I am looking for models of transmission line transformer to simulate in SPICE or any other simulation app. I am interested in Guanella and Rotroff transformer.
First make a subcircuit of RLGC elements. Then string these together. To make things easier, make another subcircuit with ten of these in tandem. Then make another subcircuit with ten of these in tandem. A famous digital company uses this method for simulations.