Patent ID: 8072380
Filing Date: 2011-12-06
Classification: H01Q,H02J

Abstract:
1. A switched-beam wireless power transmission system, comprising: at least one electromagnetic radiation source; a plurality of wireless power receivers each collocated with a beacon that radiates a pilot signal when the beacon is in an active state; and an array of transmitting antennas that receives the pilot signal from the active beacon and radiates electromagnetic radiation from the at least one electromagnetic radiation source in the direction of the wireless power receiver collocated with the beacon in the active state, wherein the direction of the radiated electromagnetic radiation is switched among the wireless power receivers based upon which beacon is in an active state; wherein the wireless power receivers and the beacons are on a single object; wherein the beacons are successively activated to successively direct the electromagnetic radiation to different of the wireless power receivers on the single object; and wherein the transmitting antennas are retrodirective antennas that are steered at least in part electronically successively to the different of the wireless power receivers on the single object.