Patents by Inventor Yusuke Uemichi

Yusuke Uemichi 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: 11843156
    Abstract: An aspect of the present invention simplifies a method of manufacturing a mode converter. A mode converter (10) includes: a post-wall waveguide (PW); a microstrip line (MS); and a blind via (BV) configured to carry out conversion between a waveguide mode of the post-wall waveguide (PW) and a waveguide mode of the microstrip line (MS), the blind via (BV) having a shape approximated by a shape obtained by combining a plurality of cylinders (C1 to C4), each of the plurality of cylinders (C1 to C4) having a diameter equal to the diameter of through vias 14i.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: December 12, 2023
    Assignee: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20230282952
    Abstract: This invention can reduce the size of a filter device as compared to a conventional filter device having the same coupling degree. A filter device (1) includes: a substrate (11); strip-shaped conductors (12a1 to 12a5); and a ground conductor layer (13), an area facing an area interposed between adjacent ones of the strip-shaped conductors (between 12a1 and 12a2 and between 12a2 and 12a3) having a first recessed portion (recessed portions 11a1 and 11a2) having a surface covered with the ground conductor layer (13).
    Type: Application
    Filed: March 22, 2021
    Publication date: September 7, 2023
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20230216165
    Abstract: An object of this invention is to reduce the size of a filter device. Provided is a filter device (1) including: a substrate (11) including a first main surface and a second main surface (111, 112); strip-shaped conductors (12a1 to 12a5) provided to the first main surface (111); and a ground conductor layer (13) provided at least to the second main surface (112), the second main surface (112) having a recessed portion (11ai) provided for each strip-shaped conductor (12ai), the recessed portion (11ai) overlapping the strip-shaped conductor (12ai) in plan view and having a surface covered with the ground conductor layer (13).
    Type: Application
    Filed: March 22, 2021
    Publication date: July 6, 2023
    Applicant: Fujikura Ltd.
    Inventor: Yusuke Uemichi
  • Publication number: 20220255209
    Abstract: Provided is a mode converter that is capable of making the reflection coefficient at the center frequency of the operation band lower than conventional ones. A mode converter (10) includes: a post-wall waveguide (PW); a microstrip line (MS); and a blind via (BV) which is configured to carry out conversion between a guide mode of the post-wall waveguide (PW) and a guide mode of the microstrip line (MS). The blind via (BV) has a tapered shape such that a cross section decreases with increasing distance from the microstrip line (MS), and the slope (?) of a lateral surface of the blind via (BV) is not less than 5.5°.
    Type: Application
    Filed: May 29, 2020
    Publication date: August 11, 2022
    Applicant: Fujikura Ltd.
    Inventor: Yusuke Uemichi
  • Publication number: 20220231390
    Abstract: A mode converter which converts between a mode of a post-wall waveguide and a mode of a line in which a strip-shaped conductor is formed on another substrate different from a substrate of the post-wall waveguide, is less likely to cause a transmission failure resulting from a change in environmental temperature. A mode converter (10) includes: a post-wall waveguide (PW) in which an opening (121) is provided in a wide wall (conductor layer 12); a dielectric substrate (15) having a main surface on which a strip-shaped conductor (16) is formed; and a joining member (solder 18) joining the wide wall (conductor layer 12) and the substrate (15), wherein in a plan view, the opening (121) and the strip-shaped conductor (16) overlap each other.
    Type: Application
    Filed: June 5, 2020
    Publication date: July 21, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20220209382
    Abstract: A filter device having desired characteristics is easily designed. The filter device includes a post-wall waveguide functioning as a resonator group including five congruent resonators (R1 to R5). The resonators (R1, R2) include therein respective control posts (CP1, CP2), and a shortest distance (di) from the control post (CPi) to a narrow wall of the resonator (Ri) satisfies d1>d2. The resonators (R4, R5) include therein respective control posts (CP4, CP5), and a shortest distance (dj) from the control post (CPj) to a narrow wall of the resonator (Rj) satisfies d4<d5.
    Type: Application
    Filed: April 27, 2020
    Publication date: June 30, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Patent number: 11342648
    Abstract: A transmission line in which a waveguide tube and a planar transmission path are coupled to a post-wall waveguide broadens a band in which return loss is small. A transmission line (1) includes: a PPW (filter 11) including wide walls (13, 14) and narrow walls (16); and a waveguide tube (21). The PPW (filter 11) includes a columnar conductor (pin 18) that passes through an opening (13a) which is provided in the wide wall (conductor layer 13) and that has one end portion (181) located inside the substrate (12). The waveguide tube (21) is placed such that the columnar conductor (pin 18) passes through an opening (22a) and such that another end portion (182) of the columnar conductor (pin 18) is located inside the waveguide tube (21).
