Patents by Inventor In Chul Hyun

In Chul Hyun 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: 11949634
    Abstract: Technologies directed to a control circuit using dynamic signal compression are described. A control circuit includes a front-end module (FEM) coupled to an RF cable, the FEM having a low-noise amplifier (LNA). The control circuit further includes an automatic gain control (AGC) circuitry coupled to the FEM. The AGC circuitry receives a first radio frequency (RF) signal having a first portion of one or more symbols and a second portion of one or more symbols. The AGC circuitry further amplifies the first portion to generate a first portion of an output signal. The AGC circuitry further compresses the second portion to obtain a second portion of the output signal. The AGC circuitry further sends a control signal to cause the FEM to change a gain state value of the LNA from a first value to a second value based on a comparison between a voltage of the output signal and a reference voltage.
    Type: Grant
    Filed: March 28, 2022
    Date of Patent: April 2, 2024
    Assignee: Amazon Technologies, Inc.
    Inventors: Nathan Labadie, Divya Naveenan, In Chul Hyun, Cheol Su Kim
  • Patent number: 11388573
    Abstract: Devices, systems, and methods are provided for enhanced near-field communications for wireless devices. A processor of a first device may send a first Bluetooth communication at a first signal strength. The processor may receive a first indication of activity associated with a near field communication (NFC) device of the first device, wherein the processor and the NFC device are collocated on the first device. The processor may determine a second signal strength associated with a second Bluetooth communication, the second signal strength less than the first signal strength. The processor may receive a second indication that the activity associated with the NFC device has concluded. The processor may decrease a power supplied to the NFC device.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: July 12, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Morris Yuanhsiang Hsu, In Chul Hyun, Naman B. Barmecha
  • Patent number: 11368173
    Abstract: Wireless mesh network (WMN) architectures of network hardware devices organized in a mesh topology is described. One device communicates, using a first radio, first data with a second device via a first wireless link between the device and the second device. The device communicates, using a second radio, second data with a third device via a second wireless link between the device and the third device. The device communicates, using a third radio, third data with a fourth device via a third wireless link between the device and the fourth device. The device communicates, using a fourth radio, fourth data with a server of a content delivery network (CDN) via a point-to-point wireless link between the device and the server. The device is an only ingress point for content files for a mesh network that includes at least the device, the second device, and the third device.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: June 21, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Varadarajan Gopalakrishnan, Andrew David Price, In Chul Hyun, Jin Dong Kim, Subram Narasimhan
  • Patent number: 11218203
    Abstract: Technologies directed to coordinated dynamic analog beamforming are described. One method includes receiving, by a digital controller of a first wireless device, a data packet, the data packet comprising a destination address of a second wireless device. The method further includes retrieving, from memory, beamformer configuration data associated with the destination address, the beamformer configuration data comprising a phase shifter angle value for a radiation pattern. The method sends, to a beamformer circuit, the phase shifter angle value, the beamformer circuit comprises a power splitter and a set of phase shifters (e.g., at least four). The method causes the set of phase shifters to steer the radiation pattern of electromagnetic energy, radiated by an antenna array of elements, at the phase shifter angle value and sends the data packet to the second wireless device via the antenna array.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: January 4, 2022
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, Kun Ting Tsai, Haritha Tamvada, Kwok Shing Lee, Cheol Su Kim, Omar Fawazhashim Zakaria, In Chul Hyun, Ali Mirkamali, Dan Richard Brukwinski
  • Patent number: 11196155
    Abstract: Devices, systems, and methods are provided for improving antenna isolation for collocated antennae. A device may include a first radio associated with a first antenna to transmit and receive first wireless signals using a first wireless communication technique. The device may include associated with a second antenna to transmit and receive second wireless signals using a second wireless communication technique. The device may include a multi-antenna isolation structure having a first portion and a second portion separated from the first portion, the first portion and the second portion are able to prevent the first antenna from receiving a portion of current associated with the second antenna.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: December 7, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Mohammed Ziaul Azad, Chen Chen, Amit Gaikwad, In Chul Hyun
