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Device transmits radio waves with almost no power – without violating the laws of physics

  • Written by Joshua R. Smith, Professor of Electrical and Computer Engineering and of Computer Science and Engineering, University of Washington
Device transmits radio waves with almost no power – without violating the laws of physicsThis experimental setup shows an ultra-low-power wireless communications device that could one day be used in tiny remote sensors.Zerina Kapetanovic, CC BY-ND

A new ultra-low-power method of communication at first glance seems to violate the laws of physics. It is possible to wirelessly transmit information simply by opening and closing a switch...

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