Patents by Inventor Hidenori Yukawa
Hidenori Yukawa 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).
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Publication number: 20220407489Abstract: A high frequency filter includes: a multilayer substrate including a first substrate for which lands are provided, a second substrate for which lands are provided, and a third substrate for which lands are provided, the third substrate being sandwiched between the first substrate and the second substrate; a columnar conductor electrically connected to the lands in the multilayer substrate; and columnar conductors provided to surround the columnar conductor, electrically connected to a ground plane of the first substrate, and electrically connected to a ground plane of the second substrate. The spacing between the lands of the first substrate and the lands of the third substrate and the spacing between the lands of the second substrate and the lands of the third substrate are electrical lengths of 90 degrees or less at the cutoff frequency.Type: ApplicationFiled: August 3, 2022Publication date: December 22, 2022Applicant: Mitsubishi Electric CorporationInventors: Motomi WATANABE, Yukihiro HOMMA, Tomohiro TAKAHASHI, Shinji ARAI, Kenji HARAUCHI, Hidenori YUKAWA
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Publication number: 20220045412Abstract: A polarized waveguide filter is formed in which the polarized waveguide filter includes a first rectangular waveguide; a second rectangular waveguide; and a rectangular cavity resonator that has a first edge surface connected to an electromagnetic wave exit plane of the first rectangular waveguide via a coupling unit, and has a second edge surface facing the first edge surface and connected to an electromagnetic wave incident plane of the second rectangular waveguide via a coupling unit, and excites each of a TE10 mode and a TE20 mode of an electromagnetic wave, and the rectangular cavity resonator has two first wall surfaces and two second wall surfaces narrower in area than the first wall surfaces, and a protrusion that shifts a resonance frequency of the TE10 mode and a resonance frequency of the TE20 mode by respective amounts different from each other is provided on at least one of the two first wall surfaces, in such a way as to protrude outward from the rectangular cavity resonator.Type: ApplicationFiled: October 26, 2021Publication date: February 10, 2022Applicant: Mitsubishi Electric CorporationInventors: Hidenori YUKAWA, Ryuya SEKI, Hiroto ADO, Hiromasa NAKAJIMA, Yu USHIJIMA, Toru TAKAHASHI
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Patent number: 11114732Abstract: A waveguide unit (2) is closed at one end thereof by a short circuit plane (2a) provided with through holes (3-1 to 3-6). Radio wave absorbers (4-1 to 4-6) absorb a frequency signal being a non-reflective target in the state of being inserted through the through holes (3-1 to 3-6) toward the inside of the waveguide unit (2) and contacting inner surfaces (3?-1 to 3?-6) of the through holes (3-1 to 3-6).Type: GrantFiled: May 22, 2017Date of Patent: September 7, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yu Ushijima, Hidenori Yukawa, Takeshi Oshima, Motomi Watanabe, Naofumi Yoneda
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Patent number: 11101530Abstract: A square waveguide (1) has four ridges (6a, 6b, 7a, 7b). The cross section of the square waveguide (1) perpendicular to a waveguide axial direction is square. Inside the square waveguide (1), two rectangular waveguide terminals (4, 5) are formed by partitioning the inside along the waveguide axial direction. A septum phase plate (2) formed to get narrower stepwisely as its gets closer to a square waveguide terminal (3) opposite to the rectangular waveguide terminals (4, 5) is provided. A projecting portion (8) is provided on a part of a ridge (7b) formed on a ridge-side wall surface opposite to a wall surface, the septum phase plate (2) being joined to the wall surface in a part where the septum phase plate has largest width, the projecting portion (8) being larger than other parts of the ridge (7b) in a cross-sectional shape perpendicular to the waveguide axial direction.Type: GrantFiled: May 26, 2017Date of Patent: August 24, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hidenori Yukawa, Yu Ushijima, Motomi Watanabe, Jun Goto, Naofumi Yoneda, Shinji Arai
