Application of FSS to reduction of antennas' RCS

It is an effective approach for reducing antennas' scattering to use frequency selective surface (FSS) as main reflector or subreflector. The measured results are given and discussed. In comparison with ordinary metallic reflector antenna, the FSS reflector antenna's radiation properties are maintained basically but its radar cross-section (RCS) is reduced significantly. FSS subreflector can be more easily applied to practice, but has a little higher RCS level than that of FSS main reflector.