Patents by Inventor Hideki Asao
Hideki Asao 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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Patent number: 7471174Abstract: In the structure for connecting a board and a coaxial connector, which electrically connects a high-frequency board 20 mounted in an electroconductive casing 1 and a coaxial connector 10, a transfer board 30 is disposed between the high-frequency board 20 and the coaxial connector 10, and the high-frequency board 20 and the coaxial connector 10 are electrically connected through the transfer board 30.Type: GrantFiled: March 12, 2004Date of Patent: December 30, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Haruhiko Hieda, Hideki Asao
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Patent number: 7127796Abstract: A method of manufacturing a waveguide includes forming two waveguide units, each waveguide unit having a channel defined by a bottom wall and two side walls generally transverse to the bottom wall, flanges extending from the side walls, outside the groove, transverse to the side walls and generally parallel to the bottom wall, the flanges including though holes; joining the two waveguide units to each other so that the flanges of a first of the waveguide units abut the flanges of a second of the waveguide units, with the grooves forming a channel for guiding waves; and, by insert molding, forming a thermoplastic resin cover that fills the through holes in the flanges and covers both of the first and second waveguide units, at least partially.Type: GrantFiled: June 10, 2002Date of Patent: October 31, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Muneaki Mukuda, Takayuki Inuzuka, Naosi Yamada, Hideki Asao, Kazuhisa Henmi
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Publication number: 20060049491Abstract: In the structure for connecting a board and a coaxial connector, which electrically connects a high-frequency board 20 mounted in an electroconductive casing 1 and a coaxial connector 10, a transfer board 30 is disposed between the high-frequency board 20 and the coaxial connector 10, and the high-frequency board 20 and the coaxial connector 10 are electrically connected through the transfer board 30.Type: ApplicationFiled: March 12, 2004Publication date: March 9, 2006Inventors: Haruhiko Hieda, Hideki Asao
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Patent number: 7002429Abstract: A nonreflective waveguide terminator includes a waveguide portion and an electromagnetic wave absorber. The portion has a rectangular opening in a plane perpendicular to a radio-wave propagation direction. The portion has one open end in the direction and the other end closed by a terminating metal internal wall. The portion has a radio-wave propagation space surrounded by first and second metal internal walls parallel to a radio-wave electric field, and third and fourth metal internal walls perpendicular to the field. The exterior shape of the absorber is a parallelepiped. The absorber has a rear-end surface positioned at a predetermined distance from the terminating wall and parallel to the terminating wall or is provided against the terminating wall. The surface of the absorber having the largest rectangular area is on the third or the fourth metal internal wall.Type: GrantFiled: October 16, 2003Date of Patent: February 21, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hideki Asao, Yukitsugu Yoshino, Kazuhisa Henmi, Hideyuki Oohashi, Yukihiro Tahara, Hideo Ogawa, Naofumi Yoneda, Muneaki Mukuda
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Patent number: 6995628Abstract: A waveguide unit including a vertically polarized waveguide, a horizontally polarized waveguide, and a waveguide type-polarized wave converter interposed between said waveguides. The waveguide type-polarized wave converter has a slit, the shape of which being combination of two quadrate parts and a connecting part for connecting the two quadrate parts. Those polarized waveguides and polarized wave converter are integrally manufactured but can be divided into two parts.Type: GrantFiled: November 3, 2003Date of Patent: February 7, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hideki Asao, Hirotaka Kamino, Naofumi Yoneda, Muneaki Mukuda, Koji Yamasaki
