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WiFi Antennas

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vidarr:
There are three antennas on this Cisco E2000 WiFi router that I have. Someone cut the wires for some reason. There are no datasheets that I can find that specifies which antenna goes to which connection point on the board.

Is it possible to figure this out by trial and error, or will using the wrong antenna on the wrong connection ruin the board (like using the WiFi with no antenna sometimes does)?

Better, does anyone know which one is which? That would be awesome.

Thanks!

magic:
It always helps to search for images with keywords like "router XYZ internal pcb".

I found this. The antennas look similar to yours.
https://img5.pcpop.com/ProductImages/500x375/1/1221/001221088.jpg

I ought to have a similar router somewhere in my junk box, but I don't remember it having three antennas, I think it was just two :-//
I could take a look later if you want.

fzabkar:
The FCC database is a good source of information, including internal photos:

https://fccid.io/Q87-E3000/Internal-Photos/Internal-Photos-1222035.pdf

https://fccid.io/Q87-E3000

coromonadalix:
not sure if they u-fl  or a smaller variant

Bought many of theses cables or foil, flexibles pcb look a like   etc ...   you just need to know the working frequency ... they sell for cheap

when possible  i buy the ones with sma connectors and put an antenna instead,   more gain, more distance
2.4 GHz WiFi   
5 GHz WiFi   

magic:

--- Quote from: fzabkar on December 06, 2022, 12:04:22 am ---The FCC database is a good source of information, including internal photos:

https://fccid.io/Q87-E3000/Internal-Photos/Internal-Photos-1222035.pdf

https://fccid.io/Q87-E3000

--- End quote ---
That's interesting, some productive use of taxpayer money at last :-+

But I'm not sure what to make of it. It looks like the cables are soldered down to the board, but they show disconnected u.FL connectors on another pic?

BTW, soldering the cut cables to the board (if possible) may be more effective than trying to splice them. I have never tried splicing RF coax, but it sounds like something that may or may not work out very well. (I guess it also depends on how you do it.)


As for my old router, it's E1000. 2.4GHz only and it has two antennas soldered to the PCB. I'm too lazy to open it now, but I'm almost sure it looked exactly like this one:
https://vignette.wikia.nocookie.net/infodepot/images/3/32/Linksys_E1000_v1.0_FCCf.jpg/revision/latest

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