Patents Assigned to Fujikura Ltd.
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Publication number: 20240250405Abstract: A wireless module includes a first board having an antenna, the antenna transmitting and receiving a high frequency signal in a millimeter wave band, a second board handling a baseband signal with a lower frequency than the high frequency signal, and a housing including a cover and a case combined with each other and accommodating the first board and the second board, in which a passage portion that allows electromagnetic waves transmitted and received by the antenna to pass through is provided in the cover, and the first board is fixed to the cover while being in contact with the cover.Type: ApplicationFiled: January 12, 2024Publication date: July 25, 2024Applicant: Fujikura Ltd.Inventors: Noriaki Shigematsu, Masao Mori, Kiyoshi Kobayashi, Yuki Suto
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Publication number: 20240250052Abstract: A semiconductor package includes an RFIC chip, a mold resin that surrounds the RFIC chip in a planar view, a plurality of solder bumps, and a plurality of redistributors that connect the RFIC chip to the plurality of solder bumps, wherein a first bump group disposed in a position that overlaps with the RFIC chip in the planar view, and a second bump group disposed in a position that overlaps with the mold resin in the planar view are included in the plurality of solder bumps, in the second bump group, at least a high frequency bump connected to a high frequency terminal of the RFIC chip, and a GND bump connected to a GND terminal of the RFIC chip are included, and a minimum pitch in the second bump group is larger than a minimum pitch in the first bump group.Type: ApplicationFiled: August 8, 2022Publication date: July 25, 2024Applicant: Fujikura Ltd.Inventor: Michikazu Tomita
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Publication number: 20240248270Abstract: An optical fiber cable includes optical fibers, a wrapping tube that wraps around the optical fibers and contacts outermost ones of the optical fibers, and a sheath that covers the wrapping tube and has recesses on an inner circumferential surface of the sheath. The recesses are recessed toward a radially outer side of the optical fiber cable such that a space exists between the wrapping tube and the sheath in each of the recesses.Type: ApplicationFiled: April 20, 2022Publication date: July 25, 2024Applicant: Fujikura Ltd.Inventors: Okimi Mukai, Ken Osato, Akira Namazue
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Patent number: 12044885Abstract: A jig for a fusion splicer mountable on a heater of the fusion splicer includes: a plate part configured to face a heating part of the heater; a first retainer, configured to face a first clamp of the fusion splicer that is disposed outside of the heating part along a longitudinal direction of an object to be heated, and further configured to retain a first member extending from a first end of the object along the longitudinal direction; and a second retainer, configured to face a second clamp disposed on a side of the heating part opposite to the first clamp along the longitudinal direction, and further configured to retain a second member extending from a second end of the object along the longitudinal direction.Type: GrantFiled: May 18, 2020Date of Patent: July 23, 2024Assignee: Fujikura Ltd.Inventors: Keisuke Nishiguchi, Ririka Seino
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Publication number: 20240241336Abstract: A manufacturing method for manufacturing an optical fiber ribbon, the manufacturing method includes intermittently forming, with a connecting device, connection parts between optical fibers measuring a load of the connecting device during the intermittent forming of the connection parts, and detecting an abnormality based on the load.Type: ApplicationFiled: February 28, 2022Publication date: July 18, 2024Applicant: FUJIKURA LTD.Inventors: Hironori Sato, Hiroyuki Takahashi, Itaru Ishida, Ken Osato
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Patent number: 12040765Abstract: A digital phase shifter includes: a plurality of digital phase shift circuits connected in a cascade manner, wherein each of the plurality of digital phase shift circuits includes a signal line, two inner lines provided on two sides of the signal line, two outer lines provided on outer sides of the inner lines, a first grounding conductor connected to one end of each of the inner lines and the outer lines, a second grounding conductor connected to other ends of the outer lines, and two electronic switches provided between other ends of the inner lines and the second grounding conductor, and is set to a low-delay mode in which return currents flow in the inner lines or a high-delay mode in which return currents flow in the outer lines, and wherein the digital phase shifter includes: a phase shift quantity moderator that moderates unevenness of a phase shift quantity of an uneven digital phase shift circuit of the plurality of digital phase shift circuits, of which the phase shift quantity is uneven with respecType: GrantFiled: August 5, 2022Date of Patent: July 16, 2024Assignee: FUJIKURA LTD.Inventor: Yusuke Uemichi
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Publication number: 20240231029Abstract: An optical fiber ribbon includes: optical fibers disposed side by side in a predetermined direction; and connecting portions that connect two adjacent ones of the optical fibers. A peripheral resin portion is formed on a periphery of the optical fibers. An arithmetic mean roughness Ra of a surface of the peripheral resin portion is 0.41 ?m or lower. A ten-point mean roughness Rz of a surface of the peripheral resin portion is 1.4 ?m or lower.Type: ApplicationFiled: December 27, 2023Publication date: July 11, 2024Applicant: Fujikura Ltd.Inventors: Yoshie Murakoshi, Akira Namazue, Ken Osato
