Patent ID: 8854176
Filing Date: 2014-10-07
Classification: H02J

Abstract:
1. A rechargeable battery, comprising: circuitry configured to receive power transmission signals from a wireless microwave power transmitter to charge the rechargeable battery; wherein the wireless microwave power transmitter comprises: a controller and a phased array antenna having a plurality of microwave array transceivers for transmitting the microwave power transmission signals, the transceiver being adaptively-phased by the controller to transmit the power transmission signals at a respective selected phase; each transceiver further operable to receive multipath calibration signals from the microwave power receiver and each said transceiver operable to detect a phase at which each of the multipath calibration signals is received by the respective transceiver; a transmitter configured to transmit said multipath calibration signals to said microwave power transmitter; and, wherein the circuitry is further configured to receive the power transmission signal having a detected phase, the detected phase of the power transmission signal generated under the control of the controller at the microwave power transmitter being substantially a complex conjugate of the detected phase of the multipath calibration signal; and wherein the microwave power transmitter and rechargeable battery are not required to be in line of sight of each other.