Title :
Boundary-element analysis of planar circulators: a discussion on spurious solutions and their elimination
Author_Institution :
Dipartimento di Elettronica e Informazione, Politecnico di Milano, Italy
Abstract :
Some results on the application of the Boundary-Element Method to the computation of the scattering parameters of planar circulators also working in the region /spl mu//sub eff/<0 are presented. Spurious solutions are first pointed out, and two different ways to eliminate them are discussed. The analysis supports Schroeder´s explanation of the appearance of spurious modes in integral equation techniques. Extensive numerical simulations are presented to validate the formulation proposed.<>
Keywords :
S-parameters; boundary-elements methods; circulators; network analysis; boundary-element analysis; integral equation techniques; numerical simulations; planar circulators; scattering parameters; spurious solutions; Anisotropic magnetoresistance; Circulators; Dielectric substrates; Ferrites; Integral equations; Microstrip; Microwave circuits; Planar waveguides; Stripline; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
