AGENCE SPATIALE EUROPEENNE Patent applications |
Patent application number | Title | Published |
20160056770 | RADIO-FREQUENCY HIGH POWER AMPLIFIER WITH BROADBAND ENVELOPE TRACKING BY MEANS OF REVERSED BUCK CONVERTER - A radio-frequency power amplifier with envelope tracking, having a power RF amplifying device for amplifying a RF signal and a switching DC/DC converter for providing the power RF amplifying device with a DC power supply at a voltage level (VSUPP) proportional to an envelope of the RF signal, wherein the switching DC/DC converter has a reversed buck topology. Advantageously the switching device is a N-type GaN Field Effect Transistor having its drain connected to the ground. | 02-25-2016 |
20150331080 | Re-Entry Broadcasting Alert Apparatus, System and Method - A re-entry broadcasting alert apparatus having a housing provided with a heat shielda connector for attaching the housing to a space system and releasing it during atmospheric re-entry thereof; a geolocalisation receiver, for determining the position of the apparatus; a processor programmed to determine a hazard area on ground and/or in airspace, where debris from the space system are expected to fall, taking the position of the apparatus as input data; and a transmitter for broadcasting a signal carrying information defining the hazard area; the geolocalisation receiver, processor and transmitter being located within the housing. A re-entry alert receiving device, cooperating with the re-entry broadcasting alert apparatus. A re-entry broadcasting alert system having a re-entry broadcasting alert apparatus and at least a re-entry alert receiving device. A method of broadcasting re-entry alerts using such a system. | 11-19-2015 |
20150270891 | Uplink Power Control Method and Apparatus for Satellite Communications Networks - An Uplink Power Control method of adjusting an operating point of a High-Power Amplifier (HPA) of a ground-to-satellite emitter (GWj, GWk, GWl) as a function of propagation attenuation, characterized in that the method includes the steps of: a) determining an optimal Output Back Off value of the High-Power Amplifier which, for an operational propagation attenuation level, maximizes a Signal over Noise plus total interference ratio at the satellite taking into account contributions from cochannel and cross-polar interferences, intermodulation interferences and thermal noise; and b) setting the operating point of the High-Power Amplifier at the optimal Output Back Off value. A ground-to-satellite emitter comprising a High-Power Amplifier (HPA), a control means (PROC) for adjusting an operating point of said High-Power Amplifier by carrying out such a method. | 09-24-2015 |
20150188623 | Multibeam Satellite Communication System and Method, and Satellite Payload for Carrying Out Such a Method - A satellite communication system including a multibeam satellite for generating a plurality of feeder beams and a plurality of user beams over a region of interest, a plurality of spatially-separated gateway stations for providing feeder links to said multibeam satellite via respective feeder beams; and a control for operating said gateway stations and multibeam satellite such that: in nominal conditions, N | 07-02-2015 |
20150151854 | DEPLOYABLE TENSEGRITY STRUCTURE, ESPECIALLY FOR SPACE APPLICATIONS - A deployable structure comprises a first and second flexible tension members respectively defining a first and second contours of a ring. A first plurality of rigid compression members extends between the first and second contours. Only one end of each first plurality compression member is mounted on the first contour. A second plurality of rigid compression members extends between the first and second contours. Only one end of each second plurality compression member is mounted on the second contour. The first and second plurality of compression members are arranged with a repetitive crossing pattern around the ring. A first plurality of flexible tension members link each end of a compression member mounted on one of said contours to an end of another non-mounted compression member and a second plurality of flexible tension members link each end of a non-mounted compression member to an end of another non-mounted compression member. | 06-04-2015 |
20140104107 | Array Antenna Having A Radiation Pattern With A Controlled Envelope, And Method Of Manufacturing It - A method for manufacturing an array antenna having a design phase, including synthesizing an array layout of the array antenna and choosing or designing radiating elements to be arranged according to the array layout; and a phase of physically making the array antenna, including arranging the radiating elements according to the array layout; the design phase having the steps of: a) synthesizing an array layout complying with a required minimum beamwidth, a required field of view, a required side lobe level and a target angular dependence of the maximum directivity of the array antenna over the required field of view; b) determining shaped radiation patterns of the radiating elements in order to approximate said target angular dependence of the maximum directivity of the array antenna over the required field of view; and c) choosing or designing radiating elements having the shaped radiation patterns determined at step b). | 04-17-2014 |
