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Energous wireless charging technology enables mobile charging within 4.7 meters
Wireless charging technology has taken another major leap forward. Energous has introduced a groundbreaking method that differs from traditional magnetic resonance systems. Instead of using inductive coupling, their technology sends radio waves to charge devices, and it claims to support movement while charging within a 4.7-meter range.
According to ExtremeTech, Energous' system can deliver up to 10 watts of power over that distance and has the capability to track the device's location in real time. The company is set to launch its products in the U.S. in January 2015, with plans to showcase new solutions at the Consumer Electronics Show (CES) alongside its partners.
Currently, most wireless charging solutions rely on magnetic resonance, such as WiTricity’s Rezence technology, which uses resonant frequencies between the charging pad and the device to transfer energy efficiently through the air.
However, Energous’ approach is different. As reported by MIT Technology Review, their system uses a small array of antennas to send radio waves to Bluetooth-identified devices. While the company hasn’t revealed all the details, ExtremeTech suggests that beamforming technology might be involved, allowing electromagnetic beams to be directed precisely at the device.
The Energous transmitter, called EnergyRouter, can charge two sets of devices simultaneously and track them as they move within the 4.7-meter range. It operates with an efficiency of around 20%, which is promising for future development.
It’s expected that devices will need to have an antenna cover installed to work with EnergyRouters, and this accessory will be showcased at CES 2015. In the long term, Energous plans to integrate the charging technology directly into devices, starting with the release of receiver and transmitter chips.
Energous is one of the few companies not relying on magnetic resonance. While WiTricity’s Rezence has gained support from big names like Intel and Qualcomm, magnetic resonance still faces physical limitations that restrict its full potential. Beamforming, on the other hand, offers a more scalable solution for wireless charging across a space.
Whether Energous or WiTricity’s technology becomes the standard, the future of wireless charging looks bright. Consumers can soon enjoy the convenience of charging their devices anywhere, anytime. Moreover, wireless charging could revolutionize smart homes and large sensor networks by providing power without the need for cords.