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designing lna with good i/p return loss and optimum noise F

Question asked by SUBHASH on Oct 14, 2004
Latest reply on Oct 17, 2004 by RANDY_RHEA

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this is with reference to the article published in RF DESIGN march 2002.we can optimize simultaneosly the lna i/p reurn loss and lna noise figure by using inductive feedback and by adjusting load reflection coefficient.my problem is to find out for what values of load reflection coefficient and the amount of inductor feedback is required we have to map load reflection on to the input plane in smith chart using following equation

      Tin=S11 +S12 S21 Tl
                   -------------
                  1-S22Tl

where Tin----input reflection coefficient
           Tl-----load reflection coefficient

how to plot this in genysys
any suggestions are welcome

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RANDY_RHEA Oct 17, 2004 7:48 AM
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Using internal measurements, such as the S-parameters of a network, to then compute and display alternative data is refered to in GENESYS documentation as Post Processing. Its use is described in the Simulation manual.

Please post questions regarding operation of the product in the Product Questions forum. I have moved this thread to that forum.

Clear skies and high Q
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designing lna with good i/p return loss and optimum noise F

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