A New Type of the Quasi-TEM Eigenmodes in a Rectangular Waveguide with One Corrugated Hard Wall
Sergei Skobelev,Per-Simon Kildal +1 more
TLDR
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.Abstract:
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. The characteristic equation is derived by using the asymptotic boundary conditions for corrugated surfaces. It is shown analytically that if the groove depth is equal to the value 0.25 lambda/(epsilon - 1)(1/2) corresponding to the hard wall condition, the TE eigenmode spectrum of the waveguide contains an infinite set of new non-uniform quasi-TEM modes with different transverse propagation constants in the empty part and identical longitudinal propagation constants equal to the wavenumber k. Analytical solution for the case of excitation of the waveguide by a specified source is given, and an example of forming local quasi-TEM waves is considered and discussed.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
Substrate integrated waveguide (SIW) filter with hexagonal resonator
TL;DR: In this article, a novel substrate integrated waveguide (SIW) hexagonal resonator structure and its applications to bandpass filters are presented based on the SIW techniques, the resonance characteristic of proposed resonator is investigated.
Journal ArticleDOI
Controlled radiation from dielectric slabs over spoof surface plasmon waveguides
TL;DR: In this article, the radiation characteristics of dielectric slabs over a transmission waveguide, based on the concept of spoof surface plasmons, are studied in a wide band of operation, whilst retaining low SLLs and cross-polarization.
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
Analytical Dispersion Characteristic of a Gap-Groove Waveguide
TL;DR: In this article, a gap-groove waveguide based on the concept of a groove on a metal, facing an artiflcial surface which creates a high impedance surface (HIS) boundary condition is proposed.
References
More filters
Book
Advanced engineering electromagnetics
TL;DR: In this article, the authors introduce the notion of circular cross-section waveguides and cavities, and the moment method is used to compute the wave propagation and polarization.
Journal ArticleDOI
Local Metamaterial-Based Waveguides in Gaps Between Parallel Metal Plates
TL;DR: The ridge gap waveguide as mentioned in this paper is a metamaterial-based waveguide that can be realized in a narrow gap between two parallel metal plates by using a texture or multilayer structure on one of the surfaces.
Journal ArticleDOI
Artificially soft and hard surfaces in electromagnetics
TL;DR: In this paper, the concept of soft and hard surfaces is treated in detail, considering different geometries, and it is shown that both the hard and soft boundaries have the advantage of a polarizationindependent reflection coefficient for geometrical optics ray fields, so that a circularly polarized wave is circularly polarization in the same sense after reflection.
Journal ArticleDOI
Definition of artificially soft and hard surfaces for electromagnetic waves
TL;DR: The widely used transversely corrugated surfaces and other alternative surfaces having the same anisotropic surface impedance deserve a common name as discussed by the authors, and it is proposed to call them soft surfaces by analogy with the soft surfaces in acoustics.
Journal ArticleDOI
Efficiency of 76-GHz post-wall waveguide-fed parallel-plate slot arrays
Jiro Hirokawa,Makoto Ando +1 more
TL;DR: In this article, a post-wall waveguide-fed parallel-plate slot array is designed and fabricated for various sizes of 76-GHz post wall waveguide and achieved 40-50% efficiency with 35.3 dBi gain with 39.3% efficiency at 77.0 GHz at 104 mm/spl times/100 mm.
Related Papers (5)
Performance of an array of circular waveguides with strip-loaded dielectric hard walls
Sergei Skobelev,P.-S. Kildal +1 more