Patents by Inventor Mohammed Ziaul AZAD

Mohammed Ziaul AZAD 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: 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
  • 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: 9685705
    Abstract: A wide band antenna for interfacing an electronic device with a plurality of radio access technologies is provided. The antenna includes a first resonator and a second resonator. Both the first resonator and the second resonator are attached to an antenna feed structure. The length of the first resonator provides one mode of operation of the antenna, and the length of the second resonator provides a second mode of operation of the antenna. And a third mode of operation of the antenna is provided by mutual coupling and current flow between both the first resonator and the second resonator.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: June 20, 2017
    Assignee: Wistron Corporation
    Inventor: Mohammed Ziaul Azad
  • Patent number: 9620849
    Abstract: A device having a coupled-feed wideband antenna is provided. The device comprises: a chassis comprising as a ground plane; an antenna feed, a ground side of the antenna feed connected to the ground plane; and, an antenna comprising: a first radiating arm configured for generating a first resonance at a first frequency, the first radiating arm connected to the chassis and hence the ground plane; a second radiating arm configured for generating a second resonance at a second frequency higher than the first frequency, the second radiating arm connected to the ground plane; and a third radiating arm configured for generating a third resonance at a third frequency higher than the second frequency, the first radiating arm capacitively coupled to the third radiating arm, and the third radiating arm connected to a positive side of the antenna feed.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: April 11, 2017
    Assignee: BlackBerry Limited
    Inventors: Mohammed Ziaul Azad, Steven Eugene Downs, Zhong Ji, David Fisk, Seong Heon Jeong
  • Patent number: 9437926
    Abstract: A broadband antenna for interfacing an electronic device with a plurality of radio access technologies is provided. The antenna includes an excitation element and a parasitic element. The excitation element includes a feed line with a first distal end and a second distal end with first and second arms extending from the second distal end, wherein one of the first or second arms is shorter than the other such that the excitation element forms an asymmetrical T shape. The length of the first and second arms determines at least two modes of operation of the antenna. The parasitic element wraps around the asymmetrical T shape and includes a length configured to provide another mode of operation of the antenna.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: September 6, 2016
    Assignee: Wistron Corporation
    Inventors: Mohammed Ziaul Azad, Firass Badaruzzaman, Hou-Chun Huang
  • Publication number: 20160164183
    Abstract: A wide band antenna for interfacing an electronic device with a plurality of radio access technologies is provided. The antenna includes a first resonator and a second resonator. Both the first resonator and the second resonator are attached to an antenna feed structure. The length of the first resonator provides one mode of operation of the antenna, and the length of the second resonator provides a second mode of operation of the antenna. And a third mode of operation of the antenna is provided by mutual coupling and current flow between both the first resonator and the second resonator.
    Type: Application
    Filed: December 4, 2014
    Publication date: June 9, 2016
    Inventor: Mohammed Ziaul Azad
  • Publication number: 20160156102
    Abstract: A broadband antenna for interfacing an electronic device with a plurality of radio access technologies is provided. The antenna includes an excitation element and a parasitic element. The excitation element includes a feed line with a first distal end and a second distal end with first and second arms extending from the second distal end, wherein one of the first or second arms is shorter than the other such that the excitation element forms an asymmetrical T shape. The length of the first and second arms determines at least two modes of operation of the antenna. The parasitic element wraps around the asymmetrical T shape and includes a length configured to provide another mode of operation of the antenna.
    Type: Application
    Filed: December 1, 2014
    Publication date: June 2, 2016
    Inventors: Mohammed Ziaul Azad, Firass Badaruzzaman, Hou-Chun Huang
  • Publication number: 20140354483
    Abstract: A device having a coupled-feed wideband antenna is provided. The device comprises: a chassis comprising as a ground plane; an antenna feed, a ground side of the antenna feed connected to the ground plane; and, an antenna comprising: a first radiating arm configured for generating a first resonance at a first frequency, the first radiating arm connected to the chassis and hence the ground plane; a second radiating arm configured for generating a second resonance at a second frequency higher than the first frequency, the second radiating arm connected to the ground plane; and a third radiating arm configured for generating a third resonance at a third frequency higher than the second frequency, the first radiating arm capacitively coupled to the third radiating arm, and the third radiating arm connected to a positive side of the antenna feed.
    Type: Application
    Filed: June 3, 2013
    Publication date: December 4, 2014
    Inventors: Mohammed Ziaul AZAD, Steven Eugene DOWNS, Zhong JI, David FISK, Seong Heon JEONG