If I have an RF amplifier where I know it's source impedance, I can either use math or simulations to find a theoretical matching network to turn it into 50 ohms. However, reality is often different than theory, so once it is built, how can I verify this matching network to make sure the components are optimal? If I replace the RF amplifier with an SMA jack, is it as simple as hooking up a VNA, measuring the impedance, and verifying it is the complex conjugate of the RF amplifier source impedance?
If that is a good approach, how do you make sure your measurement plane using the SMA jack matches the RF amplifier?
Is it also possible to verify the matching network by having the amplifier output a continuous wave, measuring the 50 ohm side, and verifying you are seeing the max power being output?
Essentially, I am thinking of making a test PCB with 2 identical circuits, except replacing the RF amplifier with an SMA jack on one (see attached image). Will this work how I think it will? Is there a better way to verify impedance matching?
Edit: The frequency of interest is 915 MHz, and when I say "source impedance", I mean I have the load-pull data for the amplifier