The wireless power transmission is a system for providing wireless charging and/or primary power to electronic/electrical devices via microwave energy. The microwave energy is focused onto a device to be charged by a power transmitter having one or more adaptively-phased microwave array emitters. Rectennas within the device to be charged receive and rectify the microwave energy and use it for battery charging and/or for primary power. A communications channel is opened between the wireless power source and the device to be charged. The device to be charged reports to the power source via the channel a received beam signal strength at the rectennas. This information is used by the system to adjust the transmitting phases of the microwave array emitters until a maximum microwave energy is reported by the device to be charged. Backscatter is minimized by physically configuring the microwave array emitters in a substantially non-uniform, non-coplanar manner.

Title
Wireless power transmission system
Application Number
11/812060
Publication Number
20080309452
Application Date
June 14, 2007
Publication Date
December 18, 2008
Inventor
Hatem Zeine
Redmond
WA, US
Agent
Litman Law Offices
VA, US
IPC
H02J 17/00
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