Patents by Inventor Amir Jafargholi
Amir Jafargholi 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: 11515641Abstract: A system for EMNZ metamaterial-based direct antenna modulation. The system includes a signal generator, a metamaterial switch and an antenna. The signal generator may is configured to generate a microwave signal. The metamaterial switch is configured to generate a modulated microwave signal from the microwave signal. The modulated microwave signal is generated by selectively passing the microwave signal through the metamaterial switch. The metamaterial switch includes a first conductive plate and a first loaded conductive plate. The first loaded conductive plate includes a second conductive plate and a first monolayer graphene. The first monolayer graphene includes a first tunable conductivity. The first monolayer graphene is positioned between the first conductive plate and the second conductive plate. An effective permittivity of the metamaterial switch is configured to be adjusted to a predetermined value.Type: GrantFiled: March 20, 2021Date of Patent: November 29, 2022Assignee: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Patent number: 11515640Abstract: A system for EMNZ metamaterial-based direct antenna modulation. The system includes a signal generator, a metamaterial switch and an antenna. The signal generator may is configured to generate a microwave signal. The metamaterial switch is configured to generate a modulated microwave signal from the microwave signal. The modulated microwave signal is generated by selectively passing the microwave signal through the metamaterial switch. The metamaterial switch includes a first conductive plate and a first loaded conductive plate. The first loaded conductive plate includes a second conductive plate and a first monolayer graphene. The first monolayer graphene includes a first tunable conductivity. The first monolayer graphene is positioned between the first conductive plate and the second conductive plate. An effective permittivity of the metamaterial switch is configured to be adjusted to a predetermined value.Type: GrantFiled: February 21, 2021Date of Patent: November 29, 2022Assignee: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Patent number: 11499919Abstract: A method for determining sucrose concentration in honey. The method includes preparing a sample of honey, stimulating the sample by emitting a first laser beam on the sample in a first stimulation direction, detecting a fluorescence spectrum from a first fluorescence emission emitted from the sample in a first detection direction, detecting a first pair of fluorescence peaks and a second pair of peak wavelengths in the fluorescence spectrum, and determining a sucrose concentration based on one of the first pair and the second pair utilizing a database. The database includes a plurality of predetermined sucrose concentrations associated with the first pair or the second pair.Type: GrantFiled: March 18, 2021Date of Patent: November 15, 2022Assignee: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Ali Bavali, Alireza Mashhadi, Amir Jafargholi, Mohsen Hashemi, Farzad Mokhtari
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Patent number: 11502383Abstract: An epsilon-and-mu-near-zero (EMNZ) metamaterial. The EMNZ metamaterial includes a waveguide. A length l of the waveguide satisfies a length condition according to l?0.1?, where ? is an operating wavelength of the EMNZ metamaterial. The EMNZ metamaterial further includes a magneto-dielectric material deposited on a lower wall of the waveguide. The waveguide includes an impedance surface placed on the magneto-dielectric material.Type: GrantFiled: November 12, 2020Date of Patent: November 15, 2022Assignee: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Patent number: 11495868Abstract: A metamaterial switch. The metamaterial switch includes a first conductive plate, a first loaded conductive plate, and a magneto-dielectric material. The first loaded conductive plate includes a second conductive plate and a first tunable impedance surface set. Each tunable impedance surface in the first tunable impedance surface set includes a respective tunable conductivity. An effective permittivity of the metamaterial switch is configured to be adjusted to a first predetermined value. The effective permittivity of the metamaterial switch is adjusted responsive to tuning a respective tunable conductivity of each respective tunable impedance surface in the first tunable impedance surface set.Type: GrantFiled: February 3, 2021Date of Patent: November 8, 2022Assignee: AMIRKABIR UNIVERSITY OF TEHRANInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Patent number: 11402327Abstract: A method for optical imaging based on spectral shift assessment. The method includes generating a sample by mixing an object with a fluorophore, stimulating the sample by emitting a laser beam, extracting a plurality of fluorescence spectra from a plurality of fluorescence emissions emitted from the sample, detecting a plurality of fluorescence peaks and a plurality of peak wavelengths in the plurality of fluorescence spectra, extracting a plurality of fluorophore concentrations from a database, and generating a concentration image. The plurality of peak wavelengths are detected by detecting a respective peak wavelength of the plurality of peak wavelengths. Each of the plurality of fluorophore concentrations is associated with a respective peak wavelength of the plurality of peak wavelengths. The concentration image includes a first plurality of pixels. The concentration image is generated based on a respective fluorophore concentration of the plurality of fluorophore concentrations.Type: GrantFiled: December 8, 2019Date of Patent: August 2, 2022Inventors: Parviz Parvin, Amir Jafargholi, Ali Bavali, Mohammad Amin Bassam, Parisa Zhalefar, Azadeh Niazi, Seyed Ali Dehghanian, Zahra Khodabakshi
