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71.发明授权公开(公告)号：US11276937B2
公开(公告)日：2022-03-15
申请号：US17157722
申请日：2021-01-25
申请人： VIASAT, Inc.
发明人： Frederic Bongard , Stefano Vaccaro
摘要： A waveguide structure for a compact and scalable dual-polarized antenna array. In one example, a waveguide device comprises septum polarizers dividing common waveguides into first waveguides associated with a first polarization and second waveguides associated with a second polarization. The sets of septum polarizers may be inverted relative to each other to form first groups of four adjacent first waveguides for each type of waveguide. The waveguide device may also include a waveguide feed network including a first waveguide feed stage including waveguide combiner/dividers coupled between the four adjacent waveguides intermediate waveguides. The waveguide device may further include a second waveguide feed stage coupled with the first intermediate waveguides and the second intermediate waveguides, wherein the second waveguide feed stage extends in a direction perpendicular to the first waveguide feed stage.
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公开(公告)号：US11258472B2
公开(公告)日：2022-02-22
申请号：US16960823
申请日：2019-02-01
申请人： VIASAT, INC.
摘要： Methods and devices for radio frequency (RF) loopback for transceivers are described. A transceiver for communicating RF signals with a target device may transmit signals at a transmit frequency and receive signals at a (different) receive frequency. The transceiver may include a waveguide diplexer for separating and combining signals based on frequency. The transceiver may be configured to couple a loopback signal from a common port of the waveguide diplexer; the loopback signal may be based on a transmit signal. The transceiver may include a loopback translator to translate the loopback signal from the transmit frequency to the receive frequency and provide the translated loopback signal to a receiver used for receiving signals from the target device. The receiver may compare the translated loopback signal with a representation of the transmit signal to generate a compensation signal. A transmitter may use the compensation signal to adjust subsequent transmit signals.
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公开(公告)号：US11245196B2
公开(公告)日：2022-02-08
申请号：US17132427
申请日：2020-12-23
申请人： VIASAT, INC
发明人： Anders Jensen , Donald L. Runyon
IPC分类号： H01Q15/16 , H01Q5/55 , H01P5/12 , H01Q13/02 , H01P5/16 , H01P1/17 , H01Q19/17 , H01Q5/35 , H01Q19/08 , H01Q3/08
摘要： An antenna includes a reflector and a waveguide assembly. The waveguide assembly includes a feed assembly and a support member that extends from behind the reflector to orient the feed assembly for direct illumination of the reflector. The waveguide assembly includes a first waveguide coupled to a first portion of a common waveguide, a second waveguide coupled to a second portion of the common waveguide, and a septum layer that includes a septum polarizer coupled between the common waveguide and the first and second waveguides.
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公开(公告)号：US20210409083A1
公开(公告)日：2021-12-30
申请号：US17366251
申请日：2021-07-02
申请人： ViaSat, Inc.
摘要： Methods, systems, and devices for channelizing and beamforming a wideband waveform are described. Generally, the described techniques provide for transmitting and receiving wideband waveforms that are beamformed on a per-channel basis during generation of the wideband waveforms. A transmitter may separate a first wideband signal into segments, with each segment bandwidth corresponding to a channel of the system bandwidth, and may map the segments to channels. The segments may be replicated to generate multiple copies of each segment. The transmitter may beamform and combine the copies of the segments to generate multiple wideband waveforms, and transmit each wideband waveform using a different antenna. A receiver may receive multiple wideband waveforms using multiple antennas and may separate each wideband waveform into segments, then beamform and de-map the segments. The techniques may be used to transmit and receive beamformed wideband waveforms over tactical data links.
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公开(公告)号：US11212234B2
公开(公告)日：2021-12-28
申请号：US16436073
申请日：2019-06-10
申请人： VIASAT, INC.
IPC分类号： H04L12/875 , H04L12/18 , H04L29/08 , H04L12/927
摘要： Systems and methods are described for optimizing resource utilization in a communications network while also optimizing subscriber engagement with media content over the communications network. Requested content objects can be identified as delayable objects that can be queued for opportunistically delayed communication to both requesting and non-requesting subscribers. Queued delayed content objects are scored with an eye toward optimizing both subscriber engagement and utilization of opportunistically available communications link resources. For example, a storage manager calculates a likelihood that each subscriber will engage with the content if it is opportunistically delivered, and a scheduler calculates a priority order in which to queue each requested delayable content object. Content objects can then be multicast to the subscribers in priority order and with associated information that can be used by the subscribers to determine whether to locally store the content objects as they are opportunistically received.
