A. Z. ELSHERBENl

Bio: A. Z. ELSHERBENl is an academic researcher from University of Manitoba. The author has contributed to research in topics: Cylinder & Diffraction. The author has an hindex of 1, co-authored 1 publications receiving 8 citations.

Scattering by a double wedge and a parallel cylinder

Abstract: A simple technique for solving the problem of an E-polarized plane wave scattered by three objects consisting of two wedges and a cylinder is presented. The method is based on an extension of the Karp and Russek solution for the diffraction by a wide slit, and is applied here to investigate the transmission coefficient through the aperture of a wide double wedge in the presence of a circular dielectric or conducting cylinder whose axis is parallel to the edges of the two wedges. An improvement in the transmission coefficient is observed in the presence of a dielectric cylinder, whereas a conducting cylinder yields a lower transmission coefficient relative to the case when the cylinder is absent.

A comparative study of two-dimensional multiple scattering techniques

Abstract: The scattering of an electromagnetic plane wave from an arbitrary configuration of parallel circular cylinders is investigated using four different techniques. The cylinders are made of perfectly conducting or homogeneous dielectric material. These techniques are a boundary value type of solution, an iterative scattering procedure, a hybrid approach based on a combination of exact and method of moments solution, and a high-frequency asymptotic approximation. The analysis is given in detail for the transverse magnetic (TM) polarization, and that for the transverse electric (TE) polarization is outlined. Numerical results are provided to show the major differences between these techniques and the validity of using circular cylinders in modeling composite two-dimensional scatterers.

Scattering of Electromagnetic Plane Wave by a Perfectly Conducting Slit and a PEMC Parallel Cylinder

Abstract: Diffraction of a plane wave from a geometry which contains an infinite slit in a perfect electric conducting (PEC) plane and a perfectly electromagnetic conductor (PEMC) cylinder is presented. The method is based on the extension of Clemmow, Karp and Russek solution for the diffraction by a wide slit. The results are compared with the published work and agreement is fairly good.

Rigorous solution of the scattering by two multilayered dielectric cylinders

Abstract: In this paper the scattered field due to a plane wave incident on two parallel multilayered dielectric cylinders is derived using the boundary value approach. An asymptotic solution is also presented in which fictitious line sources located at the cylinder axes are used to account for the multiple interactions. For the sake of simplicity two layered-dielectric cylinders and two dielectridy coated conducting cylinders are investigated, however the solution can be easily extended to many layers as well as to many cylinders.

Diffraction by a wide double wedge with cylindrically capped edges

Abstract: The diffraction by two conducting sharp wedges with cylindrically capped edges is investigated using a recent asymptotic solution proposed by the authors for the diffraction by a wide double wedge. An E -polarized plane wave incident at any angle is considered and the cap is assumed to be either a conducting or dielectric cylinder whose axis coincides with the wedge edge and its radius is much less than the separation between the two virtual sharp edges. The effects of the cap radius, permittivity, and wedge angle on the diffraction pattern, transmission coefficient, and edge-edge interaction term are presented. The transmission coefficient of the aperture is increased over the uncapped wedge case for dielectric caps and decreased for conducting caps. Other effects of the caps on the diffraction pattern such as beamwidth, level, and position of the first sidelobe are also investigated.

Asymptotic Scattering of Electromagnetic Waves from an Array of Dielectrically Loaded Conducting Strips

Abstract: A rigorous field analysis of the electromagnetic scattering from a perfectly conducting strip loaded with a dielectric cylinder is presented. The dielectric cylinder is of circular cross-section and the dielectric medium is assumed to be linear, homogeneous, and isotropic. The strip is oriented radially with respect to the center of the cylinder and can be located inside or outside, but touching, the outer boundary of the cylinder. The structure is excited by a plane wave or a line current field and both TM and TE to z excitations are considered. The solution of the scattering from a single loaded strip is based on a boundary value approach and a high frequency asymptotic technique is also developed for the scattering from an array of loaded strips. The validity of this proposed solution is investigated by comparing the numerical results of selected cases with those based on exact and method of moments solutions. Sample numerical results for the scattering from a single loaded strip and an array of loaded...