Thales

Centre National De La Recherche Scientifique

Institut National Des Sciences Appliquees De Rennes

Raphaël Gillard

Hervé Legay

Afshin Ziaei

Etienne Girard

Thierry Dean

Ronan Moulinet

Tony Makdissy

Erwan Fourn

Guillaume Lathiere

Michel Charrier

Béatrice Pinte

Daniel Bresciani

A radiating device for an antenna comprises a first ground plane comprising a surface electric field main feed line, a second ground plane substantially perpendicular to the first ground plane and comprising electromagnetic coupling means fed orthogonally by a first end of the main feed line, and a resonant structure adapted to radiate energy in the event of excitation by electromagnetic coupling at the first end of the main feed line via the coupling means.

Multipolarization radiating device with orthogonal feed via surface field line(s)

The invention relates to phase-shifting cells constituting the passive reflectarrays of antennas with a reconfigurable transmission direction, transmitting in the microwave range. More particularly, the invention describes, within the context of phase-shifting cells of the type having dipole strands angularly distributed in a star configuration, a novel type of switch consisting of a microelectromechanical device essentially comprising a suspended micromembrane which, under the action of an electrostatic force caused by a control voltage, deforms sufficiently to ensure electrical connection between the strands, making it possible to form a dipole in the desired orientation. In one particular embodiment, the micromembrane can be likened to one of the plates of a capacitor and its deformation corresponds to a substantial increase in the capacitance of this capacitor, thus providing the electrical connection. This switch technology has the advantages of greater fabrication simplicity and of enhanced performance compared with the known technologies. The invention provides the main geometrical and technological characteristics for obtaining optimized performance.

Phase-shifting cell for an antenna reflectarray

Growing community of inventors

Rennes, France

Raphaël Gillard