  • Patent number: 11158952
    Abstract: Technologies directed to cylindrical antenna structures. One metallic cylindrical antenna structure includes a first surface, a second surface, and a side wall with a first height. The cylindrical antenna structure can have a low profile with the first height being less than 20 millimeters (mm). The side wall includes first and second slots, the first being centered at a first point on the side wall at a second height and oriented longitudinally along an azimuthal direction of the cylindrical antenna structure and the second being centered at a second point on the side wall at the second height and oriented longitudinally along the azimuthal direction. A feed structure is located on the center axis and is physically separated from the first and second surfaces. The cylindrical antenna structure radiates electromagnetic energy in an omnidirectional radiation pattern, responsive to a radio frequency (RF) signal being applied to the feed structure.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: October 26, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Mohammed Ziaul Azad, Chen Chen, Amit Gaikwad, In Chul Hyun
  • Patent number: 11140353
    Abstract: A streaming media player includes a printed circuit board, a video processor, a wireless communications processor, and a patch antenna. The patch antenna includes dielectric material, a conductive patch, and a first antenna feed in a first position with respect to the conductive patch. The patch antenna includes a second antenna feed in a second position with respect to the conductive patch. The first position is orthogonal to the second position. In an embodiment, the second position is rotationally offset from the first position by 90 degrees around an axis through a center of the conductive patch. The streaming media player includes a connector coupled to the video processor and configured to removably couple to a connection port on a display device.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: October 5, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Mohammed Ziaul Azad, In Chul Hyun, Chen Chen, Amit Gaikwad, Jagan Vaidyanathan Rajagopalan, Deepak Pai Hosadurga
  • Patent number: 11134298
    Abstract: A device includes a substrate and a video processor on the substrate. A first patch antenna is mounted to the substrate and configured to transmit and receive radio frequency signals in a frequency range. The first patch antenna is closer to a first end of the substrate than a second end of the substrate. A second patch antenna is mounted to the substrate and is configured to transmit and receive radio frequency signals in the frequency range. The second patch antenna is closer to the first end of the substrate than the second end of the substrate. The substrate includes a ground isolation region between at least one of the first patch antenna and the second patch antenna and the video processor. A media connector is on the substrate and electrically connected to the video processor.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: September 28, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Jagan Vaidyanathan Rajagopalan, Ming-Wei Liu, Peruvemba Ranganath Sai Ananthanarayanan, In Chul Hyun, Mohammed Ziaul Azad, Deepak Pai Hosadurga, Sudheep Thota
  • Patent number: 11075465
    Abstract: Technologies for wireless network devices with surface-link antenna systems mounted on exterior surfaces of buildings are described. One wireless network device includes a housing with a circuit board and a first antenna port. A processor, a first antenna, a first wireless local area network (WLAN) radio, and a second WLAN radio are disposed on the circuit board. The first WLAN radio communicates with a radio of a client device using the first antenna over a first line-of-sight (LOS) or non-LOS wireless link (e.g., 2.4 GHz) inside the building. The second WLAN radio communicates with a radio of a second wireless network device using the second antenna over a second LOS wireless link (e.g., 5 GHz) that is external to the building. The first antenna is located inside the building and the second antenna is located along an exterior surface of the building.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: July 27, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, Omar Fawazhashim Zakaria, Kwok Shing Lee, Kalyan Teja Posani, Ali Mirkamali, Cheol Su Kim, In Chul Hyun
  • Patent number: 11043985
    Abstract: Technologies directed to cable-loss compensation are described. An apparatus includes a triplexer, a front-end module (FEM) circuit, and a control circuit. The triplexer is coupled to a radio frequency (RF) cable. The triplexer receives a first RF signal and a DC power signal from a device via the RF cable and sends a detection signal being indicative of a transmit power level of the first RF signal to the device via the RF cable. The transmit power level includes an insertion loss of the RF cable. The FEM circuit is coupled to the triplexer and includes a power amplifier (PA). The control circuit is coupled to the triplexer and measures the transmit power level of the first RF signal and converts the first RF signal into the detection signal. The control circuit sends the detection signal back to the device via the RF cable and enables the PA.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: June 22, 2021
    Assignee: Amazon Technologies, Inc.
