Patents by Inventor Hiroyuki Aoyama

Hiroyuki Aoyama 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).

  • Publication number: 20070290944
    Abstract: An antenna device is provided which is capable of saving space, of operating in wide bands (in a multi-band) and of achieving an excellent gain and maintaining non-directivity of vertically polarized waves in each band. The antenna device has a conductor antenna. An end portion 111a on one end side of the conductor antenna is mounted as a power feeding section and an end portion 112a on the other end side of the conductor antenna 110 is mounted as an open end terminal. The antenna device also has a base body made of an insulating material which is coupled to one end and other end of the conductor antenna. The base band is coupled in a place where an electric field strength of the conductor antenna having a folded-back portion is increased, thus achieving the wideband and high-gain antenna device.
    Type: Application
    Filed: March 22, 2007
    Publication date: December 20, 2007
    Applicant: HITACHI METALS, LTD.
    Inventors: Yasunori Takaki, Hiroyuki Aoyama, Hiroto Ideno
  • Publication number: 20070279299
    Abstract: The chip antenna shown is provided with two chip antenna elements (the 1st chip antenna element 4, the 2nd chip antenna element 2). These chip antenna elements have the 1st magnetic base 10 and the 2nd magnetic base 8, and linear conductors 7 and 5 formed in the core, respectively. Magnetic base 10 and magnetic base 8 are separated. In the 1st chip antenna element 4, linear conductor 7 formed in the core of the 1st magnetic base 10 was formed to the end face of this magnetic base, and the end has protruded from said end face. On the other hand, in the 2nd chip antenna element 2, linear conductor 5 formed in the core of the 2nd magnetic base 8 has penetrated magnetic base 8. Furthermore, conductor 7 in the 1st chip antenna element and conductor 5 in the 2nd chip antenna element are electrically connected mutually in series by connection conductors 13 arranged among these chip antenna elements.
    Type: Application
    Filed: June 4, 2007
    Publication date: December 6, 2007
    Applicant: Hitachi Metals, Ltd.
    Inventors: Hiroyuki Aoyama, Hidetosi Hagiwara
  • Publication number: 20070236394
    Abstract: An antenna device is provided which is capable of operating in a wider band of frequencies (in a plurality of transmitting and receiving frequency bands), achieving an excellent gain, maintaining non-directivity of vertically polarized waves in each of the transmitting and receiving frequency bands, and saving space. The antenna device includes the first antenna 101 being a chip-type antenna operating in a GSM band, second antenna 102 being a pattern antenna operating in DCS and PCS bands, third antenna 103 being a layer-stacked antenna operating in an UMTS band, all being mounted on a substrate 100. The second antenna 102 is connected to a line 105 extending from a power feeding port 104 connected to the first antenna 101. A gap is interposed between the second antenna 102 and third antenna 103 wherein the second antenna 102 is capacitively coupled to the third antenna 103 on the substrate 100 with no antenna switch being provided.
    Type: Application
    Filed: March 19, 2007
    Publication date: October 11, 2007
    Applicant: HITACHI METALS, LTD.
    Inventors: Hiroyuki Aoyama, Kazuo Kazama
  • Publication number: 20070222689
    Abstract: The linear conductor 2 penetrates the magnetic base 1 along with the longitudinal direction of the magnetic base 1. The linear conductor 2 has a straight shape. The straight shape conductor 2 is installed so that it is surrounded by outside planes of the magnetic base 1, such as the side of a rectangular parallelepiped or a cylindrical peripheral face, and it penetrates both end sides of the magnetic base 1 in the longitudinal direction.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 27, 2007
    Applicant: Hitachi Metals, Ltd.
