Adaptive matching and tuning of HF wireless power transmit antenna
First Claim
Patent Images
1. A transmitter system for wireless power, comprising:
- an antenna resonant at a first frequency; and
a coupling loop assembly comprising;
a first coupling loop;
a first switch configured to activate said first coupling loop;
a second coupling loop; and
a second switch configured to activate said second coupling loop, the coupling loop assembly configured to couple with said antenna via magnetic induction.
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Abstract
Exemplary embodiments of the invention s are directed to a wireless power system with different coupling loops, such as two loops. The coupling loops are switched. One can be used for vicinity coupling, e.g., greater than a distance away, the other for proximity coupling, e.g., less than a distance away.
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Citations
52 Claims
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1. A transmitter system for wireless power, comprising:
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an antenna resonant at a first frequency; and a coupling loop assembly comprising; a first coupling loop; a first switch configured to activate said first coupling loop; a second coupling loop; and a second switch configured to activate said second coupling loop, the coupling loop assembly configured to couple with said antenna via magnetic induction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A receiver system for wireless power, comprising:
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a circuit configured to receive a signal at a first frequency and to produce an electrical output based on said first frequency; an antenna resonant at said first frequency; and a coupling loop assembly comprising; a first coupling loop; a first switch configured to activate said first coupling loop; a second coupling loop; and a second switch configured to activate said second coupling loop. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An antenna, comprising:
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multiple loops forming an inductive part; a capacitor, in series with said multiple loops; and a mover, configured to move said multiple loops relative to one another, changing a resonance frequency of said antenna. - View Dependent Claims (25, 26, 27)
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28. A method of coupling electric power, comprising:
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adjusting a coupling loop to transfer power via a first field upon detecting wireless power transfer via the first field between a pair of devices separated by less than a distance; and adjusting the coupling loop to transfer power via a second field upon detecting wireless power transfer via the second field between the pair of devices separated by more than the distance. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A system comprising:
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means, resonant at a first frequency, for transmitting or receiving wireless power; and means for coupling wireless power to and from said means for transmitting or receiving, said coupling means including; means for a first coupling of wireless power to said means for transmitting or receiving; means for activating said first coupling means; means for a second coupling of wireless power to said means for transmitting or receiving wireless power; and means for activating said second coupling means. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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42. An antenna comprising:
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means for producing inductive coupling; means for adjusting a capacitance coupled in series with said means for producing inductive coupling; and means for moving said means for inductive coupling, the means for moving configured to adjust a resonant frequency of the antenna based on a position of said means for producing inductive coupling.
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43. A method of transmitting wireless power comprising:
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detecting coupling to an antenna; selecting a coupling loop based on said detected coupling; and transferring wireless power from said coupling loop to said antenna via magnetic induction. - View Dependent Claims (44, 45, 46, 47)
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48. A method of receiving wireless power comprising:
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detecting coupling to an antenna; selecting a coupling loop based on the detected coupling; receiving wireless power from the coupling loop at said antenna via magnetic induction; and producing an electrical output based on said received wireless power. - View Dependent Claims (49, 50, 51, 52)
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Specification