Title :
Analysis of Dispersion and Losses in Helically Corrugated Metallic Waveguides by 2-D Vector Finite-Element Method
Author :
Mishakin, Sergey V. ; Samsonov, Sergey V.
Author_Institution :
Inst. of Appl. Phys., Russian Acad. of Sci. (RAS), Nizhny Novgorod, Russia
Abstract :
Hollow metallic circular waveguides with helical corrugation of the inner surface (helical waveguides) attract considerable interest for various applications such as interaction regions in gyrotron traveling-wave tubes and as a dispersive medium for passive microwave pulse compression. In this paper, we employ a vector finite-element method in 2-D formulation for computation of the dispersion, attenuation characteristics, and the distribution of electromagnetic fields of eigenwaves of helical waveguides. As shown by comparison with the results of previously performed 3-D calculations, the presented method provides sufficient accuracy of calculating the characteristics of helical waveguides for a number of practically important cases at much lesser consumption of computer resources.
Keywords :
circular waveguides; finite element analysis; helical waveguides; 2D formulation; 2D vector finite-element method; 3D calculation; computer resource; dispersion analysis; dispersive medium; eigenwave electromagnetic field distribution; gyrotron traveling-wave tube; helical corrugated metallic waveguide; hollow metallic circular waveguide; loss analysis; passive microwave pulse compression; Boundary conditions; Dispersion; Finite element methods; Optical waveguides; Surface waves; Transmission line matrix methods; Eigenmodes; finite-element methods (FEM); helical waveguides; irregular waveguides;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2011.2160201
