Hello there, I have a quick question.
I'm an undergraduate physics major learning a few basics on Microwave theory with regards to communications. I've been reading many papers and I understand what S-parameters are and signal analysis along transmission lines. My question is quite fundamental.
What does a Vector Network Analyzer (VNA) actually measure? All the papers and tutorials I've been reading describe the VNA as measuring the incident & reflected/transmitted signal, but none actually have said what that signal actually is. Is it a voltage, current, or power signal?? Or is it something else??
Thanks for your time
Joe