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Passive WiFi On Microwatts
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Passive WiFi On Microwatts
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29th February 2016, 05:44
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| [M] Reviewer  Join Date: May 2010 Location: Romania
Posts: 148,578
 |  Passive WiFi On Microwatts A lot of you use WiFi for your Internet of Things devices, but that pretty much rules out a battery-powered deployment because WiFi devices use a lot of juice. Until now. Researchers at the University of Washington have developed a passive WiFi implementation that uses only microwatts per device. Working essentially like backscatter RFID tags do, each node has a WiFi antenna that can be switched to either reflect or absorb 2.4 GHz radiation. Your cell phone, or any other WiFi device, responds to this backscattered signal. All that’s missing is a nice steady signal to reflect. http://hackaday.com/2016/02/26/passi...on-microwatts/ |
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