Surface currents and charges on an electrically thick and long conducting tube in E- and H-polarized, normally incident, plane-wave fields

摘要

Recent work on the theoretical and experimental determination of the distributions of surface currents and charges induced on an electrically thick tubular cylinder with the resonant electrical half-length kh = 1.5π by an E-polarized field is extended to electrically quite long tubes excited by both E- and H-polarized plane-wave fields. A simple approximate analytical representation of the currents and charges is described in terms of forced and resonant transverse Fourier components for cylinders with lengths not restricted to those that are axially resonant. Extensive theoretical and measured graphs and contour diagrams of the distributions of current and charge density are displayed and compared specifically for tubes with the electrical radius ka = 1 and lengths up to kh = 3.5π.