Design and implementation of the Koreasat-3 Ka-band FSS antenna

Abstract

The Ka-band antenna subsystem discussed in this paper forms a part of an active-repeater communications spacecraft for use in geosynchronous, circular, equatorial orbit for the Korean domestic service. The antenna is a Gregorian-type configuration with a shaped main reflector fed by a circularly polarized feed and it is used for transmission and reception. The paper first presents the antenna main performance requirements and the description of the design. They are followed by a description of the key implementation issues. Finally, feed breadboard results and antenna performance predictions derived from the feed results are presented.