A novel horn radiator with high aperture efficiency and low cross-polarization and applications in arrays and multibeam reflector antennas

A step horn structure is presented that yields about 90% aperture efficiency with low cross-polar radiation. It is found that for obtaining high aperture efficiency, the horn aperture should consist of only the TE/sub z/ type of modes in appropriate amplitudes and phases. The desired TE/sub z/ modes...

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Veröffentlicht in:	IEEE transactions on antennas and propagation 2004-11, Vol.52 (11), p.2850-2859
Hauptverfasser:	Bhattacharyya, A.K., Goyette, G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Amplitudes Antenna arrays Antenna feeds Antennas Aperture antennas Aperture efficiency Apertures Applied sciences array feed Arrays cross-polarization Dielectrics Exact sciences and technology horn Horn antennas Horns multibeam reflector Phases Propagation through the atmosphere Radiators Radio frequency Radiocommunications Radiowave propagation Reflector antennas Surface discharges Telecommunications Telecommunications and information theory Tellurium Walls
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Beschreibung
Zusammenfassung:	A step horn structure is presented that yields about 90% aperture efficiency with low cross-polar radiation. It is found that for obtaining high aperture efficiency, the horn aperture should consist of only the TE/sub z/ type of modes in appropriate amplitudes and phases. The desired TE/sub z/ modes are produced using multiple steps in the horn walls. The distances between the steps are critical to suppress the undesired TM/sub z/ modes. Radiation characteristics of high efficiency circular and square horns are presented and potential applications of such high efficiency horns are discussed.
ISSN:	0018-926X 1558-2221
DOI:	10.1109/TAP.2004.835233