A
system for providing
wireless, charging power and / or primary power to electronic /
electrical devices is described whereby
microwave energy is employed.
Microwave energy is focused by a power
transmitter comprising one or more adaptively-phased
microwave array emitters onto a device to be charged. 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 locator
signal generated by the device to be charged is analyzed by the
system to determine the location of the device to be charged relative to the microwave array emitters, permitting the microwave energy to be directly specifically towards the device to be charged.
Backscatter detectors respond to
backscatter energy reflected off of any obstacle between the device to be charged and the microwave array emitters. Power to any obstructed microwave array emitter is reduced until the obstruction is removed. Optionally, data can be modulated onto microwave energy beams produced by the array emitters and demodulated by the device, thereby providing means of data communication from the power
transmitter to the device. Similarly, data can be modulated onto the locator
signal and demodulated in the power
transmitter, thereby providing means of data communication from the device to the power transmitter.