Patents by Inventor Yukihiro Tahara
Yukihiro Tahara 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: 20230057079Abstract: A conventional millimeter wave radar cannot detect a failure when there is not satisfied the condition that a road exists in front of a vehicle or that in two or more radar apparatuses, a leakage electric wave from another radar can be detected. A failure detection apparatus according to the present disclosure calculates reception power values from a reception processing signal for each antenna and compares the reception power value with a reference power value determined by a reference power calculation unit so as to perform a failure determination. There is provided a failure determination unit that compares the reference power value for a failure determination with the power value obtained from a reception processing signal outputted from each of receivers so as to perform a failure determination for each of the receivers.Type: ApplicationFiled: March 26, 2020Publication date: February 23, 2023Applicant: Mitsubishi Electric CorporationInventors: Takuya TANIGUCHI, Yuichi GODA, Yukihiro TAHARA
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Publication number: 20200077629Abstract: On the basis of monitoring information acquired by a monitoring device (4), a control device (6) determines a capacity and a position of a net (3), a winding device (2) adjusts the capacity of the net (3) to the capacity determined by the control device (6), and an underwater moving device (5) moves the net (3) to the position determined by the control device (6).Type: ApplicationFiled: April 26, 2017Publication date: March 12, 2020Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Tai Tanaka, Hidetoshi Makimura, Momoyo Hino, Takeshi Okada, Satoru Tanaka, Yukihiro Tahara
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Patent number: 10027011Abstract: The waveguide device, in which first/second openings are formed at end parts of a waveguide path, comprises a waveguide path obtained by uniting first/second waveguides. The first waveguide is provided with a first recessed part which has an opening with a same shape as the first opening and has a bottom part formed in a first direction as seen from the opening. The second waveguide is provided with a second recessed part which has an opening with a same shape as the second opening and has a bottom part formed in a second direction as seen from the opening. The first/second waveguides are united in a manner such that, positions of the bottom parts of the first/second recessed parts are different from each other in a direction differing from the first/second directions, and the first/second recessed parts connect with each other at the respective bottom parts.Type: GrantFiled: August 31, 2015Date of Patent: July 17, 2018Assignee: Mitsubishi Electric CorporationInventors: Akimichi Hirota, Yukihiro Tahara, Takashi Maruyama, Tomohiro Takahashi, Kazuyoshi Yamashita
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Publication number: 20170257942Abstract: A first ground elimination portion 3a formed in a ground layer is formed in a size such that a characteristic impedance determined by the first ground elimination portion 3a and component pads 1a is higher than a characteristic impedance determined by a ground conductor 2a and a transmission line 1b. When an outer shapes of the component pads 1a are projected on the ground layer, the center of a region interposed between the conductor pads 1a is positioned at the center of the first ground elimination portion 3a.Type: ApplicationFiled: January 6, 2015Publication date: September 7, 2017Applicant: Mitsubishi Electric CorporationInventors: Shoji KOMATSU, Akimichi HIROTA, Yukihiro TAHARA, Koji SHIBUYA, Yoshihiro AKEBOSHI
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Publication number: 20170141448Abstract: The waveguide device, in which first/second openings are formed at end parts of a waveguide path, comprises a waveguide path obtained by uniting first/second waveguides. The first waveguide is provided with a first recessed part which has an opening with a same shape as the first opening and has a bottom part formed in a first direction as seen from the opening. The second waveguide is provided with a second recessed part which has an opening with a same shape as the second opening and has a bottom part formed in a second direction as seen from the opening. The first/second waveguides are united in a manner such that, positions of the bottom parts of the first/second recessed parts are different from each other in a direction differing from the first/second directions, and the first/second recessed parts connect with each other at the respective bottom parts.Type: ApplicationFiled: August 31, 2015Publication date: May 18, 2017Applicant: Mitsubishi Electric CorporationInventors: Akimichi HIROTA, Yukihiro TAHARA, Takashi MARUYAMA, Tomohiro TAKAHASHI, Kazuyoshi YAMASHITA
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Waveguide-microstrip line converter having connection conductors spaced apart by different distances
