Single- and dual-band multimode hard horn antennas with partly corrugated walls

• Published in: IEEE transactions on antennas and propagation Vol. 54; no. 2; pp. 330 - 339
• Main Authors: Sotoudeh, O., Kildal, P.-S., Ingvarson, P., Skobelev, S.P.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-02-2006; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna accessories; Antenna feeds; Antennas; Apertures; Arrayed waveguide gratings; Cluster feed; Corrugating; Dual band; feed; Frequency; hard horn; High gain; Horn antennas; Horns; Ka-band; multibeam antenna; multimode horn; reflector antenna; Reflector antennas; Space technology; Surface waves; Throats; Walls
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2005.863389

We introduce a partly corrugated hard horn, consisting of a smooth-walled horn with an attached longitudinally corrugated outer section. This alleviates the problems with the manufacturing when the longitudinal corrugations extend into the throat of the horn. The transition between the inner smooth walled part and the outer corrugated part is abrupt. This is used and controlled to design better and shorter single-band horns than otherwise possible. Furthermore, it enables the design of dual-band horns with low cross-polarization and high gain, for multifunction use at Ka-band with transmit and receive frequencies in the same antenna. Measurements on a model of such a dual-band horn are presented and discussed.