REVERSE LINK SIGNALING VIA RECEIVE ANTENNA IMPEDANCE MODULATION
First Claim
1. A wireless power receiver, comprising:
- a receive antenna for coupling with a transmit antenna through a near-field radiation generated by the transmit antenna to generate an RF signal; and
a switching circuit operably coupled to the receive antenna and for cloaking the receive antenna from coupling with the near-field radiation when the switching circuit is in a first state and enabling the receive antenna to couple with the transmit antenna when the switching circuit is in a second state.
1 Assignment
0 Petitions
Accused Products
Abstract
Exemplary embodiments are directed to wireless power transfer including generating an electromagnetic field at a resonant frequency of a transmit antenna to create a coupling-mode region within a near-field of the transmit antenna. A receive antenna placed within the coupling-mode region resonates at or near the resonant frequency. The receive antenna extracts energy from a coupling between the two antennas. Signaling from the receive antenna to the transmit antenna is performed by generating a first power consumption state for the receive antenna to signal a first receive signal state and generating a second power consumption state for the receive antenna to signal a second receive signal state. Signaling from the transmit antenna to the receive antenna is performed by enabling the resonant frequency on the transmit antenna to signal a first transmit signal state and disabling the resonant frequency on the transmit antenna to signal a second transmit signal state.
448 Citations
27 Claims
-
1. A wireless power receiver, comprising:
-
a receive antenna for coupling with a transmit antenna through a near-field radiation generated by the transmit antenna to generate an RF signal; and a switching circuit operably coupled to the receive antenna and for cloaking the receive antenna from coupling with the near-field radiation when the switching circuit is in a first state and enabling the receive antenna to couple with the transmit antenna when the switching circuit is in a second state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A wireless power receiver, comprising:
-
a receive antenna for coupling with a transmit antenna through a near-field radiation generated by the transmit antenna to generate an RF signal; a rectifier operably coupled to the receive antenna and for converting the RF signal to a DC signal for supplying power to a receive device; and a signal extractor operably coupled to the receive antenna and for detecting an on/off keying modulation of the RF signal to extract a transmitted digital signal responsive to the on/off keying modulation. - View Dependent Claims (12, 13, 14)
-
-
15. A wireless power transmitter, comprising:
-
a transmit antenna for generating a near-field radiation for coupling to a receive antenna; an amplifier with a power signal for supplying power to the amplifier, the amplifier for applying an RF signal to the transmit antenna; and a load sensing circuit operably coupled to the amplifier and for detecting a change in current through the power signal, wherein the load sensing circuit generates a digital signal responsive to the change in current. - View Dependent Claims (16, 17, 18, 19)
-
-
20. A method of wireless power transfer, comprising:
-
generating an electromagnetic field at a resonant frequency of a transmit antenna to create a coupling-mode region within a near-field of the transmit antenna; disposing a receive antenna within the coupling-mode region, wherein the receive antenna resonates substantially near the resonant frequency; extracting energy from a coupling of the receive antenna to the near-field of the transmit antenna; and signaling from the receive antenna to the transmit antenna by; generating a first power consumption state for the receive antenna to signal a first receive signal state; and generating a second power consumption state for the receive antenna to signal a second receive signal state. - View Dependent Claims (21, 22, 23)
-
-
24. A wireless power transfer system, comprising:
-
means for generating an electromagnetic field at a resonant frequency of a transmit antenna to create a coupling-mode region within a near-field of the transmit antenna; means for receiving the resonant frequency within the coupling-mode region with a receive antenna, wherein the receive antenna resonates substantially near the resonant frequency; means for extracting energy from a coupling of the receive antenna to the near-field of the transmit antenna; and means for signaling from the receive antenna to the transmit antenna by; generating a first power consumption state for the receive antenna to signal a first receive signal state; and generating a second power consumption state for the receive antenna to signal a second receive signal state. - View Dependent Claims (25, 26, 27)
-
Specification