Hi,
In a two stage microwave amplifer, how so you design the interstage matching network. The first stage already works, and I need to increase the gain. I am not sure how do design the second stage. What do I need to consider when the design the second stage - the interstage matching network, output matching network etc...
sthim
That MMIC thing? Was that you? You could use a Wilkinson divider to match to a bunch of identical ERA-whatevers in parallel and use a Wilkinson divider as a combiner to get that 40dBm (?) output.
No. That was someone else. You're the reflection coeficient guy.
You plot the relection coefficient that the output and input of next stage want to see on a Smith chart and connect the dots with inductances and capacitances and/or transmission line transformers.
For small signal amplification at the "front end," conjugate matching is pretty much the universal technique. One typically starts with the s-parameters and goes from there.
I am a little confused. How do I find the input and output reflection coefficient of the next stage? Once I find them what do I match them to???
Thanks, sthim
Didn't you do that search for linvall / rolette and small signal amp design I suggested? I guess not. You get the coefficients from the s-param data and the design equations and match output of stage
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