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Scheduled Pinned Locked Moved Lemmy Shitpost
lemmyshitpost
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  • j4k3@lemmy.worldJ [email protected]

    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.

    S This user is from outside of this forum
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    [email protected]
    wrote on last edited by
    #19

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

    T S tgxn@lemmy.tgxn.netT 3 Replies Last reply
    11
    • S [email protected]

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

      T This user is from outside of this forum
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      wrote on last edited by
      #20

      All those confident words they typed... for nothing. Lol

      S 1 Reply Last reply
      10
      • deegeese@sopuli.xyzD [email protected]

        The mesh is not dense enough to be a true Faraday cage for 2.4GHz, but is dense enough to hurt signal strength.

        socsa@piefed.socialS This user is from outside of this forum
        socsa@piefed.socialS This user is from outside of this forum
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        wrote on last edited by
        #21

        Probably not for a MIMO AP. The whole idea is that you solve the equations to optimize in the presence of multipath. It's legit wizard shit but it's the reason why your cell phone works in a parking garage, because the optimal channel is bouncing off the ventilation shaft. For any reasonably modern AP, it should work the same way. This might hurt a bit but not that much.

        deegeese@sopuli.xyzD 1 Reply Last reply
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        • H [email protected]
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          marighost@piefed.socialM This user is from outside of this forum
          marighost@piefed.socialM This user is from outside of this forum
          [email protected]
          wrote on last edited by
          #22

          I'm just impressed they labelled the WAP.

          A 1 Reply Last reply
          0
          • S [email protected]

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

            S This user is from outside of this forum
            S This user is from outside of this forum
            [email protected]
            wrote on last edited by
            #23

            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.

            S Z 2 Replies Last reply
            1
            • H [email protected]
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              wrote on last edited by
              #24

              Maybe if use smaller, tighter squares.

              1 Reply Last reply
              6
              • T [email protected]

                All those confident words they typed... for nothing. Lol

                S This user is from outside of this forum
                S This user is from outside of this forum
                [email protected]
                wrote on last edited by
                #25

                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.

                T 1 Reply Last reply
                1
                • S [email protected]

                  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.

                  S This user is from outside of this forum
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                  wrote on last edited by
                  #26

                  I guess lol

                  1 Reply Last reply
                  0
                  • J [email protected]

                    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.

                    T This user is from outside of this forum
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                    wrote on last edited by
                    #27

                    2.4GHz wifi has a wavelength of 12cm

                    that's actually massive, I thought it would be like half a centimeter at most

                    Z 1 Reply Last reply
                    2
                    • T [email protected]

                      They need more "I" in their IT, plastic protectors exist.

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                      wrote on last edited by [email protected]
                      #28

                      If it's higher than eye-level, they don't need a cage for it at all. It's not even locked, just use any old Phillips screwdriver to remove the 4 screws!

                      J C 2 Replies Last reply
                      0
                      • E [email protected]

                        If it's higher than eye-level, they don't need a cage for it at all. It's not even locked, just use any old Phillips screwdriver to remove the 4 screws!

                        J This user is from outside of this forum
                        J This user is from outside of this forum
                        [email protected]
                        wrote on last edited by
                        #29

                        The cage is to protect it from flying balls.

                        E 1 Reply Last reply
                        4
                        • S [email protected]

                          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.

                          T This user is from outside of this forum
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                          wrote on last edited by
                          #30

                          I was agreeing with you

                          S 1 Reply Last reply
                          4
                          • T [email protected]

                            I was agreeing with you

                            S This user is from outside of this forum
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                            wrote on last edited by
                            #31

                            Ah lol I gotcha!

                            1 Reply Last reply
                            0
                            • T [email protected]

                              2.4GHz wifi has a wavelength of 12cm

                              that's actually massive, I thought it would be like half a centimeter at most

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                              [email protected]
                              wrote on last edited by [email protected]
                              #32

                              Newer standards are substantially shorter at 5GHz and 6GHz, but this comes at the cost of significantly worse signal penetration through walls.

                              T 1 Reply Last reply
                              1
                              • H [email protected]
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                                wrote on last edited by
                                #33

                                The mesh is just about the size of the wifi wage length

                                1 Reply Last reply
                                1
                                • H [email protected]
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                                  wrote on last edited by
                                  #34

                                  Yeah boss the RSSI numbers look great!

                                  1 Reply Last reply
                                  0
                                  • E [email protected]

                                    "I see the problem, your AP is in the Faraday Chasity Cage. Closing ticket."

                                    match@pawb.socialM This user is from outside of this forum
                                    match@pawb.socialM This user is from outside of this forum
                                    [email protected]
                                    wrote on last edited by
                                    #35

                                    Putting my horny robots in the faraday chastity cage

                                    1 Reply Last reply
                                    4
                                    • E [email protected]

                                      If it's higher than eye-level, they don't need a cage for it at all. It's not even locked, just use any old Phillips screwdriver to remove the 4 screws!

                                      C This user is from outside of this forum
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                                      [email protected]
                                      wrote on last edited by
                                      #36

                                      Why would it be locked????

                                      1 Reply Last reply
                                      0
                                      • socsa@piefed.socialS [email protected]

                                        Probably not for a MIMO AP. The whole idea is that you solve the equations to optimize in the presence of multipath. It's legit wizard shit but it's the reason why your cell phone works in a parking garage, because the optimal channel is bouncing off the ventilation shaft. For any reasonably modern AP, it should work the same way. This might hurt a bit but not that much.

                                        deegeese@sopuli.xyzD This user is from outside of this forum
                                        deegeese@sopuli.xyzD This user is from outside of this forum
                                        [email protected]
                                        wrote on last edited by
                                        #37

                                        MIMO will solve lensing issues but not internal reflection or absorbance.

                                        So like OP says, it’s a signal strength issue.

                                        1 Reply Last reply
                                        1
                                        • marighost@piefed.socialM [email protected]

                                          I'm just impressed they labelled the WAP.

                                          A This user is from outside of this forum
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                                          wrote on last edited by
                                          #38

                                          Get a bucket and a mop for that wireless access point

                                          kolanaki@pawb.socialK 1 Reply Last reply
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