The equivalent paraboloid of an optimized off-set cassegrain antenna

Abstract

A. Introduction. Increasing interest is being shown in both ground-based and satellite-borne dual offset reflector systems for telecomnunication applications. A particular class of these antennas is "optimized" with respect to reduction of cross polorization by tilting the subreflector axis and cocking the boresight axis of the feed. This paper defines the parameters of an equivalent paraboloid construction for this antenna and investigates its accuracy in calculating the directivity pattern.