Fields of a curved plasma layer excited by a slot

An analysis of the fields of a plasma coated conducting cylinder of infinite extent, excited by an infinite axial slot, is presented for large radius cylinders. The saddle point evaluation of the radiation fields is discussed for uniform low-loss plasma layers of arbitrary thickness and index of refraction. Patterns are presented and compared with the flat layer case, and the effect of the curvature on the pattern is discussed. The residue series evaluation is considered and a method of determining the poles is discussed. The locus of the first pole for thin lossless dielectric layers is presented and the transition from leaky waves to surface waves is discussed as a function of the dielectric constant and radius of curvature.