Wireless Power Transfer for IoT Applications—A Review

For a very long time, classical wire networks were the primary method of transmitting electricity. Traditional cable (wire) transmission has issues, including ageing, wear, and electric spark production. In some environments, including the alpine and seafloor, it is challenging to utilize transmission lines since doing so compromises their usability's safety and dependability. The transmission of electricity can undergo a paradigm change thanks to wireless power transfer (WPT), which has radically revolutionized the process. WPT is a significant method for transmitting electrical energy over a long distance and across a vacuum or environment without the need for wires or other materials. A totally theoretical idea that is now a common feature in commercial items, particularly mobile phones and wearable smart gadgets, is wireless charging. 2014 has witnessed the release of the newest high-end smartphones from leading mobile providers including Huawei and Samsung. These gadgets may wirelessly recharge. Many businesses are now working on technologies that can transmit power via an air gap of 15 to 30 cm with tolerable efficiency, including Qualcomm, Evatran, and WiTricity. An overview of wireless power transmission techniques is given in this chapter. The chapter also focuses on current issues and potential growth in the field.