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Asymptotic boundary conditions for strip-loaded and corrugated surfaces and waveguides
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TLDR
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
Usability Studies on Approximate Corrugation Models in Scattering Analysis
TL;DR: In this article, a planewave scattering from partially corrugated structures is studied based on integral equations (IE) and method of moments (MoM) and the analysis is based on two-dimensional geometry and fields.
Proceedings ArticleDOI
Asymptotic boundary conditions for strip-loaded surfaces of cylindrical structures with arbitrarily shaped cross-section
Ahmed A. Kishk,P.-S. Kildal +1 more
TL;DR: In this paper, the applications of the asymptotic strip boundary conditions to arbitrarily shaped cylindrical structures by using the method of moments are discussed, where the echo widths of a circular dielectric cylinder loaded with transverse periodic strips due to an oblique plane wave incidence is computed.
Proceedings ArticleDOI
Mushroom surface cloaks for making struts invisible
P.-S. Kildal,Eva Rajo-Iglesias +1 more
TL;DR: In this paper, the authors derived the equivalent blockage width by considering a plane wave incident on an infinitely long strut, which is a two-dimensional scattering problem, and treated for simplicity only normally incident plane waves.
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.
Journal ArticleDOI
Asymptotic strip boundary condition in the finite difference time domain method
A. E. Simon,Ahmed A. Kishk +1 more
TL;DR: In this article, the authors proposed the asymptotic strip boundary condition (ASBC) approach to treat finite extent periodic structures of strips loading dielectric materials in the finite-difference time-domain method.
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.
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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.