Patents by Inventor Seunghwan Yoon

Seunghwan Yoon 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).

  • Patent number: 11057101
    Abstract: An active repeater device includes a primary sector and at least a secondary sector communicatively coupled to the primary sector receives or transmits a first beam of input RF signals having a first beam pattern from or to a base station, respectively. The primary sector includes an baseband signal processor and a first radio head (RH) unit. The secondary sector comprises a second RH unit. The first beam pattern covers a first geographical area. Beamforming coefficients are generated to convert the first beam pattern of the first beam of input RF signals to a second beam pattern. A second beam of output RF signals in the second beam pattern is transmitted from or received by, respectively, the secondary sector to or from, respectively, a plurality of user equipment (UEs) based on the generated beamforming coefficients and the received first beam of input RF signals.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: July 6, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 11056795
    Abstract: An antenna system includes a first substrate, a plurality of chips and a waveguide antenna element based beam forming phased array that includes a plurality of radiating waveguide antenna cells for millimeter wave communication. Each radiating waveguide antenna cell includes a plurality of pins where a first pin is connected with a body of a corresponding radiating waveguide antenna cell and the body corresponds to ground for the pins. The first pin includes a first and a second current path, the first current path being longer than the second current path. A first end of the radiating waveguide antenna cells is mounted on the first substrate, where the plurality of chips are electrically connected with the plurality of pins and the ground of each of the plurality of radiating waveguide antenna cells to control beamforming through a second end of the plurality of radiating waveguide antenna cells for the communication.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: July 6, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Seunghwan Yoon, Ahmadreza Rofougaran, Sam Gharavi, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran, Alfred Grau Besoli, Enver Adas
  • Patent number: 11057077
    Abstract: In a first radio frequency (RF) device, circuits determine a non-line-of-sight (NLOS) radio path, and select a first plurality of reflector devices associated with the NLOS radio path from a second plurality of reflector devices. The first plurality of reflector devices, are selected based on a first set of criteria, includes an active reflector device and a passive reflector device, and are controlled to transmit a plurality of RF signals to a second RF device based on a second set of criteria. The second RF device is associated with electronic devices. The first RF signal interferes with a second RF signal of the RF signals. A first type of signal associated with the plurality of RF signals is converted to a second type of signal at the second RF device, and the second type of signal is transmitted by the second RF device to the one or more electronic devices.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: July 6, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Ahmadreza Rofougaran, Seunghwan Yoon
  • Patent number: 11056764
    Abstract: A phased array antenna panel includes a first plurality of antennas, a first radio frequency (RF) front end chip, a second plurality of antennas, a second RF front end chip, and a combiner RF chip. The first and second RE front end chips receive respective first and second input signals from the first and second pluralities of antennas, and produce respective first and second output signals based on the respective first and second input signals. The combiner RF chip can receive the first and second output signals and produce a power combined output signal that is a combination of powers of the first and second output signals. Alternatively, a power combiner can receive the first and second output signals and produce a power combined output signal, and the combiner RF chip can receive the power combined output signal.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: July 6, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Ahmadreza Rofougaran, Seunghwan Yoon, Alfred Grau Besoli, Farid Shirinfar, Sam Gharavi, Michael Boers, Maryam Rofougaran
  • Patent number: 11050482
    Abstract: An active repeater device including a first antenna array, a controller, and one or more secondary sectors receives or transmits a first beam of input RF signals from or to, respectively, a first base station operated by a first service provider and a second beam of input RF signals from or to, respectively, a second base station operated by a second service provider. A controller assigns a first beam setting to a first group of customer premises equipment (CPEs) and a second beam setting to a second group of CPEs, based on one or more corresponding signal parameters associated with the each corresponding group of CPEs. A second antenna array of the second RH unit concurrently transmits or received a first beam of output RF signals to or from the first group of CPEs and a second beam of output RF signals to the second group of CPEs.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: June 29, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Publication number: 20210167843
    Abstract: An active repeater device includes a primary sector and one or more secondary sectors, receives a first beam of input RF signals. A first set of analog baseband signals, are generated based on received first beam of input RF signals. The first set of analog baseband signals are converted to a first set of coded data signals and control information is extracted from the first set of coded data signals by decoding only a header portion of the first set of coded data signals without demodulation of data portion of the first set of coded data signals. Based on the extracted control information, the first set of coded data signals are transmitted as beams of output RF signals to remote user equipment. The transmission is independent of demodulation of the data portion within the active repeater device to reduce latency for transmission of the first set of coded data signals.
