Title :
Improved element pattern for the line feeds of the spherical reflector antenna in Arecibo
Author :
Ulversoy, T. ; Kildal, Per-Simon
Author_Institution :
Norwegian Inst. of Technol., Trondheim, Norway
fDate :
12/1/1989 12:00:00 AM
Abstract :
The line feeds of the spherical reflector antenna in Arecibo are considered. A model for the element pattern is presented and used to give a better explanation of the central dip in the radiation pattern of the line feed than that given before. The model includes the effect of the fins between the elements by considering the line feed to be a circularly corrugated cylinder. Such a corrugated cylinder has, according to recent results, a soft outer surface at which the electric field vanishes
Keywords :
antenna feeders; antenna radiation patterns; radiotelescopes; reflector antennas; Arecibo; circularly corrugated cylinder; element pattern; line feeds; radiation pattern; radiotelescope; spherical reflector antenna; Antenna feeds; Antenna radiation patterns; Apertures; Corrugated surfaces; Diffraction; Observatories; Optical design; Optical surface waves; Optical waveguides; Reflector antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
