Enhanced transmitter that selects configurations of antenna elements for performing wireless power transmission and receiving functions

• US 9,825,674 B1
• Filed: 12/29/2014
• Issued: 11/21/2017
• Est. Priority Date: 05/23/2014
• Status: Active Grant

• Current Assignee: Energous Corporation
• Original Assignee: Energous Corporation
• Inventors: Leabman, Michael A.
• Primary Examiner(s): Fleming, Fritz M
• Application Number:
  US14/584,364
• Time in Patent Office: 1,058 Days
• Field of Search: 307104, 320108
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• 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 50/80 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

The embodiments described herein include a transmitter that transmits a power transmission signal (e.g., radio frequency (RF) signal waves) to create a three-dimensional pocket of energy. At least one receiver can be connected to or integrated into electronic devices and receive power from the pocket of energy. The transmitter can locate the at least one receiver in a three-dimensional space using a communication medium (e.g., Bluetooth technology). The transmitter generates a waveform to create a pocket of energy around each of the at least one receiver. The transmitter uses an algorithm to direct, focus, and control the waveform in three dimensions. The receiver can convert the transmission signals (e.g., RF signals) into electricity for powering an electronic device. Accordingly, the embodiments for wireless power transmission can allow powering and charging a plurality of electrical devices without wires.

Claims

1. An apparatus for controlling transmission of pocket-forming wireless RF signals suitable for charging devices, comprising:

a controller, coupled to a communication component, configured to communicate with a receiver via a communication signal indicating a location of the receiver;

one or more receiving circuits coupled to the controller, each receiving circuit configured to receive and sample one or more incoming RF signals from the receiver;

a plurality of transmitting circuits operatively coupled to the controller, each transmitting circuit configured to generate one or more outgoing RF signals based upon the one or more incoming RF signals sampled at the one or more receiving circuits; and

an antenna array comprising a plurality of antenna elements within a housing, the plurality of antenna elements including at least some dedicated antenna elements,

wherein the controller is configured to;

(i) select a first configuration of at least some of the dedicated antenna elements to be coupled to the one or more receiving circuits, and

(ii) select, based on the location of the receiver, a second configuration, distinct from the first configuration, of at least some of the plurality of antenna elements to be coupled to the plurality of transmitting circuits to transmit the one or more outgoing RF signals, the one or more outgoing RF signals converging and forming controlled constructive interference at the location of the receiver.

2. The apparatus of claim 1, wherein the controller is configured to control operation of the plurality of transmitting circuits so as to concentrate transmission of the outgoing RF signals from the second configuration of the at least some of the plurality of antenna elements.

3. The apparatus of claim 2, wherein the second configuration of the at least some of the plurality of antenna elements is configured to concentrate transmission of the outgoing RF signals so that the outgoing RF signals converge in 3-dimensional space to form the controlled constructive interference in a 3-dimensional shape at the location of the receiver.

4. The apparatus of claim 1, wherein the controller is selected from the group consisting of:

a microcontroller, a digital signal processor and an ARM microprocessor.

5. The apparatus of claim 1, wherein the plurality of antenna elements comprises patch antennas.

6. The apparatus of claim 1, wherein the communications component is configured to receive information for processing by the controller to optimize a time and one or more locations for transmitting the outgoing RF signals.

7. An apparatus for controlling transmission of wireless RF signals suitable for charging devices, comprising:

an antenna array comprising a plurality of antenna elements within a housing, the plurality of antenna elements including at least some dedicated antenna elements; and

a controller, operatively coupled to a plurality of transmitting circuits, wherein the controller is configured to;

(i) send switching signals to a receiving circuit to select a first configuration of at least some of the dedicated antenna elements to be coupled to the receiving circuit to receive incoming RF signals, wherein the controller is coupled to a communications component configured to communicate with a receiver via a communication signal indicating a location associated with the receiver,

(ii) process the incoming RF signals, and

(iii) select, based on the location associated with the receiver, a second configuration, distinct from the first configuration, of at least some of the plurality of antenna elements to be coupled to the plurality of the transmitting circuits to generate outgoing RF signals for forming controlled constructive interference at the location associated with the receiver based on the processing.

8. The apparatus of claim 7, wherein the first configuration of at least some of the dedicated antenna elements comprises at least one of a row or a column of the dedicated antenna elements in the antenna array.

9. The apparatus of claim 7, wherein the controller is configured to control operation of the plurality of transmitting circuits so as to concentrate transmission of the outgoing RF signals from the second configuration of the at least some of the plurality of antenna elements.

10. The apparatus of claim 9, wherein the second configuration of the at least some of the plurality of antenna elements is configured to concentrate transmission of the outgoing RF signals so that the outgoing RF signals converge in 3-dimensional space to form the controlled constructive interference in a 3-dimensional shape at the location associated with the receiver.

11. The apparatus of claim 7, wherein the controller is selected from the group consisting of:

a microcontroller, a digital signal processor, and an ARM microprocessor.

12. The apparatus of claim 7, wherein the plurality of antenna elements comprises patch antennas.

13. The apparatus of claim 7, wherein the communications component is configured to receive information for processing by the controller to optimize a time and one or more locations for transmitting the outgoing RF signals.

14. A transmitter for controlling transmission of wireless RF signals suitable for charging devices, comprising:

a controller;

a plurality of transmitting circuits operatively coupled to the controller; and

an antenna array comprising a plurality of antenna elements within a housing, the plurality of antenna elements including at least some dedicated antenna elements,

wherein the controller is coupled to a communication component configured to communicate with a receiver via a communications signal indicating a location associated with the receiver and the controller is configured to;

(i) select a first configuration of at least some of the dedicated antenna elements to be coupled to the one or more receiving circuits, and

(ii) select, based on the location associated with the receiver, a second configuration, distinct from the first configuration, of at least some of the plurality of antenna elements to be coupled to the plurality of transmitting circuits to generate outgoing RF signals for forming controlled constructive interference at the location associated with the receiver.

15. The transmitter of claim 14, wherein the controller is further configured to generate at least two outgoing RF signals and adjust phase shifts and gains of the at least two outgoing RF signals so as to generate constructive interference patterns of the outgoing RF signals.

16. A method of controlling transmission of wireless RF signals suitable for charging devices, the method comprising:

at a transmitter that includes a controller, a plurality of transmitting circuits coupled to the controller, one or more receiving circuits coupled to the controller, a communication component coupled to the controller, and an antenna array comprising a plurality of antenna elements within a housing, the plurality of antenna elements including at least some dedicated antenna elements;

receiving, by the communication component and from a receiver, a communication signal that indicates a location associated with the receiver;

selecting, by the controller, a first configuration of at least some of the dedicated antenna elements to be coupled to the one or more receiving circuits; and

selecting, based on the location associated with the receiver, a second configuration, distinct from the first configuration, of at least some of the plurality of antenna elements to be coupled to the plurality of transmitting circuits; and

generating, by the plurality of transmitting circuits, outgoing RF signals for transmission by the second configuration of at least some of the plurality of antenna elements to form controlled constructive interference at the location associated with the receiver.

17. The method of claim 16, wherein the dedicated antenna elements are dedicated for use by the one or more receiving circuits to receive one or more incoming RF signals.

18. The method of claim 17, further comprising, sampling, at the one or more receiving circuits, the one or more incoming RF signals.

19. The method of claim 18, wherein the outgoing RF signals are based on the one or more incoming RF signals sampled at the one or more receiving circuits.

20. The method of claim 16, wherein selecting the first and second configurations comprises sending switching signals to the one or more receiving circuits and the plurality of transmitting circuits, respectively.