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Microwave Intensifies (mander.xyz)
submitted 1 year ago by to c/science_memes@mander.xyz
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[–] 7 points 1 year ago* (last edited 1 year ago) (5 children)

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

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  • [–] 4 points 1 year ago (4 children)

    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

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  • [–] 2 points 1 year ago (3 children)

    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

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  • [–] 3 points 1 year ago (2 children)

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

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  • [–] 2 points 1 year ago* (last edited 1 year ago)

    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

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