Patents by Inventor Keishi Kosaka

Keishi Kosaka 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: 11862877
    Abstract: An antenna includes antenna elements provided one by one on the respective sides of a substantially rectangular conductor plate. Each of the antenna elements includes a feeding wire and a split ring conductor having a shape in which a ring is partially cut by a split part. The feeding wire is electrically connected to the split ring conductor and extends in a direction across a region formed inside the split ring conductor. Two antenna elements provided on two arbitrary sides facing each other of the conductor plate among the four antenna elements are each supplied with power through the feeding wire included in each antenna element so as to have substantially the same direction of an electric field in a polarization direction.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: January 2, 2024
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keishi Kosaka, Hiroshi Toyao, Eiji Hankui, Yasuhiko Matsunaga
  • Patent number: 11843159
    Abstract: A split ring resonator includes a first conductive member having a split ring shape, a second conductive member, and a third conductive member. The second and third conductive members have a split therebetween and are electrically connected with different ends of the first conductive member. The second conductive member includes a first portion belonging to a first layer substantially parallel to a plane to which the first conductive member belongs, a second portion belonging to a second layer substantially parallel to the plane and facing the first layer, and a third portion electrically connecting the first and second portions. The third conductive member includes fourth and fifth portion respectively belonging to the first and second layers, and a sixth portion electrically connecting the fourth and fifth portions. At least parts of the first and fifth portions face each other in a direction substantially perpendicular to the plane.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: December 12, 2023
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keishi Kosaka, Yasuhiko Matsunaga, Eiji Hankui, Hiroshi Toyao
  • Publication number: 20230178903
    Abstract: An antenna device comprises a plurality of antennas. The antennas include first antennas which form a first array and second antennas which form a second array. The first antennas include two first predetermined antennas arranged along a first line. A longitudinal direction of one of the first predetermined antennas and another longitudinal direction of a remaining one of the first predetermined antennas intersect with each other and define a horizontal plane. Each first antenna mainly radiates a horizontally polarized wave which is in parallel to the horizontal plane. Each second antenna mainly radiates a vertically polarized wave which is perpendicular to the horizontal plane. The second antennas include two second predetermined antennas arranged along a second line. When the first and second lines are projected onto the horizontal plane along a direction perpendicular to the horizontal plane, the first and second lines intersect with each other.
    Type: Application
    Filed: October 25, 2022
    Publication date: June 8, 2023
    Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Eiji HANKUI, Keishi KOSAKA, Hiroshi TOYAO
  • Patent number: 11658372
    Abstract: A transmission line having, for example, a first frequency-selecting surface.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: May 23, 2023
    Assignee: NEC CORPORATION
    Inventor: Keishi Kosaka
  • Patent number: 11626664
    Abstract: Antenna has a split ring resonator. Moreover, the antenna is provided with a first conductor and a second conductor which form, at least in part, an open stub or a short stub which has a predetermined electrical length. With this structure, the antenna can have a plurality of operating frequencies.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: April 11, 2023
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keishi Kosaka, Hiroshi Toyao
  • Patent number: 11552399
    Abstract: A split-ring resonator comprises a first ground terminal which is separated from a ground pattern.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: January 10, 2023
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keishi Kosaka, Eiji Hankui, Hiroshi Toyao, Yasuhiko Matsunaga
  • Patent number: 11545755
    Abstract: Provided is a conductor, for example, equipped with a split-ring resonator, and an opening, wherein a split in the split-ring resonator and the opening are spatially continuous.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: January 3, 2023
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Eiji Hankui, Hiroshi Toyao, Keishi Kosaka
  • Patent number: 11476580
    Abstract: An antenna includes a split-ring conductive portion and a ring-inside conductive portion. The split-ring conductive portion is positioned outside a region and is positioned in an area which extends along an outline of the region except for a split. The ring-inside conductive portion is positioned inside the region. The ring-inside conductive portion is continuous with one of parts of the split-ring conductive portion, the split being put between the parts of the split-ring conductive portion. At least a part of the ring-inside conductive portion is bent so as to extend parallel to the split-ring conductive portion.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: October 18, 2022
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Tatsuya Soma, Keishi Kosaka
  • Patent number: 11431098
    Abstract: An object is to advantageously control a phase of an electromagnetic wave with high efficiency at target operational frequency band. A phase control device (10) comprising a two-dimensional array of three-dimensional units (101) and configured to shift a phase of an electromagnetic wave passing through the three-dimensional units (101). The two nearest three-dimensional units (101) having same phase shift coverage are configured such that the distance difference from phase center of the phase control device (10) to the units (101) is a wavelength of a reference frequency fk, and the reference frequency fk is higher than center frequency fc of operational frequency band and not higher than the highest frequency fh of the operational frequency band.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: August 30, 2022
    Assignee: NEC CORPORATION
    Inventors: Mingqi Wu, Keishi Kosaka, Eiji Hankui
  • Publication number: 20220271429
    Abstract: A multi-resonant antenna is provided with a main antenna and an additional radiation element. The main antenna is provided with a main portion, which forms a split ring, and a feeding portion, which branches off from the main portion. The additional radiation element extends outward of the main antenna from the main antenna.
