Sidelobe Modification for Reflector Antennas by Electronically Reconfigurable Rim Scattering

Dynamic modification of the pattern a reflector antenna system traditionally requires an array feeds. This paper presents alternative approach in which scattering from fraction around rim is passively modified using, for example, electronically-reconfigurable reflectarray. facilitates flexible sidelobe modification, including canceling, systems employing single feed. Applications such include radio astronomy, where deleterious levels interference satellites enter through sidelobes. We show that efficient reconfigurable surface occupying about 11% area axisymmetric circular paraboloidal fed prime focus sufficient to null arriving any direction outside main lobe with little change characteristics. further required independent frequency and same performance can be obtained using 1-bit phase control constituent unit cells additional 6% surface.