Abstract
In this paper the Finite Element Method is employed for the analysis of electromagnetic lossless waveguides. The curl-curl equation, deduced from Maxwell's equations, is solved for the electric field. We have studied the appearance of parasitic solutions and formulated a sufficient condition for their elimination which puts a contraint on the Finite Element spaces for the approximation of the field components. A new family of discontinuous exponential infinite elements is proposed for the analysis of open waveguides: they are employed together with edge elements and a non-linear eigenvalue problem is deduced. We have presented numerical results in order to prove the validity of such infinite elements versus the Virtual Boundary Technique.
Published Version
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