Wireless power transmission system

• US 10,897,161 B2
• Filed: 02/14/2020
• Issued: 01/19/2021
• Est. Priority Date: 06/14/2007
• Status: Active Grant

• Current Assignee: Ossia, Inc.
• Original Assignee: Ossia, Inc.
• Inventors: Zeine, Hatem
• Primary Examiner(s): Syed, Nabil H
• Assistant Examiner(s): Eustaquio, Cal J
• Application Number:
  US16/791,765
• Publication Number:
  US 20200185972A1
• Time in Patent Office: 340 Days
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/23 characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• CPC Class Codes: H02J 50/27 characterised by the type of receiving antennas, e.g. rectennas
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage

Abstract

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 to a location 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.

Claims

1. A wireless microwave motion detector, comprising:

at least one sensor configured to detect motion;

one or more rectennas configured to receive power transmission signals from a wireless microwave power transmitter to charge the wireless microwave power receiver; and

a control logic configured to receive a signal from the at least one sensor;

wherein the signal contains information,

wherein the control logic is further configured to send the information to a controller for further action by the controller,

wherein the wireless microwave power transmitter comprising;

the 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 detect a phase at which each of the multipath calibration signals is received by the transceiver;

a transmitter configured to transmit said multipath calibration signals to said microwave power transmitter; and

,

wherein each rectenna is further configured to receive a power transmission signal having a determined phase, the determined phase of the power transmission signal generated under the control of the controller at the microwave power transmitter being substantially a complex conjugate of a detected phase of the calibration signal; and

wherein the microwave power transmitter and wireless microwave power receiver are not required to be in line of sight of each other; and

wherein the controller is further configured to determine a prioritization order for transmission of the power transmission signals to the wireless microwave power receiver based upon a predefined criteria.

2. The wireless microwave motion detector according to claim 1, wherein

the controller is further configured to stop the power transmission signal from being sent to each rectenna.

3. The wireless microwave motion detector according to claim 1, wherein

the controller is further configured to reduce an amount of the power transmission signal being sent to each rectenna.

4. The wireless microwave motion detector according to claim 1, wherein the at least one sensor is an accelerometer.

5. A wireless microwave power transmitter comprising:

a controller and a phased array antenna having a plurality of microwave array transceivers each for transmitting a microwave power transmission signal, the transceivers being adaptively-phased by the controller to transmit their respective power transmission signals at a respective selected phase;

each transceiver further operable to receive multipath calibration signals from a plurality of devices to be charged by the microwave power transmission signals and detect a phase at which each of the multipath calibration signals is received by the respective transceiver;

the controller further configured to adjust the respective selected phase for use in transmitting the respective power transmission signal to a respective determined phase, the respective determined phase based on the respective detected phase wherein the respective determined phase indicates an optimal phase for the power transmission signal to be transmitted to each device of the plurality of devices to be charged; and

wherein each power transmission signal is transmitted without utilizing a location signal, if any, from the plurality of devices to be charged that indicates the location of each device to be charged of the plurality of devices to be charged, and

wherein the microwave transmitter and the plurality of devices to be charged are not required to be in line of sight of each other, and

wherein the controller is further configured to prioritize transmission of the power transmission signals to a first device to be charged of the plurality of devices to be charged prior to transmitting the power transmission signals to a second device of the plurality of devices to be charged based upon a predefined criteria; and

wherein the controller is further configured to receive motion detection information from at least one of the plurality of devices to be charged.

6. The wireless microwave power transmitter according to claim 5,

wherein the controller is further configured to stop the transmission of each power transmission signal when the motion detection information is received.

7. The wireless microwave power transmitter according to claim 5,

wherein the controller is further configured to reduce an amount of each power transmission signal when the motion detection information is received.