Title :
Application of spherical wave theory to cassegrainian-fed paraboloids
Author :
Potter, Philip D.
Author_Institution :
Jet Propulsion Laboratory, Pasadena, CA, USA
fDate :
11/1/1967 12:00:00 AM
Abstract :
In this paper the spherical wave expansion technique is used to analyze the general properties of paraboloidal antenna feed systems. As a result, fundamental aperture efficiency and noise temperature limitations are established as quantitative functions of antenna wavelength size. A boundary-value solution is found for synthesis of ideal subreflector shapes in a Cassegrain-type feed system. The resulting surface is found to reduce the classical hyperboloid in the limit of zero wavelength. Applications of this synthesis technique to high performance feed systems and subreflector matching are discussed. Finally, an interesting quantitative cross-check between vector spherical wave and vector diffraction theories is obtained.
Keywords :
Reflector antenna feeds; Antenna radiation patterns; Aperture antennas; Feeds; Geometrical optics; Microwave antennas; Optical design techniques; Optical diffraction; Optical surface waves; Performance analysis; Propulsion;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.1967.1139053