History and Innovation of Wireless Power Transfer via Microwaves

Wireless power transfer (WPT) has a long history of over 100 years since the first experiment conducted by Nicola Tesla. However, most interesting innovation WPT was born in 21 st century. In this decade, near-field commercialization advanced, and we now use many products, such as wireless chargers for mobile phones electric vehicles. next can expect development far-field via microwaves, through which drive Internet Things (IoT) sensors without batteries based on transmitted or ambient microwave power. We charge with When focus target beam forming technology, transmit higher to fly drones from space earth. conjunction research & microwave-based WPT, radio regulations suitable each country need be discussed. paper, I review history, innovation, status microwaves classification wide-beam including harvesting, narrow-beam WPT.