Current behavior on a perfectly conducting cylinder with a delta-gap excitation in an anisotropic medium

The current behavior on an infinitely long, perfectly conducting, circular cylinder immersed in a uniform magnetoplasma, in which the superimposed static magnetic field is parallel to the axis of the cylinder, is studied. The currents on the cylinder are excited by the delta-gap source with the given time-harmonic voltage. A rigorous representation is obtained for the current distribution on the cylinder. Generally, the surface current on the cylinder can consist of a bound (proper) mode and improper radiation modes which constitute a continuous-spectrum part of the current. The current distribution along a cylinder whose radius varies gradually with distance from the feed gap is also analyzed.