Journal ArticleDOI
A TE/TM modal solution for rectangular hard waveguides
TLDR
In this article, a TE/TM modal solution for a longitudinally corrugated rectangular waveguide is developed, which can be used to achieve the hard boundary condition resulting in the quasi-TEM wave in a hard waveguide for discrete values of corrugation depth.Abstract:
A TE/TM modal solution for a longitudinally corrugated rectangular waveguide is developed. These longitudinal corrugations can be used to excite a quasi-TEM wave and form a hard waveguide by correctly choosing the impedance at the guide wall. The correctly chosen impedance is referred to as the hard boundary condition. The modal solution developed here solves the problem of longitudinal corrugations filled with a dielectric material by first finding and solving the characteristic equation for a complete TE/TM modal set. It is shown that this TE/TM mode solution can be used to achieve the hard boundary condition resulting in the quasi-TEM wave in a hard waveguide for discrete values of corrugation depth. Beyond each of these depths, a mode becomes a surface wave. The theoretical mode set is amenable to the solution of problems using the mode-matching method. A combination of the mode-matching method and the TE/TM modal solution will allow the solution of larger problems.read more
Citations
More filters
Asymptotic boundary conditions for strip-loaded and corrugated surfaces and waveguides
TL;DR: In this article, the unidirectional current screen was used as an asymptotic strip boundary condition (ASBC) for analysis of field problems containing metal strip grids.
Journal ArticleDOI
Cutoff Frequencies of a Dielectric-Loaded Rectangular Waveguide With Arbitrary Anisotropic Surface Impedance
TL;DR: In this paper, the cutoff frequencies of TE and TM waveguides with arbitrary wall impedance were derived for a rectangular waveguide bounded by periodic rectangular corrugations along the direction of mode propagation.
Journal ArticleDOI
Analysis of Circularly Polarized CTS Arrays
Michele Del Mastro,Francesco Foglia Manzillo,David Gonzalez-Ovejero,Maciej Smierzchalski,Philippe Pouliguen,Patrick Potier,Ronan Sauleau,Mauro Ettorre +7 more
TL;DR: In this article, a continuous transverse stub (CTS) antenna is proposed to achieve circular polarization using a single CTS array and without any polarization converter, where the structure consists of long radiating slots/stubs fed by over-moded parallelplate waveguides.
Journal ArticleDOI
A New Type of the Quasi-TEM Eigenmodes in a Rectangular Waveguide with One Corrugated Hard Wall
Sergei Skobelev,Per-Simon Kildal +1 more
TL;DR: In this article, the problem of determining the eigenmodes of a rectangular waveguide with one hard wall formed by longitudinal corrugations with grooves filled with dielectric is considered.
Proceedings Article
Analysis of global eigenmodes in an oversized rectangular waveguide with a hard surface on one broad wall for planar slot array antenna applications
Sergei Skobelev,Per-Simon Kildal +1 more
TL;DR: In this paper, the dispersion equation of a rectangular waveguide with one broad hard wall formed by longitudinal corrugations with grooves filled with dielectric is derived on the basis of using the asymptotic boundary conditions for corrugated surfaces.
References
More filters
Journal ArticleDOI
Rectangular Waveguides with Impedance Walls
R.B. Dybdal,L. Peters,W.H. Peake +2 more
TL;DR: In this article, the propagation of guided waves in a rectangular geometry having impedance boundary conditions is investigated and an impedance compatibility relation is derived that must be satisfied in order that a separable modal solution exists for a given impedance configuration.
Journal ArticleDOI
Asymptotic boundary condition for corrugated surfaces, and its application to scattering from circular cylinders with dielectric filled corrugations
TL;DR: In this paper, a simple asymptotic solution for periodic corrugated surfaces when the corrugation period approaches zero is presented, where the authors enforce an ACBC boundary condition between the region inside the CORRUGA and the outer region, after a simple expansion of the fields in the CORRAGE region.
Journal ArticleDOI
Bandwidth of a square hard horn
TL;DR: In this paper, the characteristic equation of a square hard waveguide is presented, and the crosspolar bandwidth is determined for a TEM wave at the design frequency, providing uniform aperture distribution and zero cross polarisation.
Journal ArticleDOI
Mode-matching modeling of a hard conical quasi-TEM horn realized by an EBG structure with strips and vias
Sergei Skobelev,Per-Simon Kildal +1 more
TL;DR: A conical horn with hard wall used for supporting the quasi-TEM-mode having a uniform field distribution over the cross section is modeled in this article where the hard wall is realized as an electromagnetic bandgap (EBG) structure using a dielectric layer loaded with narrow longitudinal strips connected to the basic metallic wall by radial vias to prevent excitation of the strip-line mode.
Journal ArticleDOI
Performance of an array of circular waveguides with strip-loaded dielectric hard walls
Sergei Skobelev,P.-S. Kildal +1 more
TL;DR: In this article, an infinite planar periodic antenna array of radiating open-ended circular waveguides is considered, where the waveguide walls are covered with dielectric layers loaded with longitudinal conducting strips for providing the hard wall boundary condition.