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Scan performance of dual offset reflector antennas for satellite communications
Author(s) -
RahmatSamii Y.,
GalindoIsrael V.
Publication year - 1981
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs016i006p01093
Subject(s) - cassegrain antenna , cassegrain reflector , paraboloid , optics , reflector (photography) , offset (computer science) , offset dish antenna , fan beam antenna , bessel function , parabolic reflector , periscope antenna , physics , physical optics , diffraction , computer science , antenna (radio) , antenna measurement , mathematics , telecommunications , geometry , surface (topology) , light source , telescope , programming language
This paper summarizes the basic numerical steps employed to analyze dual offset reflector antennas. The technique is based on the application of the geometrical theory of diffraction from the subreflector and physical optics (PO) scattering from the main reflector. The PO integral is evaluated by using the Jacobi‐Bessel series expansion. Numerical results are presented for the off‐axis (scan) performance of an offset (clear aperture) Cassegrain antenna and comparison is made between a Cassegrain antenna and its equivalent paraboloid.