    Inventors: Nathan Labadie, Cheol Su Kim, Ravi Ichapurapu, Kalyan Teja Posani, Omar Fawazhashim Zakaria, In Chul Hyun
  • Publication number: 20200127688
    Abstract: Wireless mesh network (WMN) architectures of network hardware devices organized in a mesh topology is described. One device communicates, using a first radio, first data with a second device via a first wireless link between the device and the second device. The device communicates, using a second radio, second data with a third device via a second wireless link between the device and the third device. The device communicates, using a third radio, third data with a fourth device via a third wireless link between the device and the fourth device. The device communicates, using a fourth radio, fourth data with a server of a content delivery network (CDN) via a point-to-point wireless link between the device and the server. The device is an only ingress point for content files for a mesh network that includes at least the device, the second device, and the third device.
    Type: Application
    Filed: December 10, 2019
    Publication date: April 23, 2020
    Inventors: Varadarajan Gopalakrishnan, Andrew David Price, In Chul Hyun, Jin Dong Kim, Subram Narasimhan
  • Patent number: 10615514
    Abstract: An apparatus includes an elongated housing having a first plurality of sidewalls that form a first isolation chamber on a first side of the elongated housing. A first printed circuit board (PCB) includes a first patch element, wherein the PCB defines a first plane. A first parasitic element disposed in a second plane, wherein the first parasitic element is retained a predetermined distance from the first patch element in the first plane. A second PCB is disposed within the elongated housing. A first radio is disposed on the second PCB, wherein the first radio is coupled to the first patch element, and wherein the first patch element and the first parasitic element, in response to radio frequency (RF) signals from the first radio, radiate electromagnetic energy in a first direction away from the first isolation chamber.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: April 7, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, Troy Hulick, In Chul Hyun
  • Patent number: 10616904
    Abstract: A device includes first and second directional antennas, an omnidirectional antenna, and a switch selectively coupled between the first directional and omnidirectional antennas. A first radio includes first RF circuitry. A switch selectively couples the first omnidirectional antenna or the first directional antenna to the first radio. A second radio is coupled to the second directional antenna and includes second RF circuitry. An application processor receives, from first RF circuitry, a first radio frequency performance indicator (RFPI) value for signals received over the omnidirectional antenna, a second RFPI value for signals received over the first directional antenna, and, from the second RF circuitry, a third RPI value for signals received over the second directional antenna. The application processor determines a best RFPI value, selects an antenna corresponding to the best RFPI value, and selects a radio corresponding to the selected antenna.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: April 7, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Ali Mirkamali, Tzung-I Lee, Omar Fawazhashim Zakaria, Kalyan Teja Posani, In Chul Hyun, Cheol Su Kim
  • Patent number: 10560127
    Abstract: Network hardware devices organized in a Wireless mesh network (WMN) in which the network hardware devices cooperate in distribution of content files to client consumption devices in an environment of limited connectivity to broadband Internet infrastructure are described. One mesh network device includes a housing including reflective chambers within with multiple antennas are disposed. A first radio is operable to cause a first antenna to radiate electromagnetic energy in a first frequency range and a first reflector chamber is operable to reflect the electromagnetic energy in a first direction away from the housing. Second, third, and fourth radios are operable to cause the respective antennas within the respective reflective chambers to radiate electromagnetic energy and the respective reflective chamber is to reflect the electromagnetic energy in a respective direction away from the housing.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: February 11, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, In Chul Hyun, Omar Fawazhashim Zakaria
  • Publication number: 20200021038
    Abstract: Technologies for wireless network devices with surface-link antenna systems mounted on exterior surfaces of buildings are described. One wireless network device includes a housing with a circuit board and a first antenna port. A processor, a first antenna, a first wireless local area network (WLAN) radio, and a second WLAN radio are disposed on the circuit board. The first WLAN radio communicates with a radio of a client device using the first antenna over a first line-of-sight (LOS) or non-LOS wireless link (e.g., 2.4 GHz) inside the building. The second WLAN radio communicates with a radio of a second wireless network device using the second antenna over a second LOS wireless link (e.g., 5 GHz) that is external to the building. The first antenna is located inside the building and the second antenna is located along an exterior surface of the building.