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Publication number: 20200381794Abstract: A square waveguide (1) has four ridges (6a, 6b, 7a, 7b). The cross section of the square waveguide (1) perpendicular to a waveguide axial direction is square. Inside the square waveguide (1), two rectangular waveguide terminals (4, 5) are formed by partitioning the inside along the waveguide axial direction. A septum phase plate (2) formed to get narrower stepwisely as its gets closer to a square waveguide terminal (3) opposite to the rectangular waveguide terminals (4, 5) is provided. A projecting portion (8) is provided on a part of a ridge (7b) formed on a ridge-side wall surface opposite to a wall surface, the septum phase plate (2) being joined to the wall surface in a part where the septum phase plate has largest width, the projecting portion (8) being larger than other parts of the ridge (7b) in a cross-sectional shape perpendicular to the waveguide axial direction.Type: ApplicationFiled: May 26, 2017Publication date: December 3, 2020Applicant: Mitsubishi Electric CorporationInventors: Hidenori YUKAWA, Yu USHIJIMA, Motomi WATANABE, Jun GOTO, Naofumi YONEDA, Shinji ARAI
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Publication number: 20200274218Abstract: A waveguide unit (2) is closed at one end thereof by a short circuit plane (2a) provided with through holes (3-1 to 3-6). Radio wave absorbers (4-1 to 4-6) absorb a frequency signal being a non-reflective target in the state of being inserted through the through holes (3-1 to 3-6) toward the inside of the waveguide unit (2) and contacting inner surfaces (3?-1 to 3?-6) of the through holes (3-1 to 3-6).Type: ApplicationFiled: May 22, 2017Publication date: August 27, 2020Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yu USHIJIMA, Hidenori YUKAWA, Takeshi OSHIMA, Motomi WATANABE, Naofumi YONEDA
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Patent number: 10680307Abstract: A substrate is used as one tube wall of a hollow waveguide, the substrate including a strip line wired in an inner layer, a first ground surface formed on a front surface, and a second ground surface formed on a part of a back surface. As a result of such a configuration, a waveguide strip line transducer having the same dimension as the external dimension of the hollow waveguide can be obtained.Type: GrantFiled: June 5, 2017Date of Patent: June 9, 2020Assignee: Mitsubishi Electric CoporationInventors: Motomi Watanabe, Shinji Arai, Tomohiro Takahashi, Takeshi Oshima, Takeshi Yuasa, Takuma Nishimura, Hidenori Yukawa
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Patent number: 10581136Abstract: An input waveguide (6) having one end connected between an L-shaped waveguide (1a) and an L-shaped waveguide (1f) and another end connected to the PORT (1); an output waveguide (7) having one end connected between the L-shaped waveguide (1a) and a flat waveguide (1b) and another end connected to the PORT (2); an output waveguide (8) having one end connected between the flat waveguide (1b) and an L-shaped waveguide (1c) and another end connected to the PORT (3); an output waveguide (9) having one end connected between the L-shaped waveguide (1c) and an L-shaped waveguide (1d) and another end connected to the PORT (4); and a plurality of branching waveguides (10) each having one end connected to the output waveguide (7) and another end connected to the output waveguide (8) are provided.Type: GrantFiled: May 24, 2016Date of Patent: March 3, 2020Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yu Ushijima, Hidenori Yukawa, Motomi Watanabe, Naofumi Yoneda
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Publication number: 20190157735Abstract: A substrate is used as one tube wall of a hollow waveguide, the substrate including a strip line wired in an inner layer, a first ground surface formed on a front surface, and a second ground surface formed on a part of a back surface. As a result of such a configuration, a waveguide strip line transducer having the same dimension as the external dimension of the hollow waveguide can be obtained.Type: ApplicationFiled: June 5, 2017Publication date: May 23, 2019Applicant: Mitsubishi Electric CorporationInventors: Motomi WATANABE, Shinji ARAI, Tomohiro TAKAHASHI, Takeshi OSHIMA, Takeshi YUASA, Takuma NISHIMURA, Hidenori YUKAWA
