Patent ID: 6323822
Filing Date: 2001-11-27
Classification: H01Q

Abstract:
A multibeam antenna system comprising:a modified offset parabolic antenna including a reflector;a shape G(x,y) of the reflector, when mapped to a unit circle, is determined by the Zernike expansion: ##EQU5##where Z.sub.mn (x,y)=R.sub.mn (.rho.)cos .phi., U.sub.mn (x,y)=R.sub.mn (.rho.)sin .phi., .rho. and .phi. being polar coordinates, and where ##EQU6##the values of the parameters c.sub.mn and d.sub.mn being selected so that the reflector surface focuses beams from three separate sources spaced along an arc onto three focal points and maximizes the gain of the multibeam antenna system for at least two of the beams.