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公开(公告)号：US20190052348A1
公开(公告)日：2019-02-14
申请号：US16044911
申请日：2018-07-25
申请人： ViaSat, Inc.
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：US20150381265A1
公开(公告)日：2015-12-31
申请号：US14754904
申请日：2015-06-30
申请人： ViaSat, Inc.
发明人： Donald L. Runyon , Sharad V. Parekh
CPC分类号： H04B7/18513 , H01P1/173 , H01Q1/1264 , H01Q1/288 , H01Q1/421 , H01Q13/0258 , H01Q21/245
摘要： The described technology uses a dual circularly polarized panel antenna and equal amplitude variable phase control between the two circularly polarized components to achieve a rotatable linear polarization tracking system. An example antenna system includes a plurality of antenna elements that include a plurality of polarization transducers to generate a first signal component and a second signal component from a received wave. A polarization control network applies a phase difference based on an orientation of the linear polarization of the wave with respect to the antenna system between the signal components to generate adjusted signal components. The polarization control network combines the adjusted signal components to form a composite signal that corresponds to the linear polarization of the wave. Linearly polarized transmit and receive signals may be co-polarized or cross-polarized.
摘要翻译： 所描述的技术使用双圆偏振面板天线和两个圆偏振分量之间的等幅度可变相位控制，以实现可旋转的线性偏振跟踪系统。 示例性天线系统包括多个天线元件，其包括多个极化换能器以从接收波产生第一信号分量和第二信号分量。 偏振控制网络基于相对于信号分量之间的天线系统的波的线性偏振的取向来施加相位差，以产生经调整的信号分量。 偏振控制网络将经调整的信号分量组合以形成对应于波的线偏振的复合信号。 线偏振的发射和接收信号可以是共极化的或交叉极化的。
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公开(公告)号：US11996618B2
公开(公告)日：2024-05-28
申请号：US17708594
申请日：2022-03-30
申请人： Viasat Inc.
发明人： Donald L. Runyon , Anders Jensen
CPC分类号： H01Q19/132 , G06F30/00 , H01Q13/02 , H01Q13/0241 , H01Q15/242 , H01Q21/064 , H01Q21/30
摘要： Disclosed is a shaped horn in conjunction with a dielectric tube for enhanced aperture directivity that can achieve a near optimum efficiency. The shaped horn provides additional mode control to provide an improved off-axis cross-polarization response. The horn shape can be individually optimized for isolated horns or for horns in a feed array. The feed array environment can produce results that lead to a different optimized shape than the isolated horn. Lower off axis cross-polarization can result in improved efficiency and susceptibility to interference.
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公开(公告)号：US20220200697A1
公开(公告)日：2022-06-23
申请号：US17555225
申请日：2021-12-17
申请人： Viasat, Inc.
摘要： Systems and methods for supporting more flexible coverage areas and spatial capacity assignments using satellite communications systems are disclosed. A hub-spoke, bent-pipe satellite communications system includes: terminals; gateways; a controller for specifying data for controlling satellite operations in accordance with a frame definition including timeslots for a frame and defining an allocation of capacity between forward and return traffic. The satellite communications system may employ a satellite with a feed array assembly and may use on-board beamforming or ground-based beamforming. Beam hopping within timeslots of the frame may be used to provide coverage to different cells in different time periods. The flexible coverage areas may be provided using changes in satellite position, antenna patterns, or beam resource allocations.
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公开(公告)号：US20220115776A1
公开(公告)日：2022-04-14
申请号：US17512369
申请日：2021-10-27
申请人： Viasat, Inc.
IPC分类号： H01Q1/28 , H04B7/06 , H01Q21/28 , H04B7/185 , H01Q1/42 , H01Q3/08 , H01Q3/24 , H01Q21/06 , H01Q3/02 , H04B7/195 , H04B7/08
摘要： In one example, an antenna system is described. The antenna system includes a primary antenna on an aircraft. The primary antenna is mechanically steerable and has an asymmetric antenna beam pattern with a narrow beamwidth axis and a wide beamwidth axis at boresight. The antenna system also includes a secondary antenna on the aircraft, the secondary antenna including an array of antenna elements. The antenna system also includes an antenna selection system to control communication of a signal between the aircraft and a target satellite via the primary antenna and the secondary antenna. The antenna selection system switches communication of the signal from the primary antenna to the secondary antenna when a performance characteristic for communication with the target satellite satisfies a threshold due to a position of the aircraft relative to the target satellite.
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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：US11088441B2
公开(公告)日：2021-08-10
申请号：US16846780
申请日：2020-04-13
申请人： Viasat Inc.
发明人： Lance B. Diamond , Donald L. Runyon
IPC分类号： H01Q1/28 , H01Q3/24 , H01Q3/08 , H01Q21/06 , H04B7/06 , H01Q1/42 , H01Q3/02 , H01Q21/28 , H04B7/08 , H04B7/185 , H04B7/195
摘要： In one embodiment, an antenna system is described. The antenna system includes a primary antenna on an aircraft. The primary antenna is mechanically steerable and has an asymmetric antenna beam pattern with a narrow beamwidth axis and a wide beamwidth axis at boresight. The antenna system also includes a secondary antenna on the aircraft, the secondary antenna including an array of antenna elements. The antenna system also includes an antenna selection system to control communication of a signal between the aircraft and a target satellite via the primary antenna and the secondary antenna. The antenna selection system switches communication of the signal from the primary antenna to the secondary antenna when an amount of interference with an adjacent satellite reaches a threshold due to the wide beamwidth axis of the asymmetric antenna beam pattern.
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公开(公告)号：US10998964B2
公开(公告)日：2021-05-04
申请号：US16568837
申请日：2019-09-12
申请人： ViaSat, Inc.
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 , H01Q1/24 , H04W16/26
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：US20200343647A1
公开(公告)日：2020-10-29
申请号：US16924930
申请日：2020-07-09
申请人： VIASAT, INC.
发明人： Donald L. Runyon , Anders Jensen
摘要： Disclosed is a shaped horn in conjunction with a dielectric tube for enhanced aperture directivity that can achieve a near optimum efficiency. The shaped horn provides additional mode control to provide an improved off-axis cross-polarization response. The horn shape can be individually optimized for isolated horns or for horns in a feed array. The feed array environment can produce results that lead to a different optimized shape than the isolated horn. Lower off axis cross-polarization can result in improved efficiency and susceptibility to interference.
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公开(公告)号：US20200243954A1
公开(公告)日：2020-07-30
申请号：US16846780
申请日：2020-04-13
申请人： Viasat Inc.
发明人： Lance B. Diamond , Donald L. Runyon
IPC分类号： H01Q1/28 , H04B7/185 , H04B7/195 , H04B7/08 , H01Q21/28 , H01Q3/02 , H01Q1/42 , H04B7/06 , H01Q21/06 , H01Q3/08 , H01Q3/24
摘要： In one embodiment, an antenna system is described. The antenna system includes a primary antenna on an aircraft. The primary antenna is mechanically steerable and has an asymmetric antenna beam pattern with a narrow beamwidth axis and a wide beamwidth axis at boresight. The antenna system also includes a secondary antenna on the aircraft, the secondary antenna including an array of antenna elements. The antenna system also includes an antenna selection system to control communication of a signal between the aircraft and a target satellite via the primary antenna and the secondary antenna. The antenna selection system switches communication of the signal from the primary antenna to the secondary antenna when an amount of interference with an adjacent satellite reaches a threshold due to the wide beamwidth axis of the asymmetric antenna beam pattern.
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