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Publication number: 20190123414Abstract: An input waveguide (6) having one end connected between an L-shaped waveguide (1a) and an L-shaped waveguide (1f) and another end connected to the PORT (1); an output waveguide (7) having one end connected between the L-shaped waveguide (1a) and a flat waveguide (1b) and another end connected to the PORT (2); an output waveguide (8) having one end connected between the flat waveguide (1b) and an L-shaped waveguide (1c) and another end connected to the PORT (3); an output waveguide (9) having one end connected between the L-shaped waveguide (1c) and an L-shaped waveguide (1d) and another end connected to the PORT (4); and a plurality of branching waveguides (10) each having one end connected to the output waveguide (7) and another end connected to the output waveguide (8) are provided.Type: ApplicationFiled: May 24, 2016Publication date: April 25, 2019Applicant: Mitsubishi Electric CorporationInventors: Yu USHIJIMA, Hidenori YUKAWA, Motomi WATANABE, Naofumi YONEDA
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Publication number: 20180366826Abstract: To achieve a phase shift circuit capable of obtaining good reflection characteristics and a desired phase shift amount at the center frequency without increasing the length in the propagating direction, the phase shift circuit includes: an input waveguide having an input terminal at one end; an output waveguide having an output terminal at one end; a middle waveguide whose thickness is thinner than a thickness of the input waveguide or the output waveguide and whose central position in a thickness direction different from a central position in the thickness direction of the input waveguide or the output waveguide; a first tapered waveguide which connects another end of the input waveguide with one end of the middle waveguide; and a second tapered waveguide which connects another end of the output waveguide with another end of the middle waveguide.Type: ApplicationFiled: March 18, 2016Publication date: December 20, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hidenori YUKAWA, Yu USHIJIMA, Motomi WATANABE, Naofumi YONEDA
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Publication number: 20180358679Abstract: A third coupler (3c) outputs a signal outputted from a first coupler (3a) to an input terminal (8-1) of a second septum polarizer (8b), and outputs a signal outputted from a second coupler (3b) to an input terminal (8-2) of a first septum polarizer (8a).Type: ApplicationFiled: January 12, 2016Publication date: December 13, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hidenori YUKAWA, Yu USHIJIMA, Motomi WATANABE, Naofumi YONEDA
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Patent number: 9929454Abstract: A circularly polarized wave generator includes a rectangular hollow waveguide (1), a plurality of first protrusions (2) that are provided on one pair of opposing wall surfaces in the waveguide (1), have longitudinal directions orthogonal to an axial direction of the waveguide (1), and are arranged at intervals along the axial direction, and a plurality of second protrusions (3) that are provided between the first protrusions (2) on the wall surfaces and are arranged with longitudinal directions thereof running along the axial direction.Type: GrantFiled: April 2, 2015Date of Patent: March 27, 2018Assignee: Mitsubishi Electrics CorporationInventors: Yu Ushijima, Hidenori Yukawa, Tetsu Owada, Shuji Nuimura
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Publication number: 20170170571Abstract: A circularly polarized wave generator includes a rectangular hollow waveguide (1), a plurality of first protrusions (2) that are provided on one pair of opposing wall surfaces in the waveguide (1), have longitudinal directions orthogonal to an axial direction of the waveguide (1), and are arranged at intervals along the axial direction, and a plurality of second protrusions (3) that are provided between the first protrusions (2) on the, all surfaces and are arranged with longitudinal directions thereof running along the axial direction.Type: ApplicationFiled: April 2, 2015Publication date: June 15, 2017Applicant: Mitsubishi Electric CorporationInventors: Yu USHIJIMA, Hidenori YUKAWA, Tetsu OWADA, Shuji NUIMURA
