Title :
Study of a feed cluster for the Gregorian dual-reflector feed of the Arecibo radio telescope
Author :
Kildal, P.-S. ; Johansson, M. ; Hagfors, T. ; Giovanelli, R.
Author_Institution :
Chalmers Univ. of Technol., Gothenburg, Sweden
Abstract :
It is shown that a hexagonal seven-element cluster of dual-mode horn antennas can be used in the Gregorian dual-reflector feed of the Arecibo telescope, to provide seven beams of sufficient quality at 1.42 GHz for many radio-astronomy purposes. Better performance is available at higher frequencies. The cluster feed study has been carried out using geometrical-optics ray tracing, i.e., the TRT code. The TRT results have been verified against physical-optics integration at 1 GHz.<>
Keywords :
antenna feeders; horn antennas; radiotelescopes; ray tracing; reflector antennas; 1.42 GHz; Arecibo radio telescope; Gregorian dual-reflector feed; UHF; dual-mode horn antennas; feed cluster; geometrical-optics ray tracing; hexagonal seven-element cluster; performance; Apertures; Feeds; Frequency; Geometrical optics; Geometry; Radio astronomy; Shape; Space technology; Supercomputers; Telescopes;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
DOI :
10.1109/APS.1992.222015
