i cut the stub away , and now the magnitude of S11 and S22 is almost the same as provided by the manufacturer.
okay now i want to ask: if u have an IC of a partially matched amplifier and u want to match it at a particular freq, can u do this or not ??
once i designed a LNA , there is compromise between RL , noise figure during input matching network design. now lets say some1 design the LNA for minimum Noise figure and then it provides u only S parameters of this module. now u say its RL is not good at this freq , can u draw a matching network only on the basis of S parameters, would it only be a conjugare match and addition of an extra matching network wouldnt change the provided S parametrs ??