The tri-band frequency selective surface of C/S-antenna system of N-star satellite

The N-star satellite C/S antenna system shown considered consists of the main reflector, frequency selective subreflector FSS, the S-band helices, and the C-band feed horns. The C/S subreflector consists of a planar frequency selective surface which is reflective at S-band, and transparent at C-band. In this paper the analysis and design procedure, as well as the performance of the frequency selective subreflector, is presented.