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公开(公告)号：US11043736B2
公开(公告)日：2021-06-22
申请号：US17024763
申请日：2020-09-18
摘要： An antenna beam tracking system has dynamic interference reduction. The system includes antennas that can form multiple beams, each beam of which can continually track or point its beams independently in various angular directions. A first beam continually tracks and receives (downlink) signals from a desired source or node such as a satellite or terrestrial node which generally has an apparent motion relative to the antenna. A second beam continually tracks and receives potentially harmful interference signals that may arise from different directions. The signals of the second beam are dynamically coupled to the signals in the first beam in such a manner as to effect cancellation or substantial reduction of the interference.
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公开(公告)号：US11550062B2
公开(公告)日：2023-01-10
申请号：US17125681
申请日：2020-12-17
摘要： A multibeam Radio Frequency (RF) lens antenna is designed as a receiver for Global Navigation Satellite System (GNSS) applications, such as GPS (Global Positioning System), Galileo, GLONASS, COMPASS, and others. The RF lens and plurality of associated feed elements and receiver circuits combine to form a plurality of resulting high-gain relatively narrow beams that, taken together, allow reception of signals from GNSS satellites over the entire upper hemisphere. Any kind of RF lens can be used, where the lens can be of homogeneous or inhomogeneous, dielectric or metamaterial metasurface construction. The benefit of this approach to build a GNSS receiver over existing alternatives is increased gain and decreased noise at each receiver, which improves the signal to noise ratio (SNR) and improves the accuracy and reliability of the position and time measurements, while also reducing the impact of, and sensitivity to, interference, jamming, and spoofing signals. The approaches described in this patent can be combined with existing signal processing and accuracy improvement methods (such as Real-Time Kinematic (RTK), Precise-Point Positioning (PPP), and Differential GPS (DEPS)) for further benefits. This system has applications within the surveying, maritime, land mobility, aerospace, and government positioning market areas.
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公开(公告)号：US20220140493A1
公开(公告)日：2022-05-05
申请号：US17517823
申请日：2021-11-03
发明人： Jeremiah P. Turpin , Zakaria Bouhanna , John Finney , Ergin Dinc
摘要： Inhomogeneous dielectric lenses for electromagnetic waves can be produced by a process such as 3D printing to have controllable dielectric values. Dielectric values can be produced by a varying density of air voids within, for example, a dielectric matrix to obtain an effective overall density. Approaches in accordance with various embodiments can obtain uniform, isotropic dielectric properties without resonant behavior by the use of aperiodic distributions of nonuniformly-sized air voids. Target air fraction and distribution of air voids can be specified by a target dielectric constant through dielectric mixing rules, such as Maxwell-Garnet mixing rules, and a requirement for locally uniform distributions of air voids, while varying the density of the air voids across the overall structure to produce a desired gradient of dielectric properties.
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公开(公告)号：US20180269576A1
公开(公告)日：2018-09-20
申请号：US15722561
申请日：2017-10-02
CPC分类号： H01Q3/46 , H01Q1/241 , H01Q1/288 , H01Q3/14 , H01Q3/245 , H01Q3/30 , H01Q19/062 , H01Q21/0025 , H01Q21/061 , H01Q21/22 , H01Q25/007
摘要： An antenna system that includes a plurality of lens sets. Each lens set includes a lens and at least one feed element. At least one feed element is aligned with the lens and configured to direct a signal through the lens at a desired direction.
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公开(公告)号：US20190288378A1
公开(公告)日：2019-09-19
申请号：US16298491
申请日：2019-03-11
摘要： An antenna beam tracking system has dynamic interference reduction. The system includes antennas that can form multiple beams, each beam of which can continually track or point its beams independently in various angular directions. A first beam continually tracks and receives (downlink) signals from a desired source or node such as a satellite or terrestrial node which generally has an apparent motion relative to the antenna. A second beam continually tracks and receives potentially harmful interference signals that may arise from different directions. The signals of the second beam are dynamically coupled to the signals in the first beam in such a manner as to effect cancellation or substantial reduction of the interference.
