Patent ID: 6809695
Filing Date: 2004-10-26
Classification: H01Q

Abstract:
A secondary reflector for SHF antennae of the Cassegrain type with a secondary basic reflector (103), which includes a first circular â€œringâ€  (104) in the shape of a cylinder made of conducting material, whose diameter is equal to the external diameter of the basic reflector, secured by one of its ends to the outer edge of this basic reflector so that it extends to the side of the reflecting surface of the reflector, and whose height (H) is designed to reduce the â€œoverspill radiationâ€  of the secondary reflector, characterised in that it also includes a second â€œringâ€  (105) in the shape of a circular crown, made of conducting material, whose inside diameter is equal to the diameter of the first ring, fixed to the free end of this first ring and with a width (h) chosen to further reduce said overspill radiation.