Did some dicking about with the VNA today and tested the rf coupler i built. Not sure how i interpret the data, but i have it LOL
The through port return loss. I figure what this means is from 1 to 100meg the through port has a quite flat frequency response.
Port Isolation. I figure what this means is i have a coupling factor of say -18db or near enough. I might have to rebuild it with some more turns, I was looking for at least 30.
Ok, it made RF before I broke it. Not a serious break, one of the trimmers failed and I cannot set the bias to the right hand bank. Going to be a bit of a job to pull it apart and remove the dead trimmer, thinking about it now, I really should have used SMD parts for everything that I could on the board to make fixing things like this easy. Will see how i go tomorrow when i dissemble it LOL