20120286579 | ELECTRICAL POWER CONDITIONING UNIT AND SYSTEM - An electrical power conditioning for an electrical power conditioning system comprises a first terminal for connecting either an electrical power generator or a battery; a second terminal for connecting either a battery or an electrical power generator, respectively; a third terminal for connecting a power bus; characterized in that it further comprises: a reactive structure connected between said second terminal and the ground, formed by a serial connection of a first inductor, a capacitor and a second inductor, first and second nodes being provided between the first inductor and the capacitor, and between the capacitor and the second inductor, respectively; at least one output switching structure for connecting the third terminal to the first and second nodes through respective first and second switches and a third in-series inductor; and at least one input switching structure for connecting the first terminal to at least the first node through a third switch. | 11-15-2012 |
20120268340 | Aperiodic and Non-Planar Array of Electromagnetic Scatterers, and Reflectarray Antenna Comprising the Same - The application discloses a one or two dimensional array of electromagnetic scatterers n scatterers (ED), whereby the aforementioned scatterers (ED) are arranged aperiodically on a curved line or surface (S). Further, the application describes a reflectarray antenna comprising at least one such array of electromagnetic scatters (ED) and at least one receiving and/or transmitting feed (F), cooperating with said array to generate an antenna beam A method for designing and manufacturing said array and said antenna is explained. The method optimizes in a several stages all degrees of freedom in order improve the performance of reflectarrays, increase the flexibility thereof and/or the conformity thereof with design specifications (radio pattern) and/or allowing said specifications to be satisfied with a smaller number of scatters. | 10-25-2012 |
20120263163 | Automatic Identification System Receiver and Satellite Payload Comprising the Same - An Automatic Identification System—AIS—receiver comprising at least one processing section (PS | 10-18-2012 |
20120126627 | SOLAR ARRAY REGULATOR BASED ON STEP-UP AND DOWN CONVERSION AND SOLAR POWER SYSTEM COMPRISING THE SAME - A solar array system includes at least one solar array and at least one solar array regulator. The solar array regulator has an input port to be connected to the solar array, and an output port to be connected to a power bus. The solar array comprises a switching voltage converter comprising a step-down (PC | 05-24-2012 |
20120062323 | Radio-Frequency Power Amplifier with Fast Envelope Tracking - A radio-frequency power amplifier with envelope tracking, comprising: a power RF amplifying device for amplifying a RF signal; and a switching DC/DC converter, comprising a switching device and a rectifying device, for providing said power RF amplifying device with a DC power supply at a voltage level proportional to an envelope of said RF signal; wherein said switching device is a RF power transistor; characterized in that said rectifying device, and preferably also said power RF amplifying device, is also a transistor of a same technology, connected as a two-terminal device. Preferably, said power RF amplifying device is also a transistor of said same technology. A low-pass filter can also be provided for reducing the bandwidth of the envelope signal on which the PWM signal driving the DC/DC converter depends. | 03-15-2012 |
20110127972 | SEQUENTIAL SWITCHING SHUNT REGULATOR CELL WITH NON-REDUNDANT RECTIFIER - A sequential switching shunt regulator cell comprising: a power line (PL) for connecting a power source (SA) to a power bus (PB); a shunting (SSW) switch for shunting said power line; and driving means (DM) for opening or closing said shunting switch depending on an error signal (MEA) indicative of a voltage level of said power bus; characterized in that it also comprises: a non-redundant rectifier (D | 06-02-2011 |
20110033006 | METHOD FOR COMPENSATING SIGNAL DISTORTION IN AN EMITTING PAYLOAD - A method for compensating signal distortion in an emitting payload including determining a compensation transfer function and introducing it within the aggregate response of the payload; choosing an initial tentative compensation transfer function and introducing it within the aggregate response of the payload; acquiring an output signal of the emitting payload; based on the acquired output signal and on a reference signal, corresponding to an expected undistorted output signal, performing an estimation of a residual distortion transfer function of emitting payload; and based on the estimation of the residual distortion transfer function, computing an updated tentative compensation transfer function and introducing it within the aggregate response of the payload. The estimation can be a black-box estimating and the reference signal can be generated on-purpose, and not measured from within the emitting payload. | 02-10-2011 |
20100061427 | Method Of Processing Positioning Signals, In Particular For Indoor Applications - A method of processing positioning signal constituted by a superposition of individual signals generated by a plurality of emitters, in particular satellite emitters, comprising:—a first step of coarse acquisition of said individual signals, comprising correlation of the received positioning signal with locally generated replicas of said individual signals;—a step of identifying spurious correlation peaks induced by interferences; and—a step of estimating the code delays and the carrier frequency shifts of the acquired individual signals which are not affected by said interferences. According to preferred embodiments of the invention, the method can also comprise:—a refining step of determining more accurate estimates of said code delays and carrier frequency shifts; and—a step of interference cancellation. The method of the invention is particularly suitable to indoor positioning applications. | 03-11-2010 |