SFELP - An efficient methodology for microwave circuit analysis

A hybrid method based on the Segmentation technique, the Finite-Element met hod, and a Matrix Lanczos-Pade algorithm (SFELP) for the analysis of microw ave circuits is introduced in this paper. This method computes Symmetric ma trix-Pade approximations of a matrix transfer function for any number of in puts and outputs via a Lanczos-type process (SyMPVL) for obtaining the gene ralized admittance matrix of a microwave circuit on a wide band of frequenc ies. The formulation that provides the three-dimensional finite-element/seg mentation method is suitable for applying the symmetric Fade via Lanczos al gorithm, except for the frequency dependence Of the matrix of excitation ve ctors, In this paper, this problem is analytically overcome for the case in which excitation vectors correspond to modes of homogeneous waveguides or transmission lines, The accuracy and efficiency of the proposed method are shown by means of different examples.