Patents by Inventor Masahiro TATEMATSU

Masahiro TATEMATSU 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: 11431071
    Abstract: A balun includes first to fourth lines and a stack. A plurality of first conductor layers forming the first and third lines are located in a first region in the stack. A plurality of second conductor layers forming the second and fourth lines are located in a second region in the stack. A ground conductor layer is located closer to the second region than to the first region. The plurality of second conductor layers include a conductor layer pair where a distance between two conductor layers is smallest.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: August 30, 2022
    Assignee: TDK CORPORATION
    Inventors: Yuta Ashida, Masahiro Tatematsu, Shuhei Sawaguchi, Shigemitsu Tomaki, Tetsuzo Goto, Takeshi Kijima
  • Publication number: 20220209380
    Abstract: A band-pass filter includes a first input/output port, a second input/output port, a plurality of resonators, and a multilayer stack. The multilayer stack includes a plurality of stacked dielectric layers. Each of the resonators is an open-ended resonator formed of a conductor line in the multilayer stack. Each of the resonators includes a resonator conductor portion including a first line part and a second line part located away from each other in a direction orthogonal to a stacking direction of the plurality of dielectric layers, and a third line part connecting the first line part and the second line part. The first to third line parts extend to surround a space between the first line part and the second line part.
    Type: Application
    Filed: December 20, 2021
    Publication date: June 30, 2022
    Applicant: TDK CORPORATION
    Inventors: Honoka ATSUCHI, Yuta ASHIDA, Longfei YI, Yoshinori MATSUMARU, Shuhei SAWAGUCHI, Masahiro TATEMATSU, Shigemitsu TOMAKI
  • Patent number: 11336018
    Abstract: An antenna includes: a dielectric layer including a first and second surface placed in layering; a ring-shaped conductor layer formed on the first surface; a first and second feedline that are closer to the first surface than the second, and are formed at positions different from those of the surfaces; a reference potential conductor layer formed on the second surface; and a conductor pin located in the inner diameter of the ring-shaped conductor layer in planar view from the direction of the layering, that is connected to the reference potential conductor layer. In the planar view, the first and second feedlines include portions overlapping with the ring-shaped conductor layer, and the extending directions of the feedlines intersect with each other. The ring-shaped conductor layer is connected to neither the reference potential conductor layer nor the conductor pin, and neither the first nor second feedline is connected to the conductor pin.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: May 17, 2022
    Assignee: TDK CORPORATION
    Inventors: Yuichi Kimura, Masahiro Tatematsu
  • Patent number: 11283147
    Abstract: A directional coupler includes first to fourth terminals, a first line, a second line, a ground conductor portion, and a stack. The first line includes a first center portion, a first connecting portion, and a second connecting portion. The second line includes a second center portion, a third connecting portion, and a fourth connecting portion. A distance between the first and third connecting portions and a distance between the second and fourth connecting portions decrease toward the first and second center portions. The first to fourth terminals are located on a bottom surface of the stack.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: March 22, 2022
    Assignee: TDK CORPORATION
    Inventors: Yuta Ashida, Masahiro Tatematsu, Shuhei Sawaguchi, Shigemitsu Tomaki
  • Publication number: 20210344320
    Abstract: A band-pass filter includes an unbalanced port, a first balanced port, a second balanced port, and first to third resonators provided between the unbalanced port and the first and second balanced ports. The second resonator and the third resonator each are a resonator with both ends open. The second resonator and the third resonator are adjacent to each other in a circuit configuration, and electromagnetically coupled by magnetic coupling as main coupling. The first resonator is provided closer to the second resonator than to the third resonator, and jump-coupled to the third resonator.
    Type: Application
    Filed: April 27, 2021
    Publication date: November 4, 2021
    Applicant: TDK CORPORATION
    Inventors: Shuhei SAWAGUCHI, Yuta ASHIDA, Masahiro TATEMATSU, Yoshinori MATSUMARU, Shigemitsu TOMAKI
  • Publication number: 20210242852
    Abstract: A balun includes first to fourth lines and a stack. A plurality of first conductor layers forming the first and third lines are located in a first region in the stack. A plurality of second conductor layers forming the second and fourth lines are located in a second region in the stack. A ground conductor layer is located closer to the second region than to the first region. The plurality of second conductor layers include a conductor layer pair where a distance between two conductor layers is smallest.
    Type: Application
    Filed: January 28, 2021
    Publication date: August 5, 2021
    Applicant: TDK CORPORATION
    Inventors: Yuta ASHIDA, Masahiro TATEMATSU, Shuhei SAWAGUCHI, Shigemitsu TOMAKI, Tetsuzo GOTO, Takeshi KIJIMA
  • Publication number: 20210234249
    Abstract: A directional coupler includes first to fourth terminals, a first line, a second line, a ground conductor portion, and a stack. The first line includes a first center portion, a first connecting portion, and a second connecting portion. The second line includes a second center portion, a third connecting portion, and a fourth connecting portion. A distance between the first and third connecting portions and a distance between the second and fourth connecting portions decrease toward the first and second center portions. The first to fourth terminals are located on a bottom surface of the stack.
    Type: Application
    Filed: January 22, 2021
    Publication date: July 29, 2021
    Applicant: TDK CORPORATION
    Inventors: Yuta ASHIDA, Masahiro TATEMATSU, Shuhei SAWAGUCHI, Shigemitsu TOMAKI
  • Publication number: 20210194134
    Abstract: An antenna includes: a dielectric layer including a first and second surface placed in layering; a ring-shaped conductor layer formed on the first surface; a first and second feedline that are closer to the first surface than the second, and are formed at positions different from those of the surfaces; a reference potential conductor layer formed on the second surface; and a conductor pin located in the inner diameter of the ring-shaped conductor layer in planar view from the direction of the layering, that is connected to the reference potential conductor layer. In the planar view, the first and second feedlines include portions overlapping with the ring-shaped conductor layer, and the extending directions of the feedlines intersect with each other. The ring-shaped conductor layer is connected to neither the reference potential conductor layer nor the conductor pin, and neither the first nor second feedline is connected to the conductor pin.
    Type: Application
    Filed: December 21, 2020
    Publication date: June 24, 2021
    Applicant: TDK CORPORATION
    Inventors: Yuichi KIMURA, Masahiro TATEMATSU