active balun

Discussion in 'The Projects Forum' started by microjo, May 13, 2008.

  1. microjo

    Thread Starter New Member

    May 13, 2008
    Hi everybody!
    I am working on an active microwave balun. This is comparable to an amplifier having a single input and a differential output.
    Most puplications dealing with it use a CGF and a CSF in parallel realizing a 180° output, however they are all integrated circuits. In my project I have to build it with discrete FETs. Beeing new to this topic I have a few starting problems. Most S-parameters that I get are for common source only. And If they provide a equivalent circuit model (for ADS) the CS and CG configurations provide different gains, so that they are not applicable for a differential output.
    Do I have to use completely different FETs for the CS and CG configuration? how can I get CS and CG FETs with similar gain performance?
    thanks in advance
  2. Saba79

    New Member

    Jul 7, 2008
    Hallo Microjo

    I wonder if you have a soultion for your problem since i face the same now it will be great to get answer,,,,

    Thanks in Advance