Smart RF lensing: efficient, dynamic and mobile wireless power transfer
AssigneeCalifornia Institute of Technology
InventorsKaushik Sengupta, Seyed Ali Hajimiri
Life of this patent
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Abstract
An RF lens includes a multitude of radiators adapted to transmit radio frequency electromagnetic EM waves whose phases are modulated so as to concentrate the radiated power in a small volume of space in order to power an electronic device positioned in that space. Accordingly, the waves emitted by the radiators are caused to interfere constructively at that space. The multitude of radiators are optionally formed in a one-dimensional or two-dimensional array. The electromagnetic waves radiated by the radiators have the same frequency but variable amplitudes.
Claims25
A wireless device configured to be powered by radio frequency (RF) electromagnetic waves radiated by a first plurality of radiators forming an RF lens, said wireless device being further configured to transmit a signal to the RF lens, wherein said RF lens determines a position of the wireless device using differences in phases of the transmitted signal as received by three or more of the plurality of radiators, wherein said wireless device is retro-fitted externally with components to receive the electromagnetic waves.
A wireless device configured to be powered by radio frequency (RF) electromagnetic waves radiated by a first plurality of radiators forming an RF lens, said wireless device being further configured to transmit a signal to the RF lens, wherein said RF lens determines a position of the wireless device from differences in phases of the signal as received by three or more of the plurality of radiators, wherein the first plurality of radiators form a first tile adapted to be positioned directly next to a second tile comprising a second plurality of radiators, said first and second tiles being in electrical communication with one another and operating in concert to radiate electromagnetic waves to power the wireless device.
Dependencies are inferred from the claim text.