Patent number: 8723616Abstract: Provided is a waveguide-microstrip line converter, including: a waveguide; a dielectric substrate that is connected to cover one end of the waveguide; a strip conductor that is disposed on a front surface of the dielectric substrate; a conductor plate that is disposed the front surface of the dielectric substrate, and connected to the strip conductor; a ground conductor that is disposed on a rear surface of the dielectric substrate; and a plurality of connection conductors that connect a periphery of the conductor plate and the ground conductor, in which: the ground conductor has an opening formed therein in a connection region; the strip conductor and the ground conductor form a microstrip line; and the plurality of connection conductors are arranged so that a distance between two lines of the plurality of connection conductors that are aligned in a longitudinal direction of the microstrip line, and disposed on both opposing sides of the conductor plate in a vicinity of a connection portion is narrower thanType: GrantFiled: February 5, 2010Date of Patent: May 13, 2014Assignee: Mitsubishi Electric CorporationInventors: Akimichi Hirota, Yukihiro Tahara, Naofumi Yoneda -
Patent number: 8723618Abstract: The power combiner/distributor for performing one of power combination and power division, includes: a first branch circuit (117) having a plurality of first branch side terminals (113, 114) connected in parallel and one first combination side terminal (115), which are connected through a first power combination point (116); and a second branch circuit (137) having a plurality of second branch side terminals (133, 134) connected in parallel and one second combination side terminal (135) connected through a second power combination point (136), the one first combination side terminal and the one of plurality of second branch side terminals being connected to each other, in which a length from the first power combination point to the second power combination point is an integral multiple of ½ wavelength.Type: GrantFiled: April 12, 2011Date of Patent: May 13, 2014Assignee: Mitsubishi Electric CorporationInventors: Akimichi Hirota, Yukihiro Tahara, Naofumi Yoneda, Yuji Sakai
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Patent number: 8618878Abstract: A multiport amplifier and a wireless device using the same are obtained in which isolation among output terminals is improved, whereby the quality of communication is improved. The multiport amplifier includes an input hybrid, an output hybrid, a plurality of amplifiers and a plurality of gain and phase control circuits that are inserted between the input hybrid and the output hybrid, a plurality of output coupling circuits that are inserted between the output hybrid and a plurality of output terminals so that they receive output extraction signals corresponding to a plurality of output signals, and a feedback circuit including a frequency selection circuit that is inserted between the plurality of output coupling circuits and the plurality of gain and phase control circuits.Type: GrantFiled: October 1, 2009Date of Patent: December 31, 2013Assignee: Mitsubishi Electric CorporationInventors: Masatake Hangai, Kazutomi Mori, Kenichi Tajima, Yukihiro Tahara, Morishige Hieda
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Patent number: 8471647Abstract: In cases where a power divider is constructed by using a multilayer substrate, a power divider is obtained which is smaller in size and has a good reflection property. The power divider according to the present invention is provided with a multilayer dielectric substrate (1), strip conductor patterns (2a through 2c) formed on one surface of the multilayer dielectric substrate (1), and a ground conductor pattern (3) formed on the other surface of the multilayer dielectric substrate (1), wherein a transmission line is composed of the dielectric substrate (1), the strip conductor patterns (2a through 2c) and the ground conductor pattern (3), and the transmission line has its one end branched to form a plurality of branch lines (12a, 12b), with an isolation resistance (4) being formed between the branch lines.Type: GrantFiled: April 11, 2008Date of Patent: June 25, 2013Assignee: Mitsubishi Electric CorporationInventors: Yukihiro Tahara, Takeshi Yuasa, Naofumi Yoneda
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Patent number: 8169274Abstract: It is an object to obtain a transmission line converter in which a rectangular waveguide provided under a transmission line may be reduced in size. In the transmission line converter including: a rectangular waveguide (11); a slot (5) provided in a wall surface of the rectangular waveguide (11); and a transmission line (13) which extends in a direction of a tube axis of the rectangular waveguide (11) and includes signal conductors (2 and 3) and a ground conductor (4), the slot (5) is provided in a narrower wall surface of the rectangular waveguide (11) and has a shape in which a central portion of the slot (5) includes an oblique portion to the tube axis of the rectangular waveguide (11) and at least one of both end portions of the oblique portion includes a portion parallel to the tube axis of the rectangular waveguide (11), and the wall surface of the rectangular waveguide (11) in which the slot (5) is provided is a part of the ground conductor (4).Type: GrantFiled: July 5, 2007Date of Patent: May 1, 2012Assignee: Mitsubishi Electric CorporationInventors: Yukihiro Tahara, Hideyuki Oh-Hashi, Tetsuya Ohba, Satoshi Yamaguchi
