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fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 6 days ago

Microwave Intensifies

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Microwave Intensifies

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fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 6 days ago
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  • fartographer@lemmy.world
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    6 days ago

    Long live the Pringles cantenna

    • fullsquare@awful.systems
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      6 days ago

      pringles can is too small for 2.4ghz cantenna, it’s near cutoff frequency but just barely, you need 10cm-ish diameter can or shorter 16cm-ish can

      • Pencilnoob@lemmy.world
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        6 days ago

        I once made one of these with a bigger can and mounted it on an old 10’ satellite dish. Managed to get Wi-Fi across several thousand yards without issue

        • fullsquare@awful.systems
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          6 days ago

          wait i thought for some reason that pringles can sized waveguide would have cutoff frequency above 2.4ghz. nevermind, there’s something better because bigger aperture can get you more directivity like this https://lea.hamradio.si/~s53mv/wumca/cup.html i made two out of cookie tins and it works over 500m at least

          • Pencilnoob@lemmy.world
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            6 days ago

            We didn’t use Pringles, I think it was these big peaches cans

            • fullsquare@awful.systems
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              6 days ago

              helical antennas work fine too and look goofy as hell

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              i’ve used the same (800ml can) and this one works well. cookie tin is 15cm dia 8cm tall and it works, but size can vary a bit. you can copy or scale slightly designs of 13cm band antennas

    • Landless2029@lemmy.world
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      Wardriving intensifies

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