    Inventors: Hiroyuki Aoyama, Masayuki Gonda, Sigeo Fujii, Shuuichi Takano
  • Patent number: 7148851
    Abstract: An antenna device comprising (a) a mounting substrate having a ground portion and a non-ground portion, (b) a chip antenna mounted onto said non-ground portion, which comprises a substrate, a first radiation electrode formed on said substrate, a power-supplying electrode connected or not connected to the other end of said first radiation electrode, and a terminal electrode connected or not connected to one end of said first radiation electrode, and (c) at least one second radiation electrode formed in a conductor pattern on said non-ground portion, said second radiation electrode having one end connected or not connected to said terminal electrode and the other end which is an open end, and a cavity existing between said chip antenna and/or said second radiation electrode and said ground portion.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: December 12, 2006
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yasunori Takaki, Hiroyuki Aoyama
  • Patent number: 7061434
    Abstract: According to the present invention, a surface mount type chip antenna comprises a base made of a dielectric, magnetic substance or mixture thereof, at least one terminal portion provided on the mounted face of the base, a concave provided in the mounted face of the base except in the terminal portion, and at least one conductive wire wound around the base. Another feature is a surface mount type antenna device comprising a surface mount type chip antenna arranged in the vicinity of metallic functional components, and filter circuits connected to the power source side terminal of the metallic functional components.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: June 13, 2006
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hiroyuki Aoyama, Yasunori Takaki
  • Patent number: 7015862
    Abstract: The invention provides a small multimode antenna capable of commonly using a single feeding point at a plurality of frequencies. The antenna includes a radiating conductor 1 disposed above a ground conductor 6 and distributed-constant circuits 2 and 3 coupled to the radiating conductor. Each of the distributed-constant circuits is constructed by a transmission line and has a branch. One end of the radiating conductor and one end of the distributed-constant circuit 2 are connected to each other to be a connection point and, further, the other end of the radiating conductor and one end of the distributed-constant circuit 3 are connected to each other. The connection point is a single feeding point 9 using the ground conductor as an earth. The distributed-constant circuits 2 and 3 are designed as an equivalent circuit in which different stubs are connected in parallel with a transmission line, and impedance matching at a plurality of frequencies is realized at the feeding point.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: March 21, 2006
    Assignees: Hitachi, Ltd., Hitachi Metals, Ltd.
    Inventors: Ken Takei, Hiroyuki Aoyama
  • Publication number: 20050099337
    Abstract: The invention provides a small multimode antenna capable of commonly using a single feeding point at a plurality of frequencies. The antenna includes a radiating conductor 1 disposed above a ground conductor 6 and distributed-constant circuits 2 and 3 coupled to the radiating conductor. Each of the distributed-constant circuits is constructed by a transmission line and has a branch. One end of the radiating conductor and one end of the distributed-constant circuit 2 are connected to each other to be a connection point and, further, the other end of the radiating conductor and one end of the distributed-constant circuit 3 are connected to each other. The connection point is a single feeding point 9 using the ground conductor as an earth. The distributed-constant circuits 2 and 3 are designed as an equivalent circuit in which different stubs are connected in parallel with a transmission line, and impedance matching at a plurality of frequencies is realized at the feeding point.
    Type: Application
    Filed: July 30, 2004
    Publication date: May 12, 2005
    Inventors: Ken Takei, Hiroyuki Aoyama
  • Publication number: 20050078038
    Abstract: An antenna device comprising (a) a mounting substrate having a ground portion and a non-ground portion, (b) a chip antenna mounted onto said non-ground portion, which comprises a substrate, a first radiation electrode formed on said substrate, a power-supplying electrode connected or not connected to the other end of said first radiation electrode, and a terminal electrode connected or not connected to one end of said first radiation electrode, and (c) at least one second radiation electrode formed in a conductor pattern on said non-ground portion, said second radiation electrode having one end connected or not connected to said terminal electrode and the other end which is an open end, and a cavity existing between said chip antenna and/or said second radiation electrode and said ground portion.
    Type: Application
    Filed: August 6, 2004
    Publication date: April 14, 2005
    Inventors: Yasunori Takaki, Hiroyuki Aoyama
  • Patent number: 6873291
    Abstract: A surface-mounted antenna comprising a substrate made of a high-dielectric constant material having a dielectric constant ?r of 6 or more, a ribbon-shaped radiation electrode having one end which is grounded and the other end which is open, a grounding electrode connected or capacitance-coupled to one end of the radiation electrode, and a current-feeding electrode in a portal shape formed on a side surface separate from the radiation electrode with a gap; the current-feeding electrode having a current-feeding portion at one end, a grounding portion at the other end, and a portion substantially in alignment with the radiation electrode between them; and the length of the aligning portion, a gap width or a portal shape being able to be properly set such that capacitance owned by the current-feeding electrode and inductance can be adjusted for easily achieving impedance matching.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: March 29, 2005
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hiroyuki Aoyama, Keiko Kikuchi, Yasunori Takaki, Hidetoshi Hagiwara
  • Publication number: 20040183733
    Abstract: According to the present invention, a surface mount type chip antenna comprises a base made of a dielectric, magnetic substance or mixture thereof, at least one terminal portion provided on the mounted face of the base, a concave provided in the mounted face of the base except in the terminal portion, and at least one conductive wire wound around the base. Another feature is a surface mount type antenna device comprising a surface mount type chip antenna arranged in the vicinity of metallic functional components, and filter circuits connected to the power source side terminal of the metallic functional components.
