REVERSE LINK SIGNALING VIA RECEIVE ANTENNA IMPEDANCE MODULATION
First Claim
1. A wireless power transmitter, comprising:
- a transmit antenna configured to generate a magnetic field for coupling charging power in a near-field of the magnetic field to a receive antenna to charge a load of a receiver device electrically coupled to the receive antenna;
an amplifier configured to receive a power signal from a power supply, the amplifier configured to apply a first signal to the transmit antenna; and
a load sensing circuit operably coupled to the amplifier and configured to detect a change in the power signal supplied to the amplifier,wherein the load sensing circuit is configured to generate a receive signal responsive to the change in the power signal, andwherein the receive signal is indicative of a data communication from the receiver device communicated via the magnetic field.
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.
17 Citations
20 Claims
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1. A wireless power transmitter, comprising:
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a transmit antenna configured to generate a magnetic field for coupling charging power in a near-field of the magnetic field to a receive antenna to charge a load of a receiver device electrically coupled to the receive antenna; an amplifier configured to receive a power signal from a power supply, the amplifier configured to apply a first signal to the transmit antenna; and a load sensing circuit operably coupled to the amplifier and configured to detect a change in the power signal supplied to the amplifier, wherein the load sensing circuit is configured to generate a receive signal responsive to the change in the power signal, and wherein the receive signal is indicative of a data communication from the receiver device communicated via the magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of wireless power transmission comprising:
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generating, with a transmit antenna, a magnetic field for coupling charging power in a near-field of the magnetic field to a receive antenna electrically coupled to a receiver device; supplying a power signal to an amplifier; applying a first signal to the transmit antenna via the amplifier; detecting a change in the power signal supplied to the amplifier; generating a receive signal responsive to the change in the power signal; and identifying, from the receive signal, a data communication from the receiver device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A wireless power transmitter comprising:
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means for generating a magnetic field for coupling a charging power in a near-field of the magnetic field to a receive antenna electrically coupled to a receiver device; means for applying a first signal to the means for generating the magnetic field; means for supplying a power signal to the means for applying the first signal; means for detecting a change in the power signal; means for generating a receive signal responsive to the change in the power signal; and means for identifying, from the receive signal, a data communication from the receiver device. - View Dependent Claims (19, 20)
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Specification