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A simple mixed triangular edge element is proposed for the finite elements, with which inhomogeneously-loaded and arbitrarily shaped waveguides are analyzed. The shape functions used for approximating the fields are found analytically to be divergence-free. The formulation has been found to encounter spurious-free solutions. As evidence, the non-physical solutions that appeared in the longitudinal component finite element formulation are shown to be absent in the present formulation. A comparison with another mixed element is furnished here in order to demonstrate the advantages provided by the present element
finite element analysis
Digital Object Identifier: 10.1109/20.582544
Published with permission from the copyright holder. This is the institute's copy, as published in Magnetics, IEEE Transactions on, March 1997, Volume 33, Issue 2, Part 2, Pages 1496-1499.
Copyright © 1997 IEEE. All rights reserved.