Patents by Inventor Kei Katou

Kei Katou 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: 11109480
    Abstract: A transmission line has a signal electrode formed on one surface of a flexible printed circuit, and a ground electrode formed on the other surface of the flexible printed circuit. A connection terminal has signal terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through a via hole, and ground terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through the via hole. The signal terminal on the surface, on which the ground electrode is formed, is formed such that at least a width in an end portion on the transmission line side is narrower than a width of a part of the signal terminal on the surface, on which the signal electrode is formed, to be at the same position when the flexible printed circuit is seen in a plan view.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: August 31, 2021
    Assignee: Sumitomo Osaka Cement Co., Ltd
    Inventors: Norikazu Miyazaki, Kei Katou, Toshio Kataoka
  • Patent number: 11022763
    Abstract: An optical module in which an optical element is housed in a housing includes: an optical window member through which input light to the optical element or output light from the optical element passes and which hermetically seals inside of the housing; and a holding member that holds the optical window member. The optical window member is fixed to the housing by the holding member. A difference between linear expansion coefficients of the holding member and the optical window member is smaller than a difference between linear expansion coefficients of the housing and the optical window member. A position where the optical window member is attached on the holding member protrudes to an optical element side from a position where the holding member itself is fixed.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: June 1, 2021
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Tokutaka Hara, Kei Katou
  • Patent number: 10671717
    Abstract: A communication device includes: a first subscriber identification unit that stores first subscriber identification unit identification information associated with user identification information; and a communication unit that communicates with another communication device, the other communication device including a second subscriber identification unit that stores second subscriber identification unit identification information associated with user identification information.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: June 2, 2020
    Assignee: KDDI CORPORATION
    Inventors: Keisuke Takemori, Takamasa Isohara, Yoshiyuki Shibata, Kei Katou, Teruaki Honma
  • Patent number: 10558064
    Abstract: An optical communication module includes: an optical modulator that includes an optical modulation element housed in a rectangular parallelepiped container; a driver circuit that inputs a high-frequency signal to the optical modulation element; and a housing that houses the optical modulator and the driver circuit. An electrical interface is provided on one lateral surface of the housing, and an optical interface is provided on another lateral surface, which is opposite to the lateral surface, of the housing. In the optical modulator, an end of a wiring substrate, which is configured to introduce the high-frequency signal to the optical modulation element, is led out from one short-side side of the rectangular parallelepiped container, and the driver circuit is disposed between the short-side side of the optical modulator and the electrical interface.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: February 11, 2020
    Inventors: Norikazu Miyazaki, Kei Katou
  • Publication number: 20200033692
    Abstract: An optical waveguide device includes a substrate on which an optical waveguide is formed, and an object that is disposed on the substrate. The optical waveguide includes a mode conversion/branching portion that converts a mode of a light wave propagating through the optical waveguide and branches the light wave, and the object is disposed to cover a part or the whole of the mode conversion/branching portion or not to cover the mode conversion/branching portion when the substrate is viewed in a plan view. In a case where the object is disposed to cover a part of the mode conversion/branching portion, the object is disposed not to consecutively cover a section over a length of a predetermined value or higher in an advancing direction of a light wave.
    Type: Application
    Filed: July 23, 2019
    Publication date: January 30, 2020
    Inventors: Kei KATOU, Norikazu MIYAZAKI
  • Patent number: 10527874
    Abstract: An optical modulator is provided and includes a substrate that has an electro-optic effect, an optical waveguide that is formed on the substrate, a plurality of control electrodes that control a light wave propagated through the optical waveguide, and a plurality of light receiving elements that detect a light wave propagated through the optical waveguide. The optical modulator has two or more independent optical waveguide modulation portions. The light receiving elements are respectively provided in an upper part of the substrate with respect to the independent optical waveguide modulation portions. A wiring substrate is located above the substrate. A plurality of electric wirings are located on the wiring substrate. The plurality of electric wirings are disposed to extend in the vicinity of one side of the wiring substrate, are electrically connected to the light receiving elements, and output a signal detected by the light receiving elements to the outside.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: January 7, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Kei Katou
  • Patent number: 10502982
    Abstract: An optical modulator including an optical modulation element mounted inside a housing, in which at least a portion of an electric line is connected to an external circuit board through a flexible printed circuit, and which is disposed on the external circuit board. A recess portion that mounts the flexible printed circuit is formed on an outer bottom surface of the housing and at a part where the flexible printed circuit is connected, and a device for preventing a resonance mode is provided such that a resonance mode of a microwave and a millimeter wave or a parallel plate mode is prevented from being generated among a surface A of the recess portion facing the flexible printed circuit, an electric wiring part B provided on the flexible printed circuit overlapping the surface A when seen in a plan view, an electric wiring part C provided on the external circuit board overlapping the surface A when seen in a plan view.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: December 10, 2019
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Kei Katou, Toshio Kataoka, Junichiro Ichikawa
  • Publication number: 20190302378
    Abstract: An optical module in which an optical element is housed in a housing includes: an optical window member through which input light to the optical element or output light from the optical element passes and which hermetically seals inside of the housing; and a holding member that holds the optical window member. The optical window member is fixed to the housing by the holding member. A difference between linear expansion coefficients of the holding member and the optical window member is smaller than a difference between linear expansion coefficients of the housing and the optical window member. A position where the optical window member is attached on the holding member protrudes to an optical element side from a position where the holding member itself is fixed.
