Characteristics of frequency selective surfaces for a multi-band communication satellite

The authors describe an antenna system for a proposed multiband communication satellite utilizing five frequency bands. Ka (30/20 GHz), Ku (14/12 GHz), C (6/4 GHz), S (2.6/2.5 GHz), and L (1.6/1.5 GHz). Seven beam configurations have been created, including three multibeams, three shaped beams, and a circular single beam. The authors present feasibility studies on three kinds of frequency selective surfaces, the key technology for constructing this satellite. One is a novel frequency-selective subreflector with two separate focal feed positions. The others are planar frequency selective surfaces specified with low losses and wide reflection bandwidths. Measured data suggest the reliable achievement of low-loss frequency sharing and the possibility of realizing an advanced communication satellite.<>