Millimeter Wave Wireless Power Transmission-Technologies and Applications

This paper focuses on the development of a new class of millimeter wave transmitters for wireless power beaming at standoff distances together with rectenna receiver concepts for high efficiency and power handling. The 92 GHz transmitter is capable of > 7kW of radiated power which can be focused on a rectenna receiver at meters to kilometers. The paper discusses the component technologies such as the transmitter power modules and its scalability. The rectenna receiver technologies will also be discussed showcasing GaAs, GaN semiconductor technology circuits and new trends in the device technologies that will allow improved Overall performance. A nano-Schottky GaN rectifier is designed fabricated and tested highlighting a cut off frequency of 0.1 THz with an associated 70V breakdown voltage for next generation high power millimeter wave rectenna circuits is introduced.