MODIFIED ANALYSIS OF CONICAL HORNS

A modified analysis of conical hems is presented that takes into accou nt the true phase relationships between the feeding waveguide, the con ical horn section, and the aperture phase variation. It is demonstrate d that, especially for low-gain applications, an accurate account of t he aperture phase error results in higher gains than those obtained by widely used design methods-or that a slightly shorter horn is obtaine d for identical gain specifications. Comparisons with measured data re veal the advantage of this relatively simple analysis compared with te chniques involving the conical waveguide mode spectrum. (C) 1995 John Wiley & Sons, Inc.