ABSTRACT
This chapter discusses the various advantages of wireless charging and its major applications in different areas. Wireless charging technologies can be broadly classified into nonradiative coupling-based charging and radiative based charging. The former consists of three techniques: inductive coupling, magnetic resonance coupling, and capacitive coupling, while the latter can be further sorted into directive Radiofrequency (RF) power beamforming, nondirective RF power transfer, and non-RF transfer. In general, wireless charging technology is treated as a nonradio device; however in some cases, a distinction is made whether the wireless power device uses a communication protocol in the form of modulation on the wireless charging frequency. There are currently two prevailing wireless charging industry standards: Qi owned by the Wireless Power Consortium (WPC) and the other, which covers both inductive and resonant charging methods, is published by the AirFuel Alliance. The AirFuel Alliance was formed by the merger of two standards, namely the Alliance for Wireless Power and the Power Matters Alliance.
