Wireless POWER - 無線"電"

Wireless POWERA professor suggest to use "resonance" to transfer energy , thant means you can dump you appliance power cord. The major problem they need to slove is how to transmit the energy in one direction other then scatteeing. It can transmit power aorund 5 m.

HOW WIRELESS POWER COULD WORK

1) Power from mains to antenna, which is made of copper
2) Antenna resonates at a frequency of 6.4Mhz, emitting electromagnetic waves
3) 'Tails' of energy from antenna 'tunnel' up to 5m (16.4ft)
4) Electricity picked up by laptop's antenna, which must also be resonating at 6.4Mhz. Energy used to re-charge device
5) Energy not transferred to laptop re-absorbed by source antenna. People/other objects not affected as not resonating at 6.4Mhz

http://news.bbc.co.uk/2/hi/technology/6129460.stm