Patents by Inventor Takahiro Sugiyama

Takahiro Sugiyama 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).

  • Differential signaling cable, transmission cable assembly using same, and production method for differential signaling cable
    Patent number: 9660318
    Abstract: A differential signaling cable includes a pair of signal conductors provided in parallel, longitudinally within the differential signaling cable, an insulator covering a periphery of the pair of signal conductors as a whole, wherein only the insulator is between the pair of signal conductors, and a shield conductor provided on an outer periphery of the insulator. An interval between the pair of signal conductors is set so that an even-mode impedance of the pair of signal conductors having the interval fixed by embedment within the insulator and covered by the shield conductor, is in a range from 1.5 to 1.9 times an odd-mode impedance for improved skew and differential mode insertion loss experienced during a transmission of high-speed signals of at least 10 Gbps.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: May 23, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Takahiro Sugiyama, Hideki Nounen, Takashi Kumakura, Yosuke Ishimatsu
  • Cable with connector
    Patent number: 9595792
    Abstract: A cable with connector includes a cable including at least two or more differential signal transmission cables for transmitting/receiving differential signals, a connector at both ends of the cable and including a built-in paddle card to electrically connect the differential signal transmission cables to a connected device. The paddle card includes a sending-side transmission path that is formed on the paddle card so as to transmit electrical signals input from the device to the differential signal transmission cables. The sending-side transmission path includes a common-mode reflecting transmission path that is in a common-mode impedance mismatched to a transmission path of the device so as to reflect common-mode signals input from the transmission path of the device.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: March 14, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Kei Nishimura, Izumi Fukasaku, Takahiro Sugiyama
  • Semiconductor laser element
    Patent number: 9583914
    Abstract: A semiconductor laser element is realized with high beam quality (index M2<1). A diffraction grating 6ba of a diffraction grating layer 6 extends along a principal surface 2a and is provided on a p-side surface 6a of the diffraction grating layer 6; the refractive index of the diffraction grating layer 6 periodically varies in directions extending along the principal surface 2a, in the diffraction grating 6ba; the diffraction grating 6ba has a plurality of holes 6b; the plurality of holes 6b are provided in the p-side surface 6a and arranged in translational symmetry along a square lattice R3; the plurality of holes 6b each have the same size and shape; each hole 6b corresponds to a lattice point of the diffraction grating 6ba and is of a triangular prism shape; a shape of a bottom face 6c of the hole 6b is an approximate right triangle.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: February 28, 2017
    Assignees: Kyoto University, HAMAMATSU PHOTONICS K.K.
    Inventors: Kazuyoshi Hirose, Akiyoshi Watanabe, Yoshitaka Kurosaka, Takahiro Sugiyama, Susumu Noda
  • Multipair differential signal transmission cable
    Patent number: 9583235
    Abstract: A multipair differential signal transmission cable includes a plurality of differential signal transmission cables being bundled and each including two signal conductors as a differential pair covered with an insulation and a first shielding tape conductor provided therearound. The first shielding tape conductor is longitudinally lapped so as to have an overlapping portion in a cable longitudinal direction. The plurality of differential signal transmission cables include at least one or more pairs of two adjacent differential signal transmission cables. The two adjacent differential signal transmission cables are arranged such that the overlapping portion of one of the two adjacent differential signal transmission cables does not face the other of the two adjacent differential signal transmission cables.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: February 28, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Hideki Nonen, Takahiro Sugiyama
  • Multipair cable
    Patent number: 9548143
    Abstract: A multipair cable includes an inner layer part including two differential signal transmission cables for an inner layer that are twisted together, a press winding tape wound around a periphery of the inner layer part, and an outer layer part including a plurality of differential signal transmission cables for an outer layer that are wound around an outer periphery of the press winding tape. The inner layer part further includes a buffer tape disposed between the two differential signal transmission cables.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: January 17, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Takahiro Sugiyama, Hideki Nonen, Osamu Seya
  • SEMICONDUCTOR LASER MODULE
    Publication number: 20170012407
    Abstract: A surface emitting laser element capable of emitting a main beam and a sub-beam, and a monitoring light detection element capable of detecting a light intensity of the sub-beam are included, the surface emitting laser element is a PCSEL, the main beam and the sub-beam are emitted in an upward direction of the surface emitting laser element and are inclined to each other at a predetermined angle, and respective changes in a peak light intensity of the main beam and a peak light intensity of the sub-beam with respect to a value of a driving current of the surface emitting laser element are correlated with each other. Therefore, if an output of the monitoring light detection element indicating the peak light intensity of the sub-beam is used, the peak light intensity of the main beam can be estimated.
    Type: Application
    Filed: November 10, 2014
    Publication date: January 12, 2017
    Inventors: Akiyoshi WATANABE, Yoshitaka KUROSAKA, Kazuyoshi HIROSE, Takahiro SUGIYAMA, Susumu NODA
  • HIGH-SPEED TRANSMISSION CABLE AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20160372235
    Abstract: A high-speed transmission cable includes two parallel signal lines for transmitting a differential signal, an insulation collectively covering the two signal lines, a shield conductor covering the insulation, and a ground connecting drain wire. The drain wire is arranged so that a portion of the outer circumference thereof covered with the insulation is held by the insulation, another portion of the outer circumference not covered with the insulation protrudes outward from the insulation and the protruding portion is electrically in contact with the shield conductor.