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公开(公告)号：US20210388881A1
公开(公告)日：2021-12-16
申请号：US17412654
申请日：2021-08-26
申请人： VIASAT, Inc.
IPC分类号： F16F9/30 , H03H9/05 , F16F15/04 , G10K11/168
摘要： Methods, systems, and devices are described for isolating a crystal oscillator assembly from shock and/or vibration inputs. A system may include one or more vibration isolators coupled between the crystal oscillator assembly and the base structure, and each of the vibration isolators may include a spring material layer and a damping material layer. The spring material layer may provide a spring force between the crystal oscillator assembly and the base structure. The damping material layer may be adhered to at least one side of the spring material layer, and may provide a damping force between the crystal oscillator assembly and the base structure. Some vibration isolators may further include a constraint layer adhered to the damping material layer, such that the damping material layer is coupled between the constraint layer and the spring material layer.
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公开(公告)号：US20210384966A1
公开(公告)日：2021-12-09
申请号：US17375704
申请日：2021-07-14
申请人： ViaSat, Inc.
发明人： Kenneth V. Buer , Mark J. Miller
IPC分类号： H04B7/185 , H04B7/06 , H04W84/06 , H01Q19/13 , H01Q21/24 , H01Q25/00 , H04B7/024 , H04B7/0413 , H04W4/00 , H04B7/204 , H01Q3/40 , H04W76/10 , H01Q5/50 , H01Q1/06 , H01Q1/28 , H01Q3/24 , H01Q21/00 , H04W16/28 , H04W40/20 , H04B10/118
摘要： Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams.
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公开(公告)号：US11139919B2
公开(公告)日：2021-10-05
申请号：US15914807
申请日：2018-03-07
申请人： VIASAT, INC.
发明人： William B Sebastian
IPC分类号： H04N21/835 , H04L1/08 , H04L29/08 , H04L29/06 , H04L12/18 , H04N21/6375 , H04N21/6405 , H04N21/6408 , H04N21/6583 , H04N21/24 , H04L12/26
摘要： Methods, apparatuses, and systems for improving utilization of a communications system (e.g., a satellite communications system) are provided, using delayed reliability techniques as part of a multicast transport protocol. Embodiments may operate in a client-server context, in which the server-side of the communication link multicasts data to requesting users and to users where the data is being speculatively prepositioned. Requesting users may implement reliability checks to verify receipt of complete data in response to the request while user systems where data is being speculatively prepositioned may receive multicast reliability information in response to reliability requests from other users, but may not request replacement of missing or corrupted data themselves until a request is made for the data by that system.
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公开(公告)号：US20210305676A1
公开(公告)日：2021-09-30
申请号：US17343922
申请日：2021-06-10
申请人： ViaSat, Inc.
摘要： Methods, systems, and devices are described for an antenna positioning apparatus, which includes a multiple-assembly positioner for adjusting a positioning angle about a positioning axis. The multiple-assembly positioner has two or more positioning assemblies that are coupled in series between a base structure and a positioning structure. Positioning assemblies can be individually selected based on various criteria, such as cost, complexity, angular range, and other performance, and be configured to work together to provide a desired range of adjustment to the positioning angle while simultaneously meeting precision requirements. In one example, a positioning assembly can include a shaft with an eccentric portion, which is rotated in order to provide the adjustment. A method is described where a first positioning assembly can be actuated to a first initial position, and then held, such that a second positioning assembly can be actuated to provide a selected antenna positioning angle.
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公开(公告)号：US11128537B2
公开(公告)日：2021-09-21
申请号：US15635885
申请日：2017-06-28
申请人： ViaSat, Inc.
发明人： Pawan Uberoy , Praveen Madhav
摘要： An apparatus and method for providing a cloud hosted application able to manage virtual network (“VN”) is disclosed. In one embodiment, a process of managing VN using virtual machines (“VMs”) receives a message or request from a user requesting a new VN to be built. The request is sent from a dashboard to a network orchestrator via a communication network. The orchestrator is a VN manager able to facilitate building a VN based on users' input. In one aspect, the orchestrator provides a set of templates that represent VN devices or components to users for facilitating construction of VN. After configuring a VN, a cloud capable of hosting the network is selected. The network or VN is subsequently launched using at least a portion of computing resources allocated in the cloud.
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