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Patent number: 8134514Abstract: A planar antenna including slot arrays configured to set a narrow interval between elements so as to perform beam scanning in a wide angle range while keeping low loss and low profile. The planar antenna includes: a coaxial line including an inner conductor, an outer conductor provided so as to surround a circumference of the inner conductor, and both ends short-circuited; a feeding mechanism for exciting the coaxial line; and a plurality of slots formed on the outer conductor with a certain angle with respect to a tube direction of the coaxial line and having approximately a resonance length.Type: GrantFiled: November 2, 2007Date of Patent: March 13, 2012Assignee: Mitsubishi Electric CorporationInventors: Satoshi Yamaguchi, Yukihiro Tahara, Kazushi Nishizawa, Hiroaki Miyashita, Hideyuki Oohashi
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Publication number: 20110267153Abstract: Provided is a waveguide-microstrip line converter, including: a waveguide; a dielectric substrate that is connected to cover one end of the waveguide; a strip conductor that is disposed on a front surface of the dielectric substrate; a conductor plate that is disposed the front surface of the dielectric substrate, and connected to the strip conductor; a ground conductor that is disposed on a rear surface of the dielectric substrate; and a plurality of connection conductors that connect a periphery of the conductor plate and the ground conductor, in which: the ground conductor has an opening formed therein in a connection region; the strip conductor and the ground conductor forma microstrip line; and the plurality of connection conductors are arranged so that a distance between two lines of the plurality of connection conductors that are aligned in a longitudinal direction of the microstrip line, and disposed on both opposing sides of the conductor plate in a vicinity of a connection portion is narrower than aType: ApplicationFiled: February 5, 2010Publication date: November 3, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Akimichi Hirota, Yukihiro Tahara, Naofumi Yoneda
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Publication number: 20110267141Abstract: A multiport amplifier and a wireless device using the same are obtained in which isolation among output terminals is improved, whereby the quality of communication is improved. The multiport amplifier includes an input hybrid, an output hybrid, a plurality of amplifiers and a plurality of gain and phase control circuits that are inserted between the input hybrid and the output hybrid, a plurality of output coupling circuits that are inserted between the output hybrid and a plurality of output terminals so that they receive output extraction signals corresponding to a plurality of output signals, and a feedback circuit including a frequency selection circuit that is inserted between the plurality of output coupling circuits and the plurality of gain and phase control circuits.Type: ApplicationFiled: October 1, 2009Publication date: November 3, 2011Applicant: Mitsubishi Electric CorporationInventors: Masatake Hangai, Kazutomi Mori, Kenichi Tajima, Yukihiro Tahara, Morishige Hieda
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Publication number: 20110260771Abstract: The power combiner/distributor for performing one of power combination and power division, includes: a first branch circuit (117) having a plurality of first branch side terminals (113, 114) connected in parallel and one first combination side terminal (115), which are connected through a first power combination point (116); and a second branch circuit (137) having a plurality of second branch side terminals (133, 134) connected in parallel and one second combination side terminal (135) connected through a second power combination point (136), the one first combination side terminal and the one of plurality of second branch side terminals being connected to each other, in which a length from the first power combination point to the second power combination point is an integral multiple of ½ wavelength.Type: ApplicationFiled: April 12, 2011Publication date: October 27, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Akimichi HIROTA, Yukihiro Tahara, Naofumi Yoneda, Yuji Sakai
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Publication number: 20110032049Abstract: In cases where a power divider is constructed by using a multilayer substrate, a power divider is obtained which is smaller in size and has a good reflection property. The power divider according to the present invention is provided with a multilayer dielectric substrate (1), strip conductor patterns (2a through 2c) formed on one surface of the multilayer dielectric substrate (1), and a ground conductor pattern (3) formed on the other surface of the multilayer dielectric substrate (1), wherein a transmission line is composed of the dielectric substrate (1), the strip conductor patterns (2a through 2c) and the ground conductor pattern (3), and the transmission line has its one end branched to form a plurality of branch lines (12a, 12b), with an isolation resistance (4) being formed between the branch lines.Type: ApplicationFiled: April 11, 2008Publication date: February 10, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yukihiro Tahara, Takeshi Yuasa, Naofumi Yoneda
