Abstract: A radar, flying device including such a radar, processing method in a radar embedded in a flying device and associated computer program are disclosed. In one aspect, the radar includes a transceiver antenna including a plurality of radiating elements configured to transmit and receive an electromagnetic wave. The radar includes an antenna gain control unit, by activating/inhibiting radiating elements, in transmission and/or reception configured to keep the reception level of an electromagnetic wave below a determined threshold below the saturation zone of the antenna, as well as by activating/inhibiting radiating elements in reception, configured to compensate the amplitude variation of the ground/sea clutter, over the duration of the reception.

Abstract: An elementary microstrip antenna includes a stack of layers, stacked in a direction z, the stack comprising: a first conductive radiating element of disc shape having a first centre, an axis in the direction z and passing through the first centre being called the central axis; a coupling assembly configured to couple an exciting device and the first radiating element, the coupling assembly comprising: a first slot comprising a centre called the slot centre located on the central axis; a second slot comprising a centre coincident with the slot centre, and substantially perpendicular to the first slot, the first and second slots each comprising circularly arcuate ends on the same circle centred on the slot centre; the slots and the stacked layers being configured so that a transverse footprint of the elementary antenna is disc-shaped.

Abstract: An array antenna (A) in a medium (M) comprises a plurality of radiating elements (ERT) ensuring the transition between the antenna and the medium, the reflectivity of each element depending on a parameter, the reflectivity of a first element being close to that of the medium, the reflectivity of a last element being close to that of the antenna, the reflectivity parameter of the elements varying from one element to the next. A method comprises calculation of a path equal to the sum of the variations of the reflectivity from one element to the next element, optimization of the variation of the reflectivity parameter so that equivalent radar cross-section of the antenna is the lowest possible or the antenna best observes the radiation objectives, determination of the different elements as a function of said parameter, and simulation of the overall reflectivity and/or of the radiation of the antenna.

Abstract: An array antenna (A) in a medium (M) comprises a plurality of radiating elements (ERT) ensuring the transition between the antenna and the medium, the reflectivity of each element depending on a parameter, the reflectivity of a first element being close to that of the medium, the reflectivity of a last element being close to that of the antenna, the reflectivity parameter of the elements varying from one element to the next. A method comprises calculation of a path equal to the sum of the variations of the reflectivity from one element to the next element, optimization of the variation of the reflectivity parameter so that equivalent radar cross-section of the antenna is the lowest possible or the antenna best observes the radiation objectives, determination of the different elements as a function of said parameter, and simulation of the overall reflectivity and/or of the radiation of the antenna.

Abstract: A radar, flying device including such a radar, processing method in a radar embedded in a flying device and associated computer program are disclosed. In one aspect, the radar includes a transceiver antenna including a plurality of radiating elements configured to transmit and receive an electromagnetic wave. The radar includes an antenna gain control unit, by activating/inhibiting radiating elements, in transmission and/or reception configured to keep the reception level of an electromagnetic wave below a determined threshold below the saturation zone of the antenna, as well as by activating/inhibiting radiating elements in reception, configured to compensate the amplitude variation of the ground/sea clutter, over the duration of the reception.

Abstract: An electronic-scanning antenna composed of radiating elements each forming an active channel in which the signals arising from the channels are grouped together to form deviometry signals, each deviometry signal forming a deviometry channel, and are grouped together according to sectors to form a sector-based signal forming a sector channel, a computation-based beam being formed on the basis of the signals arising from each of the sectors, the method comprises the following steps: measuring the response to a calibration signal of each active channel at one and the same time on the sum deviometry channel and on the sector channel to which it belongs, the responses on the sum channel to obtain the calibration of the sum channel; computing, for each active channel, the disparity between the mean of the responses measured on the sum channel and the mean of the responses measured on the sector to which it belongs; in the operational phase, forming the beam by computation on the basis of the measurements of the sig

Abstract: This method involves, for an array of at least two antennas pointing in different directions and the respective radiation patterns of which overlap one another, each antenna including at least two radiating elements so as to be able to work in a first operating mode associated with a first radiation pattern (?) and according to a second operating mode associated with a second radiation pattern (?): acquiring, for each antenna, a first signal (S?i) corresponding to the first operating mode and a second signal (S?i) corresponding to the second operating mode; determining, for each antenna, an opening half-angle (?i) of a cone of possible directions of incidence from the amplitude of the first and second signals; calculating the bearing angle (?0) and/or the elevation angle (?0) of the direction of incidence by intersection of the cones of possible directions of incidence determined for each antenna.

Abstract: The invention relates to an electromagnetic antenna having a first electromagnetic waveguide radiating part of predetermined geometric shape, forming a first electromagnetic propagation medium and having, a first radiation wall having a plurality of spaced-apart radiating slots, each radiating slot extending in a first longitudinal direction, and a second wall, opposite the first wall. The antenna has a second active part comprising a stack of at least two dielectric layers, at least one of the dielectric layers being etched with at least one metal track, resulting in at least one active circuit, forming a second electromagnetic propagation medium, at least one portion of said second active part being pressed against said second wall in a contact area. A coupling slot is situated in said contact area, the coupling slot passing through said second wall and extending in a second direction forming a nonzero angle of orientation with said first longitudinal direction.

