Title :
Do covariant projection elements really satisfy the inclusion condition?
Author :
Saorsi, S. ; Fernandes, P. ; Raffetto, M.
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
fDate :
9/1/1997 12:00:00 AM
Abstract :
Spurious modes which often are found among finite-element solutions of electromagnetic eigenvalue problems do not occur when covariant projection elements are used. It has been claimed that this happens because covariant projection elements satisfy the inclusion condition, but they do not satisfy it-as is proven in this paper
Keywords :
eigenvalues and eigenfunctions; finite element analysis; waveguide theory; covariant projection elements; electromagnetic eigenvalue problems; finite-element solutions; inclusion condition; spurious modes; waveguide theory; Counting circuits; Eigenvalues and eigenfunctions; Electromagnetic waveguides; Finite element methods; Lagrangian functions; Pollution; Sufficient conditions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
