Analysis and Synthesis of Corrugated Conical Horns

The characteristics of corrugated conical horns, radiating the balanced hybrid mode HE11 have been summarized in a number of linear curves giving the beam width at different levels versus the horn flare angle (2¿) and versus the radius of the horn aperture, normalized to the wavelength (¿ = r/¿). Moreover the feed horn performance for single or double reflectors antennas, have been analysed and curves are presented for the antenna illumination efficiency (aperture efficiency by spillover efficiency) versus parameters d and a. All the curves reported are a useful basis for the antenna design and give a fast and accurate solution to the following problems: - synthesis of a corrugated conical horn with a specified amplitude radiation pattern - synthesis of a corrugated conical horn as a function of the antenna illumination efficiency.