    Type: Application
    Filed: March 19, 2004
    Publication date: September 23, 2004
    Inventors: Hiroyuki Aoyama, Yasunori Takaki
  • Patent number: 6639559
    Abstract: To provide an antenna element having a radiation electrode formed mainly on one surface of a dielectric substrate. The radiation electrode is substantially symmetric in form with respect to the center thereof, and has a first half and a second half with the same direction of main polarization of radiation emitted therefrom. Each of the halves of the radiation electrode may be a quarter-wave antenna for a wavelength of the emitted radiation. A power supply conductor to be connected to a high frequency signal source is connected to the first half of the radiation electrode, and a ground conductor to be connected to a ground is connected to the second half. A total impedance of the first half of the radiation electrode and the power supply conductor and a total impedance of the second half of the radiation electrode and the ground conductor can substantially match to one another, so that resonance between the halves of the radiation electrode can be enhanced and a wider bandwidth can be realized.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: October 28, 2003
    Assignees: Hitachi Ltd., Hitachi Metals Ltd.
    Inventors: Hiroshi Okabe, Eriko Takeda, Hiroyuki Aoyama, Keiko Kikuchi
  • Publication number: 20030006936
    Abstract: A surface-mounted antenna comprising a substrate made of a high-dielectric constant material having a dielectric constant ∈r of 6 or more, a ribbon-shaped radiation electrode having one end which is grounded and the other end which is open, a grounding electrode connected or capacitance-coupled to one end of the radiation electrode, and a current-feeding electrode in a portal shape formed on a side surface separate from the radiation electrode with a gap; the current-feeding electrode having a current-feeding portion at one end, a grounding portion at the other end, and a portion substantially in alignment with the radiation electrode between them; and the length of the aligning portion, a gap width or a portal shape being able to be properly set such that capacitance owned by the current-feeding electrode and inductance can be adjusted for easily achieving impedance matching.
    Type: Application
    Filed: June 14, 2002
    Publication date: January 9, 2003
    Applicant: HITACHI METALS, LTD.
    Inventors: Hiroyuki Aoyama, Keiko Kikuchi, Yasunori Takaki, Hidetoshi Hagiwara
  • Patent number: 6476767
    Abstract: A chip antenna element comprises (a) a radiation electrode formed on at least one surface of an insulating substrate, such that the radiation electrode extends from a first end of the substrate or its vicinity to a second end of the substrate or its vicinity, with a width decreasing substantially continuously and/or stepwise, thereby having a wide rear end on the side of the first end of the substrate and a narrow tip end on the side of the second end of the substrate, (b) a first grounding electrode connecting directly or via a gap to the rear end of the radiation electrode, (c) a second grounding electrode opposing the tip end of the radiation electrode via a gap, and (d) a feeding electrode formed on at least one surface of the substrate at a position facing an intermediate point of the radiation electrode, with or without contact with the radiation electrode.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: November 5, 2002
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hiroyuki Aoyama, Kenichi Tonomura, Keiko Kikuchi, Yuta Sugiyama
  • Patent number: 6452554
    Abstract: An antenna element comprises an insulating substrate; a first conductor layer formed continuously on an upper surface, a bottom surface and at least one side surface of the insulating substrate; a strip gap consisting of a portion in which a conductor layer is not formed on an upper surface and/or a side surface of the insulating substrate; and a second strip conductor layer formed in the slot or in an insulated extension connected to the strip gap thereby being electrically insulated from the first conductor layer, the second conductor layer being electrically connected to a feeder. The first conductor layer formed on an upper surface of the insulating substrate is divided by at least one slit gap extending substantially in perpendicular to the direction of electric current at a position separated from the strip gap.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: September 17, 2002
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hiroyuki Aoyama, Koji Fukamachi, Toshimasa Kawamura, Hiroshi Okabe, Ken Takei
  • Publication number: 20020126049
    Abstract: To provide an antenna element having a radiation electrode formed mainly on one surface of a dielectric substrate. The radiation electrode is substantially symmetric in form with respect to the center thereof, and has a first half and a second half with the same direction of main polarization of radiation emitted therefrom. Each of the halves of the radiation electrode may be a quarter-wave antenna for a wavelength of the emitted radiation. A power supply conductor to be connected to a high frequency signal source is connected to the first half of the radiation electrode, and a ground conductor to be connected to a ground is connected to the second half. A total impedance of the first half of the radiation electrode and the power supply conductor and a total impedance of the second half of the radiation electrode and the ground conductor can substantially match to one another, so that resonance between the halves of the radiation electrode can be enhanced and a wider bandwidth can be realized.
