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公开(公告)号：US10923825B2
公开(公告)日：2021-02-16
申请号：US15647855
申请日：2017-07-12
申请人： SRC, Inc.
摘要： A spiral antenna, comprising a first arm and a second arm. The first arm and second arm are interlaced with each other. Each arm has a plurality of turns comprising an inner subset of circular turns, and an outer subset of turns, electrically coupled to the inner subset, having a shape with only four lines of symmetry. An array of such spiral antennas disposed a substrate that extends in a direction of a longitudinal axis and having a round cross section in a plan transverse to the longitudinal axis.
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公开(公告)号：US10690749B2
公开(公告)日：2020-06-23
申请号：US15624109
申请日：2017-06-15
申请人： SRC, Inc.
发明人： David L. Weldum
摘要： A method of processing a radar hit from an object using, for each of a plurality of cells, a signal strength threshold, a hit rate threshold, a time of last detection; and receiving, for one of the plurality of cells corresponding to the object, a measured signal strength, a measured hit rate and a time of measurement. The object is identified as clutter if the measured hit rate is greater than the hit rate threshold, and the measured signal strength is less than signal strength threshold. The signal strength threshold is above a conventional CFAR signal threshold. Measured Doppler strength may also be used to identify clutter. Identification can be determined using Doppler-polarity-specific data values. The hit rate and the mean Doppler speed of the one of the plurality of cells can be updated using a running average.
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公开(公告)号：US10663563B2
公开(公告)日：2020-05-26
申请号：US15715568
申请日：2017-09-26
申请人： SRC, Inc.
发明人： Harvey K. Schuman
摘要： The present invention is directed to an antenna system and a method that is configured to compute calibration element voltage gain patterns as functions of a digital antenna model and a plurality of complex beamformer voltages, determine calibration through path transfer functions from the plurality of complex voltages, and remove the calibration element voltage gain patterns from the calibration through path transfer functions to determine a beamforming network transfer function. The beamforming network transfer function and the far-field element voltage gain patterns are combined to obtain a system transfer function used to revise a calibration table.
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公开(公告)号：US10422869B2
公开(公告)日：2019-09-24
申请号：US15489304
申请日：2017-04-17
申请人： SRC, Inc.
摘要： The present invention relates to a method and system for identifying and eliminating second time-around ambiguous targets and, more particularly, to a method and system for identifying and eliminating second time-around ambiguous targets using waveform phase modulation.
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公开(公告)号：US20190020104A1
公开(公告)日：2019-01-17
申请号：US15647855
申请日：2017-07-12
申请人： SRC, Inc.
摘要： A spiral antenna, comprising a first arm and a second arm. The first arm and second arm are interlaced with each other. Each arm has a plurality of turns comprising an inner subset of circular turns, and an outer subset of turns, electrically coupled to the inner subset, having a shape with only four lines of symmetry. An array of such spiral antennas disposed a substrate that extends in a direction of a longitudinal axis and having a round cross section in a plan transverse to the longitudinal axis.
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公开(公告)号：US20180364327A1
公开(公告)日：2018-12-20
申请号：US15624109
申请日：2017-06-15
申请人： SRC, Inc.
发明人： David L. Weldum
IPC分类号： G01S7/292
CPC分类号： G01S7/2922 , G01S7/412 , G01S7/414 , G01S13/91
摘要： A method of processing a radar hit from an object using, for each of a plurality of cells, a signal strength threshold, a hit rate threshold, a time of last detection; and receiving, for one of the plurality of cells corresponding to the object, a measured signal strength, a measured hit rate and a time of measurement. The object is identified as clutter if the measured hit rate is greater than the hit rate threshold, and the measured signal strength is less than signal strength threshold. The signal strength threshold is above a conventional CFAR signal threshold. Measured Doppler strength may also be used to identify clutter. Identification can be determined using Doppler-polarity-specific data values. The hit rate and the mean Doppler speed of the one of the plurality of cells can be updated using a running average.
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公开(公告)号：US10031171B2
公开(公告)日：2018-07-24
申请号：US15015730
申请日：2016-02-04
申请人： SRC, Inc.
发明人： Michael Robinson
摘要： The present invention is directed to a system and method for providing an estimated design specification as a function of a number of spatially separated far-field measurements and a predetermined design specification. The predetermined design specification corresponds to an antenna being in a properly configured and a properly excited state. The system maps the spatially separated far-field measurements into an estimated far-field antenna pattern of the antenna based on the estimated design specification. The system provides difference data based on a comparison of the predetermined design specification and the estimated design specification and can adjust the electrical excitation signals of the antenna in accordance with the difference data or the estimated far-field antenna pattern.
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公开(公告)号：US20180164406A1
公开(公告)日：2018-06-14
申请号：US15055022
申请日：2016-02-26
申请人： SRC, Inc.
发明人： Daniel R. Culkin
CPC分类号： G01S7/295 , G01S7/04 , G01S7/2923 , G01S7/2926 , G01S13/20 , G01S13/522 , G01S13/582 , G01S13/726 , G06F3/147
摘要： A radar system and method is provided for increasing the search volume, detection range, and/or update rate of a search radar without requiring an increase of the radar transmit power or antenna aperture size. This is accomplished by using a target response calculation that uses signal energy that is thrown away by conventional systems. A probability of target presence and target behavior (Ppb) is calculated based on the retained signal energy to thus improve the radar's ability to detect the presence of a target. The invention processes multiple CPIs either coherently or incoherently via the Ppb methodology to further improve the radar's detection abilities.
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公开(公告)号：US09982292B2
公开(公告)日：2018-05-29
申请号：US13629846
申请日：2012-09-28
申请人： SRC, Inc.
发明人： Adam J. Lowe
IPC分类号： G01N33/543 , C12Q1/68
CPC分类号： C12Q1/6825 , C12Q1/6804 , C12Q1/6823 , G01N33/54346 , C12Q2525/205 , C12Q2563/155
摘要： Methods and systems for detecting chemical and biological agents using oligonucleotide aptamers. A sensor includes a detection aptamer that has a binding domain for the chemical or biological agent, and is bound to fibers of a textile such as a patch or article of clothing. The detection aptamer can be stabilized and enhanced through a stabilization agent such as trehalose or through binding to a nanoparticle which is then bound to the fiber. Binding of the chemical and biological agent of interest to the detection aptamer can be reported to the user or wearer of the textile in a variety of ways, including visually and electrically.
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公开(公告)号：US20180106775A1
公开(公告)日：2018-04-19
申请号：US15293665
申请日：2016-10-14
申请人： SRC, Inc.
发明人： Mark Angeli , John Durst , Garrett Liddil , Marcello M. DiStasio
CPC分类号： G01N33/0067 , G01N2033/0068 , G01V11/002
摘要： Method and system for detecting and/or quantifying recent human presence in an environment using a calculated rate of decay of carbon dioxide concentration levels within that environment. A sensor measures the change in carbon dioxide levels over time to calculate the rate of decay to equilibrium and extrapolate recent human presence. Also provided is a method and system for quantifying recent human activity in an environment using the calculated rate of decay to equilibrium.
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