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Submission + - Wireless devices go battery-free with new communication technique (washington.edu)

melios writes: The new communication technique, which the researchers call “ambient backscatter,” takes advantage of the TV and cellular transmissions that already surround us around the clock. Two devices communicate with each other by reflecting the existing signals to exchange information. The researchers built small, battery-free devices with antennas that can detect, harness and reflect a TV signal, which then is picked up by other similar devices.
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Wireless devices go battery-free with new communication technique

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