    Type: Application
    Filed: March 26, 2019
    Publication date: October 3, 2019
    Inventors: Tokutaka HARA, Kei KATOU
  • Publication number: 20190302471
    Abstract: A positioning member for positioning optical components includes a laminated body in which a plurality of thin metal plates is laminated. In the positioning member for positioning the optical components by an upper surface of a first plate forming the laminated body and a side surface of a second plate disposed above the first plate, a portion where two non-parallel side surfaces of the second plate for positioning the optical components cross each other includes a cutout portion including a crossing portion of the side surfaces.
    Type: Application
    Filed: March 26, 2019
    Publication date: October 3, 2019
    Inventors: Tokutaka HARA, Kei KATOU
  • Publication number: 20190258089
    Abstract: An optical modulator including an optical modulation element mounted inside a housing, in which at least a portion of an electric line is connected to an external circuit board through a flexible printed circuit, and which is disposed on the external circuit board. A recess portion that mounts the flexible printed circuit is formed on an outer bottom surface of the housing and at a part where the flexible printed circuit is connected, and a device for preventing a resonance mode is provided such that a resonance mode of a microwave and a millimeter wave or a parallel plate mode is prevented from being generated among a surface A of the recess portion facing the flexible printed circuit, an electric wiring part B provided on the flexible printed circuit overlapping the surface A when seen in a plan view, an electric wiring part C provided on the external circuit board overlapping the surface A when seen in a plan view.
    Type: Application
    Filed: April 29, 2019
    Publication date: August 22, 2019
    Inventors: Kei KATOU, Toshio KATAOKA, Junichiro ICHIKAWA
  • Publication number: 20190239352
    Abstract: A transmission line has a signal electrode formed on one surface of a flexible printed circuit, and a ground electrode formed on the other surface of the flexible printed circuit. A connection terminal has signal terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through a via hole, and ground terminals formed on both the surfaces of the flexible printed circuit and electrically connected to each other through the via hole. The signal terminal on the surface, on which the ground electrode is formed, is formed such that at least a width in an end portion on the transmission line side is narrower than a width of a part of the signal terminal on the surface, on which the signal electrode is formed, to be at the same position when the flexible printed circuit is seen in a plan view.
