Wireless Power Transfer Via Microwave for Mobilities

This chapter provides a comprehensive review of microwave wireless power transmission, focusing on its application to the aircraft including the drone and unmanned aerial vehicles (UAVs). Focusing on the key element of these systems, the rectifier circuit, this work outlines the principles of rectification, application of high-frequency rectifiers, and specific band rectifier circuits. Furthermore, the chapter discusses the comparative advantages of wireless power transfer over battery systems for UAVs. It also delves into the feasibility of microwave-powered flight, examining factors such as beam collecting and capture efficiency, and RF-DC conversion efficiency. The dependency of operation frequency and the design of mobile devices for flight demonstration are analyzed as well. The research herein contributes significantly to the advancement of UAV technology and energy harvesting.