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Patent number: 6977620Abstract: High frequency packages have a plurality of apertures (notches) as antennas, and each of these apertures possesses a specific resonance frequency that may exist within the frequency bandwidth used in the high frequency packages in a high frequency band. Thus, the resonance frequency produced within the package is shifted outside the frequency bandwidth. A high frequency package is provided with a metal frame disposed on a metal bottom plate and having apertures for connecting with external terminals, dielectrics being disposed on the bottom metal plate, and on which a high frequency transmission line and a plurality of input and output terminals are formed, microwave circuitry being contained in the metal frame, and a metal lid, wherein the frequency of the aperture's resonance arising from electromagnetic field between the metal frame and the metal bottom plate, is shifted outside the frequency bandwidth by diminishing and optimizing the width of the aperture.Type: GrantFiled: April 15, 2004Date of Patent: December 20, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hideki Asao, Hiroshi Osakada, Hideyuki Oohashi, Kyouko Shinozaki, Kenji Tatano
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Publication number: 20050200424Abstract: In the inside of the converting portion of a microstripline waveguide converter, on the backside surface of a dielectric substrate, which constitutes, for example, a “stripline antenna,” a strip conductor pattern, which serves as a half-wavelength strip resonator, is disposed, to thereby add a band rejection function to the converter. The size of the converter is thereby reduced.Type: ApplicationFiled: August 3, 2004Publication date: September 15, 2005Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Hideji Takeda, Hideki Asao, Hideki Tsuzuki, Akiko Katayama
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Publication number: 20050104792Abstract: High frequency packages have a plurality of apertures (notches) as antennas, and each of these apertures possesses a specific resonance frequency that may exist within the frequency bandwidth used in the high frequency packages in a high frequency band. Thus, the resonance frequency produced within the package is shifted outside the frequency bandwidth. A high frequency package is provided with a metal frame disposed on a metal bottom plate and having apertures for connecting with external terminals, dielectrics being disposed on the bottom metal plate, and on which a high frequency transmission line and a plurality of input and output terminals are formed, microwave circuitry being contained in the metal frame, and a metal lid, wherein the frequency of the aperture's resonance arising from electromagnetic field between the metal frame and the metal bottom plate, is shifted outside the frequency bandwidth by diminishing and optimizing the width of the aperture.Type: ApplicationFiled: April 15, 2004Publication date: May 19, 2005Applicant: MITSUBISHI DENKI KABUSHIKIInventors: Hideki Asao, Hiroshi Osakada, Hideyuki Oohashi, Kyouko Shinozaki, Kenji Tatano
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Publication number: 20050017815Abstract: A nonreflective waveguide terminator includes a waveguide portion and an electromagnetic wave absorber. The portion has a rectangular opening in a plane perpendicular to a radio-wave propagation direction. The portion has one open end in the direction and the other end closed by a terminating metal internal wall. The portion has a radio-wave propagation space surrounded by first and second metal internal walls parallel to a radio-wave electric field, and third and fourth metal internal walls perpendicular to the field. The exterior shape of the absorber is a parallelepiped. The absorber has a rear-end surface positioned at a predetermined distance from the terminating wall and parallel to the terminating wall or is provided against the terminating wall. The surface of the absorber having the largest rectangular area is on the third or the fourth metal internal wall.Type: ApplicationFiled: October 16, 2003Publication date: January 27, 2005Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Hideki Asao, Yukitsugu Yoshino, Kazuhisa Henmi, Hideyuki Oohashi, Yukihiro Tahara, Hideo Ogawa, Naofumi Yoneda, Muneaki Mukuda
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Publication number: 20040246062Abstract: A waveguide unit including a vertically polarized waveguide, a horizontally polarized waveguide, and a waveguide type-polarized wave converter interposed between said waveguides. The waveguide type-polarized wave converter has a slit, the shape of which being combination of two quadrate parts and a connecting part for connecting the two quadrate parts. Those polarized waveguides and polarized wave converter are integrally manufactured but can be divided into two parts.Type: ApplicationFiled: November 3, 2003Publication date: December 9, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Hideki Asao, Hirotaka Kamino, Naofumi Yoneda, Muneaki Mukuda, Koji Yamasaki