    Type: Application
    Filed: January 11, 2022
    Publication date: August 25, 2022
    Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventor: Keishi KOSAKA
  • Patent number: 11380997
    Abstract: An antenna comprises a split ring resonator. The antenna has a main portion, a feeding portion and at least one radiation element. The main portion forms a split ring. The feeding portion is provided on the main portion. The radiation element extends from the main portion.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: July 5, 2022
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventor: Keishi Kosaka
  • Publication number: 20220123474
    Abstract: An antenna includes antenna elements provided one by one on the respective sides of a substantially rectangular conductor plate. Each of the antenna elements includes a feeding wire and a split ring conductor having a shape in which a ring is partially cut by a split part. The feeding wire is electrically connected to the split ring conductor and extends in a direction across a region formed inside the split ring conductor. Two antenna elements provided on two arbitrary sides facing each other of the conductor plate among the four antenna elements are each supplied with power through the feeding wire included in each antenna element so as to have substantially the same direction of an electric field in a polarization direction.
    Type: Application
    Filed: October 29, 2019
    Publication date: April 21, 2022
    Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keishi KOSAKA, Hiroshi TOYAO, Eiji HANKUI, Yasuhiko MATSUNAGA
  • Patent number: 11245195
    Abstract: The present invention provides a phase control plate including n layers (n?4) of overlapping admittance sheets (10-1 to 10-6) each of which includes a plurality of plane unit cells, in which an admittance of a first plane unit cell included in an admittance sheet in a layer a (1?a?n) and an admittance of a second plane unit cell being included in an admittance sheet in a layer b (1?b?n and b?a) and overlapping the first plane unit cell are different from each other.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: February 8, 2022
    Assignee: NEC CORPORATION
    Inventors: Yoshiaki Kasahara, Eiji Hankui, Hiroshi Toyao, Keishi Kosaka, Mingqi Wu
  • Publication number: 20220029269
    Abstract: A split ring resonator includes a first conductive member having a split ring shape, a second conductive member, and a third conductive member. The second and third conductive members have a split therebetween and are electrically connected with different ends of the first conductive member. The second conductive member includes a first portion belonging to a first layer substantially parallel to a plane to which the first conductive member belongs, a second portion belonging to a second layer substantially parallel to the plane and facing the first layer, and a third portion electrically connecting the first and second portions. The third conductive member includes fourth and fifth portion respectively belonging to the first and second layers, and a sixth portion electrically connecting the fourth and fifth portions. At least parts of the first and fifth portions face each other in a direction substantially perpendicular to the plane.
    Type: Application
    Filed: March 9, 2020
    Publication date: January 27, 2022
    Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keishi KOSAKA, Yasuhiko MATSUNAGA, Eiji HANKUI, Hiroshi TOYAO
  • Publication number: 20220029296
    Abstract: An antenna includes a conductor plate, for example. The conductor plate has a slot and a branch slot, wherein the branch slot has one end connected to the slot and another end which, when viewed from the one end, extends along the slot in an antinode direction of an electric field at the lowest-order resonant frequency of the antenna, and is closed in the conductor plate.
    Type: Application
    Filed: December 6, 2019
    Publication date: January 27, 2022
    Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keishi KOSAKA, Hiroshi TOYAO, Eiji HANKUI, Yasuhiko MATSUNAGA
  • Publication number: 20210328335
    Abstract: Provided is an antenna element resistant to loss of electrical performance even when water droplets become attached thereto. The antenna element of the present invention is provided with a conductor portion and is characterized in that, at a location on a surface of the conductor portion in which the field intensity during operation is stronger than in other locations, a first dielectric having a thickness of not less than 0.005? is formed, wherein ? is the vacuum wavelength of the electromagnetic waves of an antenna operation frequency.
    Type: Application
    Filed: May 13, 2019
    Publication date: October 21, 2021
    Applicant: NEC Corporation
    Inventors: Keishi KOSAKA, Eiji HANKUI
  • Patent number: D976882
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: January 31, 2023
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keishi Kosaka, Takeshi Ebisawa
  • Patent number: D976883
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: January 31, 2023
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Mariko Koyama, Keishi Kosaka, Yasuhiko Matsunaga, Hiroshi Toyao, Takeshi Ebisawa, Osamu Hashiguchi, Eiji Hankui
  • Patent number: D976884
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: January 31, 2023
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Mariko Koyama, Keishi Kosaka, Hiroshi Toyao, Yasuhiko Matsunaga, Eiji Hankui, Osamu Hashiguchi, Takeshi Ebisawa
  • Patent number: D993943
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: August 1, 2023
    Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED
    Inventors: Keishi Kosaka, Takeshi Ebisawa