The Humantenna from Microsoft

[Karl W4KRL]

No, you can't be a 40m dipole by stretching your arms but you might be able
to track every move your neighbor makes if they have Wi-Fi in their home.

 

http://arstechnica.com/information-technology/2013/06/researchers-teach-wi-f
i-to-see-identify-gestures/

 

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