Development of Highly-Efficient Near-Field WPT and RCN-Based Rectifier for IoT Sensors

Abstract

This paper presents a highly-efficient wireless power transfer (WPT) system intended to charge various Internet of things devices. The developed system consists of a compact WPT and resistance compression network (RCN)-based rectifier. Furthermore, both circuits operate at the practical frequency of 433 MHz. It is imperative to mention that realized near-field WPT showed 74% power transfer efficiency for the working distance of 20 mm. In addition, the RCN-based rectifier demonstrated a power conversion efficiency of around 60%.