CURRENTS INDUCED ON THE SURFACE OF A CONDUCTING CIRCULAR CYLINDER BY A SLOT

Abstract

Abstract : A partial study of currents induce on circular, conducting cylinders by narrow radiating slots is made. irst a brief and general formulation of the radiation fields of slots on cylinders is made. Then, the p radius, and the order of the errors are discussed. The problem of a circumferential slot, of constant excitation, is also considered. An asymptotic expansion obtained for this case yields the surface current distribution for values f axial distances that oblem of an infinite axial slot is examined thoroughly for all cylinder sizes. An expansion for the fields, very close to the slot, on large radius cylinders, is also obtained. Sample computations are made, for various ranges of cylinder radius, and the order of the errors are discussed. The problem of a circumferential slot, of constant excitation, is also considered. An asymptotic expansion obtained for this case yields the surface current distribution for values f axial distances that are smaller than the square of the circumference o the cylinder. Since one of the objectives of this study is to determine m tual coupling between two slots on a cylinder, the last section presents a formulation o the equivalent netw rk in terms of the surface and feed line currents. (Author 0