The radiation field produced by a slot in a large circular cylinder

General results obtained previously by Silver and Saunders for slots of arbitrary shape are applied to the cases of narrow-width half-wavelength slots oriented transverse and parallel to the axis of infinite cylinders with fairly large radii. Sufficient theoretical data are given to describe accurately the major portion of the three-dimensional pattern of both the principal and cross-polarized components of the radiation fields of these slots. Perfectly conducting cylinders of circumferences of 8 and 12 wavelengths are considered.