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Publication number: 20220006199Abstract: A metamaterial loaded antenna. The metamaterial loaded antenna includes a dielectric substrate, a first arm, a second arm, a feed point, and a metamaterial structure. The first arm and the second arm are placed on the dielectric substrate. The feed point includes at least one gap between the first arm and the second arm. A metamaterial structure is inserted in the feed point. The metamaterial structure includes a single negative (SNG) metamaterial. The SNG metamaterial includes a first permittivity ?1 and a first permeability ?1. The first permittivity ?1 and the first permeability ?1 satisfy a condition according to ?1?1<0.Type: ApplicationFiled: September 20, 2021Publication date: January 6, 2022Applicants: Amirkabir University of TechnologyInventors: Amir Jafargholi, Seyed Saleh Mousavi Khaleghi, Kamyar Goudarzi, Mehran Ahadi, Parviz Parvin
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Patent number: 11088458Abstract: A microstrip antenna is disclosed. The microstrip antenna includes a dielectric substrate with a first relative permittivity, a metal patch, and a magneto-dielectric superstrate. The metal patch is printed on the dielectric substrate, and the magneto-dielectric superstrate is placed above the metal patch.Type: GrantFiled: December 30, 2018Date of Patent: August 10, 2021Assignees: AMIRKABIR UNIVERSITY OF TECHNOLOGYInventors: Amir Jafargholi, Ali Jafargholi, Mehdi Veysi, Jun H. Choi
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Publication number: 20210210859Abstract: A microstrip antenna is disclosed. The microstrip antenna includes a dielectric substrate with a first relative permittivity, a metal patch, and a magneto-dielectric superstrate. The metal patch is printed on the dielectric substrate, and the magneto-dielectric superstrate is placed above the metal patch.Type: ApplicationFiled: March 20, 2021Publication date: July 8, 2021Applicants: Amirkabir University of TechnologyInventors: Amir Jafargholi, Ali Jafargholi, Mehdi Veysi, Jun H. Choi
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Publication number: 20210210860Abstract: A system for EMNZ metamaterial-based direct antenna modulation. The system includes a signal generator, a metamaterial switch and an antenna. The signal generator may is configured to generate a microwave signal. The metamaterial switch is configured to generate a modulated microwave signal from the microwave signal. The modulated microwave signal is generated by selectively passing the microwave signal through the metamaterial switch. The metamaterial switch includes a first conductive plate and a first loaded conductive plate. The first loaded conductive plate includes a second conductive plate and a first monolayer graphene. The first monolayer graphene includes a first tunable conductivity. The first monolayer graphene is positioned between the first conductive plate and the second conductive plate. An effective permittivity of the metamaterial switch is configured to be adjusted to a predetermined value.Type: ApplicationFiled: March 20, 2021Publication date: July 8, 2021Applicant: Amirkabir University of TechnologyInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Publication number: 20210199589Abstract: A method for determining sucrose concentration in honey. The method includes preparing a sample of honey, stimulating the sample by emitting a first laser beam on the sample in a first stimulation direction, detecting a fluorescence spectrum from a first fluorescence emission emitted from the sample in a first detection direction, detecting a first pair of fluorescence peaks and a second pair of peak wavelengths in the fluorescence spectrum, and determining a sucrose concentration based on one of the first pair and the second pair utilizing a database. The database includes a plurality of predetermined sucrose concentrations associated with the first pair or the second pair.Type: ApplicationFiled: March 18, 2021Publication date: July 1, 2021Applicants: Amirkabir University of TechnologyInventors: Ali Bavali, Alireza Mashhadi, Amir Jafargholi, Mohsen Hashemi, Farzad Mokhtari
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Publication number: 20210194143Abstract: A system for EMNZ metamaterial-based direct antenna modulation. The system includes a signal generator, a metamaterial switch and an antenna. The signal generator may is configured to generate a microwave signal. The metamaterial switch is configured to generate a modulated microwave signal from the microwave signal. The modulated microwave signal is generated by selectively passing the microwave signal through the metamaterial switch. The metamaterial switch includes a first conductive plate and a first loaded conductive plate. The first loaded conductive plate includes a second conductive plate and a first monolayer graphene. The first monolayer graphene includes a first tunable conductivity. The first monolayer graphene is positioned between the first conductive plate and the second conductive plate. An effective permittivity of the metamaterial switch is configured to be adjusted to a predetermined