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Patent number: 9000861Abstract: A polarization coupler includes: connector waveguide that connects circular waveguide with quadrangular waveguide arranged in an axial direction of circular waveguide and having short side shorter than an inner diameter of circular waveguide; flat conductor wall formed over connector and circular waveguides, and dividing the inside of connector and circular waveguides arranged parallel to an extending direction of long side of quadrangular waveguide; first inclined surface formed on inner wall of connector waveguide at a position facing one surface of conductor wall, and inclined toward conductor wall as coming closer to quadrangular waveguide; second inclined surface formed on the inner wall of connector waveguide at a position facing the other surface of conductor wall, and inclined toward conductor wall as coming closer to quadrangular waveguide; and coupling hole, formed in circular waveguide, for extracting one polarization-divided by conductor wall out of electromagnetic waves propagated through circulaType: GrantFiled: November 16, 2012Date of Patent: April 7, 2015Assignee: Mitsubishi Electric CorporationInventors: Hiroto Ado, Shuji Nuimura, Tomohiro Mizuno, Hidenori Yukawa, Tetsu Owada, Takaaki Kimata
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Publication number: 20140197908Abstract: A polarization coupler includes: connector waveguide that connects circular waveguide with quadrangular waveguide arranged in an axial direction of circular waveguide and having short side shorter than an inner diameter of circular waveguide; flat conductor wall formed over connector and circular waveguides, and dividing the inside of connector and circular waveguides arranged parallel to an extending direction of long side of quadrangular waveguide; first inclined surface formed on inner wall of connector waveguide at a position facing one surface of conductor wall, and inclined toward conductor wall as coming closer to quadrangular waveguide; second inclined surface formed on the inner wall of connector waveguide at a position facing the other surface of conductor wall, and inclined toward conductor wall as coming closer to quadrangular waveguide; and coupling hole, formed in circular waveguide, for extracting one polarization-divided by conductor wall out of electromagnetic waves propagated through circulaType: ApplicationFiled: November 16, 2012Publication date: July 17, 2014Applicant: Mitsubishi Electric CorporationInventors: Hiroto Ado, Shuji Nuimura, Tomohiro Mizuno, Hidenori Yukawa, Tetsu Owada, Takaaki Kimata
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Patent number: 8520651Abstract: A portable device configured to be connected to a router via a wireless or wired connection. The portable device includes a first processing section that operates in each of a first operation mode to serve as a bridge functional part and a second operation mode to serve as a router functional part. The first processing section operates in the first operation mode when the portable device is connected to the router.Type: GrantFiled: November 22, 2011Date of Patent: August 27, 2013Assignee: Buffalo Inc.Inventors: Daisuke Yamada, Hidenori Yukawa
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Patent number: 8416018Abstract: A variable frequency amplifier includes a main amplifier system 4 for amplifying one of signals into which an input signal is split by a directional coupler 3 to output the amplified signal, and an injection amplifier system 9 for adjusting at least one of the amplitude and phase of the other one of the signals into which the input signal is split by the directional coupler 3 according to a setting provided thereto from outside the variable frequency amplifier, and for amplifying the other signal and injecting this amplified signal into an output side of the main amplifier system 4.Type: GrantFiled: November 4, 2009Date of Patent: April 9, 2013Assignee: Mitsubishi Electric CorporationInventors: Kazuhisa Yamauchi, Hidenori Yukawa, Akira Inoue, Atsushi Yamamoto, Koichi Fujisaki, Hiroomi Ueda
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Publication number: 20120134308Abstract: A portable device configured to be connected to a router via a wireless or wired connection. The portable device includes a first processing section that operates in each of a first operation mode to serve as a bridge functional part and a second operation mode to serve as a router functional part. The first processing section operates in the first operation mode when the portable device is connected to the router.Type: ApplicationFiled: November 22, 2011Publication date: May 31, 2012Applicant: Buffalo Inc.Inventors: Daisuke Yamada, Hidenori Yukawa
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Patent number: D986227Type: GrantFiled: January 9, 2020Date of Patent: May 16, 2023Assignee: Mitsubishi Electric CorporationInventors: Yu Ushijima, Hidenori Yukawa, Motomi Watanabe, Toru Okagaki