Abstract: An antenna arrangement includes a directional antenna assembly, the directional antenna assembly comprising a directional antenna intended to be mounted on an interface delimited by a stationary support structure, the directional antenna generally extending according to a main axis perpendicular to the plane defined by the interface, wherein the antenna arrangement further comprises a rotatable base mounted on the interface, the rotatable base comprising a pole integral with the rotatable base, the pole extending in the direction of the main axis, the rotatable base being rotatable about the main axis 11, a rotation of the rotatable base actuating the rotation of the pole about the main axis.

Abstract: There is disclosed a method for determining the impact point of a projectile fired at a target (15) tracked by use of a radar antenna (11) through a dedicated antenna beam, the method being characterized in that it comprises at least a step of measuring the range and bearing of the projectile based upon the use of said radar antenna (11) and said dedicated antenna beam, a step of Doppler filtering distinguishing the projectile measurements from the tracked target (15) and sea clutter measurements, and a step of determining the projectile trajectory (131) from a plurality of range and bearing measurements performed at successive instants of time (ti), and a step of determining the impact point of the determined projectile based upon the projectile trajectory (131). The current invention can be applied to splash spot location prediction and miss distance indication.

Abstract: A decision support method for use by an operator surrounded by adverse entities in a battlefield environment comprises generating a layered representation of the physical environment surrounding the operator from sensor information by mapping the spherical physical environment of the operator into a geometrical representation suitable for display on a screen, the representation being segmented into a plurality of layers having respective sizes, each layer being associated with a respective category of tactical actions. The representation further comprises visual elements representing adverse entities in the surrounding physical environment of the operator, each visual element being represented so as to be superposed with a given layer.

Abstract: The current invention relates to a pivot linkage device comprising at least one rolling bearing comprising at least one inner cage, one outer cage and a plurality of rolling elements denoted as the bearing components, the device further comprising means for protection against high voltage transients, wherein said protection means are exclusively formed by said bearing components, said bearing components being loaded by loading means arranged in such a manner that a direct electrical connection exists between these components. The current invention also relates to a method for protecting a bearing against high voltage transients by applying a preloading to the bearing's components.

Abstract: System (1) for characterizing motion of at least one individual forming a target, comprising a radar emitting electromagnetic signals towards the target and receiving echoed signals, output as radar data, preprocessing means (11) receiving radar data as input and outputting a spectrogram representing time variations of the Doppler spectrum of the radar data, characterizing means (13) configured for outputting a probability density estimation of the state of a target, state means a vector of properties from a target, referred to as state vector, the system being characterized in that said state vector comprises at least one discrete target gait classification variable determining one target gait model among a set of determined target gait models, and a set of discrete and/or continuous motion parameters, the characterizing means comprising estimation means estimating the probability density of said state vector from said spectrogram.

Abstract: The current invention relates to a system for fast and accurate filling of a two-phase cooling device, comprising a binding device (30) intended to be hermetically mounted onto the cooling device, the binding device (30) comprising a through-hole (32) able to be in fluid contact with the cooling device, said through-hole (32) being extending between a lower surface adapted to the cooling device's surface, and an essentially plane upper surface, the binding device (30) further comprising a gripping head essentially level with said upper surface, allowing for a filling tool (400) to be put in hermetic contact with said upper surface. In a preferred embodiment, the through-hole (32) can be hermetically sealed by forced insertion of a pin-shaped plug (33). The invention also relates to the filling tool (400) to be used in combination with the binding device (30), allowing gas removal from the cooling device, filling of a working fluid, and hermetic sealing of the cooling device.

Abstract: There is disclosed a device comprising two wire rope isolators for isolating an object from external motions. The wire rope isolators are arranged such that, if one of the two wire rope isolators is loaded in compression, then the other wire rope isolator is loaded in tension.

Abstract: There is disclosed a device comprising two wire rope isolators for isolating an object from external motions. The wire rope isolators are arranged such that, if one of the two wire rope isolators is loaded in compression, then the other wire rope isolator is loaded in tension.

Abstract: There is disclosed a broadband HF antenna, which is fully integrated on a naval ship. This antenna enables to transmit and/or receive radio-frequency waves from a naval ship. The antenna comprises a radiating element and an exciting element. The exciting element excites the radiating element when fed with current. The radiating element is a structural element of the ship itself.

