Computational Assessment of RF Exposure Levels due to 5G Mobile Phones

Abstract

Overview

The study aimed to enhance understanding of human RF-EMF exposure linked to the adoption of the mm-wave spectrum in 5th generation (5G) mobile phones. This research particularly investigates the impact of innovative antenna technologies, such as high gain, beamforming capabilities, and mm-Wave bands.

Methodology

• A phased array antenna with 8 elements operating at 27 GHz was modeled.
• Simulations included a mobile phone user and a bystander, using the Sim4Life platform.
• Three different skin layer models were tested to evaluate the peak absorbed power density.

Findings

The multi-layer skin model revealed significant differences in the absorbed power density, highlighting an underestimation of exposure levels by up to 55% when using a homogeneous skin model. Especially notable was the exposure of a bystander, who experienced slightly higher levels of RF-EMF exposure compared to the direct user.

Conclusion

Despite these findings indicating potentially higher levels of exposure due to more accurate modeling, all measured exposure values were within the safe limits set by the ICNIRP guidelines. The data implies that the current safety guidelines adequately protect against the specified levels of RF exposure from 5G mobile phones. However, the observed discrepancy with multi-layer modeling suggests a need for ongoing monitoring and revision of safety measures as technology evolves.