Abstract

Overview

This study meticulously explores the exposure of clothed human skin to electromagnetic waves, specifically at a frequency of 60 GHz and with oblique angles of incidence. A detailed Monte Carlo simulation method is utilized to account for variations in cloth thickness and skin tissue density.

Findings

• The impact of cloth material, incidence angle, and polarization on electromagnetic wave transmittance and Absorbed Power Density (APD) at the skin surface is analyzed.
• Increases in the incident angle enhance transmittance up to a maximum, known as the Brewster effects, evident between 60° and 80° angles.
• The presence of an air gap between the cloth and skin creates periodic fluctuations in APD, which remain within 1 dB under certain conditions.
• In scenarios where the air gap is augmented to 2.5 mm, APD increases by up to 40% compared to bare skin exposure, highlighting significant potential risks.

Conclusion

While different clothing materials can modify transmittance and APD when considering oblique incidence angles, the study confirms that current guidelines appropriately prevent excessive electromagnetic exposure at 60 GHz. However, the observed increases in APD with variable air gaps underline the necessity for caution in safety guidelines to address potential health risks due to enhanced exposure levels.