Patents by Inventor Osamu Tasaki

Osamu Tasaki 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: 10168208
    Abstract: A signal detected by a photomultiplier tube is pre-amplified and converted into a digital signal. A time average value of signal components, each of which has a voltage lower than a predetermined base threshold value, is calculated as a base voltage. A signal that has been subjected to base correction processing is subjected to threshold value processing and to base correction processing in a non-incident state in which light is not incident on the photomultiplier tube. An output signal thereof is subjected to dark current calculation processing; and a light emission signal amount is calculated by subtracting, from the signal component of the detection light obtained by the threshold value processing, a time average value of the signal components of the dark current. As the result, discriminating the dark current pulse from floor noises enhances the accuracy of the base voltage, and thus the accuracy of light detection.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: January 1, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yutaka Kasai, Fujio Onishi, Osamu Tasaki, Hidetsugu Tanoue, Kazuhiro Tanaka
  • Publication number: 20180066986
    Abstract: A signal detected by a photomultiplier tube is pre-amplified and converted into a digital signal. A time average value of signal components, each of which has a voltage lower than a predetermined base threshold value, is calculated as a base voltage. A signal that has been subjected to base correction processing is subjected to threshold value processing and to base correction processing in a non-incident state in which light is not incident on the photomultiplier tube. An output signal thereof is subjected to dark current calculation processing; and a light emission signal amount is calculated by subtracting, from the signal component of the detection light obtained by the threshold value processing, a time average value of the signal components of the dark current. As the result, discriminating the dark current pulse from floor noises enhances the accuracy of the base voltage, and thus the accuracy of light detection.
    Type: Application
    Filed: March 16, 2016
    Publication date: March 8, 2018
    Inventors: Yutaka KASAI, Fujio ONISHI, Osamu TASAKI, Hidetsugu TANOUE, Kazuhiro TANAKA
  • Patent number: 9214733
    Abstract: Provided is an antenna device including a substrate, a metal chassis disposed adjacent a rear surface of the substrate, multiple patch antenna elements formed in an array on a front surface of the substrate, feeding lines formed on the front surface of the substrate and through which electricity is fed to the multiple patch antenna elements, and a ground conductor formed on the rear surface of the substrate in a portion opposite the feeding lines.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: December 15, 2015
    Assignee: Hitachi Cable, Ltd.
    Inventors: Osamu Tasaki, Tomoyuki Ogawa, Shinsuke Murano
  • Patent number: 8798679
    Abstract: A mobile communication base station antenna has a plurality of polarization diversity antenna blocks, each of the polarization diversity antenna blocks including a plurality of polarization diversity antenna elements, each of the polarization diversity antenna elements including antenna elements that are disposed to be orthogonal to each other. The polarization diversity antenna elements of one of the polarization diversity antenna blocks are interposed between the polarization diversity antenna elements of another one of the polarization diversity antenna blocks, and tilt angles in the vertical plane of the respective polarization diversity antenna blocks are different from each other.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: August 5, 2014
    Assignee: Hitachi Metals, Ltd.
    Inventors: Takayuki Shimizu, Shinsuke Murano, Osamu Tasaki
  • Patent number: 8633862
    Abstract: A mobile communication base station antenna has a first array antenna and a second array antenna. Antenna elements of the first and second array antennas are classified into the first, second and third groups G1, G2 and G3. A first feeding port is connected to the antenna elements in the odd number groups (the first group G1 and the third group G3) of the first array antenna and the antenna elements in the even number group of the second array antenna. On the other hand, a second feeding port is connected to the antenna elements in the even number group (the second group G2) of the first array antenna and the antenna elements in the odd number groups (the first group G1 and the third group G3) of the second array antenna.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: January 21, 2014
    Assignee: Hitachi Cable, Ltd.
    Inventors: Osamu Tasaki, Tomoyuki Ogawa, Takayuki Shimizu, Shinsuke Murano, Ryota Suzuki
  • Publication number: 20130314284
    Abstract: Provided is an antenna device including a substrate, a metal chassis disposed adjacent a rear surface of the substrate, multiple patch antenna elements formed in an array on a front surface of the substrate, feeding lines formed on the front surface of the substrate and through which electricity is fed to the multiple patch antenna elements, and a ground conductor formed on the rear surface of the substrate in a portion opposite the feeding lines.
