u/Pretend-Poet-Gas

Hi guys,

I have designed a PCB-based power amplifier using Keysight ADS.

After I fabricate it and perform an initial CW sweep, I found the frequency shifted from 3.5 GHz (in simulation) to 3.3 GHz (measurement).

I wonder how do I model this frequency shift in the simulation, or I just tuned the board based on the 3.3GHz results? Previously, I just directly tuned the board instead of going back to the simulation to model this issue. I wonder if there is a better way to do it.

When I say 'better,' I mean the simulator should guide me to the exact place on board to touch.

What is your suggestion?

Thank you!