The effect of metal objects on the SAR and temperature increase in the human head exposed to dipole antenna (numerical analysis)

Abstract

Overview

Interference from wearable metal objects and the alteration of electromagnetic (EM) radiation leads to significant changes in energy absorption within human tissues. This study examines these effects using numerical analysis on a realistic model of the human head.

Findings

• A half-wavelength dipole antenna at 1800 MHz shows increased specific absorption rate (SAR) and temperature when metal objects are nearby.
• Different shapes and sizes of metal objects, including spectacles, redistribute EM fields, concentrating power absorption and thereby increasing SAR and temperature in localized areas.
• Particular distances between the antenna and metal objects are necessary for effective energy coupling, which can significantly impact tissue absorption.
• Effects of metal objects on EM absorption could pose health risks, highlighting the urgency to better understand EM radiation's impact on tissues.

Conclusion

The study underscores the significant role that metal objects play in modifying the distribution of EM energy within the human head. These findings are crucial for public health safety, especially for individuals regularly exposed to EM fields via mobile devices.