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公开(公告)号：US20200067352A1
公开(公告)日：2020-02-27
申请号：US16107962
申请日：2018-08-21
Applicant: Cisco Technology, Inc.
Inventor： Shanay Ravin Kothari
Abstract: The present technology is directed to a system and method for implementing passive power harvesting from ambient electromagnetic emissions with a smart rectenna that incorporates automatic frequency response tuning features. The disclosed system incorporates a tunable High Pass Filter and voltage multiplier rectifier with a front-end ultra wide band antenna unit. The frequency response of tunable components can be actively adjusted to match the frequency band containing most of the energy in the incident electromagnetic emission. A look up table is used for determining the appropriate biasing levels of the tunable components for each frequency in a frequency band of interest. By tuning a frequency response of impedance matching, filtering and rectifying components to correspond to a frequency region of maximum power spectral density in the incident energy signal, the system facilitates the scavenging of ambient electromagnetic energy from the spectral region with the highest power spectral density.
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Patent Agency Ranking
公开(公告)号：US20210384775A1
公开(公告)日：2021-12-09
申请号：US17408291
申请日：2021-08-20
Applicant: Cisco Technology, Inc.
Inventor： Shanay Ravin Kothari
Abstract: The present technology is directed to a system and method for implementing passive power harvesting from ambient electromagnetic emissions with a smart rectenna that incorporates automatic frequency response tuning features. The disclosed system incorporates a tunable High Pass Filter and voltage multiplier rectifier with a front-end ultra wide band antenna unit. The frequency response of tunable components can be actively adjusted to match the frequency band containing most of the energy in the incident electromagnetic emission. A look up table is used for determining the appropriate biasing levels of the tunable components for each frequency in a frequency band of interest. By tuning a frequency response of impedance matching, filtering and rectifying components to correspond to a frequency region of maximum power spectral density in the incident energy signal, the system facilitates the scavenging of ambient electromagnetic energy from the spectral region with the highest power spectral density.
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公开(公告)号：US20190182790A1
公开(公告)日：2019-06-13
申请号：US15834990
申请日：2017-12-07
Applicant: Cisco Technology, Inc.
Inventor： Shanay Ravin Kothari , Ian Matthew Snyder
CPC classification number: H04W64/00 , G06T7/20 , H04B7/0857 , H04L67/10 , H04L67/18 , H04W88/085
Abstract: Systems and methods are disclosed for enhancing target positioning. A broadcast signal from a device is received by at one or more access points, where a first position area of the device is determined from an analysis of the broadcast signal. A second position area of the target, which is within the first position area, is determined by scanning pixels within the first position area in an image captured by the camera and, based on the scanned pixels, at least one target comprising a portion of the pixels is detected. The target within the image is classified, and based on the classification and portion of the pixels comprising the target, the second position area of the target within the first position of the image is triangulated.
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公开(公告)号：US12027882B2
公开(公告)日：2024-07-02
申请号：US17408291
申请日：2021-08-20
Applicant: Cisco Technology, Inc.
Inventor： Shanay Ravin Kothari
CPC classification number: H02J50/27 , H01Q1/248 , H02J50/80 , H03H7/38 , H03H2007/386
Abstract: The present technology is directed to a system and method for implementing passive power harvesting from ambient electromagnetic emissions with a smart rectenna that incorporates automatic frequency response tuning features. The disclosed system incorporates a tunable High Pass Filter and voltage multiplier rectifier with a front-end ultra wide band antenna unit. The frequency response of tunable components can be actively adjusted to match the frequency band containing most of the energy in the incident electromagnetic emission. A look up table is used for determining the appropriate biasing levels of the tunable components for each frequency in a frequency band of interest. By tuning a frequency response of impedance matching, filtering and rectifying components to correspond to a frequency region of maximum power spectral density in the incident energy signal, the system facilitates the scavenging of ambient electromagnetic energy from the spectral region with the highest power spectral density.
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公开(公告)号：US11121582B2
公开(公告)日：2021-09-14
申请号：US16107962
申请日：2018-08-21
Applicant: Cisco Technology, Inc.
Inventor： Shanay Ravin Kothari
Abstract: The present technology is directed to a system and method for implementing passive power harvesting from ambient electromagnetic emissions with a smart rectenna that incorporates automatic frequency response tuning features. The disclosed system incorporates a tunable High Pass Filter and voltage multiplier rectifier with a front-end ultra wide band antenna unit. The frequency response of tunable components can be actively adjusted to match the frequency band containing most of the energy in the incident electromagnetic emission. A look up table is used for determining the appropriate biasing levels of the tunable components for each frequency in a frequency band of interest. By tuning a frequency response of impedance matching, filtering and rectifying components to correspond to a frequency region of maximum power spectral density in the incident energy signal, the system facilitates the scavenging of ambient electromagnetic energy from the spectral region with the highest power spectral density.
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公开(公告)号：US10375667B2
公开(公告)日：2019-08-06
申请号：US15834990
申请日：2017-12-07
Applicant: Cisco Technology, Inc.
Inventor： Shanay Ravin Kothari , Ian Matthew Snyder
Abstract: Systems and methods are disclosed for enhancing target positioning. A broadcast signal from a device is received by at one or more access points, where a first position area of the device is determined from an analysis of the broadcast signal. A second position area of the target, which is within the first position area, is determined by scanning pixels within the first position area in an image captured by the camera and, based on the scanned pixels, at least one target comprising a portion of the pixels is detected. The target within the image is classified, and based on the classification and portion of the pixels comprising the target, the second position area of the target within the first position of the image is triangulated.
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