First introduced to the satellite communications industry in 1982, Seavey Engineering?s dual band antenna feeds are now the accepted standard. They simultaneously access all downlink signals from hybrid satellites. Dual band feeds operate over the standard frequencies of 3.7 – 4.2 GHz in C-band and 10.7 – 12.75 GHz in 500 MHz bandwidths. Both two-port and four-port versions are offered with a wide range of options. Basic feeds use a concentric circular waveguide at Ku-band and an overmoded coaxial waveguide operating at C-band.