Patents by Inventor Kengo Shiiba

Kengo Shiiba 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).

  • Patent number: 8507072
    Abstract: An antenna apparatus used in a wireless communication medium or a wireless communication medium processing apparatus constructed by a constitution of including a magnetic member in which a magnetic ceramic powder is used as a major component thereof and which is provided with flexibility; an antenna formed at a surface or inside of the magnetic member, and a matching circuit of the antenna formed at the surface or the inside of the magnetic member.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: August 13, 2013
    Assignee: Panasonic Corporation
    Inventors: Hidetsugu Fujimoto, Kengo Shiiba, Hiromi Sakita, Kouji Nishimura, Hatsuhiro Yano, Yoshihiko Takayama, Yoshitaka Mizoguchi, Yumie Watanabe
  • Patent number: 6897815
    Abstract: A surface-mount type antenna and a communication terminal using the same. A radiator electrode is provided on a first principal face of a substrate. A ground electrode is provided on the second principal face of the substrate. A first feeder electrode has at least a portion thereof provided on a side face and on the second principal face of the substrate. A second feeder electrode is provided on an inner wall face of a hole formed parallel to the first and second principal faces. The first feeder electrode and the ground electrode are kept in a non-contact state. The first feeder electrode and the second feeder electrode are in electrical contact. A mobile communication terminal using the surface-mount type antenna is small in size, exhibits small variations in characteristics, and provides high productivity and reliability.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: May 24, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuhide Goto, Yoshio Onaka, Makoto Yoshinomoto, Hiromi Sakita, Katsumi Sasaki, Kengo Shiiba
  • Patent number: 6862003
    Abstract: A chip antenna that is simple in structure, produces small variation in antenna characteristics between individual antennas, and requires no circuit adjustments, is excellent in productivity. The chip antenna is capable of being mounted on a circuit board, as well as a wireless terminal using the chip antenna. A method of fabricating the chip antenna. A core body is made from an insulating material in a quadrangular or circular cylinder shape. A conductor in a helical shape is mounted on the side surface of the core body. A terminal portion is provided on the core body and electrically connected with an end portion of the conductor. The width, depth, and length of the core body are within ranges of 0.5-5 mm, 0.5-5 mm, and 4-40 mm, respectively. Intrinsic volume resistance and relative dielectric constant of the material are 1013 ?·m or above and 40 or below, respectively.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: March 1, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Makoto Yoshinomoto, Hiromi Sakita, Kenzo Isozaki, Kengo Shiiba, Kazuhide Goto, Mitsuo Kanmera, Masanobu Kuroki, Katsumi Sasaki
  • Patent number: 6850751
    Abstract: A non-reciprocal circuit device has a length, a width, and a thickness denoted respectively by L1, L2, and L3, and the overall dimensions of 2.5 mm<L1<7.0 mm, 2.5 mm<L2<7.0 mm, and 1.0 mm<L3<3.5 mm. When a projected area of the substrate of the device is orthogonally projected on a plane parallel to a base surface of the substrate is denoted by S1, the substrate holds a proportional relation to S1/(L1×L2)=0.1 to 0.78. When a thickness of the magnet of the device is denoted by L4, the magnet holds a proportional relation of L4/L3=0.2 to 0.5. When a projected area of the magnet orthogonally formed on a plane parallel to a surface of the magnet is denoted by S2, they have a proportional relation of S1/S2=0.15 to 0.83.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: February 1, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kengo Shiiba, Munenori Fujimura, Hitoshi Uchi, Shuichiro Yamaguchi, Takayuki Takeuchi, Yasuhiko Horio, Hiroshi Kawano, Hiromi Tokunaga
  • Publication number: 20030189520
    Abstract: A surface-mount type antenna and a communication terminal using the same. A radiator electrode is provided on a first principal face of a substrate. A ground electrode is provided on the second principal face of the substrate. A first feeder electrode has at least a portion thereof provided on a side face and on the second principal face of the substrate. A second feeder electrode is provided on an inner wall face of a hole formed parallel to the first and second principal faces. The first feeder electrode and the ground electrode are kept in a non-contact state. The first feeder electrode and the second feeder electrode are in electrical contact. A mobile communication terminal using the surface-mount type antenna is small in size, exhibits small variations in characteristics, and provides high productivity and reliability.
