2022
DOI: 10.1109/ted.2022.3170279
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Dispersion Curve of the Helically Corrugated Waveguide Based on Helicoidal Coordinate Transform

Liang Zhang,
Jack Easton,
Craig R. Donaldson
et al.

Abstract: This paper presents the dispersion curve study of the helically corrugated waveguide using the 2D Finite Element Method (FEM) method based on the helicoidal coordinate transform. Calculation of the dispersion curve is 60 times faster compared with 3D FEM simulation while maintaining similar accuracy. The 2D method was used to investigate the relative error between it and a 1D analytical method based on perturbation theory. Over a narrow parametric range, the 1D method has a similar dispersion (within a relativ… Show more

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