High-frequency scattering by a conducting circular cylinder coated with a lossy dielectric of nonuniform thickness

Abstract

A closed-form expression for the field produced by a plane wave incident on an infinitely long conducting cylinder, coated with a lossy dielectric of nonuniform thickness, is obtained using perturbation theory. This approximate series solution is later evaluated asymptotically for electrically large cylinder sizes. The scattered fields are interpreted using geometric optics and creeping waves. The fields are calculated using the exact series, the approximate perturbation series, and the high-frequency asymptotic solutions, and compared for different angles of incidence.

Indirect modelling of the scattering from two‐dimensional composite uniaxial bianisotropic cylinders of arbitrary cross‐sections

“…On the other hand, a reduction in the CPU time used to invent the matrix of a large number of N can be achieved using the fast iterative scattering technique [21,22]. For electrically large cylinders, N should be chosen to be very large, and under such circumstances, the asymptotic technique of geometric optics must be adopted [23]. Furthermore, the far-zone scattered "elds in Figure 1 or Figure 2 are computed by using the large argument approximation of Hankel functions, and the corresponding formulations employed for determining of the co-polarized scattering cross section , or the co-polarized echo width can be found in Reference [7] or [10], respectively.…”

Scattering from Multiple Bianisotropic Cylinders and Their Modeling of Cylindrical Objects of Arbitrary Cross-Section

“…Therefore, for a large number of N a reduction in the CPU time for the matrix inversion can be achieved using the fast iterative scattering technique as shown as in [17,41,42]. On the other hand, for electrically large cylinders, N 0 should be chosen to be very large, and under such circumstance, the asymptotic technique of geometric optics must be adopted [5].…”

“…It is well known that the electromagnetic scattering of plane and beam waves by various composite cylindrical objects has long been studied by many authors [1][2][3][4][5][6][7][8], and these studies have been motivated both by interest in developing new techniques for solving scattering problems and by numerous engineering applications. For instance, many complex practical problems require a number of composite cylinders to model the scatter environment, improve and control the scattering properties in diverse areas like bioelectromagnetics, microwave remote sensing and imaging, and optical communication, et al The geometries of cylindrical objects treated before include dielectric or impedance cylinders embedded into another dielectric cylinder as well as two or N parallel conducting and dielectric cylinders.…”

An Integral Equation Formulation for Tm Scattering by a Conducting Cylinder Coated With an Inhomogeneous Dielectric/Magnetic Material

“…Other techniques such as the multifilament current model [37] and the on-surface radiation condition [38] have been proposed to treat the coated conducting cylinders. Several high frequency techniques have been devised for a dielectric coated conducting cylinders [39][40][41][42][43][44].…”