Patents by Inventor Sireesha Ramisetti
Sireesha Ramisetti has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11555792Abstract: Embodiments are disclosed for terahertz spectroscopy and imaging in dynamic environments. In an embodiment, a method comprises using a sensor of an electronic device to determine an orientation of the electronic device. A transmitter of the electronic device emits an electromagnetic (EM) wave in a terahertz (THz) frequency band into a dynamic environment according to a power duty cycle that is determined at least in part by the orientation. A receiver of the electronic device receives a reflected EM wave from the environment. A spectral response of the reflected EM wave is determined that includes absorption spectra that is indicative of the transmission medium in the environment. The absorption spectra are compared with known absorption spectra of target transmission mediums. Based on the comparing, a particular target transmission medium is identified as being the transmission medium in the environment, and a concentration level of the identified target transmission medium in the environment is determined.Type: GrantFiled: August 8, 2019Date of Patent: January 17, 2023Assignee: Apple Inc.Inventors: Vijendrakumar K. Ashiwal, Sireesha Ramisetti, Chia-Chi Chen, Vusthla Sunil Reddy, Peter M. Agboh
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Patent number: 11513004Abstract: Embodiments are disclosed for terahertz spectroscopy and imaging in dynamic environments. In an embodiment, a transmitter of an electronic device emits a continuous electromagnetic (EM) wave in the terahertz (THz) frequency band into a dynamic environment that includes a transmission medium that changes over time. A receiver of the electronic device, receives an EM wave reflected off an object in the environment and determines a spectral response of the reflected EM wave. The spectral response includes absorption spectra at a frequency in the THz frequency band that is indicative of a known target transmission medium. The absorption spectra of the target transmission medium and a path length of the reflected EM wave signal are used to obtain the concentration level of the target transmission medium from a reference library of known concentration levels.Type: GrantFiled: August 8, 2019Date of Patent: November 29, 2022Assignee: Apple Inc.Inventors: Chia-Chi Chen, Vusthla Sunil Reddy, Sireesha Ramisetti, Peter M. Agboh, Mohit Narang, Vijendrakumar K. Ashiwal
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Patent number: 11099072Abstract: Embodiments are disclosed for terahertz spectroscopy and imaging in dynamic environments. In an embodiment, a method comprises emitting a continuous electromagnetic (EM) wave in a terahertz (THz) frequency band into a dynamic environment. The EM THz wave is reflected off an object in the environment. A spectral response of a received signal indicative of the reflected EM wave is determined that includes absorption spectra at a frequency in the THz frequency band. The absorption spectra is indicative of a transmission medium in the environment. The spectral response of the received signal is compensated for fixed and frequency-specific losses. The compensated absorption spectra is compared with known absorption spectra of target transmission mediums. Based on results of the comparing, a particular target transmission medium is identified as being the transmission medium in the environment. The absorption spectra loss is used to determine a concentration level of the target transmission medium.Type: GrantFiled: August 8, 2019Date of Patent: August 24, 2021Assignee: Apple Inc.Inventors: Sireesha Ramisetti, Chia-Chi Chen, Vijendrakumar K. Ashiwal, Peter M. Agboh, Vusthla Sunil Reddy
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Publication number: 20210041295Abstract: Embodiments of a terahertz (THz) sensor module are disclosed for spectroscopy and imaging in a dynamic environment. In an embodiment, a terahertz (THz) sensor module comprises: a THz emitter configured to emit a THz beam into an environment; one or more movable micro-electromechanical system (MEMS) micromirrors; and one or more MEMS motors or actuators coupled to the one or more MEMS micromirrors. The one or more MEMS motors or actuators are configured to move the one or more MEMS micromirrors to change a direction of the THz beam in the environment. A THz receiver is configured to receive a reflection of the THz beam from a reflective object in the environment.Type: ApplicationFiled: August 8, 2019Publication date: February 11, 2021Inventors: Sireesha Ramisetti, Chia-Chi Chen, Vusthla Sunil Reddy, Peter M. Agboh, Vijendrakumar K. Ashiwal
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Publication number: 20210041293Abstract: Embodiments are disclosed for terahertz spectroscopy and imaging in dynamic environments. In an embodiment, a method comprises emitting a continuous electromagnetic (EM) wave in a terahertz (THz) frequency band into a dynamic environment. The EM THz wave is reflected off an object in the environment. A spectral response of a received signal indicative of the reflected EM wave is determined that includes absorption spectra at a frequency in the THz frequency band. The absorption spectra is indicative of a transmission medium in the environment. The spectral response of the received signal is compensated for fixed and frequency-specific losses. The compensated absorption spectra is compared with known absorption spectra of target transmission mediums. Based on results of the comparing, a particular target transmission medium is identified as being the transmission medium in the environment. The absorption spectra loss is used to determine a concentration level of the target transmission medium.Type: ApplicationFiled: August 8, 2019Publication date: February 11, 2021Inventors: Sireesha Ramisetti, Chia-Chi Chen, Vijendrakumar K. Ashiwal, Peter M. Agboh, Vusthla Sunil Reddy