Abstract: There is disclosed a device comprising two wire rope isolators for isolating an object from external motions. The wire rope isolators are arranged such that, if one of the two wire rope isolators is loaded in compression, then the other wire rope isolator is loaded in tension.

Abstract: A surveillance system for detecting targets comprises a radar antenna mounted on a blade of a windmill.

Abstract: A method for estimating the position and the speed of a target with a radar is provided. The radar emits a waveform including a train of pulses, each pulse having an OFDM chip constructed from subcarriers, the subcarriers covering the whole bandwidth of the radar. Upon receipt of the echoed pulses, some of the subcarriers are used in a step of Doppler processing, each of the subcarriers being fixed over the pulses. Upon receipt of the echoed pulses, other subcarriers, which are not used for Doppler processing, are used in a step of High Range Resolution processing, the subcarriers being randomly distributed over the pulses.

Abstract: System (1) for characterizing motion of at least one individual forming a target, comprising a radar emitting electromagnetic signals towards the target and receiving echoed signals, output as radar data, preprocessing means (11) receiving radar data as input and outputting a spectrogram representing time variations of the Doppler spectrum of the radar data, characterizing means (13) configured for outputting a probability density estimation of the state of a target, state means a vector of properties from a target, referred to as state vector, the system being characterized in that said state vector comprises at least one discrete target gait classification variable determining one target gait model among a set of determined target gait models, and a set of discrete and/or continuous motion parameters, the characterizing means comprising estimation means estimating the probability density of said state vector from said spectrogram.

Abstract: Electronic circuitry includes a circuit board and at least one component mounted on the circuit board, with the at least one component generating heat while in use. The circuit board includes one or more apertures aligned with one or more respective components, and the electronic circuitry is configured to provide, while in use, a path for coolant fluid to flow through each aperture and past the respective component.

Abstract: The invention relates to a safety and security system designed to protect a designated area. The system comprises sensors of various types (radars, infrared detectors for instance) and sources of intelligence. Correlation is run between instant-track data and non-instant-track data before the level of threat of the tracks is analyzed. Reliability of this analysis is thus greatly enhanced. Also a method is provided to develop systems of this type which provides an integrated specification and design method which covers technical and human factors.

Abstract: An apparatus for estimating a height at which a target flies over a reflective surface. The apparatus includes means for emitting a signal, and means for receiving signals, including the emitted signal after it has been echoed by the target. The apparatus also includes a height estimator configured to estimate the height by utilizing a direct signal coming directly from the target after the emitted signal has been echoed by the target, an indirect signal coming indirectly from the target after the emitted signal has been echoed by the target and has been reflected by the surface, and reflection parameters including at least one of an amplitude of a reflection coefficient of the surface and a phase difference between the direct signal and the indirect signal. The height estimator comprises a particle filter configured to dynamically estimate the reflection parameters.

Abstract: An apparatus for emitting and receiving radio-frequency signals includes a circuit to cancel interference. The apparatus transmits and receives signals using an antenna, and isolates the transmission and receiving circuitry. The circuit taps a first part of a signal to be transmitted, and controls the amplitude and phase of this signal. The circuit then introduces the first part of the signal into the receiver after the first part of the signal has been amplified and phase-shifted, so as to cancel in the receiver interference due to portions of the signal that have undesirably entered the receiver.

Abstract: An apparatus or a method for preventing radio-frequency (RF) interferences between rotating antennas. For example, the invention is particularly applicable to radar and communication systems on board naval ships.

Abstract: There is disclosed an apparatus for measuring the strength of an electromagnetic field. The apparatus comprises a plurality of antennas arranged such that the field is received from all directions, each antenna supplying an RF signal as output. The apparatus also comprises a plurality of transforming modules, each of said modules being fed with the RF signal supplied by one of the antennas, each of said modules transforming the impedance of the RF signal it receives as input, so as to supply another RF signal as output. The apparatus also comprises a plurality of converting modules, each of said modules being fed with the RF signal supplied by one of the transforming modules, each of said modules converting the RF signal it receives as input into a DC current it supplies as output, said DC current varying substantially as a logarithmic function of the said RF signal.

Abstract: A surveillance system for detecting targets with high cross-range resolution between targets. The system includes at least two radar antennae mounted on blades of a windmill and is configured to apply a compressive sensing technique when the blades do not rotate.