COMPACT MULTI-FREQUENCY HORN ANTENNA, RADIATING FEED AND ANTENNA COMPRISING SUCH A HORN ANTENNA

摘要

A horn antenna, able to propagate signals in a spectrum of frequencies B1, . . . , Bi, . . . , BN, B1 being the lowest frequency band, Bi being at least one intermediate frequency band and BN the highest frequency band, comprises a side wall axisymmetric about a longitudinal axis Z, an axial access orifice, termed throat, and a radiating aperture, the side wall comprising annular corrugations. The horn antenna further comprises four coaxial probes diametrically opposite in pairs. The four probes are inserted into a specific, dedicated corrugation, the four coaxial probes being spaced apart at equal angles in a plane perpendicular to the longitudinal axis Z and entering the longitudinal axial conduit of the horn antenna. Each coaxial probe is designed for the propagation of signals in the lowest frequency band B1 of the spectrum.

主权项

1. A multi-frequency horn antenna able to propagate signals in a spectrum of frequencies comprising multiple different frequency bands B1, . . . , Bi, . . . ,BN, i being between 1 and N, B1 being the lowest frequency band, Bi being at least one intermediate frequency band and BN the highest frequency band, the horn antenna comprising a side wall axisymmetric about a longitudinal axis Z, an axial access orifice, termed throat, and a radiating aperture opposite the axial access orifice, the side wall bounding a longitudinal axial conduit connecting the axial access orifice and the radiating aperture, the longitudinal axial conduit having, in cross section, a diameter that increases between the axial access orifice and the radiating aperture, the side wall comprising an internal surface consisting of a plurality of concentric annular corrugations located in successive planes that are mutually parallel and perpendicular to the longitudinal axis Z, each corrugation being centred on the longitudinal axis Z, the horn antenna further comprising four coaxial probes which are diametrically opposite in pairs, inserted into a specific, dedicated corrugation of the side wall, perpendicular to the longitudinal axis Z, the four coaxial probes being spaced apart at equal angles in a plane perpendicular to the longitudinal axis Z and entering the longitudinal axial conduit of the horn antenna, each coaxial probe being designed for the propagation of signals in the lowest frequency band B1 of the frequency spectrum.