    Type: Application
    Filed: June 8, 2016
    Publication date: December 22, 2016
    Inventors: Takahiro SUGIYAMA, Hideyuki SUZUKI
  • Clip
    Patent number: 9488202
    Abstract: A clip having a main clip body that is made of resin and has a shape in front view that is closed at one end and open at the other end. The main clip body has engaging arms and holding members positioned to the inside of the engaging arms. The engaging arms are configured so as to be elastically deformed when the main clip body passes through an installing hole of a partner panel and to engage with a rim of the hole when the engaging arms have been inserted. The holding members are configured so as to keep the main clip body fitted onto the clip seat of the mounted member. The engaging arms and the holding members are connected to assume a substantially diamond-shaped loop in front view, and are configured so that the positions thereof differ in side view, and overlap in front view, when elastically deformed.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: November 8, 2016
    Assignee: DAIWA KASEI KOGYO KABUSHIKI KAISHA
    Inventors: Jun Komeno, Takahiro Sugiyama, Toshio Iwahara
  • Differential signal transmission cable
    Patent number: 9484127
    Abstract: A differential signal transmission cable includes a pair of conductors arranged to be distant from each other and parallel to each other, an insulator covering the pair of conductors, the insulator having a transversal cross section including a width in a minor axis direction and a width in a major axis direction greater than the width in the minor axis direction, and an outer periphery shape having curved lines, and a shield conductor wound around the insulator, the shield conductor including a seam or an overlapping region along a longitudinal direction of the insulator.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: November 1, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Takahiro Sugiyama, Hideki Nonen, Takashi Kumakura
  • Noise suppression cable
    Patent number: 9484128
    Abstract: A noise suppression cable includes an insulated wire, an internal magnetic tape layer including a resin layer and a magnetic material layer formed on one surface of the resin layer, the internal magnetic tape layer being spirally wound on a periphery of the insulated wire in a first direction along a longitudinal direction of the cable so as to allow the magnetic material layer of the internal magnetic tape layer to face outside, and an external magnetic tape layer including a resin layer and a magnetic material layer formed on one surface of the resin layer, the external magnetic tape layer being spirally wound on a periphery of the internal magnetic tape layer in a second direction different from the first direction along the longitudinal direction of the cable so as to allow the magnetic material layer of the external magnetic tape layer to face inside.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: November 1, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshinori Sunaga, Takahiro Sugiyama, Naofumi Chiwata
  • DIFFERENTIAL SIGNAL TRANSMISSION CABLE AND MULTI-CORE DIFFERENTIAL SIGNAL TRANSMISSION CABLE
    Publication number: 20160300642
    Abstract: A differential signal transmission cable includes an insulated wire section including a pair of signal line conductors extending parallel to each other for transmitting a differential signal and an insulation covering the pair of signal line conductors, and a shield conductor including a band-shaped metal foil and spirally wound around the insulate wire section so as to overlap at a portion in a width direction thereof. An allowable elongation of the shield conductor as a stretchable limit in a longitudinal direction without breaking is not less than 2% at normal temperature.
    Type: Application
    Filed: April 5, 2016
    Publication date: October 13, 2016
    Inventors: Sohei KODAMA, Takahiro SUGIYAMA
  • Manufacturing device and manufacturing method of differential signal transmission cable
    Patent number: 9466408
    Abstract: To provide a differential signal transmission cable in which there is no gap between an insulated wire and a shield tape, a manufacturing device thereof is a manufacturing device of a differential signal transmission cable including: a first retention tape spirally wound around an insulated wire in which a pair of signal line conductors is coated by an insulator; and a second retention tape spirally wound around the first retention tape. This manufacturing device includes a winding head that winds the first retention tape and the second retention tape around the insulated wire in the same direction, the insulated wire which moves along a longitudinal direction; and a twist preventing jig that is disposed ahead of the winding head in a movement direction of the insulated wire and prevents the insulated wire from being twisted.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: October 11, 2016
    Assignee: Hitachi Metals, Ltd.
    Inventor: Takahiro Sugiyama
  • DEVICE AND METHOD FOR DECIDING CHARACTERISTICS OF DIFFERENTIAL SIGNAL CABLE
    Publication number: 20160218771
    Abstract: A device for deciding characteristics of a differential signal cable at a transmission rate of not less than 10 G baud includes a selector switch that changes a transmission rate or an output power of a test signal to be supplied to the differential signal cable, a signal transmitting circuit that generates a test signal at a different transmission rate or output power as one of the predetermined number of plurality of test signals according to the change of state of the selector switches and sends the generated test signal to the differential signal cable via one connector, and a signal receiving circuit that receives the test signal transmitted through the differential signal cable via the other connector and decides the success or failure of transmission of the test signal through the differential signal cable based on the received test signal and pre-stored data of the plurality of test signals.
