Efficient analysis of multiport passive circuits using the iterative technique

This article presents an efficient implementation of an iterative method th at includes fast mode transformations (FMTs). This method has the advantage of simplicity in that it does not involve basis functions and inversion of matrices, as used in other calculation methods. Therefore, it is capable o f analyzing larger bodies than other classical techniques. An implementatio n of the iterative calculation is shown for the extraction of S parameters of unbounded multiport microstrip passive circuits. The good agreement betw een simulation results and experimental data (Zhu & Wu, 1997) justifies the design procedure and validates the present analysis approach.