Reflection Properties of the Human Skin From 40 to 110 GHz: A Confirmation Study

Authors: Andreas Christ, Adrian Aeschbacher, Fereshteh Rouholahnejad, Theodoros Samaras, Bernadetta Tarigan, Niels Kuster

Year: 2021 Jul 21

Category: Bioelectromagnetics

Journal: Bioelectromagnetics

Institution: Bioelectromagnetics

DOI: 10.1002/bem.22362

URL: https://pubmed.ncbi.nlm.nih.gov/34289515/

Abstract

Overview

This study focuses on verifying skin models used in theoretical dosimetric studies in the GHz frequency spectrum. Researchers aimed to validate these models using actual measurements from human volunteers.

Findings

  • Empirical data was recorded by examining reflection coefficients (S11) across different body locations and skin thicknesses using specialized waveguides.
  • Measurements included participants from various demographics, assessing 21 body locations.
  • The study revealed that S11 values are dependent on the stratum corneum layer (SCL) thickness, confirming the impact of SCL on electromagnetic field reflection and hence potential health impacts.
  • No significant correlation was found between S11 values and sex of the participants.

Conclusion

The consistency of measured S11 values with previous model assumptions supports the use of layered phantoms to represent skin's electromagnetic properties accurately. This insight reinforces that electromagnetic field exposures may differ significantly based on skin composition and underscores the importance of personalized assessments in the context of EMF safety.

electromagnetic fields human skin GHz frequency reflection properties bioelectromagnetics impedance matching safety assessment
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