IOT without Electronic Transmitters

Discussion in 'Computing and Networks' started by BR-549, Dec 5, 2017.

  1. BR-549

    Thread Starter AAC Fanatic!

    Sep 22, 2013
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    1,059
    This is new....at least for me. Maybe someone is familiar with this. Let's see if I got this.

    The material that the 3D printed object is made of..........reflects a "noise pattern" that varies with the physical orientation to the wifi receiving antenna. The receiving software can detect these cyclic variations.

    Pretty neat. Echo sensing.

    https://phys.org/news/2017-12-d-wifi-electronics.html
     
  2. nsaspook

    AAC Fanatic!

    Aug 27, 2009
    4,803
    5,187
    Passive IFF systems have been around for ages.

    http://www.dean-boys.com/extras/iff/iffqa.html
     
    xox likes this.
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