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公开(公告)号：US20240291126A1
公开(公告)日：2024-08-29
申请号：US18574430
申请日：2022-07-01
发明人： Walter Steffe'
摘要： A fully-reconfigurable coaxial filter is provided that includes coaxial resonators mounted such that both opposite ends are coupleable to corresponding tuners, first tuners made of dielectric material, each first tuner being slidably mounted at a first end of a corresponding coaxial resonator to be movable relative to the first end to form a dielectric of a capacitive load, and second tuners made of dielectric material, each second tuner being slidably mounted at a second end of a corresponding coaxial resonator to be movable relative to the second end to form a dielectric of a capacitive load associated with the second end of the corresponding coaxial resonator. The first and second tuners are movable relative to the corresponding coaxial resonator so as to tune the capacitive loads associated with the opposite ends of the coaxial resonator and, resultingly, a resonant frequency and mutual coupling coefficient of the coaxial resonator.
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公开(公告)号：US11526396B2
公开(公告)日：2022-12-13
申请号：US16612959
申请日：2018-05-11
摘要： The invention relates to an interconnection network for forward error correction encoders and decoders, including N input terminals, N output terminals, and M stages. Each stage includes switching elements having input pins and output pins. The input pins of the switching elements of the first stage are connected to the input terminals, and the output pins of the switching elements of the last stage are connected to the output terminals. The input and output pins of the switching elements of immediately successive stages are connected in a hardwired fashion so as to form a plurality of interconnection sub-networks for routing respective input values from respective output pins of the switching elements of the first stage to respective input pins of the switching elements of the last stage.
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公开(公告)号：US11407532B2
公开(公告)日：2022-08-09
申请号：US16640678
申请日：2018-08-23
IPC分类号： B64G1/64
摘要： The invention concerns a satellite deployment system (30) for launch vehicles. Said satellite deployment system (30) comprises an outer dispenser (31) that is fitted, externally, with first releasable attachment means for releasably attaching first satellites (81) to said outer dispenser (31) and, internally, with an internal housing volume (310). Moreover, the satellite deployment system (30) further comprises at least an inner dispenser (32,33) that is externally fitted with second releasable attachment means for releasably attaching second satellites (82,83) to said inner dispenser (32,33), and that is accommodated in the internal housing volume (310) of the outer dispenser (31).
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公开(公告)号：US20220214449A1
公开(公告)日：2022-07-07
申请号：US17602596
申请日：2020-04-09
发明人： Diego Calabrese
IPC分类号： G01S13/90
摘要： The present invention concerns a method for performing SAR acquisitions, which comprises performing SAR acquisitions in Spotlight/Stripmap mode of areas/swaths of earth's surface by means of a SAR system carried by an air or space platform along a flight direction, whereby: an azimuth direction is defined by a ground track of the flight direction on the earth's surface, a nadir direction is defined that is orthogonal to the earth's surface, to the flight direction and to the azimuth direction, an across-track direction is defined that lies on the earth's surface and is orthogonal to the azimuth direction and to the nadir direction, and, for each acquired area/swath of the earth's surface, a respective range direction is defined that extends from the synthetic aperture radar system to said acquired area/swath. Performing SAR acquisitions in Spotlight/Stripmap mode of areas/swaths of earth's surface includes contemporaneously acquiring P areas or portions of P swaths in a pulse repetition interval having a predefined time length, P being an integer greater than one. Said P areas/swaths are separated along the across-track direction and are spaced apart from each other along the across-track direction and from the SAR system along the respective range direction by predefined distances. Said predefined time length and said predefined distances are such that to enable contemporaneous acquisition of said P areas or of portions of said P swaths in said pulse repetition interval.
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公开(公告)号：US20210396866A1
公开(公告)日：2021-12-23
申请号：US17292761
申请日：2019-11-12
摘要： A localization method for locating a target that is coupled with a locator transponder associated with a permanent identification code permanently assigned to the locator transponder is provided. The localization method includes: a) transmitting a spread spectrum paging signal carrying the permanent identification code and a shorter temporary identification code temporarily assigned to the locator transponder; b) receiving the spread spectrum paging signal and extracting the temporary identification code carried by the received spread spectrum paging signal; c) transmitting radar signals towards area(s) of earth's surface or sky and receiving echo signals therefrom; d) upon reception by the locator transponder of radar signal(s), generating and transmitting a sequence of watermarked radar echo signals in which a spread spectrum watermarking signal is embedded that includes the temporary identification code; e) carrying out localization operations; f) transmitting frequency-synchronization-aid signal(s); g) receiving the frequency-synchronization-aid signal(s) and estimating a frequency drift affecting a reference frequency provided by a local oscillator of the locator transponder; wherein the locator transponder transmits the sequence of watermarked radar echo signals by using a transmission carrier frequency obtained based on the reference frequency provided by the local oscillator and on the estimated frequency drift.
