Wireless power transmission system

Patent metadata

Field	Value
Publication number	US-2016013685-A1
Application number	US-201514859909-A
Country	US
Kind code	A1
Filing date	Sep 21, 2015
Priority date	Jun 14, 2007
Publication date	Jan 14, 2016
Grant date	—

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.

First claim

What is claimed is:

1 . A wireless power transmitter comprising:
a controller and a phased array antenna having at least one electro-magnetic array transceiver for transmitting an electro-magnetic power transmission signal; wherein the controller further configured to: detect a presence of a plurality of mobile receivers; transmit a first electro-magnetic power transmission signal to the plurality of mobile receivers at a first frequency; receive a first indication of a power level of the first electro-magnetic power transmission signal from a first mobile receiver; determine a second frequency based upon the received first indication of the power level; transmit a second electro-magnetic power transmission signal to the first mobile receiver at the second frequency; receive a second indication of a power level of the first electro-magnetic power transmission signal from a second mobile receiver; determine a third frequency based upon the received second indication of the power level, wherein the second frequency and the third frequency are different; and transmit a third electro-magnetic power transmission signal to the second mobile receiver at the third frequency.

2 . The wireless power transmitter of claim 1 wherein the second electro-magnetic power transmission signal and the third electro-magnetic power transmission signal are transmitted concurrently.

3 . The wireless power transmitter of claim 1 wherein the controller is further configured to stop transmitting the second electro-magnetic power transmission signal prior to transmitting the third electro-magnetic power transmission signal.

4 . The wireless power transmitter of claim 1 , wherein the phased array antenna includes array antennae that are arranged in a non-planar form.

5 . The wireless power transmitter of claim 1 wherein the controller is further configured to select the first mobile receiver based upon a prioritization of the plurality of mobile receivers.

6 . The wireless power transmitter of claim 1 , wherein the electro-magnetic power transmission signal is a microwave.

7 . A wireless power receiver comprising:
a rectifier configured to receive an electro-magnetic power transmission signal from a wireless power transmitter and feed a received electro-magnetic power transmission signal to a power meter; wherein the power meter is configured to measures a power signal strength indication of the received electro-magnetic power transmission signal and provide a control logic with the power signal strength indication; wherein the control logic is configured to receive the power signal strength indication and transmit the power signal strength indication to the wireless power transmitter; and wherein the wireless power transmitter is configured to: detect a presence of the wireless power receiver; transmit the electro-magnetic power transmission signal to the wireless power receiver at a first frequency; receive the indication of a power level from the wireless power receiver; determine a second frequency based upon the received power signal strength indication; transmit a second electro-magnetic power transmission signal to the power receiver at the second frequency; receive a second power signal strength indication based on the second electro-magnetic power transmission signal from the wireless power receiver.

8 . The wireless power receiver comprising of claim 7 , wherein the electro-magnetic power transmission signal is a microwave.

9 . The wireless power receiver comprising of claim 7 , wherein the transmitter is further configured to determine a prioritization of the wireless power receiver.

10 . The wireless power receiver comprising of claim 7 , wherein the receiver is further configured to charge an internal battery with energy from the second electro-magnetic power transmission signal.

11 . The wireless power receiver comprising of claim 7 , wherein the receiver is further configured to power internal circuitry with energy from the second electro-magnetic power transmission signal.

12 . A method for receiving power and data communication wirelessly from a wireless power transmitter comprising:
detecting, by the wireless power transmitter, a presence of a plurality of mobile receivers; transmitting, by the wireless power transmitter, a first electro-magnetic power transmission signal to the plurality of mobile receivers at a first frequency; receiving, by the wireless power transmitter, a first indication of a power level of the first electro-magnetic power transmission signal from a first mobile receiver; determining, by the wireless power transmitter, a second frequency based upon the received first indication of the power level; transmitting, by the wireless power transmitter, a second electro-magnetic power transmission signal to the first mobile receiver at the second frequency; receiving, by the wireless power transmitter, a second indication of a power level of the first electro-magnetic power transmission signal from a second mobile receiver; determining, by the wireless power transmitter, a third frequency based upon the received second indication of the power level, wherein the second frequency and the third frequency are different; and transmitting, by the wireless power transmitter, a third electro-magnetic power transmission signal to the second mobile receiver at the third frequency.

13 . The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 12 , wherein the second electro-magnetic power transmission signal and the third electro-magnetic power transmission signal are transmitted concurrently.

14 . The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 12 , further comprising
stopping, by the wireless power transmitter, the transmission of the second electro-magnetic power transmission signal prior to transmitting the third electro-magnetic power transmission signal.

15 . The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 12 , wherein the wireless power transmitter includes array antennae that are arranged in a non-planar form.

16 . The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 12 , further comprising:
selecting, by the wireless power transmitter, the first mobile receiver based upon a prioritization of the plurality of mobile receivers.

17 . The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 12 , wherein the electro-magnetic power transmission signal is a microwave.

18 . The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 12 , further comprising:
charging, by the first mobile receiver, an internal battery of the first mobile receiver with energy from the second electro-magnetic power transmission signal.

19 . The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 18 , further comprising:
charging, by the second mobile receiver, an internal battery of the second mobile receiver with energy from the third electro-magnetic power transmission signal.

20 . The method for receiving power and data communication wirelessly from a wireless power transmitter of claim 12 , further comprising:
powering, by the first mobile receiver, internal circuitry of the first mobil

Assignees

• Ossia Inc

Inventors

• Zeine Hatem

Classifications

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J50/23 Primary

  characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas · CPC title

• H02J50/40

  using two or more transmitting or receiving devices (H02J50/50 takes precedence) · CPC title

• H02J50/90

  involving detection or optimisation of position, e.g. alignment · CPC title