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Publication number: 20240236513Abstract: An imaging device includes: an optical computing section that receives a first optical signal and generates a second optical signal including a feature amount extracted from the first optical signal; an image sensor that converts the second optical signal into a first electric signal including a piece of image information; and a computer that receives the first electric signal and generates second electric signals using machine learning models, each of the second electric signals corresponding to a respective one of the machine learning models, wherein: each of the second electric signals, generated from the first electric signal including the same piece of image information, includes different image information.Type: ApplicationFiled: January 18, 2022Publication date: July 11, 2024Applicant: Fujikura Ltd.Inventors: Hiroyuki Kusaka, Masahiro Kashiwagi, Yuichiro Kunai
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Publication number: 20240228359Abstract: An optical fiber manufacturing method includes supplying power to a drawing furnace to cause T/V to decrease to Ttarget/Vtarget along a quadratic function having a value of the Ttarget/Vtarget at an apex with lapse of time, where T is a tension applied to an optical fiber when an optical fiber preform is heated by the drawing furnace and the optical fiber is drawn, V is speed of withdrawing the optical fiber when the optical fiber is heated by the drawing furnace and the optical fiber is drawn, Ttarget is a target value of the tension, and Vtarget is a target value of the speed.Type: ApplicationFiled: March 31, 2022Publication date: July 11, 2024Applicant: Fujikura Ltd.Inventor: Tomoyasu Honda
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Patent number: 12032207Abstract: A fusion splicer includes: a heater that heats a glass of an optical fiber; a pair of clamps that clamp a coated part of the optical fiber, wherein the pair of clamps is constituted by: a lower clamp on which a coated part of the optical fiber is disposed; and a coated part clamp that presses the coated part of the optical fiber against the lower clamp; a windproof cover that covers the heater and the coated part clamp; a retreat mechanism that causes the coated part clamp to retreat from the lower clamp; an opening/closing mechanism that opens and closes the windproof cover; and a pair of glass clamps attached to an inner surface of the windproof cover.Type: GrantFiled: October 22, 2020Date of Patent: July 9, 2024Assignee: Fujikura Ltd.Inventors: Ryo Hasegawa, Koichi Yokota, Noriyuki Kawanishi
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Patent number: 12030808Abstract: A method for manufacturing an optical fiber, the method includes: exposing a bare fiber formed of glass and having a temperature of 500° C. to 1,500° C. to a gas in which a moisture content is controlled to 2 to 20 g/m3; applying an uncured resin to an outer periphery of the bare fiber; and curing the resin to form a coating layer.Type: GrantFiled: January 27, 2021Date of Patent: July 9, 2024Assignee: Fujikura Ltd.Inventors: Kenji Yamashiro, Miryo Kashiwazaki
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Publication number: 20240219665Abstract: A fixing structure includes: an optical fiber group constituted by a plurality of optical fibers; a tubular member through which the optical fiber group is passed; a reticulated tube, one end part of the reticulated tube being disposed on an outer periphery of the tubular member, the optical fiber group being inserted through an extended section of the reticulated tube extending out from the tubular member; and a fixing member that fixes the tubular member which has the reticulated tube disposed on the outer periphery thereof.Type: ApplicationFiled: January 29, 2024Publication date: July 4, 2024Applicant: FUJIKURA LTD.Inventors: Go Taki, Masayuki Ishioka, Mizuki Isaji, Tomoaki Kaji, Soichiro Kaneko, Koji Tomikawa, Akira Namazue, Ken Osato
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Publication number: 20240222829Abstract: A digital phase shifter of the present invention is a digital phase shifter in which digital phase shift circuits are cascade-connected, each of the digital phase shift circuits including a signal line, a pair of inner lines provided on both sides of the signal line, a pair of outer lines provided on outer sides of the inner lines, a first ground conductor connected to one ends of the inner lines and one ends of the outer lines, a second ground conductor connected to the other ends of the outer lines, and a pair of electronic switches provided between the other ends of the inner lines and the second ground conductor. The digital phase shift circuits include a multi-row structure constituted by a front row and a rear row, the front row and the rear row are adjacent to each other, and the ground pattern is connected to the front row at one point.Type: ApplicationFiled: August 8, 2022Publication date: July 4, 2024Applicant: Fujikura Ltd.Inventor: Yusuke Uemichi
