An Easy-to-Fabricate Circular TE₂₁/TE₀₁ Mode Generator

Advanced Modeling of Rectangular Waveguide Devices With Smooth Profiles by Hierarchical Model Reduction

“…Now, to simplify the notation, we will no longer distinguish between the transverse modal fields of type TE or TM in the HiMod expansion (9), ordering the modes by using a single index, n, that runs from 1 to N M = N TE + N TM . Hence, the electric field expansions in ( 9), (10), taking into account the FE representations in (12), (13), can be rewritten as…”

“…transitions between dissimilar rectangular waveguides [10], [11], mode converters [12], [13], pyramidal horns [14], [15], twists, and bends [16], represent an ideal environment for the application of a HiMod approach. Classic approaches that deal with this problem are based on the Mode-Matching (MM) technique [14], or on solving the three-dimensional (3D) Maxwell equations in the taper using the Finite Element Method (FEM) [13].…”

“…transitions between dissimilar rectangular waveguides [10], [11], mode converters [12], [13], pyramidal horns [14], [15], twists, and bends [16], represent an ideal environment for the application of a HiMod approach. Classic approaches that deal with this problem are based on the Mode-Matching (MM) technique [14], or on solving the three-dimensional (3D) Maxwell equations in the taper using the Finite Element Method (FEM) [13]. On the one hand, the extremely efficient MM technique loses efficiency when dealing with smooth walled tapers due to the need of representing the domain geometry with a large number of steps, thereby increasing the computational time and introducing an undesired geometry approximation.…”