Problem with Matching network

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wakuhuaco

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I'm trying to Match my amplifier with Maximum Gain. I have to GammaS and GammaL with Conjugated Match (calculated GM1 and GM2 Of MWO linear measurements), and use those values in this application (http://www.amanogawa.com/archive/SeriesStub/SeriesStub-2.html) to develop the stub.
But when I measure the network "Mod (S11) and Mod (S22)" get between 0.5 and 0.8.
Any idea what may have been the problem?
 

Hi

I have not gone through your calculations. But I hope you have taken into account that the points GM1 and GM2 in MWO is normalized quantities?

Maybee something that could have been missing

Regards
 

Please do not try to match the amplifier to MAG, the amplifier may lead in to several problems like
stability, gain flatness over band, poor 50 ohm matching etc.
It is always better to target 2 to 3dB lower to MAG.
 

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