GaN – Based WPT System for Remote Charging Applications

Abstract

This thesis focuses on design of a power oscillator at specific frequency to send suitable power from transmitter. We used GaN transistor in the design for its high power and fast switching frequency. GaN based design is very promising in the high power and high frequency applications. The first chapter is an introductory chapter for the whole thesis, presenting the main concept and developing the thesis organization. The second chapter gives a background on the transistor used in the thesis. It also present the transistor main construction, the physical phenomena and practical measurement for the transistor in our lab. The third chapter introduces the concept of the wireless power transfer. The main application for the thesis is wireless charging for low power devices. The fourth chapter proposes the design of the power oscillator using the GaN transistor. Simulation study is presented beside the Monte Carlo study. The fifth chapter introduces a differential version of the design to double the power sent from the transmitter. The last chapter gives a comparative study between the results in this thesis and previous published work. Future works will be presented. Key words: wireless power transfer (WPT); e-GaN HEMT; class E power amplifier (PA); power oscillator (PO)