ELECTROMAGNETIC-WAVE PROPAGATION OVER A ROTATING DIELECTRIC CYLINDER

The problem of guided electromagnetic-wave propagation over a rotating dielectric cylinder is solved by a boundary-value method assuming that the speed of rotation is much smaller than the velocity of light. From a numerical solution of the complex characteristic equation, the variation of the attenuation and the phase constants and their dependence on the speed of rotation are studied. The rotational process appears to divide the radial propagation constant inside a stationary cylinder into two waves with different propagation constants. The modes with positive and negative indices in the circumferential direction cease to be degenerate in the case of a rotating dielectric cylinder, and there appears to be a decrease in the attenuation with an increased speed of rotation for the dominant mode.