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Twin lead Tx line radiation losses

  1. Jan 9, 2014 #1
    Hi all

    I understand that at high frequencies, a twin lead Tx line has high radiation losses because the conductor separation becomes close to the wavelength size, allowing the conductors to act as antennas. Can one still be used to transfer a high frequency signal a short distance from an antenna to a receiver though? More specifically, could one use a twin lead with a 1 cm conductor spacing to transfer a ~10 GHz signal (wavelength ~3 cm) if the line length is only a couple of centimeters at most? Or will the radiation losses be too high even for that? The reason I would want to do that over using a coax is that the device I am making needs to be as compact as possible, and I would rather not have to devote room to baluns. My signal doesn't have to be that strong anyway at the end of the day and I have amplifiers (which I will need to use whether I use a coax or twin lead) to deal with signal strength issues.

    Thank you
    Last edited: Jan 9, 2014
  2. jcsd
  3. Jan 9, 2014 #2


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    10GBaseT Ethernet can be carried over a twisted pair. You could look up some application notes for use of those modems. You might even be able to use the drivers somehow.
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