“A Stanford engineering team, in collaboration with researchers from the University of California, Berkeley, has built a radio the size of an ant, a device so energy efficient that it gathers all the power it needs from the same electromagnetic waves that carry signals to its receiving antenna – no batteries required.”
Source: news.stanford.edu
Via Gizmag:
http://www.gizmag.com/radio-on-a-chip-transceiver-iot/33797/
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