Output Noise Figure

  • Kevin

    Kevin - 2013-04-09


    I have a matched LNA netlist that I want to output the Gain and Noise Figure to verify the simulation matches what I expect to see.
    I use Gain=dB(S[2,1]) but I can't figure out a good equation for the Noise Figure. It looks like from the reference manual F, and Fmin are QUCS generated variables but they don't seem to work for me. Any help would be appreciated!


  • Frans

    Frans - 2013-04-09

    Dear Kevin,

    I don't really understand your question. What do you mean by equation for
    the noise figure? I guess there is more than one. Please be more specific.
    If you mean that the variables simply don't exist, you have to enable noise
    in your s parameter simulation block.


  • Kevin

    Kevin - 2013-04-15

    Thanks Frans,
    I didn't know you had to enable noise in the S-parameters block, that solved my problem.


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