Alcatel Espace

Societe Anonyme Dite : Alcatel Espace

Thales

Alcatel N.v. Societe Dite

Gerard Raguenet

Regis Lenormand

Michel Gomez-Henry

Olivier Remondiere

Michel Lairle

Ronan Sauleau

Mauro Ettorre

Thierry Dusseux

Didier Rene

Frederic Magnin

Jean-Michel Mateus

Jean-Philippe Marre

Michel Salvan

Jean-Claude Anne

Philippe Gourlain

Antoine Clerino

Michel Coustere

Jean-Michel Merour

Marcel Billand

Pierre Fraise

Alain Gergondey

Jean-Claude Goupil

Jacques Neron

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 feed device for a radiating element operating in dual polarization, for use especially in the field of space transmission, comprises a first feed line penetrating into a first cavity located beneath said radiating element, and a second feed line disposed in a configuration orthogonal to the first line and penetrating into a second cavity located in line with the first, a conductive part forming a coupling slot between the two cavities.

Feed device for a radiating element operating in dual polarization

A plane antenna suitable for space applications in particular comprises a passive resonator coupled to a feedline by a looped slot.

Multilayered, planar antenna with annular feed slot, passive resonator

A miniaturized radio antenna element for use at VHF and UHF is designed to operate well short of resonance. It comprises a small flat cavity in the surface of which is formed at least one radiating slot very much smaller than a normal resonant slot. However, an impedance matching circuit is often required at the ports of this antenna.

Miniaturized radio antenna element

The invention concerns a broadband antenna element for array antennas using microstrip technology. In accordance with the invention, an etched patch 2 on a dielectric substrate 1 is disposed at the bottom of a cavity 7 defined by conductive walls 8, cylindrical walls, for example, or walls of more complicated geometry. Depending on the embodiment, the conductive walls 8 can extend through the dielectric substrate 1 to form an electric contact with the ground plane 6 or a second resonator comprising a second etched patch 12 on a second thin dielectric substrate 11 may be placed in front of the cavity 7. The invention also applies to antenna subarrays constructed from a plurality of these antenna elements and to array antennas constructed from a plurality of these subarrays.

Broadband cavity-like array antenna element and a conformal array

A multifrequency radiating device comprising at least one radiating element (11) of a first type and at least one radiating element (12) of a second type, the elements being associated on a common surface (10) in order to constitute an array antenna. The radiating elements of the first type (16) are elements of the microstrip type and the elements of the second type (19, 20) are elements of the wire type, the radiating elements of the first type (16) acting in a first frequency range and the radiating elements of the second type (19, 20) acting in a second frequency range. The invention is particularly applicable to microwave antennas.

Multifrequency array with composite radiators

Spacecraft payload architecture which includes an array (10) of radiating elements preceded by an amplification stage (17) and a focusing optical system (11), characterized in that the architecture is adapted to a telecommunication mission by taking into account the overall requirements of the system, namely the radiation performance required for the mission, efficient rating of the amplification stage and attractive overall balances.

Spacecraft payload architecture

The invention relates to a structure for making microwave circuits and components, in which the mechanical and electrical functions are integrated overall but dissociated locally. The invention is particularly suitable for space applications.

Structure for making microwave circuits and components

The present invention relates to a multifrequency antenna comprising a microstrip patch first antenna (10, 11, 12) operating at one or more frequencies, and a second antenna (17) disposed in front of the antenna and using the same radiating surface and operating at a different frequency. The invention is applicable, in particular, to space telecommunications.

Multifrequency antenna, useable in particular for space

The present invention relates to a stripline microwave module comprising: at least one first line situated in a first plane; at least one second line; and at least one coupling opening situated in a second plane so as to enable transmission to take place between the two lines. The invention is particularly suitable for space applications.

Stripline microwave module having means for contactless coupling between

The invention relates to a space reentry vehicle high-temperature skin antenna comprising a printed antenna embedded in a tile for providing thermal protection, and fed by electromagnetic coupling. The invention is particularly applicable to space telecommunications.

High temperature skin antenna

The present invention relates to an antenna which is electronically reconfigurable in transmission. The antenna comprises an array (11) of elementary sources, an energy-focusing reflector (10), with the array (11) being situated in the focal zone of the reflector, and control and feed electronics, the electronics comprising an amplifier stage (22) constituted by amplifiers (24) and including at least one generalized coupler disposed at the outputs of the amplifiers (24), and beam-forming circuits (20, 21) each corresponding to a transmitted beam, with the amplitude and relative phase of the signals leaving said circuits being controlled by respective adjustable phase shifters and adjustable attenuators. The invention is particularly applicable to space telecommunications.

Antenna which is electronically reconfigurable in transmission

The invention relates to an electronically scanned antenna comprising an array (11) of elementary sources, an energy-focusing reflector (10), and feed and control electronics; the array (11) is situated in the focal zone of the reflector, while the feed and control electronics includes a plurality of attenuator and phase shifter circuits (24) controlled by a control unit (27), with said circuits having their outputs connected to at least one combiner (28). The invention is particularly suitable for space telecommunications.

Electronically scanned antenna

The invention relates to a rotary microwave joint device comprising a main circular waveguide constituted by two portions (10, 11) situated as extensions to each other and rotatable relative to one another about their axis of symmetry, each of said two portions (10, 11) being provided with at least one access which is orthogonal thereto, and mechanical means enabling a circularly polarized wave to be obtained in the main waveguide. The invention is applicable to space telecommunications.

Growing community of inventors

Eaunes, France

Gerard Raguenet