Patents by Inventor Chi-Back Ryu

Chi-Back Ryu 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: 10985472
    Abstract: The present invention provides a waveguide slot array antenna having an excitation slot arrangement radiating a signal corresponding to an operating frequency in a radiation plate, the waveguide slot array antenna comprising: a first auxiliary radiation plate installed on a main radiation plate and rotating a polarization plane of a signal radiated from the excitation slot arrangement of the main radiation plate; and a second auxiliary radiation plate installed on the first auxiliary radiation plate and distributing and radiating the signal, the polarization plane of which has been rotated in the first auxiliary radiation plate.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: April 20, 2021
    Assignee: KMW INC.
    Inventors: Young-Chan Moon, Chang-Seob Choi, Chi-Back Ryu, Yong-Won Seo
  • Publication number: 20200194902
    Abstract: The present invention provides a waveguide slot array antenna having an excitation slot arrangement radiating a signal corresponding to an operating frequency in a radiation plate, the waveguide slot array antenna comprising: a first auxiliary radiation plate installed on a main radiation plate and rotating a polarization plane of a signal radiated from the excitation slot arrangement of the main radiation plate; and a second auxiliary radiation plate installed on the first auxiliary radiation plate and distributing and radiating the signal, the polarization plane of which has been rotated in the first auxiliary radiation plate.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 18, 2020
    Applicant: KMW INC.
    Inventors: Young-Chan MOON, Chang-Seob CHOI, Chi-Back RYU, Yong-Won SEO
  • Patent number: 10622726
    Abstract: The present invention provides a waveguide slot array antenna having an excitation slot arrangement radiating a signal corresponding to an operating frequency in a radiation plate, the waveguide slot array antenna comprising: a first auxiliary radiation plate installed on a main radiation plate and rotating a polarization plane of a signal radiated from the excitation slot arrangement of the main radiation plate; and a second auxiliary radiation plate installed on the first auxiliary radiation plate and distributing and radiating the signal, the polarization plane of which has been rotated in the first auxiliary radiation plate.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: April 14, 2020
    Assignee: KMW INC.
    Inventors: Young-Chan Moon, Chang-Seob Choi, Chi-Back Ryu, Yong-Won Seo
  • Publication number: 20170244173
    Abstract: The present invention provides a waveguide slot array antenna having an excitation slot arrangement radiating a signal corresponding to an operating frequency in a radiation plate, the waveguide slot array antenna comprising: a first auxiliary radiation plate installed on a main radiation plate and rotating a polarization plane of a signal radiated from the excitation slot arrangement of the main radiation plate; and a second auxiliary radiation plate installed on the first auxiliary radiation plate and distributing and radiating the signal, the polarization plane of which has been rotated in the first auxiliary radiation plate.
    Type: Application
    Filed: May 10, 2017
    Publication date: August 24, 2017
    Inventors: Young-Chan MOON, Chang-Seob CHOI, Chi-Back RYU, Yong-Won SEO
  • Patent number: 9572196
    Abstract: A small-sized base station employed in a mobile communication system is disclosed. To this end, the small-sized base station in a mobile communication system, according to one embodiment of the present invention, is a base station device in a mobile communication system comprising: a case which has the shape of a polyhedron and is hollow inside; a housing accommodated inside the case and having the same polyhedron shape as the case; and at least one board which is positioned between the case and the housing.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: February 14, 2017
    Assignee: KMW INC.
    Inventors: Duk-Yong Kim, Young-Chan Moon, Myong-Sik Lee, Chang-Woo Yoo, Chi-Back Ryu
  • Publication number: 20150250022
    Abstract: A small-sized base station employed in a mobile communication system is disclosed. To this end, the small-sized base station in a mobile communication system, according to one embodiment of the present invention, is a base station device in a mobile communication system comprising: a case which has the shape of a polyhedron and is hollow inside; a housing accommodated inside the case and having the same polyhedron shape as the case; and at least one board which is positioned between the case and the housing.
    Type: Application
    Filed: May 15, 2015
    Publication date: September 3, 2015
    Inventors: Duk-Yong Kim, Young-Chan Moon, Myong-Sik Lee, Chang-Woo Yoo, Chi-Back Ryu
  • Publication number: 20150144321
    Abstract: The present invention is an apparatus for dissipating heat through a heat sink, the apparatus comprising: a heat transfer member having one end with a contact surface contacting a heating element arranged on a substrate and the other end with a contact surface contacting the heat sink, the heat transfer member transferring the heat generated from the heating element to the heat sink; an elastic member for providing elastic force for pushing the heat transfer member toward the heating element; a guide member arranged in the heat sink to form a contact surface contacting the heat transfer member, the guide member mechanically guiding the heat transfer member such that the heat transfer member may slide and move toward the heating element; and a spacing member inserted between the substrate and the heat sink so as to maintain a preset spacing when the substrate and the heat sink are fixed and attached with each other.
    Type: Application
    Filed: February 5, 2015
    Publication date: May 28, 2015
    Inventors: Duk Yong Kim, Chang-Woo Yoo, Chi-Back Ryu, Min-Sik Park
  • Publication number: 20150148111
    Abstract: The present invention is a closure apparatus of a wireless communication device having a heat-dissipating structure. The closure apparatus comprises: a first housing; and a second housing manufactured to be mechanically separated from the first housing and coupled to the first housing with preset spacing. The second housing includes equipment pre-selected based on the degree of heat dissipation from among multiple pieces of equipment of the communication device. The first housing includes equipment other than the equipment of the second housing.
    Type: Application
    Filed: February 5, 2015
    Publication date: May 28, 2015
    Inventors: Duk Yong Kim, Chang-Woo Yoo, Chi-Back Ryu, Min-Sik Park