Selective wireless charging of slave devices while limiting human exposure to RF beams
First Claim
Patent Images
1. A method for selective wireless charging of a slave device, said method comprising:
- selecting said slave device if said slave device has authorized being charged;
using a directional antenna to form an RF beam using RF signals from a transmitter in a master device;
said directional antenna comprising sub-elements such that through different phases and amplitudes of said sub-elements said RF beam is formed at an angle in a favored direction to selectively confine wireless power to a space where said slave device is situated.
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Abstract
Some embodiments provide a system for charging devices. The system includes a master device and a slave device. Some embodiments provide a method for charging devices in a system that includes a slave device and a master device. The slave device includes (1) an antenna to receive a radio frequency (RF) beam and (2) a power generation module connected to the antenna that converts RF energy received by the slave antenna to power. The master device includes (1) a directional antenna to direct RF power to the antenna of the slave device and (2) a module that provides power to the directional antenna of the master device.
78 Citations
22 Claims
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1. A method for selective wireless charging of a slave device, said method comprising:
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selecting said slave device if said slave device has authorized being charged; using a directional antenna to form an RF beam using RF signals from a transmitter in a master device; said directional antenna comprising sub-elements such that through different phases and amplitudes of said sub-elements said RF beam is formed at an angle in a favored direction to selectively confine wireless power to a space where said slave device is situated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A master device for selective wireless charging of a slave device, said master device comprising a directional antenna, said master device being configured to:
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select said slave device if said slave device has authorized being charged; use RF signals from a transmitter in said master device to form an RF beam using said directional antenna, wherein said directional antenna comprises sub-elements such that through different phases and amplitudes of said sub-elements said RF beam is formed at an angle in a favored direction to selectively confine wireless power to a space where said slave device is situated. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system for selective wireless charging, said system comprising:
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a slave device being selected if said slave device has authorized being charged; a master device using a directional antenna to form an RF beam using RF signals from a transmitter in said master device; said directional antenna of said master device comprising sub-elements such that through different phases and amplitudes of said sub-elements said RF beam is formed at an angle in a favored direction to selectively confine wireless power to a space where said slave device is situated. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification