Improved wireless power transmission possible

U.S. engineering boffins have discovered a new method that could hugely improve the transmission of electrical power without wires. The new method would allow not only low-consumption devices, such as laptops and phones to be charged wirelessly. More powerful devices, such as cars would benefit from wireless charging, as well.

"We currently have the ability to transmit small amounts of power over short distances, such as in radio frequency identification (RFID) devices," says Yaroslav Urzhumov, electrical and computer engineering prof at Duke. "However, larger amounts of energy, such as that seen in lasers or microwaves, would burn up anything in its path."

According to Urzhumov, one possible solution is to use the new artificial "metamaterials", because of their potential ability to bend radar beams and/or light rays to create "invisibility cloaks".

"Based on our calculations, it should be possible to use these novel metamaterials to increase the amount of power transmitted without the negative effects," says the prof. "The system would need to be tailored to the specific recipient device, in essence the source and target would need to be 'tuned' to each other."

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