    Type: Application
    Filed: January 13, 2016
    Publication date: July 28, 2016
    Inventors: Hiroshi ISHIKAWA, Takahiro SUGIYAMA, Izumi FUKASAKU
  • Differential signal transmission cable
    Patent number: 9384873
    Abstract: In a differential signal transmission cable, a surface of a skin layer is partially provided with shield conductors disposed at respective equidistant portions spaced apart in a direction orthogonal to a direction in which two signal conductors are arranged, the equidistant portions each being distant by the same distance from axial centers of the signal conductors. On the surface of the skin layer, the shield conductors are not provided in areas located in the direction in which the signal conductors are arranged, and spaces are created in these areas.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: July 5, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Hidenori Yonezawa, Takahiro Sugiyama, Hideki Nonen, Izumi Fukasaku
  • Termination structure, termination method and termination terminal for high-speed transmission line
    Patent number: 9362632
    Abstract: A termination structure for high-speed transmission line includes a high-speed transmission line including a signal line configured to transmit a signal, an insulation which covers the signal line and an external conductor disposed at an outer periphery of the insulation, and a termination terminal disposed at a terminal of the high-speed transmission line. The termination terminal includes a holder disposed sandwiching the external conductor exposed at the terminal of the high-speed transmission line from both sides. The holder includes a holding part to hold the high-speed transmission line and is electrically connected to the external conductor. The holding part is formed so as to have a shape along an outer shape of the external conductor.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: June 7, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshinori Sunaga, Hideki Nonen, Takahiro Sugiyama, Osamu Seya
  • Multi-pair differential signal transmission cable
    Patent number: 9349508
    Abstract: A pair of second intervening members configured to hold a transverse cross-section of a first intervening member in a circular shape is disposed inside the first intervening member together with a first cable assembly. An overlap portion of each of differential signal transmission cables that form the first cable assembly and a second cable assembly is oriented toward a second shielding tape conductor.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: May 24, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Hideki Nonen, Takahiro Sugiyama
  • Differential transmission cable and multipair differential transmission cable
    Patent number: 9324479
    Abstract: A differential transmission cable includes a pair of inner conductors; an insulator that separately or integrally covers the pair of inner conductors; an outer conductor disposed around the insulator; a wrapping tape wound around the outer conductor; and a drain wire disposed outside of the wrapping tape, the drain wire being electrically connected to the outer conductor for grounding the outer conductor.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: April 26, 2016
    Assignee: HITACHI METALS, LTD.
    Inventor: Takahiro Sugiyama
  • Differential signal cable and production method therefor
    Patent number: 9299481
    Abstract: A differential signal cable is composed of two inner conductors, an insulator, which covers the two inner conductors separately or together, and an outer conductor, which covers a circumference of the insulator. When measured in a cable length of 1 m, an effective capacitance difference ?X represented by Formula (1) below is not greater than 0.2 percent of an average value C of capacitances of the two inner conductors, ?X=?C+?L/Z02??(1), where ?C is a difference in capacitance between the two inner conductors, ?L is a difference in inductance between the two inner conductors, and Z0 is a reference impedance (50 ohms).
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: March 29, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Hiroshi Ishikawa, Takahiro Sugiyama, Izumi Fukasaku, Hidenori Yonezawa, Masafumi Kaga
  • DIFFERENTIAL SIGNALING CABLE, TRANSMISSION CABLE ASSEMBLY USING SAME, AND PRODUCTION METHOD FOR DIFFERENTIAL SIGNALING CABLE
    Publication number: 20160036112
    Abstract: A differential signaling cable includes a pair of signal conductors provided in parallel, longitudinally within the differential signaling cable, an insulator covering a periphery of the pair of signal conductors as a whole, wherein only the insulator is between the pair of signal conductors, and a shield conductor provided on an outer periphery of the insulator. An interval between the pair of signal conductors is set so that an even-mode impedance of the pair of signal conductors having the interval fixed by embedment within the insulator and covered by the shield conductor, is in a range from 1.5 to 1.9 times an odd-mode impedance for improved skew and differential mode insertion loss experienced during a transmission of high-speed signals of at least 10 Gbps.
    Type: Application
    Filed: July 6, 2015
    Publication date: February 4, 2016
    Inventors: Takahiro SUGIYAMA, Hideki NOUNEN, Takashi KUMAKURA, Yosuke ISHIMATSU
  • LASER DEVICE
    Publication number: 20160020576
    Abstract: In a laser device, a different refractive index region 6B of a photonic crystal layer is arranged at a lattice point position of a square lattice. In the case where a plane shape of the different refractive index regions 6B is a nearly isosceles right triangle, two sides forming a right angle extend along longitudinal and horizontal lateral lines of the square lattice. A direction parallel to or vertical to an oblique side of the triangle and a direction of polarization in the periodic polarization inversion structure of a nonlinear optical crystal NL are the same.
    Type: Application
    Filed: March 7, 2014
    Publication date: January 21, 2016
    Inventors: Akiyoshi WATANABE, Kazuyoshi HIROSE, Yoshitaka KUROSAKA, Takahiro SUGIYAMA, Susumu NODA