Should SAR Guidelines Include Variability?

Authors: K. Masumnia-Bisheh, C. Furse

Year: 2021

Category: Electromagnetic Field Safety

Journal: IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)

Institution: IEEE

DOI: 10.1109/APS/URSI47566.2021.9703740

URL: https://ieeexplore.ieee.org/document/9703740

Abstract

Overview

The research explores the significance of including variability in Specific Absorption Rate (SAR) guidelines, focused on 1-g and 10-g measurements. Key methods utilized in the study include stochastic finite difference time domain (S-FDTD) and Monte Carlo simulations.

Findings

  • Variability in tissue dielectric properties affects peak SAR values.
  • A 3D head model with variable properties was tested at two different frequencies (835 MHz and 1900 MHz) using a half wave dipole antenna.
  • The variability in SAR rates is considered significant, suggesting that standard SAR guidelines might underrepresent true exposure scenarios.

Conclusion

The study concludes that the existing variability in tissue properties notably impacts SAR values, especially at multiple frequencies. This points to a need for reassessing SAR guidelines for more accurate assessment of cell phone safety, particularly under real-world conditions that consider the latest 5G technologies.

SAR dielectric properties electromagnetic fields Monte Carlo methods cell phone safety
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