Model Fitting Wideband RF Transformers
This page shows simulations for Wideband Transformers and Baluns, both Flux-Coupled and Transmission-Line types, with measured S-Parameters from product datasheets from MACOM Technology Solutions. Some examples include 4-port data which allows us to fit a circuit model that includes both even and odd mode excitation (i.e., common and differential modes).
Model Fitting to Measured Data for 1:1 Transmission Line Baluns from MACOM. The resulting building block is used to simulate a 4:1 transformer as in a 1981 paper by Ersch Rotholz: