Protection
Protection
Protection
Remember when some jokers started selling Faraday cages for Wi-Fi routers on Amazon, claiming that it would protect the user from wireless signals?
well i mean they're not lying
This is a 2.4 GHz directional WiFi antenna. Only the back element is connected to the transceiver. All of the other elements are there to focus the signal. Anything metallic within a few feet of an antenna will have a substantial effect on the signal. Think of it as light, because it is, only transparency of materials is a bit weird. The biggest issues will come from metallic materials that are earth grounded and anything with a wire length that is close to the wavelength of the radio light or below, especially around half and a quarter of the wavelength. That pictured wire pitch is spaced very close to the approximate 2.4 GHz wave length. For example most antenna are an insulated trace on a circuit board that is insulated with ground up to a point and then there is a small circuit element that stops the ground and the actual antenna trace continues for the respective light wavelength to transmit or receive. All an antenna is here is an exposed length of single conductor wire.
That's just an AP. That's not a directional antenna for a wireless bridge. You can even read the AP sticker on it.
All those confident words they typed... for nothing. Lol
I think they were trying to say that the cage in front with the AP behind, acts as a directional antenna. Similar to how Yagi antennas have metal elements that aren't connected in front of the actual antenna.
But I don't know enough antenna theory to know if that's correct.
Yeah, It looks like a Cisco Aironet 2702i WAP.
Even if this was right, which it isn't, wifi stopped being 2.4Ghz exclusive almost 20 years ago. You have 5Ghz and since 5 year ago or so, 6Ghz, with significantly shorter wavelengths.
Hmm I don't think I get this one.
Is it because its in a cage? I don't think that will do much to block the WiFi antenna.
Faraday cages cannot block stable or slowly varying magnetic fields, such as the Earth's magnetic field (a compass will still work inside one). To a large degree, however, they shield the interior from external electromagnetic radiation if the conductor is thick enough and any holes are significantly smaller than the wavelength of the radiation
I'm certainly no expert, but something tells me the cage in OP's pic doesn't fit the criteria to act as a faraday cage.
E: Nope, I'm wrong. u/deegeese has informed me on how big the wavelength is.
Wifi is a fickle beast, though you may be right.
The elements of the cage will probably interfere, but won't straight up block the signal. To be an effective faraday cage, holes in the material must be no bigger than 1/10th the wavelength.
2.4GHz wifi has a wavelength of 12cm, and 5GHz is about 5cm...so holes in the cage should be no bigger than 1.2cm for 2.4GHz, or 0.5cm for 5GHz.
I may expect some signal reflection and likely a high noise floor as a result to being so close to a hunk of metal. That'll cause some problems.
Problem #1 is this AP is oriented vertically on a wall. The antennas in these models are designed to be parallel to the floor, and usually not much higher than 15ft.
Faraday was here!
Maybe if use smaller, tighter squares.
I'm just impressed they labelled the WAP.
Get a bucket and a mop for that wireless access point
*Wet Access Point.
Yeah boss the RSSI numbers look great!
Oh I see the issue... They forgot to ground the cage
The mesh is just about the size of the wifi wage length
"I see the problem, your AP is in the Faraday Chasity Cage. Closing ticket."
Putting my horny robots in the faraday chastity cage