The propagation behaviour of a corrugated cylinder is considered with particular reference to the application of such structures to hybrid-mode feeds for large reflector antennas. Results are presented which relate to the design of narrow-flare-angle horns of circular cross-section. These include the parametric dependence of a number of special points on the propagation curves. A procedure for achieving a balanced hybrid condition in the horn aperture is discussed following the proposal made by Bryant.
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Clarricoats et al. (1969) studied this question.
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