• Etterra@discuss.onlineEnglish
    2·
    6 days ago

    Remember when some jokers started selling Faraday cages for Wi-Fi routers on Amazon, claiming that it would protect the user from wireless signals?

  • 𞋴𝛂𝛋𝛆@lemmy.worldEnglish
    0·
    6 days ago

    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.

    • SupraMario@lemmy.world
      1·
      6 days ago

      That’s just an AP. That’s not a directional antenna for a wireless bridge. You can even read the AP sticker on it.

        • SupraMario@lemmy.world
          0·
          6 days ago

          I must be missing the joke or something? That’s literally what this is. It’s an AP not a directional antenna. I have used a ton of directional antennas. Hell I have one that I’m using to get my network to my garage which is 1/4 of a mile away.

    • Tja@programming.dev
      0·
      5 days ago

      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.

      • zaphod@sopuli.xyz
        1·
        5 days ago

        And if I look at the frequency spectrum I see that all my neighbours use 2.4GHz (9 are in channel 8) and I got the entire 5GHz spectrum to myself.