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公开(公告)号：US10116051B2
公开(公告)日：2018-10-30
申请号：US15722561
申请日：2017-10-02
摘要： An antenna system that includes a plurality of lens sets. Each lens set includes a lens and at least one feed element. At least one feed element is aligned with the lens and configured to direct a signal through the lens at a desired direction.
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公开(公告)号：US11581639B2
公开(公告)日：2023-02-14
申请号：US17221143
申请日：2021-04-02
发明人： Jeremiah P. Turpin , Brian Billman , John Finney
摘要： A field-assembled satellite communications terminal has a plurality of discrete, modular aperture blocks. Each aperture block contains an electrically steered antenna aperture, and a plurality of interconnection ports for power and data communications between the plurality of aperture blocks. The plurality of interconnection ports are removably connectable by the end user in the field. The terminal further has a signal processing system for receiving, processing, and generating signals to and from the apertures. The aperture blocks are connected to each other in the field and self-configure to form an electrically-steered antenna.
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公开(公告)号：US11605905B2
公开(公告)日：2023-03-14
申请号：US16576408
申请日：2019-09-19
摘要： A multi-band antenna system that includes a first antenna array and a second antenna array. The first antenna array includes a plurality of lens sets, each including a lens and feed element(s) configured to transmit and/or receive electromagnetic signals that pass through the lens. The second antenna array includes a plurality of antenna elements, each disposed between two of the lenses of the first array.
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公开(公告)号：US11469515B2
公开(公告)日：2022-10-11
申请号：US17182992
申请日：2021-02-23
发明人： Jeremiah P. Turpin , John Finney
摘要： A microwave prism is used to repoint an operational Direct-to-Home (DTH) or Very Small Aperture Terminal (VSAT) reflector antenna as part of a ground terminal to receive (or transmit) signals from a different satellite or orbital position without physically moving the reflector or the feed horn antenna. The microwave prism operates by shifting the radiated fields from the horn antenna generally perpendicular to the focal axis of the parabolic reflector in order to cause the main beam of the reflector to scan in response. For an existing reflector antenna receiving signals from an incumbent satellite, a prism has been designed to be snapped into place over the feed horn and shift the fields laterally by a calibrated distance. The structure of the prism is designed to be positioned and oriented correctly without the use of skilled labor. This system allows a satellite service provider to repoint their subscribers to a new satellite by shipping a self-install kit of the prism that is pre-configured to have the correct orientation and position on the feed antenna to correctly re-point the beam at a different satellite once the prism is applied. One benefit of the system is that unskilled labor, i.e., the subscribers themselves, can be used to repoint a large number of subscriber antennas in a satellite network rather than requiring the cost of a truck roll and a technician to visit every site. The microwave prisms to implement this functionality can be constructed in different ways, with homogeneous slabs or blocks, Gradient-Index (GRIN), multi-layered dielectric, geometric or graded-index Fresnel-zone, metasurface, or metamaterial prisms. The geometric and electrical constraints of the design are determined by the incumbent and target satellites and the ground terminal location.
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10.发明申请公开(公告)号：US20210135355A1
公开(公告)日：2021-05-06
申请号：US17084396
申请日：2020-10-29
IPC分类号： H01Q3/26 , H04B7/0426 , H04B1/16 , H01Q3/36
摘要： A circuit has at least one amplifier and a signal routing device such as one or more switches, and an array of antenna elements from which some subset must be enabled and processed at a time. The antenna elements can be grouped in accordance with an organization scheme (e.g., rows, columns) to enable more flexibility in selecting and routing the signals. The system is used to create one or more beams, which can be pointed (steered) to a wide range of directions by means of selecting one or more feed antennas in a switched-feed antenna without including full receive and transmit circuitry (DSP, frequency conversion) for each feed in the array. In this case, minimizing the number of DSP chains is desirable to reduce the cost, power, and complexity of the antenna. The resulting beam(s) can be combined and manipulated to support multiple users, track several targets, increase operational range, increase radar resolution, or data-rate in communications.
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