    Type: Application
    Filed: February 9, 2021
    Publication date: June 3, 2021
    Inventors: Sam GHARAVI, Ahmadreza ROFOUGARAN, Michael BOERS, Seunghwan YOON, Kartik SRIDHARAN, Donghyup SHIN, Farid SHIRINFAR, Stephen WU, Maryam ROFOUGARAN
  • Patent number: 11026100
    Abstract: A system, in an active reflector device, adjusts a first amplification gain of each of a plurality of radio frequency (RF) signals received at a receiver front-end from a first equipment via a first radio path of an NLOS radio path. A first phase shift is performed on each of the plurality of RF signals with the adjusted first amplification gain. A combination of the plurality of first phase-shifted RF signals is split at a transmitter front-end. A second phase shift on each of the split first plurality of first phase-shifted RF signals is performed. A second amplification gain of each of the plurality of second phase-shifted RF signals is adjusted.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: June 1, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Ahmadreza Rofougaran, Sam Gharavi, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 11018751
    Abstract: An active repeater device including a first antenna array, a controller, and one or more secondary sectors receives or transmits a first beam of input RF signals from or to, respectively, a first base station operated by a first service provider and a second beam of input RF signals from or to, respectively, a second base station operated by a second service provider. A controller assigns a first beam setting to a first group of customer premises equipment (CPEs) and a second beam setting to a second group of CPEs, based on one or more corresponding signal parameters associated with the each corresponding group of CPEs. A second antenna array of the second RH unit concurrently transmits or received a first beam of output RF signals to or from the first group of CPEs and a second beam of output RF signals to the second group of CPEs.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: May 25, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 11018723
    Abstract: In a first radio frequency (RF) device, circuits determine a non-line-of-sight (NLOS) radio path, and select a first plurality of reflector devices associated with the NLOS radio path from a second plurality of reflector devices. The first plurality of reflector devices, are selected based on a first set of criteria, includes an active reflector device and a passive reflector device, and are controlled to transmit a plurality of RF signals to a second RF device based on a second set of criteria. The second RF device is associated with electronic devices. The first RF signal interferes with a second RF signal of the RF signals. A first type of signal associated with the plurality of RF signals is converted to a second type of signal at the second RF device, and the second type of signal is transmitted by the second RF device to the one or more electronic devices.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: May 25, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Ahmadreza Rofougaran, Seunghwan Yoon
  • Patent number: 11018409
    Abstract: A phased array antenna panel includes a first plurality of antennas, a first radio frequency (RF) front end chip, a second plurality of antennas, a second RF front end chip, and a combiner RF chip. The first and second RE front end chips receive respective first and second input signals from the first and second pluralities of antennas, and produce respective first and second output signals based on the respective first and second input signals. The combiner RF chip can receive the first and second output signals and produce a power combined output signal that is a combination of powers of the first and second output signals. Alternatively, a power combiner can receive the first and second output signals and produce a power combined output signal, and the combiner RF chip can receive the power combined output signal.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: May 25, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Ahmadreza Rofougaran, Seunghwan Yoon, Alfred Grau Besoli, Farid Shirinfar, Sam Gharavi, Michael Boers, Maryam Rofougaran
  • Patent number: 11018752
    Abstract: An active repeater device includes a primary sector and one or more secondary sectors, receives a first beam of input RF signals. A first set of analog baseband signals, are generated based on received first beam of input RF signals. The first set of analog baseband signals are converted to a first set of coded data signals and control information is extracted from the first set of coded data signals by decoding only a header portion of the first set of coded data signals without demodulation of data portion of the first set of coded data signals. Based on the extracted control information, the first set of coded data signals are transmitted as beams of output RF signals to remote user equipment. The transmission is independent of demodulation of the data portion within the active repeater device to reduce latency for transmission of the first set of coded data signals.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: May 25, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 11009730
    Abstract: A display apparatus includes a display module displaying an image, a rear structure supporting the display module, a vibration generating device vibrating the display module, and a stiff member disposed on a rear surface of the display module. Accordingly, a sound pressure level corresponding to a high frequency domain is prevented from being reduced, thereby enhancing the quality of a sound output to a region in front of a display panel.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: May 18, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: SeungHwan Yoon, KiDuk Kim, DongKyun Lim, JaiHyuk Lee
  • Patent number: 10979129
    Abstract: An active repeater device includes a primary sector and one or more secondary sectors, receives a first beam of input RF signals. A first set of analog baseband signals, are generated based on received first beam of input RF signals. The first set of analog baseband signals are converted to a first set of coded data signals and control information is extracted from the first set of coded data signals by decoding only a header portion of the first set of coded data signals without demodulation of data portion of the first set of coded data signals. Based on the extracted control information, the first set of coded data signals are transmitted as beams of output RF signals to remote user equipment. The transmission is independent of demodulation of the data portion within the active repeater device to reduce latency for transmission of the first set of coded data signals.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: April 13, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 10951274
    Abstract: A system, in a radio frequency (RF) transmitter device, dynamically selects one or more reflector devices along a non-line-of-sight (NLOS) radio path based on a defined criteria. Further, the dynamically selected one or more reflector devices are controlled based on one or more conditions. In an RF receiver device, communicates with the dynamically selected one or more reflector devices comprising an active reflector device. The active reflector device comprises at least a first antenna array and a second antenna array. The first antenna array transmits a first set of beams of RF signals to at least the RF transmitter device and the RF receiver device. The second antenna array receives a second set of beams of RF signals from at least the RF transmitter device and the RF receiver device.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: March 16, 2021
    Assignee: MOVANDI CORPORATION
    Inventors: Seunghwan Yoon, Ahmadreza Rofougaran
  • Patent number: 10944467
    Abstract: An active repeater device includes a primary sector and one or more secondary sectors, receives a first beam of input RF signals. A first set of analog baseband signals, are generated based on received first beam of input RF signals. The first set of analog baseband signals are converted to a first set of coded data signals and control information is extracted from the first set of coded data signals by decoding only a header portion of the first set of coded data signals without demodulation of data portion of the first set of coded data signals. Based on the extracted control information, the first set of coded data signals are transmitted as beams of output RF signals to remote user equipment. The transmission is independent of demodulation of the data portion within the active repeater device to reduce latency for transmission of the first set of coded data signals.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: March 9, 2021
    Assignee: SILICON VALLEY BANK
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Publication number: 20210058116
    Abstract: A system, in a radio frequency (RF) transmitter device, dynamically selects one or more reflector devices along a non-line-of-sight (NLOS) radio path based on a defined criteria. Further, the dynamically selected one or more reflector devices are controlled based on one or more conditions. In an RF receiver device, communicates with the dynamically selected one or more reflector devices comprising an active reflector device. The active reflector device comprises at least a first antenna array and a second antenna array. The first antenna array transmits a first set of beams of RF signals to at least the RF transmitter device and the RF receiver device. The second antenna array receives a second set of beams of RF signals from at least the RF transmitter device and the RF receiver device.
