Smart Homes Could Benefit from Internet Connected Sensors That Power Themselves from Wi-Fi, TV, and Cellular Signals | MIT Technology Review

 

Air power: This antenna harvests signals from TV, radio, and cellular transmissions so that small Wi-Fi devices can get by without batteries.

Smart Homes Could Benefit from Internet Connected Sensors That Power Themselves from Wi-Fi, TV, and Cellular Signals | MIT Technology Review.

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