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公开(公告)号：US20190196005A1
公开(公告)日：2019-06-27
申请号：US16309061
申请日：2017-06-21
CPC分类号： G01S13/9023 , G01S7/04 , G01S7/4021 , G01S7/4026 , G01S2007/403
摘要： A SAR imaging method for interferometric analyses is provided, including: receiving raw SAR data related to two or more SAR acquisitions of one and the same area of the earth's surface carried out by one or more synthetic aperture radars; and processing the raw SAR data to generate SAR images. For each SAR acquisition, the respective raw SAR data is processed based on two different sets of processing parameters: a first set that is the same for all the SAR acquisitions and which comprises focusing Doppler parameters computed based on physical Doppler parameters related to all the SAR acquisitions; and a second set which comprises respective radiometric equalization Doppler parameters related to the SAR acquisition and computed based on respective physical Doppler parameters related to the SAR acquisition. Processing includes: focusing the raw SAR data related to all SAR acquisitions based on the focusing Doppler parameters and, for each SAR acquisition, applying a respective radiometric equalization, based on the respective radiometric equalization Doppler parameters, to the respective SAR data to compensate for possible differences in pointing of the synthetic aperture radar(s), without degrading azimuth resolution and without introducing radiometric distortions.
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公开(公告)号：US20230141538A1
公开(公告)日：2023-05-11
申请号：US17916179
申请日：2021-05-26
IPC分类号： B64G1/64
摘要： A release system for the release of satellites from a launch vehicle is provided that includes: (i) a torsion bar, having a first end which is fixed by means of support means to a launch vehicle and is locked in rotation around a longitudinal axis of the torsion bar, and a second end which is connected by means of hinge means to the launch vehicle and is free to rotate around the longitudinal axis; (ii) at least one launch arm extending perpendicularly from the torsion bar and comprising (a) a torsion lever having a first end which is fixed to the torsion bar in an integral manner, and (b) a guide having a first end connected to a second end of the torsion lever, and a second free end; (iii) at least one slider which is fixed in an integral manner to a satellite to be launched and arranged to engage the guide in a sliding manner; and (iv) and a limit stop element designed to act upon the torsion lever to stop the rotation of the launch arm around the longitudinal axis.
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公开(公告)号：US20230125396A1
公开(公告)日：2023-04-27
申请号：US17801659
申请日：2021-02-23
发明人： Giorgio Boscheri , Ilaria Locantore , Giovanni Andrea Medolago Albani , Alessandro Medolago Albani , Pietro Medolago Albani , Federico Alessandro Medolago Albani
摘要： A passive cyclone separator to treat a fluid in a microgravity environment to separate a liquid phase of the fluid from a gas phase of the fluid, comprising a tubular body having a longitudinal axis and internally defining a separation chamber within which the gas phase of the fluid is separable, in use, from the liquid phase of the fluid; an inlet opening through which the fluid is injectable, in use, into the separation chamber along an injection axis; a liquid phase outlet opening, through which the liquid phase separated from the gas phase exits, in use, the separation chamber; and a gas phase outlet opening, through which the gas phase separated from the liquid phase exits, in use, the separation chamber; the injection axis is inclined towards the liquid phase outlet opening so as to define a non-zero fluid injection angle with a direction orthogonal to the longitudinal axis.
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公开(公告)号：US20220402631A1
公开(公告)日：2022-12-22
申请号：US17769848
申请日：2020-10-19
发明人： Giorgio Fasano , Enrico Gaia , Stefano Ferroni , Mario Pessana
摘要： An on-orbit servicing spacecraft includes an engagement system to engage a space vehicle or object to be serviced or tugged, so as to form a space system, and an electronic reaction control system to cause the spacecraft to rotate about roll, yaw, and pitch axes to control attitude and displacement along given trajectories to cause the spacecraft to carry out given maneuvers. The electronic reaction control system includes (i) a sensory system to directly sense physical quantities or allow physical quantities to be indirectly computed based on sensed physical quantities, including one or more of position, attitude, angular rates, available fuel, geometrical features, and on-board systems state, (ii) attitude control thrusters mounted so as to allow their positions and orientations to be adjustable, and (iii) an attitude control computer in communication with the sensory system and the attitude control thrusters and programmed to receive data from the sensory system and to control, based on the received data, positions, orientations, and operating states of the attitude control thrusters so as to control attitude and position of the spacecraft. The attitude control computer is programmed to cause the spacecraft to carry out a given mission including an engagement step, in which the engagement system and the attitude control thrusters are controlled by the attitude control computer to engage a space vehicle or object to be serviced or tugged, and one or more operating steps, in each of which the attitude control thrusters are controlled by the attitude control computer to meet one or more requirements established for the operating step.
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公开(公告)号：US20220187445A1
公开(公告)日：2022-06-16
申请号：US17602554
申请日：2020-04-09
发明人： Diego Calabrese
IPC分类号： G01S13/90
摘要： The present invention concerns a method for performing SAR acquisitions, which comprises performing, in a time division fashion, SAR acquisitions of areas of a swath of earth's surface by means of a SAR system carried by an air or space platform; wherein performing SAR acquisitions in a time division fashion includes contemporaneously acquiring, in each pulse repetition interval, a plurality of areas of the swath that are separated in azimuth; and wherein the areas acquired in T successive pulse repetition intervals form an azimuth-continuous portion of said swath, T being an integer greater than one.
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