Thales

Alain Le Fevre

Pierre-Henri Boutigny

Laurent Collin

Mathilde Bellec

Stéphane Pommier

A process for manufacturing a composite material of 3-D shape, includes a stack of layers of resin and fibre, incorporating at least one metal layer, the process comprising the following steps, a standard unit pattern having been determined for the metal layer: i/ computing periodically organized patterns on the 3-D shape, which is non-developable; then projecting, onto a plane, the patterns, thus defining a planar organization of second patterns; ii/ partially polymerizing, flat, first layers, comprising a metal top layer, of the flat composite stack, so as to make it etchable, but to keep it still deformable; iii/ electrochemically etching the organization of second patterns that was defined in step i into the metal top layer of the flat composite stack resulting from step iv/ carrying out polymerization of the etched composite stack after the stack has been placed in a mould having the desired 3-D shape.

3-D object comprising a sandwich of one or more composite layers, of one or more layers of metal patterns and optionally of one or more layers of possibly dense polymers for electromagnetic applications in antennas and/or radomes

A dual-polarization communication antenna for satellite mobile links comprising a number of radiant elements etched on a substrate, a connector enabling the antenna elements to be connected to a power source, said antenna including one or more subantennas, each of said subantennas including: N dual-polarization antenna elements mounted in series with one another and linked together by means of a portion of a first conduction line C; K dual-polarization antenna elements linked together by means of a portion of a second conduction line C, said K antenna elements being arranged relative to one another in parallel; wherein said lines C, Care electrically linked and linked to the connector; and the set formed by the N antenna elements is mounted in series with the set of the K antenna elements.

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Colombes, France

Alain Le Fevre