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Publication number: 20100176894Abstract: A transmission line converter in which a rectangular waveguide provided under a transmission line may be reduced in size. The transmission line converter includes: a rectangular waveguide; a slot provided in a wall surface of the rectangular waveguide; and a transmission line which extends in a direction of a tube axis of the rectangular waveguide and includes signal conductors and a ground conductor, the slot is provided in a narrower wall surface of the rectangular waveguide and has a shape in which a central portion of the slot includes an oblique portion to the tube axis of the rectangular waveguide and at least one of both end portions of the oblique portion includes a portion parallel to the tube axis of the rectangular waveguide, and the wall surface of the rectangular waveguide in which the slot is provided is a part of the ground conductor.Type: ApplicationFiled: July 5, 2007Publication date: July 15, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yukihiro Tahara, Hideyuki Oh-Hashi, Tetsuya Ohba, Satoshi Yamaguchi
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Publication number: 20100001916Abstract: A planar antenna including slot arrays configured to set a narrow interval between elements so as to perform beam scanning in a wide angle range while keeping low loss and low profile. The planar antenna includes: a coaxial line including an inner conductor, an outer conductor provided so as to surround a circumference of the inner conductor, and both ends short-circuited; a feeding mechanism for exciting the coaxial line; and a plurality of slots formed on the outer conductor with a certain angle with respect to a tube direction of the coaxial line and having approximately a resonance length.Type: ApplicationFiled: November 2, 2007Publication date: January 7, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Satoshi Yamaguchi, Yukihiro Tahara, Kazushi Nishizawa, Hiroaki Miyashita, Hideyuki Oohashi
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Patent number: 7439831Abstract: A transition circuit includes: a waveguide having a notched portion formed by cutting away a portion of the tube wall of the waveguide from the end portion of the waveguide; a dielectric substrate in which a portion extending outside the waveguide through the notched portion of the waveguide is formed; a plurality of polygonal conductor patterns formed regularly disposed on the dielectric substrate; a ground conductor formed on the dielectric substrate; through holes electrically connecting this ground conductor and each of the conductor patterns; an open stub formed on the dielectric substrate; and the conductor of a microwave transmission line, which is formed on the portion of the dielectric substrate, extending outside the waveguide, and which is electrically connected to the open stub.Type: GrantFiled: February 27, 2004Date of Patent: October 21, 2008Assignee: Mitsubishi Electric CorporationInventors: Araki Ohno, Hideyuki Ohhashi, Yukihiro Tahara, Katsuhisa Kodama
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Publication number: 20070188258Abstract: A transition circuit includes: a waveguide having a notched portion formed by cutting away a portion of the tube wall of the waveguide from the end portion of the waveguide; a dielectric substrate in which a portion extending outside the waveguide through the notched portion of the waveguide is formed; a plurality of polygonal conductor patterns formed regularly disposed on the dielectric substrate; a ground conductor formed on the dielectric substrate; through holes electrically connecting this ground conductor and each of the conductor patterns; an open stub formed on the dielectric substrate; and the conductor of a microwave transmission line, which is formed on the portion of the dielectric substrate, extending outside the waveguide, and which is electrically connected to the open stub.Type: ApplicationFiled: February 27, 2004Publication date: August 16, 2007Inventors: Araki Ohno, Hideyuki Ohhashi, Yukihiro Tahara, Katsuhisa Kodama
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Patent number: 7205862Abstract: The invention provides a dielectric substrate; a ground conductor pattern is formed on one surface of the dielectric substrate and which has a ground conductor pattern omission portion; a strip conductor pattern formed on a surface of the dielectric substrate opposite to the surface having the ground conductor pattern; a conductor pattern for shorting of a waveguide formed so as to be continuously connected to the strip conductor pattern; connecting conductors for connecting the ground conductor pattern and the conductor pattern to each other within the dielectric substrate; and a waveguide connected to the dielectric substrate so as to correspond to the ground conductor pattern omission portion. Also, a microstrip line is constituted by the strip conductor pattern, the ground conductor pattern, and the dielectric substrate. Further, a dielectric waveguide shorting portion is constituted by the conductor pattern, the ground conductor pattern, and the connecting conductors.Type: GrantFiled: December 15, 2005Date of Patent: April 17, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yukihiro Tahara, Moriyasu Miyazaki, Kouichi Matsuo, Kazuyoshi Inami, Makoto Matsunaga