An omni directional coverage multibeam antenna relief on a ground surface having simple conical shapes to provide beam steering is disclosed. One advantage of such a system is that the projected area is always constant and broadside to the intended direction resulting in limited scan loss effects. In...http://www.google.fr/patents/US6094166?utm_source=gb-gplus-shareBrevet US6094166 - Conical omni-directional coverage multibeam antenna with parasitic elements
Conical omni-directional coverage multibeam antenna with parasitic elements
