Repeaters for enhancement of wireless power transfer
First Claim
1. An apparatus for transferring power wirelessly, comprising:
- a transmit antenna of a first size configured to generate a first electromagnetic field; and
a repeater antenna of a second size comprising a loop antenna and a capacitive element, the second size being smaller than the first size, the repeater antenna located within a perimeter of the transmit antenna, the repeater antenna configured to receive power within the first electromagnetic field and to generate a second electromagnetic field, the second electromagnetic field comprising an improved electromagnetic field at least within an area defined by dimensions of the repeater antenna when compared to the first electromagnetic field within the area defined by dimensions of the repeater antenna.
1 Assignment
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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
20 Claims
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1. An apparatus for transferring power wirelessly, comprising:
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a transmit antenna of a first size configured to generate a first electromagnetic field; and a repeater antenna of a second size comprising a loop antenna and a capacitive element, the second size being smaller than the first size, the repeater antenna located within a perimeter of the transmit antenna, the repeater antenna configured to receive power within the first electromagnetic field and to generate a second electromagnetic field, the second electromagnetic field comprising an improved electromagnetic field at least within an area defined by dimensions of the repeater antenna when compared to the first electromagnetic field within the area defined by dimensions of the repeater antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless charging method, comprising:
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generating, by a transmit antenna of a first size, a first electromagnetic field at a resonant frequency; and generating, by a repeater antenna of a second size located within a perimeter of the transmit antenna, a second electromagnetic field at the resonant frequency, the second size being smaller than the first size, the second electromagnetic field comprising an improved electromagnetic field at least within an area defined by dimensions of the repeater antenna when compared to the first electromagnetic field within the area defined by dimensions of the repeater antenna. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A wireless power transfer system, comprising:
a repeater antenna of a first size configured to receive power via a first electromagnetic field generated by a transmit antenna of a second size, the first size being smaller than the second size, the repeater antenna configured to generate a second electromagnetic field, the second electromagnetic field comprising an improved electromagnetic field at least within an area defined by dimensions of the repeater antenna when compared to the first electromagnetic field within the area defined by dimensions of the repeater antenna. - View Dependent Claims (16, 17, 18, 19, 20)
Specification