this post was submitted on 15 May 2024
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trying to fix a wifi antenna need some help ๐Ÿ˜…... (lemmy.ml)
submitted 6 months ago* (last edited 6 months ago) by DNOS@lemmy.ml to c/askelectronics@discuss.tchncs.de
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Hy I bought a cheap Yagi wifi antenna need some help cause the previous owner broke it and tried to fix it red neck style... It didn't work ... I hope I would be able to add a picture here is a breaf description anyway it's the cheapest brand you can find online the main element is formed into an oval shaped metal ring and here comes my question where should I solder the middle wire ? On one end ? On the other ? Should I pass it throu the (hollow) metal ring and weld it back to himself ? I have seen people build Yagies with similar ovaly shaped rings and they made the cable pass through half the ring and weld it there the problem is that my ring is shaped exactly like a C it doesn't have a second gap in the middle of the left part ... (Here=>C) English is not my first language hope it's good enough to be understood ask if not ๐Ÿ‘๐Ÿป

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[โ€“] lemann@lemmy.dbzer0.com 3 points 6 months ago

I recently setup a Meshtastic lora node and realized antennas are complicated... I never knew there were ones that are most resonant on specific frequencies and stuff, the importance of having the impedance close to 50ohms for best performance. And fake amazon ones that give you only 8cm of antenna wire inside a 37mm shaft ๐Ÿคฆโ€โ™‚๏ธ

That said, I am shocked that something the size of my thumb can communicate 1km through buildings, and uphill to the other side of my village on such low power. This radio stuff is really fascinating.