Abstract: A transceiver device and associated antenna are disclosed. In one aspect, the transceiver device combines first and second transceiver modules with a transceiver capability including a substantially planar radiating element and including a central point. Each transceiver module is a transceiver module coupled with the transceiver capability so as to excite a pair of excitation points of the radiating element, the excitation points of one pair being arranged symmetrically relative to the central point of the radiating element. The first and second transceiver modules respectively excite a first pair of excitation points arranged in a first direction of the radiating element and a second pair of excitation points arranged in a second direction of the radiating element, the first and second directions being mutually orthogonal.

Abstract: An electronic-scanning antenna composed of radiating elements each forming an active channel in which the signals arising from the channels are grouped together to form deviometry signals, each deviometry signal forming a deviometry channel, and are grouped together according to sectors to form a sector-based signal forming a sector channel, a computation-based beam being formed on the basis of the signals arising from each of the sectors, the method comprises the following steps: measuring the response to a calibration signal of each active channel at one and the same time on the sum deviometry channel and on the sector channel to which it belongs, the responses on the sum channel to obtain the calibration of the sum channel; computing, for each active channel, the disparity between the mean of the responses measured on the sum channel and the mean of the responses measured on the sector to which it belongs; in the operational phase, forming the beam by computation on the basis of the measurements of the sig

Abstract: A transceiver device and associated antenna are disclosed. In one aspect, the transceiver device combines first and second transceiver modules with a transceiver capability including a substantially planar radiating element and including a central point. Each transceiver module is a transceiver module coupled with the transceiver capability so as to excite a pair of excitation points of the radiating element, the excitation points of one pair being arranged symmetrically relative to the central point of the radiating element. The first and second transceiver modules respectively excite a first pair of excitation points arranged in a first direction of the radiating element and a second pair of excitation points arranged in a second direction of the radiating element, the first and second directions being mutually orthogonal.

Abstract: This method involves, for an array of at least two antennas pointing in different directions and the respective radiation patterns of which overlap one another, each antenna including at least two radiating elements so as to be able to work in a first operating mode associated with a first radiation pattern (?) and according to a second operating mode associated with a second radiation pattern (?): acquiring, for each antenna, a first signal (S?i) corresponding to the first operating mode and a second signal (S?i) corresponding to the second operating mode; determining, for each antenna, an opening half-angle (?i) of a cone of possible directions of incidence from the amplitude of the first and second signals; calculating the bearing angle (?0) and/or the elevation angle (?0) of the direction of incidence by intersection of the cones of possible directions of incidence determined for each antenna.

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: An antenna comprises a plurality of tiles forming an antenna plane, each of said tiles comprising a plurality of radiating elements. Each radiating element comprises a metallic upper patch disposed above a metallic lower patch, the two patches being separated by a layer insulating them electrically. The lower patch is fed with electric current. Each radiating element comprises a conducting frame disposed parallel to the antenna plane and framing the two patches of said element, the two so-called patches being coupled electromagnetically through the aperture of said frame whose body comprises a rear face of small cross section disposed on the side of the lower patch and a front face of larger cross section disposed on the side of the upper patch, so as to widen the angular scan field of a beam in a plane orthogonal to the antenna plane.

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: An antenna comprises a plurality of tiles forming an antenna plane, each of said tiles comprising a plurality of radiating elements. Each radiating element comprises a metallic upper patch disposed above a metallic lower patch, the two patches being separated by a layer insulating them electrically. The lower patch is fed with electric current. Each radiating element comprises a conducting frame disposed parallel to the antenna plane and framing the two patches of said element, the two so-called patches being coupled electromagnetically through the aperture of said frame whose body comprises a rear face of small cross section disposed on the side of the lower patch and a front face of larger cross section disposed on the side of the upper patch, so as to widen the angular scan field of a beam in a plane orthogonal to the antenna plane.

Abstract: An array antenna includes radiating elements distributed in sub-arrays, the sub-arrays being fed via substantially identical amplifiers operating at an identical level. The radiating elements of one and the same sub-array are distributed non-uniformly in space, the distance between two adjacent radiating elements being dependent on the law of illumination desired for said array antenna and the technical characteristics of the sub-arrays.

Abstract: An electromagnetic lens comprises two conductive sides between which there is arranged a cavity provided in its lateral portion with electromagnetic input/output coupling transitions to authorize a set of propagation laws between pairs of such inputs/outputs. Moreover, it comprises, substantially centered in the cavity, a substrate comprising a printed conductive patch of predetermined dimensions, so that the two conductive sides and the patch thus create a suspended three-plate strip line structure. The content of the cavity and the respective geometries of the cavity and of the conductive patch are chosen to comply with the propagation laws.

Abstract: A two-directional network antenna includes N parallel and juxtaposed arrays of antenna elements respectively connected to electronic transmission/receiving circuits by an ultrahigh frequency connecting device with phase shifts controlled by a control device. The ultrahigh frequency connecting device comprises N transmission lines respectively associated with N arrays of antenna elements, each transmission line having outputs in propagation lengths which are staggered in relation to their input, which outputs are connected to respective antenna elements of the associated array. The ultrahigh frequency connecting device further comprises at least one electromagnetic lens with P inputs and N outputs respectively connected to N inputs of the transmission lines.