Ambient RF backscatter communication for vehicle remote control

A vehicle communicates with a remote key fob while ensuring an RF environment is sufficient to maintain adequate power from an RF-harvesting power supply that allows the fob to operate without a battery. The vehicle has a receiver adapted to detect a backscatter communication signal from the fob. A...

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Bibliographic Details
Main Authors Van Wiemeersch, John R, Elangovan, Vivekanandh, DeLong, Aaron M
Format Patent
LanguageEnglish
Published 10.03.2020
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Summary:A vehicle communicates with a remote key fob while ensuring an RF environment is sufficient to maintain adequate power from an RF-harvesting power supply that allows the fob to operate without a battery. The vehicle has a receiver adapted to detect a backscatter communication signal from the fob. A harvesting emulator in the vehicle is responsive to ambient RF around the vehicle to duplicate a concurrent response of the fob power supply. A vehicle-powered RF transmitter is activated to broadcast energizing RF radiation around the vehicle when the duplicated response is below a threshold.
Bibliography:Application Number: US201816217343