Abstract: 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.

Abstract: The present invention relates to a multiband transmit-receive coupler-separator with a very wide band of the OMT (“OrthoMode Transducer”) type for microwave-frequency telecommunications antennae. This coupler comprises a port for propagating all of the frequencies, a body and a port for propagating high-frequency bands, these three portions being coaxial, and wide-band coupling slots for propagating the low-frequency bands made in the body and each associated with a waveguide, and it is characterized in that its body joining the two ports has a shape of revolution the profile of which changes according to a multipolynomial law, constantly decreasing from the port with the largest cross section to the port with the smallest cross section.

Abstract: The present invention relates to a multiband transmit-receive coupler-separator with a very wide band of the OMT (“OrthoMode Transducer”) type for microwave-frequency telecommunications antennae. This coupler comprises a port for propagating all of the frequencies, a body and a port for propagating high-frequency bands, these three portions being coaxial, and wide-band coupling slots for propagating the low-frequency bands made in the body and each associated with a waveguide, and it is characterized in that its body joining the two ports has a shape of revolution the profile of which changes according to a multipolynomial law, constantly decreasing from the port with the largest cross section to the port with the smallest cross section.