▲ 251 ▼ Microwave Intensifies (mander.xyz) submitted 1 year ago by fossilesque@mander.xyz to c/science_memes@mander.xyz 62 comments fedilink hide all child comments
[–] fartographer@lemmy.world 42 points 1 year ago (7 children) Long live the Pringles cantenna permalink fedilink source hideshow 7 child comments replies: [–] fullsquare@awful.systems 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 permalink fedilink source parent hideshow 5 child comments replies: [–] Pencilnoob@lemmy.world 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 permalink fedilink source parent hideshow 4 child comments replies: [–] fullsquare@awful.systems 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 permalink fedilink source parent hideshow 3 child comments replies: [–] Pencilnoob@lemmy.world 3 points 1 year ago (2 children) We didn't use Pringles, I think it was these big peaches cans permalink fedilink source parent hideshow 2 child comments replies: [–] fullsquare@awful.systems 3 points 1 year ago helical antennas work fine too and look goofy as hell permalink fedilink source parent [–] fullsquare@awful.systems 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 permalink fedilink source parent [–] Landless2029@lemmy.world 3 points 1 year ago Wardriving intensifies permalink fedilink source parent
[–] fullsquare@awful.systems 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 permalink fedilink source parent hideshow 5 child comments replies: [–] Pencilnoob@lemmy.world 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 permalink fedilink source parent hideshow 4 child comments replies: [–] fullsquare@awful.systems 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 permalink fedilink source parent hideshow 3 child comments replies: [–] Pencilnoob@lemmy.world 3 points 1 year ago (2 children) We didn't use Pringles, I think it was these big peaches cans permalink fedilink source parent hideshow 2 child comments replies: [–] fullsquare@awful.systems 3 points 1 year ago helical antennas work fine too and look goofy as hell permalink fedilink source parent [–] fullsquare@awful.systems 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 permalink fedilink source parent
[–] Pencilnoob@lemmy.world 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 permalink fedilink source parent hideshow 4 child comments replies: [–] fullsquare@awful.systems 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 permalink fedilink source parent hideshow 3 child comments replies: [–] Pencilnoob@lemmy.world 3 points 1 year ago (2 children) We didn't use Pringles, I think it was these big peaches cans permalink fedilink source parent hideshow 2 child comments replies: [–] fullsquare@awful.systems 3 points 1 year ago helical antennas work fine too and look goofy as hell permalink fedilink source parent [–] fullsquare@awful.systems 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 permalink fedilink source parent
[–] fullsquare@awful.systems 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 permalink fedilink source parent hideshow 3 child comments replies: [–] Pencilnoob@lemmy.world 3 points 1 year ago (2 children) We didn't use Pringles, I think it was these big peaches cans permalink fedilink source parent hideshow 2 child comments replies: [–] fullsquare@awful.systems 3 points 1 year ago helical antennas work fine too and look goofy as hell permalink fedilink source parent [–] fullsquare@awful.systems 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 permalink fedilink source parent
[–] Pencilnoob@lemmy.world 3 points 1 year ago (2 children) We didn't use Pringles, I think it was these big peaches cans permalink fedilink source parent hideshow 2 child comments replies: [–] fullsquare@awful.systems 3 points 1 year ago helical antennas work fine too and look goofy as hell permalink fedilink source parent [–] fullsquare@awful.systems 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 permalink fedilink source parent
[–] fullsquare@awful.systems 3 points 1 year ago helical antennas work fine too and look goofy as hell permalink fedilink source parent
[–] fullsquare@awful.systems 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 permalink fedilink source parent
[–] Landless2029@lemmy.world 3 points 1 year ago Wardriving intensifies permalink fedilink source parent
