Title :
Finite element analysis of multiport filters using perfectly matched layers
Author :
Groiss, S. ; Bardi, Istvan ; Biro, O. ; Preis, K. ; Richter, K.R.
Author_Institution :
IGTE, Tech. Univ. Graz, Austria
fDate :
3/1/1997 12:00:00 AM
Abstract :
A 3D edge finite element analysis is presented to calculate the resonance frequencies and quality factors of inhomogeneously loaded cavity resonators (filters) terminated by waveguides (ports). The matching of the ports is modeled by perfectly matched layers (PML). The selection of the PML parameters is discussed. A complex nonlinear eigenvalue problem is obtained which is solved by a special solver with the sparsity of the matrices fully utilized. An approximation is applied to reconstruct the frequency response of the scattering parameters from the field calculated at the resonance frequencies.
Keywords :
Q-factor; S-parameters; cavity resonators; eigenvalues and eigenfunctions; finite element analysis; frequency response; impedance matching; multiport networks; sparse matrices; 3D finite element analysis; PML parameters; approximation; complex nonlinear eigenvalue problem; field; frequency response; impedance matching; inhomogeneously loaded cavity resonators; multiport filters; perfectly matched layers; ports matching; quality factors; resonance frequencies; scattering parameters; sparse matrices; waveguide loaded lossy cavity; waveguides; Cavity resonators; Eigenvalues and eigenfunctions; Finite element methods; Frequency response; Perfectly matched layers; Q factor; Resonance; Resonant frequency; Resonator filters; Transmission line matrix methods;
Journal_Title :
Magnetics, IEEE Transactions on
