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) in its 2020 publication. The proposed approach uses the normalized exposure ratio, combining exposure values from all relevant sources and frequency bands.

Key Challenges

  • ⚠ Lack of standardized measurement methods: The study addresses the absence of standardized methods for absorbed power density (Sab) measurement above 10 GHz, an important gap despite defined exposure limits.
  • 📊 Comparison of limits: There is a relatively small difference between the Sab and incident power density (Sinc) limits for the general public, whereas the difference between general public and occupational exposure limits is much larger.

Proposed Solutions

  • 💡 Temporary surrogate: Suggests using Sinc as a substitute for Sab in high-frequency ranges until direct measurement becomes feasible.
  • ⛏️ Comprehensive assessment: Enables coverage of both near-field and far-field exposures from multiple RF sources.
  • 📱 5G Implications: Especially relevant for modern technologies such as 5G, WiGig, and other next-generation wireless systems.

Conclusion

The study offers a practical approach for comprehensive assessment of human EMF exposure from multiple simultaneous sources, supporting the design of safety measures and compliance verification for radiocommunication equipment in high-frequency environments. This is important for ensuring public and occupational safety as new high-frequency wireless technologies proliferate. The authors stress the need for future experimental validation and the development of standardized Sab measurement techniques.

Important Note: Exposure to electromagnetic fields, especially from combined high-frequency sources as found in 5G and similar technologies, has clear established exposure limits to protect human health. Comprehensive assessment, as outlined here, is essential to ensure these limits are not exceeded and that EMF-related health risks are minimized.

EMF exposure safety standards high-frequency ICNIRP 5G absorbed power density RF compliance
← Back to Stats