Abstract
Electromagnetic (EM) scattering by finite-length, perfectly conducting open cylinders (i.e., ducts or tubes) with circular cross sections is considered. The case of a straight wire, viewed as a thin cylinder, is examined in this context. The salient features of this study are a) use of the electric field integral equation (EFIE) as a starting point, b) solution of this equation by the Galerkin method, and c) representation of the axial variation of the currents on the scatterer by an entire domain (Fourier series) expansion. Edge modes are considered in the expansion set and their effect is examined. The open cylinder backscatter cross section is computed as a function of aspect angle for various radii and lengths and is compared with measured data.
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