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Publication number: 20040056739Abstract: First and second members 1a, 1b, each having a U-shaped groove 20 of identical width and length, are joined together so as to constitute a waveguide channel while the U-shaped grooves 20 are opposed to each other. The first and second members 1a, 1b are fixedly fastened together by fastening bolts 2 and nuts 3 in the direction in which mating surfaces 5 are pressed together. Fastening force caused by the bolts 2 and the nuts 3 is depicted as circles 40 projected onto the mating surfaces 5 of the first and second members 1a, 1b. The bolts 2 and the nuts 3 are arranged such that lines of intersection (junction ridge lines) 6, each defined between a wall surface of the waveguide channel and the mating surface, are included in the respective projected circles 40.Type: ApplicationFiled: May 2, 2003Publication date: March 25, 2004Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Takayuki Inuzuka, Muneaki Mukuda, Naosi Yamada, Hideki Asao, Kazuhisa Henmi, Kouji Yamasaki
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Publication number: 20030106203Abstract: After through holes (25) are formed on flange portions (23) of a pair of waveguide units (20) and (21), and the pair of the waveguide units (20) and (21), in which the through holes (25) have been formed, are joined together, insert molding of the pair of the joined waveguide units (20) and (21) is executed using a thermoplastic resin to form a resin cover (30) filled into the through holes (25) and covers the pair of the waveguide units (20) and (21). Accordingly, an improved assembling efficiency, stronger fastening force between waveguide units, and better air-tightness of the waveguide are obtained by using resin molding to fasten the pair of the waveguides.Type: ApplicationFiled: January 21, 2003Publication date: June 12, 2003Inventors: Muneaki Mukuda, Takayuki Inuzuka, Naosi Yamada, Hideki Asao, Kazuhisa Henmi
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Patent number: 5684492Abstract: In order to perform feeding to an inverted F antenna having a plate conductor of an approximately rectangular shape for forming a radiation conductor and a ground conductor arranged in parallel with the plate conductor, a strip conductor plate connected to a feeder line is provided on the ground conductor via a dielectric substrate. Hence, the feeding from the feeder line to the inverted F antenna 37 is performed by an electric field coupling of the plate conductor and the strip conductor plate. The inverted F antenna and a resonator are integrated by coupling means to carry out an impedance matching, and the inverted F antenna and the resonator 62 constitute a band pass filter.Type: GrantFiled: March 1, 1995Date of Patent: November 4, 1997Assignees: Mitsubishi Denki Kabushiki Kaisha, Nippon Telegraph & Telephone CorporationInventors: Kenichi Kagoshima, Koichi Tsunekawa, Moriyasu Miyazaki, Hideki Asao, Osami Ishida, Makoto Matsunaga, Takashi Katagi
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Patent number: 5434579Abstract: In order to perform feeding to an inverted F antenna having a plate conductor of an approximately rectangular shape for forming a radiation conductor and a ground conductor arranged in parallel with the place conductor, a strip conductor plate connected to a feeder line is provided on the ground conductor via a dielectric substrate. Hence, the feeding from the feeder line to the inverted F antenna 37 is performed by an electric field coupling of the plate conductor and the strip conductor plate. The inverted F antenna and a resonator are integrated by coupling means to carry out an impedance matching, and the inverted F antenna and the resonator 62 constitute a band pass filter.Type: GrantFiled: November 23, 1992Date of Patent: July 18, 1995Assignees: Mitsubishi Denki Kabushiki Kaisha, Telephone Corporation, Nippon TelegraphInventors: Kenichi Kagoshima, Koichi Tsunekawa, Moriyasu Miyazaki, Hideki Asao, Osami Ishida, Makoto Matsunaga, Takashi Katagi
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Patent number: 5410277Abstract: A frequency synthesizer, which controls the fluctuation of frequency not only of a long period but also a short period, ensures a wide frequency control range and can be realized at a low cost, can be obtained.Type: GrantFiled: June 15, 1994Date of Patent: April 25, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hideki Asao, Yutaka Ozaki, Tetsu Owada, Hideyuki Oh-Hashi