AndreaGoldstein
Newbie level 3
Convert S11 INTO S21 graph for filter passband sweeps?
Why would I want to do such a thing if I had a shiny new VNA? Because I don't have a shiny new VNA. I took a very early retirement from the Valley (burnout) and I only have a vector antenna analyzer (which is basically just a single port network analyzer). The reason why I think this is even possible is that I, and any other engineer (retired or not), can gauge the filter's passband by eye just by looking at its return loss. Is there a conversion program for this?
Am I barking up the wrong tree, or is a graphic conversion possible in, say, Excel? :thinker:
(FYI: To obtain the S11 of a passive device with an antenna analyzer is somewhat similar to using a regular two-port VNA: attach the analyzer's (single) port to the filter's "input", and then terminate the filter's "output" (with either a 51 ohm resistor or a connectorized 50 ohm termination.)
Thank you,
-Andrea
Why would I want to do such a thing if I had a shiny new VNA? Because I don't have a shiny new VNA. I took a very early retirement from the Valley (burnout) and I only have a vector antenna analyzer (which is basically just a single port network analyzer). The reason why I think this is even possible is that I, and any other engineer (retired or not), can gauge the filter's passband by eye just by looking at its return loss. Is there a conversion program for this?
Am I barking up the wrong tree, or is a graphic conversion possible in, say, Excel? :thinker:
(FYI: To obtain the S11 of a passive device with an antenna analyzer is somewhat similar to using a regular two-port VNA: attach the analyzer's (single) port to the filter's "input", and then terminate the filter's "output" (with either a 51 ohm resistor or a connectorized 50 ohm termination.)
Thank you,
-Andrea