Abstract: A configurable deflection system for an incident microwave frequency beam exhibiting a wavelength contained in a band of wavelengths corresponding to the microwave frequencies, comprising: a first and a second diffractive dielectric component suitable for each performing a rotation about a rotation axis Z, the deflection system being suitable for generating a microwave frequency beam by diffraction of the incident microwave frequency beam on the first and second components, the microwave frequency beam being oriented according to an angle that is a function of the angular positioning between the first and said second diffractive components, the first and second components respectively exhibiting a first and second periodic structure of first and second periods according to a first and second axis, the first and second structures respectively comprising a plurality of first and second primary microstructures formed respectively on a first and second substrate of first and second substrate refractive indices.

Abstract: A configurable deflection system for an incident microwave frequency beam exhibiting a wavelength contained in a band of wavelengths corresponding to the microwave frequencies, comprising: a first and a second diffractive dielectric component suitable for each performing a rotation about a rotation axis Z, the deflection system being suitable for generating a microwave frequency beam by diffraction of the incident microwave frequency beam on the first and second components, the microwave frequency beam being oriented according to an angle that is a function of the angular positioning between the first and said second diffractive components, the first and second components respectively exhibiting a first and second periodic structure of first and second periods according to a first and second axis, the first and second structures respectively comprising a plurality of first and second primary microstructures formed respectively on a first and second substrate of first and second substrate refractive indices.

Abstract: The present invention relates to the production of reflectarray antennas, that is to say antennas consisting of a primary illumination source and a phase-shifting plate consisting of an array of cells each having a coefficient of reflection the phase of which is electronically controlled. According to the invention, each cell consists of a waveguide element closed at one of its ends by a dielectric substrate wafer carrying an electrical circuit formed by three parallel conducting strips. A variable capacitor, produced either in MEMS technology or by means of a ferroelectric element, is implanted by means of bonding wires on the electrical circuit etched on the substrate.

Abstract: The present invention relates to the production of reflectarray antennas, that is to say antennas consisting of a primary illumination source and a phase-shifting plate consisting of an array of cells each having a coefficient of reflection the phase of which is electronically controlled. According to the invention, each cell consists of a waveguide element closed at one of its ends by a dielectric substrate wafer carrying an electrical circuit formed by three parallel conducting strips. A variable capacitor, produced either in MEMS technology or by means of a ferroelectric element, is implanted by means of bonding wires on the electrical circuit etched on the substrate.

Abstract: This invention relates to an apparatus for emission and/or reception of electromagnetic waves for aerodynes, characterised in that it comprises a blade antenna on the top of the fuselage of the aerodyne, a principal reflect-array arranged horizontally at the bottom of the blade antenna, a principal illumination horn arranged at the summit of the blade antenna, the horn illuminating the principal reflect-array, two secondary reflect-arrays arranged vertically on each side of the faces of the blade antenna, two secondary illumination horns arranged at the bottom of the blade antenna in the plane of the principal reflect-array, each horn illuminating one of the secondary reflect-arrays, each reflect-array reflecting waves emitted by the illumination horn illuminating it.

Abstract: This invention relates to an apparatus for emission and/or reception of electromagnetic waves for aerodynes, characterised in that it comprises a blade antenna on the top of the fuselage of the aerodyne, a principal reflect-array arranged horizontally at the bottom of the blade antenna, a principal illumination horn arranged at the summit of the blade antenna, the horn illuminating the principal reflect-array, two secondary reflect-arrays arranged vertically on each side of the faces of the blade antenna, two secondary illumination horns arranged at the bottom of the blade antenna in the plane of the principal reflect-array, each horn illuminating one of the secondary reflect-arrays, each reflect-array reflecting waves emitted by the illumination horn illuminating it.

Abstract: A device to conceal a radar or any other system for the transmission and reception of electromagnetic waves represents, for example, a pattern in relief. The device comprises at least one front part transparent to electromagnetic and optical waves, one rear part transparent to electromagnetic waves facing transmission and/or reception means and a form representing the manufacturer's logo placed between the parts. This form has an cellular structure with RF characteristics close to those of air. That device can be applied especially in radars equipping vehicles.

Abstract: Disclosed is a device to conceal a radar fitted for example into a vehicle. This device bears especially a pattern. A method to make such a device is also disclosed. The device reproduces a given pattern comprising a shiny part. It comprises at least one front part transparent to optic waves and one part having a face with a shiny appearance before the rear face of the front part. The non-shiny part of the pattern covers the rear face of the front part. The invention can be applied especially to radars positioned on the front of vehicles. The cover then reproduces the manufacturer's logo.

Abstract: A device to conceal a radar fitted into an automobile comprises at least one system of conductive wires perpendicular to the polarization of the wave sent out by the radar and reproducing a given graphic representation The graphic representation may be the automobile manufacturer's logo. The disclosed device can be applied especially to radars positioned in from of vehicles, for example of the ACC type.

Abstract: A monopulse source for a focal feed antenna including at least two waveguides machined in a metal flange supporting a microwave transmission and reception circuit of the antenna, and a dielectric substrate on the metal flange. Also included is a microwave short-circuit having an opening with a smaller dimension than a dimension of a respective waveguide. The microwave short-circuit is mounted on the dielectric substrate such that an axis of the microwave short-circuit coincides with an axis of the respective waveguide. Further, a transition positioned on the dielectric substrate and within the opening of the microwave short-circuit is configured to couple the respective waveguide.

Abstract: An auto-test device for a radar includes at least one transducer located in the field of radiation of the radar microwave transmission, the transducer being configured to intersect a part of the radiated energy and to send it back to a receiver so as to create, in the receiver, a test signal modulated by beats of the transducer. The device further includes a synchronism mechanism configured to excite the transducer in synchronism with a sub-multiple of the frequency of sampling of a reception signal. The transducer is placed such that the receiver receives a test signal with a mean value close to zero.

Abstract: A load for a stripline integrated into a three-plate structure is formed by a resonant cavity filled with absorbent material. The resonant cavity is defined by metallized holes extending through the three plates. The holes are spaced no more than 1/4 wavelength apart and can extend along the length of the stripline to form an opening of the resonant cavity. The structure of the load allows its size to have the same height and width of the stripline.