Abstract

Overview

Far-field Wireless Power Transfer (FWPT) is significantly gaining traction for powering Internet of Things (IoT) devices, where Electromagnetic Radiation (EMR) safety is becoming a critical concern. Current research predominantly focuses on enhancing remote charging efficiency but often overlooks the implications of EMR.

Findings

• This study introduces a new theoretical framework for calculating Electromagnetic Radiation (EMR) and outlines the concept of Charging Restricted Area (CRA) to mitigate harmful EMR effects.
• The wireless charging EMR issue is conceptually transformed into a linear programming problem to develop safe charging through the Sampling Safety Charging (SSC) algorithm.
• Extensive experiments validate the proposed SSC algorithm's efficacy, showcasing superior performance compared to existing ROSE (RObustlySafE) algorithm.

Conclusion

The study successfully addresses the EMR safety concerns in FWPT by ensuring EMR remains below safety thresholds through strategic charger power adjustments and introduces a robust algorithmic approach to wireless power distribution.