value.Type: ApplicationFiled: February 21, 2021Publication date: June 24, 2021Applicant: Amirkabir University of TechnologyInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Publication number: 20210184323Abstract: A metamaterial switch. The metamaterial switch includes a first conductive plate, a first loaded conductive plate, and a magneto-dielectric material. The first loaded conductive plate includes a second conductive plate and a first tunable impedance surface set. Each tunable impedance surface in the first tunable impedance surface set includes a respective tunable conductivity. An effective permittivity of the metamaterial switch is configured to be adjusted to a first predetermined value. The effective permittivity of the metamaterial switch is adjusted responsive to tuning a respective tunable conductivity of each respective tunable impedance surface in the first tunable impedance surface set.Type: ApplicationFiled: February 3, 2021Publication date: June 17, 2021Applicant: Amirkabir University of TechnologyInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Publication number: 20210083396Abstract: An epsilon-and-mu-near-zero (EMNZ) metamaterial. The EMNZ metamaterial includes a waveguide. A length l of the waveguide satisfies a length condition according to l?0.1?, where ? is an operating wavelength of the EMNZ metamaterial. The EMNZ metamaterial further includes a magneto-dielectric material deposited on a lower wall of the waveguide. The waveguide includes an impedance surface placed on the magneto-dielectric material.Type: ApplicationFiled: November 12, 2020Publication date: March 18, 2021Applicant: Amirkabir University of TechnologyInventors: Mehran Ahadi, Amir Jafargholi, Parviz Parvin
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Patent number: 10879618Abstract: A substrate integrated waveguide (SIW) slot antenna may include a substrate that may have a first substrate portion with a first permittivity less than unity and a second substrate portion with a second permittivity. The substrate may include a top surface and a bottom surface. The exemplary SIW slot antenna may further include a first conductive layer disposed on the top surface, a second conductive layer disposed on the bottom surface, a transverse slot on the first conducting layer, waveguide sidewalls that may include a plurality of spaced-apart metal-lined vias traversing the substrate, and a microstrip feed line on the first conducting layer.Type: GrantFiled: February 20, 2019Date of Patent: December 29, 2020Inventors: Mohammad Hossein Mazaheri Kalahrudi, Amir Jafargholi, Jalaledin Tayebpour, Alireza Jahanbakhshi, Mahmood Akbari
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Publication number: 20200110031Abstract: A method for optical imaging based on spectral shift assessment. The method includes generating a sample by mixing an object with a fluorophore, stimulating the sample by emitting a laser beam, extracting a plurality of fluorescence spectra from a plurality of fluorescence emissions emitted from the sample, detecting a plurality of fluorescence peaks and a plurality of peak wavelengths in the plurality of fluorescence spectra, extracting a plurality of fluorophore concentrations from a database, and generating a concentration image. The plurality of peak wavelengths are detected by detecting a respective peak wavelength of the plurality of peak wavelengths. Each of the plurality of fluorophore concentrations is associated with a respective peak wavelength of the plurality of peak wavelengths. The concentration image includes a first plurality of pixels. The concentration image is generated based on a respective fluorophore concentration of the plurality of fluorophore concentrations.Type: ApplicationFiled: December 8, 2019Publication date: April 9, 2020Applicants: Amirkabir University of TechnologyInventors: Parviz Parvin, Amir Jafargholi, Ali Bavali, Mohammad Amin Bassam, Parisa Zhalefar, Azadeh Niazi, Seyed Ali Dehghanian, Zahra Khodabakshi
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Publication number: 20190181559Abstract: A substrate integrated waveguide (SIW) slot antenna may include a substrate that may have a first substrate portion with a first permittivity less than and a second substrate portion with a second permittivity. The substrate may include a top surface and a bottom surface. The exemplary SIW slot antenna may further include a first conductive layer disposed on the top surface, a second conductive layer disposed on the bottom surface, a transverse slot on the first conducting layer, waveguide sidewalls that may include a plurality of spaced-apart metal-lined vias traversing the substrate, and a microstrip feed line on the first conducting layer.Type: ApplicationFiled: February 20, 2019Publication date: June 13, 2019Applicants: Amirkabir University of TechnologyInventors: Mohammad Hossein Mazaheri Kalahrudi, Amir Jafargholi, Jalaledin Tayebpour, Alireza Jahanbakhshi, Mahmood Akbari
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Publication number: 20190140348Abstract: A microstrip antenna is disclosed. The microstrip antenna includes a dielectric substrate with a first relative permittivity, a metal patch, and a magneto-dielectric superstrate. The metal patch is printed on the dielectric substrate, and the magneto-dielectric superstrate is placed above the metal patch.Type: ApplicationFiled: December 30, 2018Publication date: May 9, 2019Applicants: Amirkabir University of TechnologyInventors: Amir Jafargholi, Ali Jafargholi, Mehdi Veysi, Jun H. Choi