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 Wireless Transfer of Power?

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PostSubject: Wireless Transfer of Power?   16/11/06, 06:53 pm

According to reports, researchers from the Massachusetts Institute of Technology (MIT) are claiming to develop a wireless power transfer device, which would enable wireless charging of electronic devices like mobile phones, MP3 players, laptops, and more.

The researchers at MIT claim that the concept behind the device is derived from century-old Physics, and that the device will be able to transfer energy over three to five meters wirelessly.

Reportedly, the device exploits the resonance of electromagnetic waves, which includes radio waves, infrared, and X-rays.

Marin Soljacic, a physicist at MIT, said that the system uses an electromagnetic field to transfer energy from a source of power to a device several meters away. The technique takes care of concerns about safety and security that have dogged similar efforts in the past.

Usually, those systems using electromagnetic radiation scatter energy in all directions, emanating large amounts of it into free space, thus proving to be unsuitable for efficient energy transfer.

With the intention to overcome the problem, the team investigated a special class of "nonradiative resonant energy transfer," a technique that harnesses omni-directional energy beacons, eliminating the requirement for unobstructed line-of-sight.

According to MIT, the technique is similar to the mechanism that enables a cell phone's resonant antenna to receive calls to a specific phone number.

In other words, it is a lock-and-key mechanism in which the transmitter and receiver are both tuned to the same MHz-range frequency that enables energy to be transferred only to the target.

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