    Type: Application
    Filed: February 26, 2002
    Publication date: September 12, 2002
    Applicant: HITACHI LTD., HITACHI METALS, LTD.
    Inventors: Hiroshi Okabe, Eriko Takeda, Hiroyuki Aoyama, Keiko Kikuchi
  • Publication number: 20010050637
    Abstract: A chip antenna element comprises (a) a radiation electrode formed on at least one surface of an insulating substrate, such that the radiation electrode extends from a first end of the substrate or its vicinity to a second end of the substrate or its vicinity, with a width decreasing substantially continuously and/or stepwise, thereby having a wide rear end on the side of the first end of the substrate and a narrow tip end on the side of the second end of the substrate, (b) a first grounding electrode connecting directly or via a gap to the rear end of the radiation electrode, (c) a second grounding electrode opposing the tip end of the radiation electrode via a gap, and (d) a feeding electrode formed on at least one surface of the substrate at a position facing an intermediate point of the radiation electrode, with or without contact with the radiation electrode.
    Type: Application
    Filed: April 13, 2001
    Publication date: December 13, 2001
    Inventors: Hiroyuki Aoyama, Kenichi Tonomura, Keiko Kikuchi, Yuta Sugiyama
  • Patent number: 5808381
    Abstract: In the linear motor including (a) a plurality of permanent magnet members 1 fixed to a pair of ferromagnetic yokes 3 such that longitudinally adjacent magnetic poles have different polarities and that the magnetic poles of different polarities face each other via a magnetic gap 7, (b) a polyphase coil 2 disposed in the magnetic gap 7, either one of the polyphase coil 2 and the permanent magnet members 1 being caused to move relative to each other when the polyphase coil 2 is energized; and (c) a coil-supporting member 4 to which the polyphase coil 2 is fixed, the coil-supporting member 4 is made of non-magnetic ceramics having excellent heat conductivity and insulation.
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: September 15, 1998
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hiroyuki Aoyama, Yutaka Shimizu
  • Patent number: 5536983
    Abstract: A plurality of permanent magnets is disposed in a pair of yoke sections so that magnetic poles adjacent to each other and facing each other have opposite polarities. An armature coil is provided in a magnetic gap through which coil a electric current is made to flow to cause its relative movement with respect to the permanent magnets. A linear scale is provided on the stator so as to be located on the thrust center line or in the vicinity thereof, and a read head is provided on the movable member so as to face the linear scale.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: July 16, 1996
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hirokazu Araki, Hiroyuki Aoyama
  • Patent number: 5184085
    Abstract: A first high-voltage pulse generating circuit comprises a magnetic pulse compression circuit having a main saturable reactor provided with a reset circuit, the reset circuit being provided with a second saturable reactor for providing pulse voltage or current for setting a magnetic flux density of the main saturable reactor at a gate initiation point to a predetermined constant level. A second high-voltage pulse generating circuit comprises a magnetic pulse compression circuit having a main saturable reactor, a preset circuit for magnetizing the main saturable reactor to a saturation region thereof, and a set circuit for setting a magnetic flux density of the main saturable reactor at a gate initiation point to a predetermined constant level.
    Type: Grant
    Filed: April 22, 1992
    Date of Patent: February 2, 1993
    Assignee: Hitachi Metals, Ltd.
    Inventors: Shin Nakajima, Hiroyuki Aoyama, Rihito Kagawa, Osamu Shimoe