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Finite-Element Analysis of Waveguide Modes: A Novel Approach that Eliminates Spurious Modes

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3 Author(s)

An efficient finite-element method for analyzing the propagation characteristics of a wide variety of waveguides is presented. A variational expression suited for the finite-element method is formulated in terms of the transverse electric and magnetic field components. In this approach all guided-mode solutions are real, while the spurious-mode solutions are not real. Therefore, discrimination of the spurious-mode solutions can be achieved merely by imposing the simple condition that guided-mode solutions be real. Three numerical examples, two for the isotropic case and the other for the magnetic anisotropic case, are carried out.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:35 ,  Issue: 2 )

Date of Publication:

Feb 1987

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