Dispersion and Filtering Properties of Rectangular Waveguides Loaded With Holey Structures

This article analyzes thoroughly the dispersion and filtering features of periodic holey waveguides in the millimeter-wave frequency range. Two structures are mainly studied depending on the glide and mirror symmetries of the holes. A parametric study of the dispersion characteristics of their unit...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2020-12, Vol.68 (12), p.5132-5144
Main Authors: Palomares-Caballero, Angel, Alex-Amor, Antonio, Padilla, Pablo, Valenzuela-Valdes, Juan F.
Format: Article
Language:English
Subjects:
Configurations
Dispersion
Filter
Filter design (mathematics)
Frequency ranges
gap waveguide
glide symmetry
hollow waveguide
Hollow waveguides
low dispersion
Millimeter waves
millimeter-wave
mirror symmetry
Mirrors
multimodal (M-M) transfer matrix
periodic holey structures
Periodic structures
phase shifter
Phase shifters
Rectangular waveguides
Wave attenuation
Wave propagation
Waveguide discontinuities
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This article analyzes thoroughly the dispersion and filtering features of periodic holey waveguides in the millimeter-wave frequency range. Two structures are mainly studied depending on the glide and mirror symmetries of the holes. A parametric study of the dispersion characteristics of their unit cells is carried out. Glide-symmetric holey waveguides provide a higher propagation constant and a low dispersion over a wide frequency range regarding hollow waveguides. This property is particularly useful for the design of low-loss and low-dispersive phase shifters. We also demonstrate that glide-symmetric holey waveguides are less dispersive than waveguides loaded with glide-symmetric pins. Furthermore, we perform a Bloch analysis to compute the attenuation constants in holey waveguides with mirror and broken glide symmetries. Both configurations are demonstrated to be suitable for filter design. Finally, the simulation results are validated with two prototypes in gap-waveguide technology. The first one is a 180° phase shifter based on a glide-symmetric holey configuration that achieves a flat phase shift response over a wide frequency range (27.5% frequency bandwidth). The second one is a filter based on a mirror-symmetric holey structure with a 20-dB rejection from 63 to 75 GHz.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2020.3021087