Thales

Alcatel

Thierry Judasz

Jacques Maurel

Jean-Marc Bassaler

Jean-Francois David

Jean-François David

Luc Cavelier

Claude Labourdette

Bruno Benoist

Michael Jardin

Olivier Martin

Michaël Jardin

A horn that radiates a radioelectric wave coming from an input waveguide, comprises a grating placed over the aperture of the horn. The waveguide comprises a horn-shaped segment, an entrance, an aperture, and a grating placed next to the aperture. It makes it possible for at least one linearly polarised electromagnetic wave to propagate between the entrance and the aperture along a first axis. The grating comprises a frame and a set of plates extending longitudinally and continuously from a first short side of the frame to a second short side of the frame, so as to form a linear polarising filter for any electromagnetic wave the electric field of which is not polarised along a second axis orthogonal to the first axis. The grating of the waveguide comprises corrugations to reinforce the filtering of the electromagnetic wave the electric field of which is not polarised along the second axis.

Horn antenna with corrugated grating

Multifrequency reflecting antenna (AR), for example for a telecommunication satellite that comprises a reflector (R) with a front face (FA) for reflecting beams of electromagnetic waves belonging to at least two different frequency bands. The front face (FA) of the reflector (R) comprises a structure (ST) defining a three-dimensional pattern with symmetry of revolution, chosen so as to shape the beams such that they have approximately identical radiofrequency characteristics.

Reflecting antenna with 3D structure for shaping wave beams belonging to different frequency bands

Dual polarisation antenna having low side lobes, useful in a satellite radio communication system. The antenna includes a reflector assembly ( ) illuminated by a feed source ( ). The reflector assembly ( ) includes a front reflector ( ) that reflects two electromagnetic waves orthogonally polarized and each at a different frequency, an auxiliary reflector ( ) that reflects one of the orthogonally polarized electromagnetic waves, and a deflecting surface ( ) that totally diffracts the orthogonally polarized electromagnetic wave that passes through the auxiliary reflector ( ).

Dual polarization antenna with low side lobes

A multi-beam antenna system including a parabolic reflector with a parallelogram perimeter, which is illuminated by a plurality of feed elements. The parabolic reflector reflects a first beam corresponding to one frequency that illuminates a first parallelogram spot, and a second beam corresponding to the same frequency illuminates a second parallelogram spot. The first and second spots are parallelepiped and are arranged such that spots of the same frequency are generally not adjacent to each other.

Multibeam antenna system

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Ramonville, France

Thierry Judasz