OPPO Kernel Craftsman

Apr 30, 2021 · Fundamentals

Wireless Charging Technology: Principles, Qi Protocol, and Future Directions

Wireless charging, revived by smartphones, relies chiefly on magnetic induction as defined by the Qi protocol, which uses resonant coils, backscatter communication, and foreign‑object detection to safely transfer up to 15 W, while future research explores higher‑power, microwave and over‑air solutions.