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Publication number: 20240222837Abstract: A splitter-combiner includes a first quarter-wave line, a second quarter-wave line, an absorption resistance, a combining terminal, and a line bending circuit. The line bending circuit includes a line parallel region and a line bending region. The line parallel region has the first quarter-wave line and the second quarter-wave line. The first quarter-wave line and the second quarter-wave line are parallel to each other in the line parallel region. The line bending region has the first quarter-wave line and the second quarter-wave line. The first quarter-wave line and the second quarter-wave line are bent in the same direction as each other in the line bending region.Type: ApplicationFiled: February 9, 2022Publication date: July 4, 2024Applicants: Fujikura Ltd., International Business Machines CorporationInventors: Yusuke Uemichi, Bodhisatwa Sadhu, Jean-Olivier Plouchart
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Publication number: 20240222830Abstract: A connecting portion includes a first connection line configured to connect a signal line of a first digital phase shift circuit and a signal line of a second digital phase shift circuit, second connection lines configured to connect inner lines of the first digital phase shift circuit and inner lines of the second digital phase shift circuit, ground layers disposed above and below the first connection line and the second connection lines, and first via holes configured to connect at least the second connection lines and the ground layers.Type: ApplicationFiled: August 8, 2022Publication date: July 4, 2024Applicant: Fujikura Ltd.Inventor: Yusuke Uemichi
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Patent number: 12025844Abstract: A cable includes: a cable main body; a first adhesive layer in contact with an outer peripheral surface of the cable main body; a protective member that covers an end part of the cable main body; an outer peripheral member that covers a part of the protective member; and a second adhesive layer on an inner peripheral surface of the outer peripheral member and in contact with the protective member. Adhesive strength of the second adhesive layer is larger than adhesive strength of the first adhesive layer.Type: GrantFiled: March 4, 2021Date of Patent: July 2, 2024Assignee: Fujikura Ltd.Inventors: Ryoichi Mitobe, Shuhei Kanno
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Patent number: 12021288Abstract: A filter circuit (1) includes a first transmission line (11), a second transmission line (12) which has an electrical length set to ½ of an electrical length of the first transmission line, a first capacitor (21), a second capacitor (22), and a third capacitor (23). Capacitances of the first capacitor, the second capacitor, and the third capacitor are set in such a manner that a circuit including the first transmission line, the second transmission line, and the first capacitor resonates in series at a predetermined fundamental frequency, a circuit including the first transmission line, the first capacitor, and the second capacitor resonates in parallel at a third harmonic frequency being a tripled frequency of the fundamental frequency, and a circuit including the second transmission line and the third capacitor resonates in series at the third harmonic frequency.Type: GrantFiled: December 17, 2020Date of Patent: June 25, 2024Assignee: FUJIKURA LTD.Inventor: Yo Yamaguchi
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Publication number: 20240200888Abstract: A cold plate includes a housing, which in turn includes a metal base plate and a resin cover. The metal base plate includes: a base part; and a heat exchange part that transfers heat absorbed from a heating element to a refrigerant. The resin cover includes an outer wall part joined to the base part. The housing has: an internal space, surrounded by the base part and the outer wall part, in which the heat exchange part is disposed; an inflow hole that communicates with the internal space and into which the refrigerant flows; and an outflow hole that communicates with the internal space and through which the refrigerant flows out.Type: ApplicationFiled: December 13, 2023Publication date: June 20, 2024Applicant: Fujikura Ltd.Inventors: Masahiro Matsuda, Yoji Kawahara
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Patent number: 12015387Abstract: A digital phase shifter includes a plurality of digital phase shift circuit groups in which a plurality of digital phase shift circuits are connected in cascade and one or more bend-type connection units connected between two digital phase shift circuit groups. At least one of the digital phase shift circuits constituting at least one digital phase circuit group is a mitigation circuit that mitigates a distribution of phase shift amounts.Type: GrantFiled: January 26, 2023Date of Patent: June 18, 2024Assignee: FUJIKURA LTD.Inventor: Yusuke Uemichi
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Patent number: 12013575Abstract: An optical connector includes: an optical fiber; a ferrule with an insertion hole that accommodates the optical fiber; a housing that accommodates the ferrule and that includes two lock holes formed therein; two springs that sandwich the optical fiber therebetween, and that bias the ferrule in a forward direction of the optical connector; and a support portion that supports the two springs from a rear direction of the optical connector. The support portion includes a first divided member that is combined with a second divided member and two latch portions locked in the two lock holes. When the insertion hole extends is the front and the rear directions, the two springs are disposed along left and right directions of the optical connector, and a vertical direction is orthogonal to the front, rear, right, and left directions, the two latch portions are disposed side by side in the vertical direction.Type: GrantFiled: August 5, 2020Date of Patent: June 18, 2024Assignee: Fujikura Ltd.Inventors: Tomoyuki Shinoda, Shuhei Kanno, Takahito Otomitsu