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Asymptotic boundary conditions for strip-loaded and corrugated surfaces and waveguides
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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.Abstract:
We discuss the unidirectional current screen as an asymptotic strip boundary condition (ASBC) for analysis of field problems containing metal strip grids, and we introduce a related asymptotic corrugation boundary condition (ACBC) for analysis of corrugated surfaces. The boundary conditions are asymptotic in the sense that the exact boundary conditions approach the asymptotic ones when the strip and corrugation periods approach zero. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 14: 99–101, 1997.read more
Citations
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Journal ArticleDOI
Modal Analysis of Corrugated Plasmonic Rods for the Study of Field Localization, Conductor Attenuation, and Dielectric Losses
Malcolm Ng Mou Kehn,Jen Yung Li +1 more
TL;DR: In this paper, an analytical modal method for treating transverse corrugated conducting rods with generally dielectric-filled grooves is presented, which offers rapid yet accurate surface-wave modal solutions.
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.
Journal ArticleDOI
Some features of hard strip-loaded conical horn antennas
S.P. Skobelev,P.-S. Kildal +1 more
TL;DR: In this article, a hard strip-loaded conical horn antenna using the generalised scattering matrix method was used to obtain numerical results of the horn aperture efficiency with an amplitude of around 10% when changing the horn length or operating frequency.
Proceedings ArticleDOI
Theoretical study of the corrugated hard horn used as feed in multi-beam antennas for dual band operation at 20/30 GHz
TL;DR: In this paper, it was shown that in a cluster-fed reflector, a normal single-tuned hard horn can satisfy the usual -25 dB system requirements for the cross polarization over a large frequency band, but it cannot completely satisfy the requirements for copolar level in the neighboring beam.
Journal ArticleDOI
Study of High-Efficiency Corrugated Hard-Horn Antennas Using Classical Approaches: Hard Circular Waveguide Mode, Phase Factor, and Aperture Integration
TL;DR: In this paper, a classical-type approach is used to analyze the hard horn antenna and the quasi-TEM mode in the longitudinally corrugated cylindrical waveguide is found by using the homogenized asymptotic boundary conditions.
References
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Impedance boundary conditions for imperfectly conducting surfaces
TL;DR: In this article, the exact electromagnetic boundary conditions at the surface of a material of large refractive index can be approximated to yield the usual impedance or Leontovich boundary conditions, which are valid for surfaces whose radii of curvature are large compared with the penetration depth.
Proceedings Article
Three metamaterial-based gap waveguides between parallel metal plates for mm/submm waves
TL;DR: In this article, the basic ideas of how local waveguides and transmission lines can be designed to propagate along desired paths in the air gap between two metal surfaces are presented, related to the performance of artificial magnetic conductors, EBG surfaces and soft and hard surfaces.
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Dispersion Characteristics of a Metamaterial-Based Parallel-Plate Ridge Gap Waveguide Realized by Bed of Nails
TL;DR: In this paper, an approximate analytical solution for this confined quasi-TEM dominant mode of the ridge gap waveguide, when the metamaterial surface is an artificial magnetic conductor in the form of a bed of nails, is presented.
Journal ArticleDOI
Construction of Green's functions of parallel plates with periodic texture with application to gap waveguides - a plane-wave spectral-domain approach
TL;DR: In this paper, the dispersion characteristics of the quasi-transverse electromagnetic modes that propagate along the ridges or strips, including their lower and upper cut-off frequencies, were investigated.
Journal ArticleDOI
Electromagnetic scattering from conducting circular cylinder coated by meta-materials and loaded with helical strips under oblique incidence
L.K. Hady,Ahmed A. Kishk +1 more
TL;DR: In this article, the asymptotic strip boundary condition (ASBC) is applied to analyze the solution of the electromagnetic scattering from a conducting cylinder coated with a homogeneous linear material layer and loaded with conducting helical strips.