OUT-OF-BAND COMMUNICATION ON HARMONICS OF THE PRIMARY CARRIER IN A WIRELESS POWER SYSTEM

• US 20120155344A1
• Filed: 08/18/2011
• Published: 06/21/2012
• Est. Priority Date: 12/16/2010
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Wiley, George A., Low, Zhen Ning
• Application Number:
  US13/213,005
• Publication Number:
  US 20120155344A1
• Time in Patent Office: Days
• US Class Current: 370/310
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/70 specially adapted for specific purposes
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/73 for taking measurements, e.g. using sensing coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Exemplary embodiments are directed to communication with a wireless power transmitter. A device may include an antenna for wirelessly transmitting a power carrier. The device may further include transmit circuitry coupled to the antenna and configured to transmit a data carrier at a frequency corresponding to at least one harmonic of the power carrier.

Claims

1. A device, comprising:

an antenna for wirelessly transmitting a power carrier; and

transmit circuitry coupled to the antenna and configured to transmit a data carrier at a frequency corresponding to at least one harmonic of the power carrier.

2. The device of claim 1, the transmit circuitry including a filter coupled to the antenna and configured to selectively modulate at least one harmonic of the power carrier.

3. The device of claim 2, the filter comprising:

an inductor;

a capacitor coupled to the inductor; and

a switching element coupled to the capacitor and for coupling the capacitor to a ground voltage.

4. The device of claim 1, the switching element comprising a field-effect transistor.

5. The device of claim 2, the filter comprising an LC filter configured to resonate at the at least one harmonic.

6. The device of claim 3, the transmit circuitry including a first amplifier for generating the power carrier and a second, different amplifier for generating the data carrier.

7. The device of claim 3, further comprising another antenna for transmitting the data carrier.

8. A device, comprising:

a first amplifier for generating a power carrier including a plurality of harmonics; and

circuitry; and

a second amplifier for generating a data carrier at a frequency associated with at least one harmonic of the plurality.

9. The device of claim 8, further comprising a combiner for combining the power carrier and the data carrier.

10. The device of claim 8, the first amplifier coupled to a first antenna for transmitting the power carrier and the second amplifier coupled to a second antenna for transmitting the data carrier.

11. A device, comprising:

an antenna for wirelessly receiving a power carrier; and

receive circuitry coupled to the antenna and configured to demodulate a data signal at a frequency associated with at least one harmonic of the power carrier.

12. The device of claim 11, the receive circuitry configured to use a fundamental frequency of the power carrier as a reference to demodulate the data signal.

13. The device of claim 11, the receive circuitry configured to isolate the data signal from the power carrier.

14. The device of claim 11, further comprising another antenna for receiving the data signal.

15. A method, comprising:

generating a wireless power carrier including a plurality of harmonics; and

transmitting a data carrier at a frequency associated with at least one harmonic of the wireless power carrier.

16. The method of claim 15, further comprising selectively modulating at least one harmonic of the plurality of harmonics.

17. The method of claim 16, the modulating comprising selectively filtering at least one of a second harmonic, a third harmonic, and a fourth harmonic of the plurality of harmonics.

18. The method of claim 17, the filtering comprising resonating a filter including a capacitor and an inductor at a frequency of the at least one harmonic of the signal.

19. The method of claim 15, the transmitting comprising transmitting the power carrier with a first antenna and transmitting the data carrier with a second, different antenna.

20. The method of claim 15, further comprising combining the power carrier and the data carrier prior to transmitting the data carrier.

21. A method, comprising:

wirelessly receiving a power carrier with an antenna; and

demodulating a data carrier at a frequency associated with at least one harmonic of the power carrier.

22. The method of claim 21, the demodulating comprising using the power carrier as a reference to demodulate the data carrier.

23. The method of claim 21, further comprising isolating the data carrier from the power carrier.

24. The method of claim 21, further comprising wirelessly receiving the data carrier with another, different antenna.

25. A device, comprising:

means for wirelessly receiving a power carrier with an antenna; and

means for demodulating a data carrier at a frequency associated with at least one harmonic of the power carrier.

26. A device, comprising:

means for generating a wireless power carrier including a plurality of harmonics; and

means for transmitting a data carrier at a frequency associated with at least one harmonic of the wireless power carrier.