    Type: Application
    Filed: July 13, 2018
    Publication date: January 16, 2020
    Inventors: Tzung-I Lee, Omar Fawazhashim Zakaria, Kwok Shing Lee, Kalyan Teja Posani, Ali Mirkamali, Cheol Su Kim, In Chul Hyun
  • Patent number: 10523247
    Abstract: Wireless mesh network (WMN) architectures of network hardware devices organized in a mesh topology in which the network hardware devices cooperate in distribution of content files to client consumption devices in an environment of limited connectivity to broadband Internet infrastructure is described. A self-contained, fully connected WMN can be used for localized delivery of content files. One WMN includes a single ingress node for ingress of content files into the wireless mesh network. The WMN also includes multiple network hardware devices wirelessly connected through a network backbone formed by multiple P2P wireless connections. A first network hardware device is wirelessly connected to a client consumption device by a first node-to-client (N2C) wireless connection and a second network hardware device is wirelessly connected to the single ingress node.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: December 31, 2019
    Assignee: Amazon Technologies, Inc.
    Inventors: Varadarajan Gopalakrishnan, Andrew David Price, In Chul Hyun, Jin Dong Kim, Subram Narasimhan
  • Publication number: 20190364239
    Abstract: A streaming media player includes a printed circuit board, a video processor, a wireless communications processor, and a patch antenna. The patch antenna includes dielectric material, a conductive patch, and a first antenna feed in a first position with respect to the conductive patch. The patch antenna includes a second antenna feed in a second position with respect to the conductive patch. The first position is orthogonal to the second position. In an embodiment, the second position is rotationally offset from the first position by 90 degrees around an axis through a center of the conductive patch. The streaming media player includes a connector coupled to the video processor and configured to removably couple to a connection port on a display device.
    Type: Application
    Filed: January 23, 2019
    Publication date: November 28, 2019
    Inventors: Mohammed Ziaul AZAD, In Chul HYUN, Chen CHEN, Amit GAIKWAD, Jagan Vaidyanathan RAJAGOPALAN, Deepak Pai HOSADURGA
  • Publication number: 20190364324
    Abstract: A device includes a substrate and a video processor on the substrate. A first patch antenna is mounted to the substrate and configured to transmit and receive radio frequency signals in a frequency range. The first patch antenna is closer to a first end of the substrate than a second end of the substrate. A second patch antenna is mounted to the substrate and is configured to transmit and receive radio frequency signals in the frequency range. The second patch antenna is closer to the first end of the substrate than the second end of the substrate. The substrate includes a ground isolation region between at least one of the first patch antenna and the second patch antenna and the video processor. A media connector is on the substrate and electrically connected to the video processor.
    Type: Application
    Filed: May 22, 2018
    Publication date: November 28, 2019
    Inventors: Jagan Vaidyanathan RAJAGOPALAN, Ming-Wei LIU, Peruvemba Ranganath SAI ANANTHANARAYANAN, In Chul HYUN, Mohammed Ziaul AZAD, Deepak Pai HOSADURGA, Sudheep THOTA
  • Patent number: 10447378
    Abstract: Network hardware devices organized in a wireless mesh network (WMN) in which a home access node (HAN) device that includes a first set of radios, each of the first set of radios being coupled to a beam-steering antenna and each of the first set of radios establishing a first point-to-point (PtP) wireless connection over which the HAN relay device communicates with a second HAN relay device in a first sub-mesh network of HAN relay devices. The HAN device also includes a second set of radios, each of the second set of radios being coupled to a beam-steering antenna and each of the second set of radios establishing a second PtP wireless connection over which the HAN relay device communicates with at least one of a plurality of HAN devices in a second sub-mesh network in the WMN.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: October 15, 2019
    Assignee: Amazon Technologies, Inc.
    Inventors: Jin Dong Kim, Sang Eun Lee, In Chul Hyun, Cheol Su Kim, Subram Narasimhan, Varadarajan Gopalakrishnan, Omar Fawazhashim Zakaria
  • Patent number: 10361490
    Abstract: Antenna structures and methods of operating the same of an electronic device are described. One apparatus includes a radio coupled to a RF feed and an RF switch, a first antenna element coupled to the RF feed, and a second antenna element coupled to the RF switch, the RF switch being coupled to a grounding point of a ground plane. The radio controls the RF switch between a first mode and a second mode. The radio causes the first antenna element to radiate electromagnetic energy in a first radiation pattern in the first mode and causes the second antenna element to radiate electromagnetic energy in a second radiation pattern in the second mode. The second radiation pattern is different than the first radiation pattern.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: July 23, 2019
    Assignee: Amazon Technologies, Inc.
    Inventors: Tzung-I Lee, In Chul Hyun