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Thread: antenn's with usb wifi?

  1. #1
    FLAC djmickyg's Avatar
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    antenn's with usb wifi?

    here is a pic of the inside of my promix usb wifi card
    it has 2 large solder traces on the board which would be the antenna

    if i were to solder a small legth of antenna wire to them and conect a n-type connector to the end so i can attach a proper antena.. would this work..

    would i use both solder tracks?

    i hope this makes sense?

    thanks mick
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  2. #2
    FLAC john1701's Avatar
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    should. done it with a belkin g54 usb. I put N connector to it also to connect it to a 1w wifi amp.
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  3. #3
    FLAC djmickyg's Avatar
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    did urs have 2 onboard antennas like this one??

  4. #4
    FLAC john1701's Avatar
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    yes. by the picture you posted i recommend soldering the center wire of the N connector to the conection on the left. I will get pictures of mine posted later today.
    The MC of Florida Car PC Meets
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  5. #5
    FLAC djmickyg's Avatar
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    thanks... do u know where there are 2? what does the right one do??

  6. #6
    FLAC john1701's Avatar
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    center pin of n connector solder to the left, solder the outer pin to the right.
    The MC of Florida Car PC Meets
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    The Florida Meets Thread

  7. #7
    FLAC djmickyg's Avatar
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    well i fonally got around to this..
    its working fine (outside the car)
    sorry bout the quality of the pics.
    here is my little wire from the board

    out the little hole i drilled


    the antenna, its about 20cm long and ment to have a 7db increase

    and the verdict..
    i didnt think it would actualy make much of an increase because ive got about 2m of wire b4 the antenna.. i just wanted to be able to have an external antenna cus the car blocks out to much
    but it actually does a little

  8. #8
    Constant Bitrate John_Duh's Avatar
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    dunno all that much about wifi (yet) but i believe i read something about two antennas not being all that good.
    I think you'd be better off to just loose the internal antenna and connect your wire directly to the leads that go to the metal pads. (if this makes any sence)

    A good starting point about wifi is netstumbler.org, might be worth checking out what's going on there.

    Hope this helps
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  9. #9
    Variable Bitrate numbers's Avatar
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    If you still care...

    If the two meter cable run is the same lmr195ish stuff shown in the picture, replacing it with some lmr240 would almost certainly decrease signal loss noticibly.

  10. #10
    MySQL Error jcdillin's Avatar
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    also if you desolder the shield of the coax from the 2nd antenna and solder if to the casing you should get even better signal, by soldering the line to the 2nd antenna your not giving the cable a good shield.
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