Analytical calculation of transformer parameters by S-parameters

This paper proposed a new methodology and dedicated algorithm to extract the parameters of transformer from S-parameters by Vector Network Analyzer (VNA) measurement. Analytical expressions of S parameters are deduced for each transformer parameter including basic and parasitic parameters based on the interconnection and transformation theory between Y/ABCD/S parameters of the optimized equivalent circuit of transformer. The analytical calculation is also verified by circuit simulation with high accuracy (<;0.6% deviation).