    Type: Application
    Filed: March 14, 2013
    Publication date: November 28, 2013
    Applicant: Hitachi Cable, Ltd.
    Inventors: Osamu Tasaki, Tomoyuki Ogawa, Shinsuke Murano
  • Publication number: 20130271344
    Abstract: An antenna device includes a substrate including a front surface, a back surface, and via holes formed therein, a plurality of patch antenna elements formed in an array on the front surface of the substrate, a feed line formed on the back surface of the substrate to feed the plurality of patch antenna elements through the via holes formed in the substrate, and a metal chassis disposed opposite the substrate with an air layer therebetween on the back surface of the substrate. The metal chassis is electrically grounded.
    Type: Application
    Filed: March 7, 2013
    Publication date: October 17, 2013
    Applicant: Hitachi Cable, Ltd.
    Inventors: Osamu TASAKI, Tomoyuki Ogawa, Shinsuke Murano
  • Publication number: 20120115548
    Abstract: A mobile communication base station antenna has two array antennas juxtaposed in a horizontal direction. Each of the array antennas includes a plurality of antenna element pairs arranged in a vertical direction. Each of the antenna element pairs includes two antenna elements having polarization characteristics perpendicular to each other. A shield plate is provided between the two array antennas. The plurality of antenna element pairs of each of the two array antennas are classified into a first group of M-antenna element pairs, a second group of N-antenna element pairs, and a third group of P-antenna element pairs from one end to another end of the two array antennas (M, N, and P are positive integers, respectively).
    Type: Application
    Filed: March 11, 2011
    Publication date: May 10, 2012
    Applicant: HITACHI CABLE, LTD.
    Inventors: Takayuki Shimizu, Shinsuke Murano, Ryota Suzuki, Osamu Tasaki, Tomoyuki Ogawa
  • Publication number: 20120062440
    Abstract: A mobile communication base station antenna has a first array antenna and a second array antenna. Antenna elements of the first and second array antennas are classified into the first, second and third groups G1, G2 and G3. A first feeding port is connected to the antenna elements in the odd number groups (the first group G1 and the third group G3) of the first array antenna and the antenna elements in the even number group of the second array antenna. On the other hand, a second feeding port is connected to the antenna elements in the even number group (the second group G2) of the first array antenna and the antenna elements in the odd number groups (the first group G1 and the third group G3) of the second array antenna.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 15, 2012
    Applicant: HITACHI CABLE, LTD.
    Inventors: Osamu TASAKI, Tomoyuki OGAWA, Takayuki SHIMIZU, Shinsuke MURANO, Ryota SUZUKI
  • Publication number: 20100227647
    Abstract: A mobile communication base station antenna has a plurality of polarization diversity antenna blocks, each of the polarization diversity antenna blocks including a plurality of polarization diversity antenna elements, each of the polarization diversity antenna elements including antenna elements that are disposed to be orthogonal to each other. The polarization diversity antenna elements of one of the polarization diversity antenna blocks are interposed between the polarization diversity antenna elements of another one of the polarization diversity antenna blocks, and tilt angles in the vertical plane of the respective polarization diversity antenna blocks are different from each other.
    Type: Application
    Filed: March 2, 2010
    Publication date: September 9, 2010
    Applicant: HITACHI CABLE, LTD.
    Inventors: Takayuki Shimizu, Shinsuke Murano, Osamu Tasaki
  • Publication number: 20100227646
    Abstract: A mobile communication base station antenna has a plurality of array antennas. Each of the array antennas has an antenna element pair array including a plurality of antenna element pairs arranged in a vertical plane. Each of the antenna element pairs has two antenna elements having polarization characteristics orthogonal to each other. Two feeding points are provided for feeding an electric power to the two antenna elements respectively. The array antennas are arranged in a vertical plane, and the antenna element pairs included in one of the array antennas and the antenna element pairs included in other of the array antennas are arranged alternately, at least in a part between the array antennas adjacent to each other.
    Type: Application
    Filed: March 2, 2010
    Publication date: September 9, 2010
    Applicant: HITACHI CABLE, LTD.
    Inventors: Tomoyuki Ogawa, Shinsuke Murano, Osamu Tasaki, Takayuki Shimizu