Frequency-selective surfaces function as spatial filters. They consist of laminates of printed-circuit elements which have frequency-sensitive plane wave scattering properties. In Seavey Engineering’s designs, hollow crossed-dipole and Jerusalem Cross elements are used. These are designed using moment methods on a computer. All designs are fully polarization-agile. FSS devices have low-loss transmission and reflection properties. Most designs function as subreflectors in dual-reflector antenna systems. The Model 9170-850 FSS design reflects signals from 9 - 10 GHz and transmits signals in the 2 - 4 GHz frequency band. It is formed onto a small (8.5-inch diameter) hyperboloid subreflector. |
  Model No. 9170-850 Frequency-Selective Subreflector |