    Type: Application
    Filed: January 30, 2019
    Publication date: August 1, 2019
    Inventors: Norikazu MIYAZAKI, Kei KATOU, Toshio KATAOKA
  • Patent number: 10365506
    Abstract: Provided is an optical modulator in which a phenomenon of a resonance mode or the like is prevented from being generated in a recess portion of a housing that mounts a flexible printed circuit and of which broadband characteristics are improved. There is provided an optical modulator in which an optical modulation element is mounted inside a housing, in which at least a portion of an electric line is connected to an external circuit board 7 through a flexible printed circuit 6, and which is disposed on the external circuit board.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: July 30, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD
    Inventors: Kei Katou, Toshio Kataoka, Junichiro Ichikawa
  • Patent number: 10348007
    Abstract: There is provided an optical control element module including: an optical control element having an optical waveguide and a control electrode on a substrate and disposed in a housing; an electrical connection part which is electrically connected to the control electrode, extends along a direction intersecting a plane on which the control electrode of the substrate is disposed, and is disposed in the housing; and a wiring substrate which has an input signal line electrically connected to the electrical connection part, at least a part of which is disposed outside the housing, in which impedance of the electrical connection part is set to be smaller than impedance of the input signal line.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: July 9, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Toshio Kataoka, Kei Katou
  • Patent number: 10268057
    Abstract: An optical modulator includes: an optical modulation element which is accommodated in a housing and has a signal electrode; a lead pin for inputting a high-frequency signal; a relay substrate in which a conductor pattern which electrically connects the lead pin and the signal electrode is formed; and a conductive extension portion which extends along a length direction of the lead pin in a range which includes at least a position of a connection portion between the lead pin and the conductor pattern, in which the extension portion is electrically connected to the housing.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: April 23, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Kei Katou, Toru Sugamata
  • Publication number: 20190113778
    Abstract: An optical modulator is provided and includes a substrate that has an electro-optic effect, an optical waveguide that is formed on the substrate, a plurality of control electrodes that control a light wave propagated through the optical waveguide, and a plurality of light receiving elements that detect a light wave propagated through the optical waveguide. The optical modulator has two or more independent optical waveguide modulation portions. The light receiving elements are respectively provided in an upper part of the substrate with respect to the independent optical waveguide modulation portions. A wiring substrate is located above the substrate. A plurality of electric wirings are located on the wiring substrate. The plurality of electric wirings are disposed to extend in the vicinity of one side of the wiring substrate, are electrically connected to the light receiving elements, and output a signal detected by the light receiving elements to the outside.
    Type: Application
    Filed: April 3, 2017
    Publication date: April 18, 2019
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu MIYAZAKI, Kei KATOU
  • Publication number: 20190025612
    Abstract: Provided is an optical modulator in which a phenomenon of a resonance mode or the like is prevented from being generated in a recess portion of a housing that mounts a flexible printed circuit and of which broadband characteristics are improved. There is provided an optical modulator in which an optical modulation element is mounted inside a housing, in which at least a portion of an electric line is connected to an external circuit board 7 through a flexible printed circuit 6, and which is disposed on the external circuit board.
    Type: Application
    Filed: September 27, 2016
    Publication date: January 24, 2019
    Inventors: Kei KATOU, Toshio KATAOKA, Junichiro ICHIKAWA
  • Patent number: 10162201
    Abstract: Provided is an optical modulator in which low-voltage drive and a stable modulation characteristic are secured over a wide bandwidth.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: December 25, 2018
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toshio Kataoka, Youichi Hosokawa, Kei Katou
  • Publication number: 20180314813
    Abstract: A communication device includes: a first subscriber identification unit that stores first subscriber identification unit identification information associated with user identification information; and a communication unit that communicates with another communication device, the other communication device including a second subscriber identification unit that stores second subscriber identification unit identification information associated with user identification information.
    Type: Application
    Filed: October 19, 2016
    Publication date: November 1, 2018
    Applicant: KDDI CORPORATION
    Inventors: Keisuke TAKEMORI, Takamasa ISOHARA, Yoshiyuki SHIBATA, Kei KATOU, Teruaki HONMA
  • Publication number: 20180287274
    Abstract: There is provided an optical control element module including: an optical control element having an optical waveguide and a control electrode on a substrate and disposed in a housing; an electrical connection part which is electrically connected to the control electrode, extends along a direction intersecting a plane on which the control electrode of the substrate is disposed, and is disposed in the housing; and a wiring substrate which has an input signal line electrically connected to the electrical connection part, at least a part of which is disposed outside the housing, in which impedance of the electrical connection part is set to be smaller than impedance of the input signal line.
    Type: Application
    Filed: February 27, 2018
    Publication date: October 4, 2018
    Inventors: Toshio KATAOKA, Kei KATOU
  • Publication number: 20180288874
    Abstract: An optical device includes a connection pad, which is connected to a conductor pattern on the circuit substrate, at one edge. The connection pad includes one ground pad, and two or more signal pads between which the ground pad is interposed from its both sides. The ground pad includes a concave portion including an opening at the edge. The circuit substrate is provided with a metal columnar member in the conductor pattern to which the ground pad is connected. The conductor pattern and the connection pad are fixed to each other with solder in a state in which the columnar member is fitted into the concave portion. Solder, which gradually rises from the ground pattern to a lateral surface of the columnar member, is formed between the columnar member and the ground pattern that is formed in the flexible printed circuit.
    Type: Application
    Filed: March 19, 2018
    Publication date: October 4, 2018
    Inventors: Toshio KATAOKA, Kei KATOU