Abstract

Overview

This study investigates cloaked human skin's exposure to obliquely incident electromagnetic waves at 60 GHz. The research focuses on the effects of different variables such as cloth material, incidence angle, and polarization on transmittance and absorbed power density (APD) on skin surface.

Findings

• The Monte Carlo simulation takes into account the thickness variation of the cloth material and skin tissue.
• For transverse magnetic wave exposure, transmittance increases with the incident angle, displaying maximum transmittance within 60 to 80 degrees, known as the Brewster effects.
• The air gap between cloth and skin causes a periodic fluctuation in APD, almost within 1 dB under consistent irradiation conditions and an angle of lesser than 40 degrees.
• In cases where the air gap increased to 2.5 mm, APD on the skin covered by typical cloth materials rose by up to 40% compared to bare skin.

Conclusion

The study confirms that while certain cloth materials can increase both transmittance and APD under oblique incidences, APD levels observed do not surpass guidelines that restrict local exposure, establishing that current standards are sufficient to prevent overexposure to electromagnetic fields at 60 GHz considering angle and material impacts.