MIT develops model for wireless power
A Massachusetts Institute of Technology team says it has used the physics of electromagnetic fields to propose a theoretical net that could wirelessly power electronic gadgets at distances of many feet.
Other wireless power systems include Nikola Tesla's long-range wireless energy experiment, the Wardenclyffe Tower (which ended when he ran out of funding); directional energy transfer such as lasers; and induction-based energy transfer systems such as the charger for electric toothbrushes. MIT's team hopes to improve upon these existing systems with their own solution, a type of longer-range induction, based on the resonance of an electromagnetic field. Outside of smaller applications, such as charging your toothbrush, this is something typically used in radio antennas. However, a radio antenna is inefficient for transferring energy because it broadcasts radio waves in all directions regardless of other devices—a waste of energy if used for powering devices wirelessly.
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