Centre National De La Recherche Scientifique

Université De Rennes 1

Thales

Arianegroup Sas

Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno

Centre National Detudes Spatiales

Le Centre National De La Recherche Scientifique

L'universite De Rennes 1

Institut National Des Sciences Appliques

Aptiv Technologies Limited

Centralesupelec

Institut National Des Sciences Appliquees

Université De Rennes

Nantes Université

Institut National Des Sciences Appliquees De Rennes

Mauro Ettorre

Ronan Sauleau

Hervé Legay

Jean-Philippe Fraysse

Etienne Girard

Regis Lenormand

Gerard Raguenet

Nelson Fonseca

Nicolas Capet

Andrea Neto

Ségolène Tubau

Giampiero Gerini

Maria Garcia Vigueras

Jean-Michel Mateus

Friedman Tchoffo Talom

Jean-Michel Merour

Bertrand Boin

Davy Guihard

Nicolas Attaja

Antoine Calleau

Francesco Foglia Manzillo

Karim Tekkouk

Guillaume Fondi De Niort

Herve Legay

David Gonzalez Ovejero

Luan Vu

Antenna includes at least one first resonant cavity and a second resonant cavity, each resonant cavity being closed by a base at one end and including a radiating element superimposed on the base of the resonant cavity, the radiating element of the first cavity being able to transmit a signal on a first frequency band and the radiating element of the second cavity being able to transmit a signal on a second frequency band separate from the first frequency band, characterized in that a first distance between the base and radiating element of the first cavity differs from a second distance between the base and radiating element of the second cavity.

Multiband antenna

The invention relates to an antenna comprising a radiative antenna element able to emit a signal in at least two disjoint frequency bands and a waveguide covered by the radiative antenna element, comprising two nested resonant cavities, each single-mode or mostly single-mode in a separate frequency band.

Antenna with improved coverage over a wider frequency band

A circularly polarized radiating element includes at least one excitation aperture for a wave that is linearly polarized with what is referred to as an excitation first polarization, a frequency selective surface and a metasurface comprising a two-dimensional and periodic array of metasurface cells, the excitation aperture opening onto the metasurface, the metasurface cells all being oriented identically with respect to the excitation polarization and configured to: reflect an incident wave having the excitation polarization in order to form a reflected wave polarized with the excitation polarization, and depolarize and reflect the incident wave in order to form a reflected wave polarized with the orthogonal polarization, having a phase difference substantially equal to &#xb1;90&#xb0; with respect to the reflected wave polarized with the excitation polarization, and having an amplitude substantially equal to the amplitude of a wave radiated by the frequency selective surface, generated from the reflected wave polarized with the excitation polarization.

Circularly polarised radiating element making use of a resonance in a Fabry-Perot cavity

The present disclosure relates to a multilayer electromagnetic waveguide that includes a plurality of layers forming guide channels for an electromagnetic wave, and at least one transition device including at least one dielectric layer between two guide channels, referred to as coupled guide channels, extending as an extension. Each transition device includes at least one adaptation channel extending in a longitudinal direction, and each adaptation channel is defined by two electrically conductive walls. At least one wall extends along the dielectric spacer layer from one end of the coupled guide channel, over a length suitable for optimizing the transmission of an electromagnetic wave between the two coupled guide channels.

Multilayer waveguide comprising at least one transition device between layers of this multilayer waveguide

A beamformer comprises a transmission line fed by at least one input feed source, the transmission line comprising two stacked metal plates extending, along two directions, longitudinal X and transverse Y. The transmission line further comprises at least one protuberance extending in the directions X, Y, and in a direction Z orthogonal to the plane XY, the protuberance comprising a metal insert extending in the directions X and Y and extending height-wise in the direction Z, the insert comprising a base fastened to one of the two metal plates and a free end and having a contour of variable length between the two lateral edges of the transmission line. In the protuberance, the transmission line is adjoining the insert and forms, in the direction Z, a circumvolution around the insert.

Quasi-optical beamformer with lens and plane antenna comprising such a beamformer

A compact Butler matrix consists a planar multilayer structure comprising N parallel metal plate waveguides PPW, stacked one on top of the other, two adjacent waveguides PPW comprising a common wall consisting of one of the metal plates. The couplers, the phase-shifters and the crossover devices of the Butler matrix consist of metasurfaces incorporated in the metal plates. The planar two-dimensional beam-former can comprise a Butler matrix with waveguides PPW associated with optical lenses incorporated in each waveguide PPW. Alternatively, the planar two-dimensional beam-former can comprise an upper stage consisting of a Butler matrix with waveguides PPW, and a lower stage comprising waveguides PPW equipped with incorporated reflectors, the two stages being connected in series.

Compact butler matrix, planar two-dimensional beam-former and planar antenna comprising such a butler matrix

The multi-beam former comprises: two stages connected together and intended to synthesize beams focused along two directions in space; each stage comprises at least two multi-layer plane structures (P, PNy), (P, PMx), superposed one above the other; each multi-layer structure (P, PNy, P, PMx) comprises an internal reflector, at least two first internal sources disposed in front of the internal reflector and linked to two input/output ports (27, 26) aligned along an axis (V, V'), at least two second internal sources disposed in a focal plane of the internal reflector and linked to two second input/output ports (25, 28) aligned along an axis (U, U&#x2032;) perpendicular to the axis (V, V&#x2032;); the two second internal sources of the same multi-layer structure (P) of the first stage are respectively linked to two first internal sources of two different multi-layer structures (P), (PMx) of the second stage.

Two-dimensional multi-beam former, antenna comprising such a multi-beam former and satellite telecommunication system comprising such an antenna

A multilayer antenna is provided, which includes a power supply portion generating a wave, a radiating portion, and a guide portion that makes it possible to guide the wave from the power supply portion to the radiating portion. The guide portion includes: at least two stacked guide layers having parallel planes and, for each pair of adjacent layers, a transition between the adjacent layers, including a reflector engaging with a slot-coupling. For at least one pair of adjacent layers, for which the guide portion includes a non-planar reflector, the slot-coupling includes a plurality of slots. Each slot includes a main body that is elongate along at least one axis. The slots are placed on at least one row and together form a pattern that extends along the reflector and has a shape that is dependent on the shape of the reflector.

Multilayer pillbox type parallel-plate waveguide antenna and corresponding antenna system

A flat scanning antenna comprises at least one slotted waveguide array comprising two dielectric substrates, one superposed above the other. The two substrates comprise the same number of waveguides, which are in mutual correspondence and communicate between them, pairwise, via corresponding coupling slots. Each waveguide of the upper substrate further includes a plurality of radiating slots, all the radiating slots being mutually parallel and oriented in the same direction and each waveguide of the lower substrate includes an individual internal supply circuit comprising an individual phase-shift/amplification electronic circuit.

Flat scanning antenna for a terestrial mobile application, vehicle having such an antenna, and satellite telecommunication system comprising such a vehicle

A leaky wave antenna has electrically conductive surfaces in parallel to each other. At one place a two-dimensional array of slots is provided in one of the surfaces. Elsewhere a feed structure is realized comprising one or more electrically conductive elements coupled between the first and second electrically conductive surface and configured to direct an electromagnetic wave pattern travelling between surfaces towards the array. In an embodiment the feed structure comprises a waveguide formed between walls connecting the surfaces. One of the walls is made to leak in order to feed the array of slots. In an embodiment the feed structure comprises a reflector comprising connections between the surfaces, to direct waves between the surfaces to the array of slots.

Leaky wave antenna using waves propagating between parallel surfaces

Growing community of inventors

Rennes, France

Mauro Ettorre