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Publication number: 20210041292Abstract: Embodiments are disclosed for terahertz spectroscopy and imaging in dynamic environments. In an embodiment, a transmitter of an electronic device emits a continuous electromagnetic (EM) wave in the terahertz (THz) frequency band into a dynamic environment that includes a transmission medium that changes over time. A receiver of the electronic device, receives an EM wave reflected off an object in the environment and determines a spectral response of the reflected EM wave. The spectral response includes absorption spectra at a frequency in the THz frequency band that is indicative of a known target transmission medium. The absorption spectra of the target transmission medium and a path length of the reflected EM wave signal are used to obtain the concentration level of the target transmission medium from a reference library of known concentration levels.Type: ApplicationFiled: August 8, 2019Publication date: February 11, 2021Inventors: Chia-Chi Chen, Vusthla Sunil Reddy, Sireesha Ramisetti, Peter M. Agboh, Mohit Narang, Vijendrakumar K. Ashiwal
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Publication number: 20210041376Abstract: Embodiments are disclosed for terahertz spectroscopy and imaging in dynamic environments. In an embodiment, a method comprises using a sensor of an electronic device to determine an orientation of the electronic device. A transmitter of the electronic device emits an electromagnetic (EM) wave in a terahertz (THz) frequency band into a dynamic environment according to a power duty cycle that is determined at least in part by the orientation. A receiver of the electronic device receives a reflected EM wave from the environment. A spectral response of the reflected EM wave is determined that includes absorption spectra that is indicative of the transmission medium in the environment. The absorption spectra are compared with known absorption spectra of target transmission mediums. Based on the comparing, a particular target transmission medium is identified as being the transmission medium in the environment, and a concentration level of the identified target transmission medium in the environment is determined.Type: ApplicationFiled: August 8, 2019Publication date: February 11, 2021Inventors: Vijendrakumar K. Ashiwal, Sireesha Ramisetti, Chia-Chi Chen, Vusthla Sunil Reddy, Peter M. Agboh
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Patent number: 9317798Abstract: An RFID device according to one embodiment includes an active portion of a first inverted F antenna; a feed electrically coupled to the active portion; an active portion of a second inverted F antenna, a feed electrically coupled to the second active portion; a ground plane spaced from the active portions; and an RFID controller coupled to the feeds. An RFID device according to another embodiment includes an inverted F antenna having an active portion, a ground plane spaced from the active portion, and a feed coupled to the active portion, wherein the active portion includes multiple aims, a first of the arms having a first length and a second of the arms having a second length; and an RFID controller coupled to the feed.Type: GrantFiled: June 25, 2012Date of Patent: April 19, 2016Assignee: Intelleflex CorporationInventors: Edmond Sardariani, Thomas Birnbaum, Debalina Ghosh, Sireesha Ramisetti
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Patent number: 8736452Abstract: A chipless RFID tag system having a transmitter sending an input signal and a tag substrate. An ID generation circuit on the tag relies on microstrip transmission line patterns which are pre-designed to generate a unique code. The ID generating circuit may be designed based upon the transmission line properties, including signal delay, and/or reflection, and/or phase change. The tag may be formed on a flexible substrate having at least one microstrip and the microstrip having a first portion with a first impedance and a second portion with a second impedance different from the first impedance. The tag may further include a microstrip antenna for communication with the transmitter and a receiver system. The tag may also include sensors for detection of desired substances of interest. The system may further include a receiver detecting at least two reflections from an interface of first and second impedances and identifying relative time domain positions of the reflections to one another.Type: GrantFiled: March 13, 2008Date of Patent: May 27, 2014Assignee: Louisiana Tech University Research Foundation; a division of Louisiana Tech University Foundation, Inc.Inventors: Khodadad Varahramyan, Mangilal Agarwal, Sudhir Shrestha, Jeevan Kumar Vemagiri, Aravind Chamarti, Sireesha Ramisetti, Mercyma Dee Balachandran
