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Re:A Las Vegas Resort Using Microwaves to Keep Guns Out by nickysielicki on Tuesday December 12, 2017 @12:44PM (#15907646)
FCC docs for this machine: https://fccid.io/2ALZTCMR

Photos:

* housing and antennas: https://fccid.io/2ALZTCMR/External-Photos/External-Photos-35...

* internals: https://fccid.io/2ALZTCMR/Internal-Photos/Internal-Photos-35...

edit: I only really know about part 15 as it relates to amateur radio, but I am confused at how this device was certified. The device is noted as being licensed under part 15F, and 15F, § 15.521(b) clearly notes that § 15.203 applies to these devices. Relevant part of 15.203 below:

> An intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator shall be considered sufficient to comply with the provisions of this section.

Clearly from the photos that isn't the case, those connectors are not special in any way and those antennas aren't permanently affixed.

I think that is why this document exists, where they try to say that they're an unintentional radiator: https://fccid.io/2ALZTCMR/Attestation-Statements/Part-15B-35...

Which is completely absurd at face value. They're obviously not unintentionally radiating (like a plasma TV, for example) and they're purposefully putting out the signals so that they can detect things, and the fccid site clearly says that they're licensed as a 15F device, not a 15B device.

Can someone explain?

Re:A Las Vegas Resort Using Microwaves to Keep Guns Out by leephillips on Tuesday December 12, 2017 @01:00PM (#15907807)
Interesting questions. Also interesting antenna design. Are the sawtooth-like gaps some kind of filter?