    Type: Application
    Filed: April 1, 2003
    Publication date: October 9, 2003
    Inventors: Kazuhide Goto, Yoshio Onaka, Makoto Yoshinomoto, Hiromi Sakita, Katsumi Sasaki, Kengo Shiiba
  • Patent number: 6559802
    Abstract: A surface mount type antenna and a communication terminal using the same. A radiator electrode is provided on a first principal face of a substrate. A ground electrode is provided on the second principal face of the substrate. A first feeder electrode has at least a portion thereof provided on a side face and on the second principal face of the substrate. A second feeder electrode is provided on an inner wall face of a hole formed parallel to the first and second principal faces. The first feeder electrode and the ground electrode are kept in a non-contact state. The first feeder electrode and the second feeder electrode are in electrical contact. A mobile communication terminal using the surface-mount type antenna is small in size, exhibits small variations in characteristics, and provides high productivity and reliability.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: May 6, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuhide Goto, Yoshio Onaka, Makoto Yoshinomoto, Hiromi Sakita, Katsumi Sasaki, Kengo Shiiba
  • Publication number: 20030011532
    Abstract: A chip antenna that is simple in structure, produces small variation in antenna characteristics between individual antennas, and requires no circuit adjustments, is excellent in productivity. The chip antenna is capable of being mounted on a circuit board, as well as a wireless terminal using the chip antenna. A method of fabricating the chip antenna. A core body is made from an insulating material in a quadrangular or circular cylinder shape. A conductor in a helical shape is mounted on the side surface of the core body. A terminal portion is provided on the core body and electrically connected with an end portion of the conductor. The width, depth, and length of the core body are within ranges of 0.5-5 mm, 0.5-5 mm, and 4-40 mm, respectively. Intrinsic volume resistance and relative dielectric constant of the material are 1013 &OHgr;·m or above and 40 or below, respectively.
    Type: Application
    Filed: September 17, 2002
    Publication date: January 16, 2003
    Inventors: Makoto Yoshinomoto, Hiromi Sakita, Kenzo Isozaki, Kengo Shiiba, Kazuhide Goto, Mitsuo Kanmera, Masanobu Kuroki, Katsumi Sasaki
  • Patent number: 6486853
    Abstract: A chip antenna that is simple in structure, produces small variation in antenna characteristics between individual antennas, and requires no circuit adjustments, is excellent in productivity. The chip antenna is capable of being mounted on a circuit board, as well as a wireless terminal using the chip antenna. A method of fabricating the chip antenna. A core body is made from an insulating material in a quadrangular or circular cylinder shape. A conductor in a helical shape is mounted on the side surface of the core body. A terminal portion is provided on the core body and electrically connected with an end portion of the conductor. The width, depth, and length of the core body are within ranges of 0.5-5 mm, 0.5-5 mm, and 4-40 mm, respectively. Intrinsic volume resistance and relative dielectric constant of the material are 1013&OHgr;·m or above and 40 or below, respectively.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: November 26, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Makoto Yoshinomoto, Hiromi Sakita, Kenzo Isozaki, Kengo Shiiba, Kazuhide Goto, Mitsuo Kanmera, Masanobu Kuroki, Katsumi Sasaki
  • Publication number: 20020167446
    Abstract: A surface-mount type antenna and a communication terminal using the same. A radiator electrode is provided on a first principal face of a substrate. A ground electrode is provided on the second principal face of the substrate. A first feeder electrode has at least a portion thereof provided on a side face and on the second principal face of the substrate. A second feeder electrode is provided on an inner wall face of a hole formed parallel to the first and second principal faces. The first feeder electrode and the ground electrode are kept in a non-contact state. The first feeder electrode and the second feeder electrode are in electrical contact. A mobile communication terminal using the surface-mount type antenna is small in size, exhibits small variations in characteristics, and provides high productivity and reliability.
