Thomson Licensing

Institut Francais De Recherche Pour L'exploitation De La Mer (ifremer)

Ecole Nationale Superieure Des Telecommunications De Bretagne

Christian Person

Jean-Philippe Coupez

Ali Louzir

Dominique Lo Hine Tong

Corinne Nicolas

Julian Thevenard

Philippe Chambelin

Serge Pinel

Florent Averty

Philippe Minard

François Le Pennec

Christian Gac

Hector Fabian Guarnizo Mendez

Ronan Apprioual

Raymond Jezequel

Gabrielle Landrac

The invention relates to a wide-band omnidirectional antenna including at least a first conducting member and a second conducting member having a revolution symmetry about a common revolution axis and central openings, said members being arranged opposite each other, at least one member having a progressively flaring area, characterised in that it comprises a gap between the conducting members and a central coaxial excitation line so as to achieve a three-dimensional contactless transition between the coaxial excitation line and the conducting members and members for modifying the radiation pattern in the flaring area of the diode type for selectively radiating the gap depending on the on- or off-state of said diodes.

Omnidirectional volumetric antenna

The present invention relates to an underwater radio frequency antenna able to radiate in an underwater or equivalent propagation medium. It comprises a hollow conducting tube forming a resonant cavity, said conducting tube having an open end and a closed end, means of excitation of said resonant cavity which area able to be fed with signals and are arranged in such a way that the resonant cavity emits an electromagnetic radiation through said open end, at least one layer of dielectric material filling at least partially said resonant cavity so as to close the open end of the resonant cavity and render said cavity leaktight in relation to the underwater medium and to allow said electromagnetic radiation to pass through.

Underwater radio frequency antenna

The present invention relates to a planar antenna structure comprising at least one radiating element constituted by a longitudinal radiation slot etched onto a substrate. This structure comprises at least one modification element of the radiation pattern positioned in the radiation zone of the radiating element.

To planar antennas comprising at least one radiating element of the longitudinal radiation slot type

The disclosure relates to a planar antenna comprising at least one radiator element separated from a ground plane by a dielectric. The antenna also comprises an assembly of conductive studs which is connected to and extends from at least one element of a group of elements comprising the ground plane and at least one radiator element in such a way that at least one physical dimension of said at least one radiator element for a determined resonance frequency is reduced.

Planar antenna with conductive studs extending from the ground plane and/or from at least one radiating element, and corresponding production method

The invention concerns a method for making a waveguide microwave antenna with corrugated horn, which consists in forming the corrugations of the horn on the outer surface of a synthetic material form block followed by surface metallization of the foam block configured to produce the antenna.

Method for making a waveguide microwave antenna

The present invention relates to an interconnection system of a first substrate () comprising at least one first transmission line () with a second substrate () comprising at least one second transmission line (), the orientation of the first substrate with respect to the second substrate being arbitrary. The first substrate () comprises at least one metallized hole at one extremity of said first line and the second substrate () comprises a projecting element extending said second line and a ground saving, said projecting element being inserted into the metallized hole. The invention notably applies in the domain of microwaves and can interconnect a substrate comprising a printed antenna with a substrate receiving the processing circuits of the signal.

System for interconnecting two substrates each comprising at least one transmission line

The present invention relates to an element of transition between a waveguide and a transition line on a substrate. The element of transition comprises a securing flange on the substrate, the flange being dimensioned so that at least, in the direction microstrip line, the width d of the flange is selected in such a manner as to shift the resonant modes away from the useful band. The invention is used particularly for circuits using SMD techniques at millimeter frequencies.

Waveguide to microstrip line transition having a conductive footprint for providing a contact free element

The invention relates to a source antenna constituted by a radiating aperture comprising at least one insert made of a dielectric material mounted floating inside the aperture.

Source antennas with radiating aperture

The transition between a rectangular waveguide and a microstrip line consists of a ribbed rectangular waveguide realised in a foam bar in synthetic material of which the metallized base under the rib continues in the form of a foam plate constituting a substrate for the microstrip line, the rib having a base extending between the upper plane of the ribbed waveguide and the upper plane of the substrate and the microstrip line being disposed on the upper plane of the substrate in the continuation of the base of the rib.

Transition between a rectangular waveguide and a microstrip line comprised of a single metallized bar

The invention relates to a microwave filter comprising a coaxial structure, consisting of a tubular outer conductor and an inner bar conductor. According to the invention, the inner bar conductor extends in an axial direction inside the outer tube and, together with said tube, forms a series of concentric slots in the axial direction thereby defining successive coaxial line segments with low characteristic impedance and coaxial line segments with high characteristic impedance. The aforementioned concentric slots are produced in a synthetic foam block.

Microwave filter comprising a coaxial structure with a metallized foam having a periodic profile

A floating microwave filter in a waveguide structure comprises filtering elements sandwiched between two foam half-bars that are placed inside a waveguide. The filtering elements are metal features etched in the surface of one of the two foam half-bars and the waveguide is an internally hollowed-out block of foam having a metallized external surface.

Growing community of inventors

Locmaria Plouzane, France

Christian Person