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公开(公告)号：US20240330614A1
公开(公告)日：2024-10-03
申请号：US18574811
申请日：2022-06-30
Applicant: Joe MUELLER , Adam BLAIR , Jeff GOOS , Automaton, Inc.
Inventor： Joe Mueller , Adam Blair , Jeff Goos
CPC classification number: G06K7/10019 , H04B1/0003
Abstract: A radio-frequency identification (RFID) tag reader interrogates a passive RFID tag by transmitting a signal to the tag, then detecting a much weaker reply at the same carrier frequency from the tag. Unfortunately, self-interference caused by signal leakage within the reader or crosstalk among the reader's antenna elements can make the reply more difficult to detect and limit the range at which the reader can sense tags. A self-interference cancellation circuit in the reader reduces or suppresses the effects of signal leakage and crosstalk, enabling detection of weaker tag replies. The self-interference cancellation circuit can calibrate itself before each transmission to ensure good performance. This improves the reader's sensitivity, increases the reader's range, reduces the reader's power consumption, and/or reduces the minimum required dynamic range of the analog-to-digital converters (ADCs) that digitize the received tag replies.
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公开(公告)号：US20220082651A1
公开(公告)日：2022-03-17
申请号：US17532521
申请日：2021-11-22
Applicant: Automaton, Inc.
Inventor： Spencer Hewett , Adam Blair , Ken Seiff , Michael Murphy , Mark Wieman , Tamara Adlin
Abstract: A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.
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公开(公告)号：US12164048B2
公开(公告)日：2024-12-10
申请号：US17532521
申请日：2021-11-22
Applicant: Automaton, Inc.
Inventor： Spencer Hewett , Adam Blair , Ken Seiff , Michael Murphy , Mark Wieman , Tamara Adlin
Abstract: A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.
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公开(公告)号：US20240193381A1
公开(公告)日：2024-06-13
申请号：US18556541
申请日：2022-04-25
Applicant: Automaton, Inc.
Inventor： Thomas A. Brown, III , Joe Mueller , Adam Blair , Spencer Hewett , Prokopios Panagiotou
CPC classification number: G06K7/10237 , G01S13/08 , G01S13/84
Abstract: Radio-frequency identification (RFID) systems use readers to query and locate passive RFID tags in stores, warehouses, and other environments. A signal from the reader powers up the tag, which modulates and backscatters the signal toward the reader. Unfortunately, the maximum permitted RF signal power, self-interference at the reader, tag sensitivity, and channel loss limit the range at which readers can detect and locate tags. Using multiple readers simultaneously circumvents these limits. When used together, each reader transmits a signal to a tag in turn, and all of the readers listen for each of the tag's responses. The readers that are not transmitting do not experience self-interference and so can detect responses at lower power levels (longer ranges). Because the readers are at different locations, they measure different angles of arrival (AOAs) for each response. These simultaneous measurements can be used to locate each tag faster and with higher fidelity.
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公开(公告)号：US11408965B2
公开(公告)日：2022-08-09
申请号：US16717249
申请日：2019-12-17
Applicant: Automaton, Inc.
Inventor： Spencer Hewett , Adam Blair , Ken Seiff , Michael Murphy , Mark Wieman , Tamara Adlin
Abstract: A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.
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Patent Agency Ranking
公开(公告)号：US20240295623A1
公开(公告)日：2024-09-05
申请号：US18659781
申请日：2024-05-09
Applicant: Automaton, Inc.
Inventor： Spencer Hewett , Adam Blair , Ken Seiff , Michael Murphy , Mark Wieman , Tamara Adlin
CPC classification number: G01S5/02 , G01S5/0218 , G01S5/0273 , G01S5/0294 , G01S5/04 , G06K7/10297 , G06K7/10465
Abstract: A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.
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公开(公告)号：US12013474B2
公开(公告)日：2024-06-18
申请号：US17199308
申请日：2021-03-11
Applicant: Automaton, Inc.
Inventor： Spencer Hewett , Adam Blair , Ken Seiff , Michael Murphy , Mark Wieman , Tamara Adlin
CPC classification number: G01S5/02 , G01S5/0218 , G01S5/0273 , G01S5/0294 , G01S5/04 , G06K7/10297 , G06K7/10465
Abstract: A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.
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公开(公告)号：US20210199748A1
公开(公告)日：2021-07-01
申请号：US17199836
申请日：2021-03-12
Applicant: Automaton, Inc. DBA RADAR
Inventor： Spencer Hewett , Adam Blair , Ken Seiff , Michael Murphy , Mark Wieman , Tamara Adlin
Abstract: A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.
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公开(公告)号：US12117548B2
公开(公告)日：2024-10-15
申请号：US17199836
申请日：2021-03-12
Applicant: Automaton, Inc.
Inventor： Spencer Hewett , Adam Blair , Ken Seiff , Michael Murphy , Mark Wieman , Tamara Adlin
CPC classification number: G01S5/0218 , G01S5/02 , G01S5/0273 , G01S5/0294 , G01S5/04 , G06K7/10297 , G06K7/10465
Abstract: A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.
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公开(公告)号：US11215691B2
公开(公告)日：2022-01-04
申请号：US16579949
申请日：2019-09-24
Applicant: Automaton, Inc.
Inventor： Spencer Hewett , Adam Blair , Ken Seiff , Michael Murphy , Mark Wieman , Tamara Adlin
Abstract: A radio frequency identification (RFID) system includes an array of antennas to distinguish line-of-sight (LOS) paths from non-line-of-sight (NLOS) paths. The distance between adjacent antennas in the array of antennas is less than half the wavelength of the radio frequency (RF) signal of the system. Each antenna in the antenna array is also digitally controlled to change relative phase difference among the antennas, thereby allowing digital steering of the array of antennas across angles of arrival (AOAs) between 0 and π. The digital steering generates a plot of signal amplitudes as a function of AOAs. LOS paths are distinguished from NLOS paths based on the shapes (e.g., depth, gradient, etc.) of local extremes (e.g., maxima or minima) in the plot.
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