vna

Hi everyone. For anyone working on open hardware vector network analyzers, I'd like to put in a plug for the open source VNA software library, libvna, available in python or C. It runs on Linux, Windows and MacOS. The library supports extensive VNA calibration including SOLT, TRL, TXYZ (a.k.a...

I have a band-reject (notch filter) duplexer with low side at 462 MHz (transmitter) and high side at 467 MHz (receiver). I would like to learn on how to tune a duplexer, so I’ve watched many tutorials on the use of a VNA. What I am having a hard time understanding is why S21 is connected to the...