Thales

Renaud Chiniard

Hervé Legay

Daniele Bresciani

Herve Legay

Nelson Fonseca

Jean-Philippe Fraysse

Ségolène Tubau

Etienne Girard

Claude Drevon

Jean-François David

François Doucet

David Nevo

George Goussetis

Philippe Monfraix

Danièle Bresciani

Wenxing Tang

Chloé Schaffauser

Barbara Bonnet

A radio frequency reflect-array panel for satellite antenna, includes a structural support; radio frequency tiles supporting polygonal radio frequency cells configured to reflect and phase-shift incident radio frequency signals; a complete link, between the structural support and the radio frequency tile; and at least two runner-type links, between the structural support and the radio frequency tile, in the plane of the panel, of distinct axes and passing through the complete link.

Radio frequency reflect-array single panel for satellite antenna and an assembly of radio frequency reflect-array panels for satellite antenna comprising at least one such panel

A polarizing reflector for broadband antennas includes a flat dielectric substrate, a patch array layer formed by a bi-dimensionally periodic lattice of thin metallic patches along first and second perpendicular directions x, y, and a ground layer. All the patches have a same shape elongated along the second direction y and form electric dipoles when electrically excited along the second direction y. For each row the patches of the said row are interconnected by an elongated metallic strip oriented along the first direction x and having a width c. The geometry of the patch array, the thickness h and the dielectric permittivity &#x3b5;of the substrate, and the width c of the elongated metallic strips are tuned so that the patch array including the elongated metallic strips induces a fundamental aperture mode and a complementary fundamental dipolar mode along two orthogonal TE and TM polarizations within a single operating frequency band or two separate operating frequency bands, and the differential phase between the two fundamental modes over the single or the first and second frequency bands being equal to +90&#xb0; or to an odd integer multiple of &#xb1;90&#xb0;. The polarizing reflector can comprise also a curved substrate and a patch array layer formed by a bi-dimensionally lattice of metallic patches along first curvilinear rows and second curvilinear columns.

Polarizing reflector for multiple beam antennas

An excitation assembly comprises a symmetrical OMT and two splitters respectively connected to two pathways of the OMT. The OMT comprises a cross junction comprising a central waveguide parallel to an axis Z and four lateral ports oriented in two directions X, Y, the first splitter consisting of an input waveguide and of two output ports coupled to two lateral ports, oriented in the direction X, by respective connection waveguides. The first splitter is located on a lateral side of the OMT, orthogonally to the direction X, and its two output ports are formed one above the other in a lateral wall of the input waveguide, the upper output port being placed facing a first lateral port of the OMT to which it is connected by the first connection waveguide. The difference in electrical length between the two connection waveguides is equal to &#x3bb;/2.

Compact bipolarization excitation assembly for a radiating antenna element and compact array comprising at least four compact excitation assemblies

A reflector array comprises a plurality of individual radiating elements forming a reflecting surface with no abrupt transitions wherein each radiating element of the reflecting surface is selected from a set of predetermined consecutive radiating elements, called the pattern, the first and last elements of the pattern correspond to one and the same phase, modulo 360&#xb0;, and are identical, and the radiating elements of the pattern have a radiating structure, of metal patch type and/or of radiating aperture type, that progressively changes from one radiating element to another adjacent radiating element, the change in the radiating structure comprising a succession of progressive growths of at least one metal patch and/or at least one aperture and appearances of at least one metal patch in an aperture and/or at least one aperture in a metal patch.

Reflector array and antenna comprising such a reflector array

A dual-polarization planar radiating element having an external metal grid, at least one metal patch concentric with the external metal grid and a cavity separating the metal grid and the metal patch, the grid and the patch having a polygonal shape delimited by at least four pairwise opposite sides, and two orthogonal directions of polarization associated with two orthogonal electric fields Ev and Eh, at least one of the directions of polarization being parallel to two sides of the polygon. Each side of the metal patch parallel to a direction of polarization is linked electrically to a zone of the external grid where one of the electric fields Ev or Eh is a minimum. The invention exhibits the advantage of reducing the phenomenon of electrostatic discharges in the planar radiating elements without significantly modifying the response of the radiating element subjected to an orthogonally polarized wave.

Dual polarization planar radiating element and array antenna comprising such a radiating element

Growing community of inventors

Toulouse, France

Renaud Chiniard