I need to obtain S11 and S21 to calculate loss tangent of polymer(PVDF) in C-band. I have an access to vector network analyzer, to use it I must somehow attach 2 SMA connectors to polymer and here starts the hard part. Polymer film is roughly 0.1 mm thick with aluminium coating on both sides(around 100 nm thick). Melting temperature of PVDF is 175 degrees C so I can't solder something directly to film. At first I thought that I can just take PCB, solder one SMA to it and glue film to board with second SMA glued to top side of film (with conducting glue). But it wont work correctly because of amount of places where waves will reflect because of glue. Some additional info you should know:
- I can't use cavity perturbation method.
- I only have this film. I can't obtain this polymer in other form.
- I can remove aluminium from film where needed by using PCB marker and ferric chloride.
- I can cut the film, I think square shape will be the best solution to ease further calculations.
So you can imagine it as square thin film capacitor. Any ideas?