Multiple Scattering by an Array of Finite Cylindrically Curved Thin Screens
نویسنده
چکیده
The electromagnetic scattering by an array of finite cylindrically curved thin screens is investigated in this paper, and the normally incident plane wave can be either TMzor TEz-polarised. The mathematical treatment here is based on the direct integral equation technique combined with the Galerkin's procedure, and the induced currents on the curved thin screens or apertures are expanded in terms of a series of Chebyshev polynomials of the first kind. Furthermore, the far-zone field solutions to such a multiple coupling system are obtained in an analytical form, and parametric calculations are performed to show the variation of the scattered far-zone field distributions at both TMzand TEz-polarisation incidences.
منابع مشابه
High-Frequency Solution for Scattered Fields by Cylindrically Curved Conducting Surface
1. INTRODUCTION Recently, the studies on the scattering of electromagnetic waves by a cylindrically curved conducting open surface are becoming an important subject for a variety of applications [1]-[4]. When the geometrical ray or the creeping wave is incident on the edge of the cylindrically curved conducting open surface, the geometrical rays and the whispering gallery modes, which cling to ...
متن کاملCurved infrared screens.
We address curved IR screens for multiwavelength systems. To first-order of the approximation, a curved screen may be viewed as composed of many local flat screens. On the other hand, the validity of such an approximation is not clear a priori. We provide experiments and simulations to show that such an approximation works well for cylindrically curved IR screens while monitoring their peak tra...
متن کاملHigh Frequency Scattering by a Second- Order Generalized Impedance Discontinuity on a Cylindrically Curved Surface
The aim of the present paper is to obtain explicit asymptotic expressions for the “transfer (diffraction) coefficients” related to the diffraction of high frequency cylindrical waves from the discontinuity occurred in the material properties as well as in the thicknesses of a coated cylindrically curved metallic sheet characterized by the second order GIBCs. Relying on the locality of the high ...
متن کاملUltimate Load Capacity and Behavior of Thin-Walled Curved-Steel Square Struts, Subjected to Compressive Load
There have been some experimental tests on hollow curved-steel struts with thin-walled square sections, in order to investigate their general behavior, particularly their capacity for bearing differing loads. One set of square tubes are cold-formed into segments of circular arcs with curvature radii, equal to 4000 mm. Different lengths of curved struts are fabricated so as to cover a practical ...
متن کاملTheoretical Analysis of the Optical Properties of Gold Nanoparticles Using DDA Approximation
This article describes a study, using numerical simulation, of the optical properties of nano particles as a function of their size. Many methods introduced to simulate and calculate the interaction of light and particle, such as Mie analysis, boundary element and finite element methods. The Discrete Dipole Approximation (DDA), wherein a target geometry is modeled as a ...
متن کامل