Thales

Centre National De La Recherche Scientifique

Das Photonics S.l

Gérard Caille

Hervé Legay

Michel Sotom

Jean-Didier Gayrard

Ronan Sauleau

Philippe Voisin

Yann Cailloce

Raphael Gillard

Daniele Bresciani

Alexandre Laisne

Eric Labiole

Béatrice Salome

David Cadoret

Shoaib Muhammad

Miguel Angel Piqueras Ruiperez

Teresa Mengual Chulia

Cécile Guiraud

Yoann Jacquet

Danièle Bresciani

A radiating element is provided, for example for array antenna, having stacked resonant cavities of P&#xe9;rot-Fabry type, of compact structure, a lower cavity being fed by excitation means, the radiating element being characterized in that corrugations are formed substantially below a first earth plane delimiting in its lower part the upper resonant cavity. A radiating element structure of improved compactness is also proposed, whose upper cavity is surmounted by a polarizing radome.

Compact radiating element having resonant cavities

A reflector array antenna with cross-polarization compensation including at least one radiating element having an etched pattern dissymmetric with respect to at least one direction X and/or Y of the plane XY of the radiating element, the dissymmetry of the pattern of the radiating element being calculated individually on the basis of a radiating element of the same symmetric pattern along the two directions X and Y, so as to engender a reflected wave having a controlled depolarization which opposes a depolarization, engendered in a plane normal to a direction of propagation, by the reflector array illuminated by a primary source.

Reflector array antenna with crossed polarization compensation and method for producing such an antenna

A transmit and/or receive array antenna comprises an array (R) of sub-arrays (SR) of at least one radiating element (ER) and control means charged with controlling the amplitude and/or the phase of the radiofrequency signals to be transmitted or received in the form of waves by each of the sub-arrays (SR) so that they transmit or receive signals according to a chosen pattern. The sub-arrays (SR) comprise a mean number of radiating elements (ER) which increases from the center of the array (R) to its periphery, and are arranged with respect to one another so as to constitute an irregular mesh offering pattern sidelobes of low intensity and a high gain in a favored direction.

Array antenna with irregular mesh and possible cold redundancy

A reflector network antenna (A) comprising i) a source (S) delivering wave signals; ii) at least two reflector networks (RR-RR) which are different and independent and which both comprise at least two phase shifter cells which selectively phase shift the waves delivered by the source (S) and bring about a selected frequency phase dispersion thereof, said selective phase shifting and selective dispersion varying from one reflector network to another; and iii) a charging device (DC) which is coupled to the reflector networks (RR-RR) and which is used to place one of them in a selected position in relation to the source (S) such that the waves that it delivers are phase shifted and phase dispersed at a frequency imposed by said phase shifter cells in order to be reflected in a selected direction.

Reflector array antenna with reconfigurable shape coverage with or without loader

A phase shifter module (CD), dedicated to a reflectarray antenna, is defined by a characteristic resonant length and, in at least one chosen place, has an MEMS type device (DC, DC') able to be placed in at least two different states respectively permitting and prohibiting the establishing of a short-circuit intended to vary said resonant length, in order to vary the phase shifting of a wave to be reflected presenting at least one linear polarization.

Phase shifter module whose linear polarization and resonant length are varied by means of MEMS switches

Growing community of inventors

Tournefeuille, France

Gérard Caille