cascade s-parameters
Hy Guys,
Many thanks for the replies.
Yes that is correct. The s-parameters from the amplifiers also contains noise parameters like you mentioned, but the filter does not.
In this case, the data that you get with any filter vendor does only contains the full s-parameters (S11, S12, S21 and S22) but does not contains noise data.
If not, so how can it possible to plot the total noise figure of those linear devices together ? So from what I have read it is not possible because we need additional data like noise for the filter(s) most likely due to mismatches between the elements.
Still, as I can see from your previous comments the Fmin could be derived from the filter insertion loss, that is ok and I can add this into the s-par matrix. What about the Rn (Equivalent Noise Resistance) ?
Any inputs are welcome from your side. Anyway many thanks for your previous comments.