Powerless tech better than your common-or-garden RFID tag, claim researchers
Radio boffins from the University of Washington have created tags and readers which reflect and feed off ambient radio frequency energy for communications - without needing a power source.…
via The Register - Networks
http://go.theregister.com/feed/www.theregister.co.uk/2013/08/14/boffins_hawk_powerless_radio/
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