MagMIMOHotspot Read
Magnetic MIMO: how to charge your phone in your pocket Motivation Current wireless chargers need to remember to regularly charge our mobile phones which is not the wireless charging we hoped for. We would like to have our cell phones charged in our pockets, and never again worry about forgetting to charge the phone. MIMO RF techniques power phones remotely, however, delivering a large amount of power via radiation can cause local heating inside the human body. Contribution They propose a novel design that focuses the magnetic flux from multiple coils in a steerable beam and points it at the phone, in a manner analogous to multi-antenna beamforming in wireless communications. The design can charge unmodified smart phones at distances up to 40 cm, and works regardless of the phone orientation with respect to the charging pad. Magnetic-Beamforming Figure 1: Illustration of the analogies between standard MIMO and MagMIMO. For a 2-antenna MIMO transmitter.
