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Remove SMA + solder aerial wire - signal degradation?

Arthur Sadler
Intellectual 280 points

I have a prototype product that I used a CC112X_EM eval board in to save time, but the SMA socket sits a bit high so I can't fit it into the case I want to put it in.I was going to plug an aerial extension lead in that goes to a bulkhead SMA socket.

I was wondering if I unsolder the SMA connector and cut the one end of the extension cable, and solder the wires onto the pads where the SMA connecter was? I don't know how big an effect this would have on impedance and degradation of signal quality. Does anyone have any insights?

Thanks

  • 0
    TI__Mastermind 27145 points

    Hi,

     

    Yes, SMA connector on CC112x EM can be replaced with a short Co-axial pigtial cable. Make sure that you connect both live and ground of the pigtail cable to the board. SMA port is a 50 ohm port, so the effeci (loss) is very miniumum when you use a short pigtail cable.

     

    Thanks,

    PM

     

  • 0
    TI__Mastermind 33170 points
    Using a straight wire as an antenna is still the best type of antenna when it comes to performance providing that the antenna length and impedance is correct.

    Regards, Richard