Mobile phone antenna-matching study with different finger positions on an inhomogeneous human model

Abstract

Overview

The research focuses on how the human head and hand in close proximity to a mobile phone antenna affect its matching with free space. This study is executed using an inhomogeneous human model, varying the positions and distances of the hand and fingers relative to a mobile phone.

Findings

• The study emphasizes the specific absorption rate (SAR) as the sole safety criterion, dictated by regulatory bodies such as the FCC in the USA and the ICNIRP in Europe, for assessing RF exposure's impact on humans.
• Manufacturers determine the SAR maximum values for each mobile handset model, but it’s suggested that these assessments may require refinement due to oversimplified assumptions in physical measurements or numeric estimations.
• The research has identified a strong dependence of SAR values on antenna communication matching, which could fluctuate significantly with different exposure scenarios and factors such as the Automatic Gain Control (AGC) adjusting power based on signal strength.

Conclusion

This study highlights crucial insights into the complexities of evaluating mobile phone safety, indicating a potential underestimation of health risks associated with RF exposure from mobile phones.