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Publication number: 20120268327Abstract: An RFID device according to one embodiment includes an active portion of a first inverted F antenna; a feed electrically coupled to the active portion; an active portion of a second inverted F antenna, a feed electrically coupled to the second active portion; a ground plane spaced from the active, portions; and an RFID controller coupled to the feeds. An RFID device according to another embodiment includes an inverted F antenna having an active portion, a ground plane spaced from the active portion, and a feed coupled to the active portion, wherein the active portion includes multiple aims, a first of the arms having a first length and a second of the arms having a second length; and an RFID controller coupled to the feed.Type: ApplicationFiled: June 25, 2012Publication date: October 25, 2012Applicant: INTELLEFLEX CORPORATIONInventors: Edmond Sardariani, Thomas Birnbaum, Debalina Ghosh, Sireesha Ramisetti
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Patent number: 8228236Abstract: An RFID device according to one embodiment includes an inverted F antenna having an active portion, a ground plane spaced from the active portion, and a feed coupled to and coplanar with the active portion; and an RFID controller coupled to the feed. An inverted F antenna according to another embodiment includes a substrate for an RFID device; an active portion coupled to the substrate; a ground plane spaced from the active portion; and a feed coupled to and coplanar with the active portion. An inverted F antenna according to yet another embodiment includes an active portion coupled to the substrate; a ground plane spaced from the active portion; a feed coupled to and coplanar with the active portion; and an extension portion being selectively coupleable to the active portion for altering a wavelength of the inverted F antenna.Type: GrantFiled: August 29, 2007Date of Patent: July 24, 2012Assignee: Intelleflex CorporationInventors: Thomas Birnbaum, Sireesha Ramisetti, Edmond Sardariani
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Patent number: 8217849Abstract: An antenna system for a Radio Frequency Identification (RFID) tag in one embodiment includes a base portion; at least one angled portion oriented to have a tangential angle of between about 1 degree and about 179 degrees from a plane of the base portion; and an antenna trace on the at least one angled portion. An antenna system for an RFID tag in another embodiment includes a base portion; at least one angled portion having at least two sections each oriented to have a tangential angle of between about 1 degree and about 179 degrees from a plane of the base portion, the two sections having different overall angles relative to the base portion; and an antenna trace on the at least one angled portion. Additional systems and methods are presented.Type: GrantFiled: April 7, 2008Date of Patent: July 10, 2012Assignee: Intelleflex CorporationInventors: Edmond Sardariani, Sireesha Ramisetti
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Patent number: 8179231Abstract: A chipless RFID tag system having a transmitter sending an input signal and a tag substrate. The tag substrate has at least one microstrip and the microstrip has a first portion with a first impedance and a second portion with a second impedance different from the first impedance. The system further includes a receiver detecting at least two reflections from an interface of the first and second impedances and identifying relative time domain positions of the reflections to one another.Type: GrantFiled: September 28, 2007Date of Patent: May 15, 2012Assignee: Louisiana Tech Research FoundationInventors: Khodadad Varahramyan, Mangilal Agarwal, Sudhir Shrestha, Jeevan Kumar Vemagiri, Aravind Chamarti, Sireesha Ramisetti
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Publication number: 20100007570Abstract: An antenna system for a Radio Frequency Identification (RFID) tag in one embodiment includes a base portion; at least one angled portion oriented to have a tangential angle of between about 1 degree and about 179 degrees from a plane of the base portion; and an antenna trace on the at least one angled portion. An antenna system for an RFID tag in another embodiment includes a base portion; at least one angled portion having at least two sections each oriented to have a tangential angle of between about 1 degree and about 179 degrees from a plane of the base portion, the two sections having different overall angles relative to the base portion; and an antenna trace on the at least one angled portion. Additional systems and methods are presented.Type: ApplicationFiled: April 7, 2008Publication date: January 14, 2010Inventors: Edmond Sardariani, Sireesha Ramisetti
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Publication number: 20090058656Abstract: An RFID device according to one embodiment includes an inverted F antenna having an active portion, a ground plane spaced from the active portion, and a feed coupled to and coplanar with the active portion; and an RFID controller coupled to the feed. An inverted F antenna according to another embodiment includes a substrate for an RFID device; an active portion coupled to the substrate; a ground plane spaced from the active portion; and a feed coupled to and coplanar with the active portion. An inverted F antenna according to yet another embodiment includes an active portion coupled to the substrate; a ground plane spaced from the active portion; a feed coupled to and coplanar with the active portion; and an extension portion being selectively coupleable to the active portion for altering a wavelength of the inverted F antenna.Type: ApplicationFiled: August 29, 2007Publication date: March 5, 2009Inventors: Thomas Birnbaum, Sireesha Ramisetti, Edmond Sardariani