Edit: I think we double posted but I had a go at making a quick and dirty amplifier that would have similar properties as the Crystek MMIC amp (back in post #36) and I've listed the results below.
The aim was to simulate and predict the performance using the manufacturer's S2p data for my MMIC (in my case I used and old SBB-5089Z) and a simulation of the PCB layout using Genesys and Sonnet. Then compare it (using a VNA) to a measurement of the real circuit built on a PCB. It's possible to design the circuit and PCB in Genesys and then export it all to Sonnet to simulate the PCB layout. I find this setup works really well.
The Genesys plot below shows the simulation data for S21 and S12 and also the imported data of the real PCB with a real 5089Z MMIC on it. i.e. the VNA was used to compare/confirm the simulation.
There's a plot showing the input VSWR for both the real PCB and the simulation and you can see they agree quite well. The two green traces almost overlay perfectly
However, I did cheat a bit because my simulation only goes to 5GHz and not 6GHz. At 6GHz my bias choke has a slight resonance and it spoils the comparison. I don't have an accurate model of the bias choke at 6GHz so I cheated and cropped the data at 5GHz.
I've also included an image of the real PCB when it was being tested on the VNA. This is a quick and dirty test PCB milled on some 0.031" FR4 material.
The results agree very closely and this is partly due to the accuracy of the manufacturer's s2p data for the 5089Z MMIC.