A dual offset shaped reflector with a tilted elliptical main reflector
Spacecraft antennas with elliptical beams, low cross polarization and low side lobes can be designed systematically using Geometrical Optics (Viskum et al, 1992). By controlling the amplitude taper of the aperture distribution through the shaping, low side lobes can be enforced, and a good choice of geometrical parameters in the offset system can minimize the cross polarization.
Publication: 1993 IEEE AP-S Symposium Digest
Place: Ann Arbor, Michigan, USA, 28 June -2 July, 1993