    Type: Application
    Filed: September 24, 2001
    Publication date: November 14, 2002
    Inventors: Kazuhide Goto, Yoshio Onaka, Makoto Yoshinomoto, Hiromi Sakita, Katsumi Sasaki, Kengo Shiiba
  • Publication number: 20020033778
    Abstract: A chip antenna simple in structure, producing small variation in antenna characteristics between individual antennas, requiring no circuit adjustments, excellent in productivity, and capable of being mounted on a circuit board, as well as a wireless terminal using the same and a method of fabricating the same. A core body is made from an insulating material in a quadrangular or circular cylinder shape. A conductor in a helical shape is mounted on the side surface of the core body. A terminal portion is provided on the core body and electrically connected with an end portion of the conductor. The width, depth, and height of the core body are within ranges of 0.5-5 mm, 0.5-5 mm, and 4-40 mm, respectively. Intrinsic volume resistance and relative dielectric constant of the material are 1013 &OHgr;·m or above and 40 or below, respectively.
    Type: Application
    Filed: May 16, 2001
    Publication date: March 21, 2002
    Inventors: Makoto Yoshinomoto, Hiromi Sakita, Kenzo Isozaki, Kengo Shiiba, Kazuhide Goto, Mitsuo Kanmera, Masanobu Kuroki, Katsumi Sasaki
  • Patent number: 5225951
    Abstract: A thin film magnetic head includes yokes for leading magnetic flux of signals generated from a magnetic recording medium up to a magnetic resistance effect element. The yokes are made of sputtered films having internal compressive stress therein. The internal stress in the yokes which are deleterious to the magnetic properties of the magnetic resistance effect element can be negated or reduced by including a film of material on the yokes for compensating for the internal stresses.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: July 6, 1993
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tohru Kira, Kozi Otsuka, Kazuyoshi Imae, Mitsuhiko Yoshikawa, Kengo Shiiba
  • Patent number: 5155644
    Abstract: The yoke thin film magnetic head according to the present invention includes yokes for leading the magnetic flux of signals generated from the magnetic recording medium up to the magnetic resistance effect element, which yokes are made of sputtered films having compressive stress therein. Therefore, the internal stress in the yokes which cause bad influences upon magnetic properties of the magnetic resistance effect element can be negated or reduced, with less Barkhausen noises produced.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: October 13, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tohru Kira, Kozi Otsuka, Kazuyoshi Imae, Mitsuhiko Yoshikawa, Kengo Shiiba
  • Patent number: 5021909
    Abstract: A yoke type thin-film magneto-resistive heat includes a magneto-resistive element that detects the magnetic field generated in the magnetic recording medium as resistance changes, a yoke, that leads magnetic flux from the head gap to the above mentioned magneto-resistive element, a DC magnetic field application system, that applies a desirable weak magnetic field to the above mentioned longitudinal direction of the magneto-resistive element, and a conductor, that applies a desirable bias magnetic field to the above mentioned magneto-resistive element in the strip width direction. The easy axis of magnetization of the magneto-resistive element is inclined in a range of 20.degree.-40.degree. to the mentioned longitudinal direction of the magneto-resistive element, so that, anisotropic angle dispersion conditions are relaxed, at the same time, by applying a desirable bias magnetic field to the magneto-resistive element in the strip width direction.
    Type: Grant
    Filed: April 19, 1989
    Date of Patent: June 4, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kengo Shiiba
  • Patent number: 4803581
    Abstract: A thin film magnetic head including a lower yoke made of magnetic material having a high permeability, a magnetoresistive element and an upper yoke for transmitting magnetic flux to the magnetoresistive element. The upper yoke overlaps, at its rear end portion, a front end portion of the magnetoresistive element, while the lower yoke is formed, at its portion confronting the magnetoresistive element, with a groove such that the magnetoresistive element overlaps, at its rear end portion, the lower yoke.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: February 7, 1989
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toru Kira, Teiichi Miyauchi, Kiyohito Nakai, Kengo Shiiba, Mitsuhiko Yoshikawa