公开(公告)号：US20240283160A1

公开(公告)日：2024-08-22

申请号：US18566937

申请日：2022-12-12

Applicant: LEONARDO S.P.A.

Inventor： Giorgio Gibilaro ,  Tindaro Cadili ,  Anna Genovese ,  Liborio Gianino ,  Agatino Privitera ,  Fabrizio Tosto ,  Vincenzo Cascio

IPC: H01Q13/02 ,  H01Q5/55

CPC classification number: H01Q13/025 ,  H01Q5/55

Abstract: The invention concerns a multimode feed for a reflector antenna of a monopulse tracking system. The feed comprises: a receiving element having an aperture, which receives an electromagnetic wave and generates, from the electromagnetic wave, a waveguide signal comprising a plurality of higher-order modes, as a function of an incidence angle of the electromagnetic wave on the aperture; and a waveguide structure, coupled to the receiving element, which generates, from the plurality of higher-order modes, a first error signal at a first output port and a second error signal at a second output port. The waveguide structure has: a first coupler that extracts, from the waveguide signal, a first higher-order mode and provides a first extracted signal; a second coupler that extracts, from the waveguide signal, a second higher-order mode and provides a second extracted signal; a third coupler that extracts, from the waveguide signal, a third higher-order mode and provides a third extracted signal; a fourth coupler that extracts, from the waveguide signal, a fourth higher-order mode and provides a fourth extracted signal; a first summing element that sums the first extracted signal and the second extracted signal, thereby generating the first error signal at the first output port; and a second summing element that sums the third extracted signal and the fourth extracted signal, thereby generating the second error signal at the second output port.