Near field transmitters for wireless power charging of an electronic device by leaking RF energy through an aperture
First Claim
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1. A near-field transmitter comprising:
- a plurality of unit cells configured to receive one or more radio frequency (RF) signals, each unit cell in the plurality of unit cells including;
a metal layer having an interior perimeter that surrounds an aperture defined by the metal layer; and
a patch antenna positioned within the aperture, wherein a perimeter of the patch antenna has a separation from the interior perimeter of the metal layer, the patch antenna being configured to;
(i) receive one of the one or more RF signals, the received RF signal having a frequency based on the separation between the perimeter of the patch antenna and the interior perimeter of the metal layer, and(ii) radiate the received RF signal as an RF energy signal for charging an electronic device,wherein the RF energy signal is leaked at least in part through the separation between the perimeter of the patch antenna and the interior perimeter of the metal layer only when an antenna of the electronic device is positioned in a near-field distance from the unit cell.
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Abstract
Disclosed is a system including RF circuitry configured to generate an RF signal; a plurality of unit cells configured to receive the RF signal and to cause an RF energy signal having a center frequency to be present within the unit cells; and receiver circuitry configured to charge an electronic device in response to an antenna of the electronic device receiving the RF energy signal when the antenna is tuned to the center frequency and positioned in a near-field distance from one or more of the unit cells.
956 Citations
20 Claims
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1. A near-field transmitter comprising:
a plurality of unit cells configured to receive one or more radio frequency (RF) signals, each unit cell in the plurality of unit cells including; a metal layer having an interior perimeter that surrounds an aperture defined by the metal layer; and a patch antenna positioned within the aperture, wherein a perimeter of the patch antenna has a separation from the interior perimeter of the metal layer, the patch antenna being configured to; (i) receive one of the one or more RF signals, the received RF signal having a frequency based on the separation between the perimeter of the patch antenna and the interior perimeter of the metal layer, and (ii) radiate the received RF signal as an RF energy signal for charging an electronic device, wherein the RF energy signal is leaked at least in part through the separation between the perimeter of the patch antenna and the interior perimeter of the metal layer only when an antenna of the electronic device is positioned in a near-field distance from the unit cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of wirelessly delivering power to an electronic device, the method comprising:
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providing a near-field transmitter having at least one unit cell, the at least one unit cell including (i) a metal layer having an interior perimeter that surrounds an aperture defined by the metal layer, and (ii) a patch antenna positioned within the aperture, wherein a perimeter of the patch antenna has a separation from the interior perimeter of the metal layer; receiving, by the patch antenna, an RF signal that has a frequency based on the separation between the perimeter of the patch antenna and the interior perimeter of the metal layer; and radiating, by the patch antenna, the received RF signal as an RF energy signal for charging the electronic device, wherein the RF energy signal is leaked at least in part through the separation between the perimeter of the patch antenna and the interior perimeter of the metal layer only when an antenna of the electronic device is positioned in a near-field distance from the unit cell. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification