sulabh swatchh bharat

Tuesday, 25-June-2019


New York| What if you can remotely charge your Smartphone with the flat-screen TV in your living room? If we believe a team of US engineers, turning your living room into a wireless charging station is not a far-fetched dream

The flat-screen technology can produce a wide-range, wireless power transfer devices, say engineers from Duke University and University of Washington, adding that the technology already exists to build such a system and it is only a matter of time to design it.

"Whether its headphones, cell phones, watches or even your mouse and keyboard, a major irritation for consumers is the hassle of being tethered to cords to recharge batteries," said David Smith, professor at Duke.

Some wireless charging systems already exist to help power speakers, cell phones and tablets. The problem to date has been that the antennas in a wireless power transfer system would need to be able to focus on any device within a room.

The solution proposed by Smith and his colleagues relies on metamaterials -- a synthetic material composed of many individual, engineered cells that together produce properties not found in nature.

According to the results, a flat metamaterial device no bigger than a typical flat-screen television could focus beams of microwave energy down to a spot about the size of a cell phone within a distance of up to 10 meters.

It should also be capable of powering more than one device at the same time. Smith has used this principle to create the world's first cloaking device that bends electromagnetic waves around an object held within.

To achieve this on a big scale, a powerful, low-cost electromagnetic energy source would need to be developed.

"I think building a system like this, which could be embedded in the ceiling and wirelessly charge everything in a room, is a very feasible scheme," Smith noted.