The paper discusses the effects of interactions in a multifrequency coaxial horn on both feed and antenna performance. A proper design of each radiating aperture including a corrugated flange allows us to control the mutual effects due to external structures. The performance improvement is described through the measurements of the feed properties and the analysis of the antenna characteristics based on the measured primary patterns. The results described are inherent to the QUASAT feed designed for a front-fed parabolic reflector operating at 1.6, 5, 22 GHz. Over frequency bandwidths between 15% and 20% the antenna efficiency (%) results better than 72.2, 71.1, 70.6 and the cross-polar peak level (dB) lower than -28.8, -29 and -33.2 at 1.6, 5, 22 GHz respectively.
|Number of pages||6|
|Journal||CSELT technical reports|
|Publication status||Published - 1 Feb 1989|