Repeaters for enhancement of wireless power transfer
First Claim
1. An apparatus for transferring power wirelessly, comprising:
- a transmit antenna configured to generate a first electromagnetic field within a first coverage area; and
a repeater antenna comprising a loop antenna and a capacitive element, the repeater antenna, when located within the first coverage area, configured to receive power within the first electromagnetic field and to generate a second electromagnetic field within a second coverage area different from the first coverage area, the second electromagnetic field comprising an improved electromagnetic field when compared to the first electromagnetic field.
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Accused Products
Abstract
Exemplary embodiments are directed to wireless power transfer. A wireless power transfer system include a transmit circuit with a transmit antenna driven from a power amplifier to generate a near field radiation at a resonant frequency within a first coupling mode region surrounding the transmit antenna. One or more repeater antennas are disposed at different locations within the first coupling mode region. Each repeater antenna generates an enhanced near field radiation at the resonant frequency within a coupling mode region corresponding to that repeater antenna. One or more receive circuits including a receive antenna receive power when they are disposed in one of the coupling mode regions corresponding to that repeater antenna.
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Citations
46 Claims
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1. An apparatus for transferring power wirelessly, comprising:
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a transmit antenna configured to generate a first electromagnetic field within a first coverage area; and a repeater antenna comprising a loop antenna and a capacitive element, the repeater antenna, when located within the first coverage area, configured to receive power within the first electromagnetic field and to generate a second electromagnetic field within a second coverage area different from the first coverage area, the second electromagnetic field comprising an improved electromagnetic field when compared to the first electromagnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless power transfer system, comprising:
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a transmit antenna configured to generate, in response to a signal from an amplifier, a first electromagnetic field within a first region, the first electromagnetic field being at a resonant frequency; and a repeater antenna configured to generate, when located within the first region, a second electromagnetic field within a second region, the second electromagnetic field being at the resonant frequency and comprising an enhanced electromagnetic field when compared to the first electromagnetic field, the transmit antenna and the repeater antenna being configured to transfer power wirelessly to a receive antenna configured to receive power stored in at least one of the first electromagnetic field and the second electromagnetic field when the receive antenna is located within the second region. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A wireless charging method, comprising:
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generating, in a first region, a first electromagnetic field at a resonant frequency; generating, in a second region located within the first region, a second electromagnetic field at the resonant frequency, the second electromagnetic field comprising an enhanced electromagnetic field when compared to the first electromagnetic field; and transmitting power stored in at least one of the first electromagnetic field and the second electromagnetic field to a receive antenna located within the second region. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A wireless power transfer system, comprising:
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a transmit antenna configured to, in response to a signal from an amplifier, generate a first electromagnetic field within a first region, the first electromagnetic field being at a resonant frequency; and a plurality of repeater antennas, each repeater antenna in the plurality located within the first region and configured to generate a second electromagnetic field within a corresponding region, the second electromagnetic field being at the resonant frequency and comprising an enhanced electromagnetic field when compared to the first electromagnetic field, at least one of the plurality of repeater antennas being configured to transfer power wirelessly to a plurality of receive antennas, each receive antenna configured to receive power stored in an electromagnetic field generated by at least one of the plurality of repeater antennas. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35)
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36. An apparatus for transferring power wirelessly, comprising:
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means for generating, in a first region, a first electromagnetic field at a resonant frequency; means for generating, in a second region located within the first region, a second electromagnetic field at the resonant frequency, the second electromagnetic field comprising an enhanced electromagnetic field when compared to the first electromagnetic field; and means for transmitting power stored in at least one of the first electromagnetic field and the second electromagnetic field to a receive antenna located within the second region. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification