Re:A Las Vegas Resort Using Microwaves to Keep Guns Out
by jakobegger on Tuesday December 12, 2017 @06:20PM
(#15910452)
Microwave radiation just isn‘t suitable for imaging people. Google for „diffraction limit“ to learn why.
That‘s why the devices in this article, unlike millimeter wave scanners, can‘t create an image of the scanned subjects. (and it’s also the reason why why millimeter wave scanners make very blurry images).
Instead, these detectors look for resonances in the emmitted spectrum.
The article was a bit light on details, but this description sounds very much like an old school metal detector, rather than an imaging device.
Do you have a source? It's described as using an antenna and a receiver, which is exactly how the naked scanners at the airport work: https://en.wikipedia.org/wiki/Millimeter_wave_scanner#Techni...
They may use different frequencies (airport scanners are in 24–30 GHz band) but it's the same technology.