    Type: Application
    Filed: November 6, 2020
    Publication date: February 25, 2021
    Inventors: Seunghwan YOON, Ahmadreza ROFOUGARAN
  • Patent number: 10916861
    Abstract: An apparatus comprising at least a plurality of antenna modules mounted on a printed circuit board (PCB) is disclosed. The PCB includes a plurality of holes embedded with a heat sink. Each antenna module comprises an antenna substrate. Each antenna module further comprises a plurality of three-dimensional (3-D) antenna cells that are mounted on a first surface of the antenna substrate. Each antenna module further comprises a plurality of packaged circuitry that are mounted on a second surface of the antenna substrate. The plurality of packaged circuitry are electrically connected with the plurality of 3-D antenna cells. Furthermore, each antenna module is mounted on the plurality of holes via a corresponding packaged circuitry of the plurality of packaged circuitry.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: February 9, 2021
    Assignee: MOVANDI CORPORATION
    Inventors: Seunghwan Yoon, Zhihui Wang, Franco De Flaviis, Alfred Grau Besoli, Kartik Sridharan, Ahmadreza Rofougaran, Michael Boers, Sam Gharavi, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 10917126
    Abstract: An outphasing calibration method in an outphasing calibration RF transmitter comprises detection of differences of a first plurality of signal characteristics of a first plurality of amplified RF signals across at least a transmitter antenna and a plurality of load impedances. The first plurality of amplified RF signals corresponds to a first plurality of constant-envelope signals. Accordingly, at least a generation of a second plurality of constant-envelope signals and at least one signal characteristic of each of a second plurality of constant-envelope RF signals on a plurality of transmission paths are controlled. At least one of a first calibration or a second calibration of a second plurality of signal characteristics of the second plurality of constant-envelope signals is executed based on the controlled generation of the second plurality of constant-envelope signals and the at least one controlled signal characteristic of each of the second plurality of constant-envelope RF signals.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: February 9, 2021
    Assignee: MOVANDI CORPORATION
    Inventors: Farid Shirinfar, Ahmadreza Rofougaran, Sam Gharavi, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Stephen Wu, Maryam Rofougaran
  • Publication number: 20210028555
    Abstract: An apparatus comprising at least a plurality of antenna modules mounted on a printed circuit board (PCB) is disclosed. The PCB includes a plurality of holes embedded with a heat sink. Each antenna module comprises an antenna substrate. Each antenna module further comprises a plurality of three-dimensional (3-D) antenna cells that are mounted on a first surface of the antenna substrate. Each antenna module further comprises a plurality of packaged circuitry that are mounted on a second surface of the antenna substrate. The plurality of packaged circuitry are electrically connected with the plurality of 3-D antenna cells. Furthermore, each antenna module is mounted on the plurality of holes via a corresponding packaged circuitry of the plurality of packaged circuitry.
    Type: Application
    Filed: October 1, 2020
    Publication date: January 28, 2021
    Inventors: Seunghwan Yoon, Zhihui Wang, Franco De Flaviis, Alfred Grau Besoli, Kartik Sridharan, Ahmadreza Rofougaran, Michael Boers, Sam Gharavi, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 10903878
    Abstract: A system, in a radio frequency (RF) transmitter device, dynamically selects one or more reflector devices along a non-line-of-sight (NLOS) radio path based on a defined criteria. Further, the dynamically selected one or more reflector devices are controlled based on one or more conditions. In an RF receiver device, communicates with the dynamically selected one or more reflector devices comprising an active reflector device. The active reflector device comprises at least a first antenna array and a second antenna array. The first antenna array transmits a first set of beams of RF signals to at least the RF transmitter device and the RF receiver device. The second antenna array receives a second set of beams of RF signals from at least the RF transmitter device and the RF receiver device.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: January 26, 2021
    Assignee: MOVANDI CORPORATION
    Inventors: Seunghwan Yoon, Ahmadreza Rofougaran