Wireless charging using RF waves
The recent Mobile World Congress saw demos of two emerging wireless charging technologies.
Energous demonstrated a prototype set up as a transmitter, capable of sending power via radio frequencies to a smartwatch, a phone and a pair of wireless earbuds up to one metre (3 feet) away. It has also secured FCC approval.
Ossia demonstrated a device that transmits power using radio frequencies in the same 2.4GHz band as Wi-Fi, but at a different channel to avoid interference. It can charge phones from a distance of around three metres (10 feet). Charging speed goes down as you move away. The device was able to charge even when the smartphone was kept in a pocket.
Both the inventors are looking for manufacturers who can integrate the technology into chipsets and compact devices. So there is a lot of scope for different manufacturers to provide integrated solutions.
Wireless charging offers opportunities for automotive, healthcare and other industries that provide Smart Cities solutions. It will increase mobility by allowing Internet of Things (IoT) devices to charge wirelessly.