Wireless Power Receiving Unit. Analysis, design and implementation of inductive power receiving unit for wireless circuits

Abstract

Going wireless has revolutionised handheld and wearable devices today. On comparing battery technology with other aspects of portable device technology, it has been a bottleneck in new innovation of miniaturised electronic devices. In this work, first energy harvesting techniques are discussed followed by wireless power transfer methods. Eventually it is concluded that magnetic resonance inductive power transfer method is most suitable to implement as wireless power transfer method. Then this technique of cordless power transfer is discussed, analysed and implemented assuming BLE as a typical load to be wirelessly powered or charged. In the course of WPT implementation, the modules like inductive link, rectifier and LDO are designed in 90nm CMOS tech- nology. Finally WPT chip is designed and produced. This project con- cludes with comparison of simulated and measured performance of the WPT chip.