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: May 24, 2022
    Assignee: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20220158321
    Abstract: An aspect of the present invention simplifies a method of manufacturing a mode converter. A mode converter (10) includes: a post-wall waveguide (PW); a microstrip line (MS); and a blind via (BV) configured to carry out conversion between a waveguide mode of the post-wall waveguide (PW) and a waveguide mode of the microstrip line (MS), the blind via (BV) having a shape approximated by a shape obtained by combining a plurality of cylinders (C1 to C4), each of the plurality of cylinders (C1 to C4) having a diameter equal to the diameter of through vias 14i.
    Type: Application
    Filed: April 28, 2020
    Publication date: May 19, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20220158316
    Abstract: A filter that makes it easy to adjust a center frequency of a passband is implemented. The filter (1) includes a post-wall waveguide (11) functioning as a plurality of resonators (11a to 11e) that are electromagnetically coupled to each other and cavities (12a to 12e) stacked on the post-wall waveguide (11). The cavities (12a to 12e) are electromagnetically coupled with resonators (11a to 11e) via coupling windows (112a to 112e) formed in a broad wall (first broad wall (112)) of the post-wall waveguide (11).
    Type: Application
    Filed: March 6, 2020
    Publication date: May 19, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20220131249
    Abstract: Provided is a filter capable of compensating property change caused due to temperature change. A filter (1) includes a post-wall waveguide serving as electromagnetically coupled resonators (201-205) and cavities (301a-305a) electromagnetically coupled to the resonators (201-205) via coupling windows (AP101a-AP105a) in a second conductor layer (6a) of the post-wall waveguide. A substrate (5) of the post-wall waveguide includes a first dielectric layer constituted by a first dielectric material, and a second dielectric layer (9a) constituted by a second dielectric material is provided inside the cavities (301a-305a). In the filter (1), a dielectric constant of the first dielectric material increases and a dielectric constant of the second dielectric material decreases due to the same range of temperature rise, or the dielectric constant of the first dielectric material decreases and the dielectric constant of the second dielectric material increases due to the same range of temperature rise.
    Type: Application
    Filed: March 6, 2020
    Publication date: April 28, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20220131248
    Abstract: Provided is a filter device that includes a post-wall waveguide and that has a variable passband. This filter device (1) includes: a post-wall waveguide (filter main body 1M) that functions as a plurality of resonators (10 to 50); cavities (cylinders 551 to 555) coupled to the respective resonators (10 to 50) via openings (AP1 to AP5) formed in a broad wall (conductor layer 2); rods (61 to 65) inserted into the cavities (cylinders 551 to 555); and a rod control mechanism (piezoelectric element 6P) that controls the positions of the rods (61 to 65).
    Type: Application
    Filed: March 11, 2020
    Publication date: April 28, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20220085479
    Abstract: An aspect of the present invention is to reduce return loss in a mode converter. A mode converter (10) includes an excitation pin (through via TV) configured to carry out mutual conversion between a waveguide mode of a post-wall waveguide (PW) and a waveguide mode of a microstrip line (MS). The mode conductor includes a pair of wide walls (conductor layers 12 and 13), in which first and second anti-pads (anti-pads 12c, 13c) are formed, respectively. The first and second anti-pads each have an inner edge including the excitation pin and each have an outer size (diameter D12) that is more than 5 times and less than 6 times as large as the diameter (DT) of the excitation pin.
    Type: Application
    Filed: April 27, 2020
    Publication date: March 17, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20220029260
    Abstract: The present invention achieves a filter that makes it possible to easily adjust a center frequency of a pass band. A filter (1) includes a post-wall waveguide (11) functioning as a resonator group consisting of a plurality of resonators (11a to 11e) that are electromagnetically coupled to each other. The post-wall waveguide (11) has a broad wall (first broad wall 112) that is provided with openings (112a to 112e) which allow opening of at least one resonator (11a to 11e) belonging to the resonator group. These openings (112a to 112e) are used to adjust a center frequency of a pass band of the filter (1).
    Type: Application
    Filed: March 9, 2020
    Publication date: January 27, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20220013880
    Abstract: An aspect of the present invention reduces loss that may occur in cases where electromagnetic waves are guided from one main surface side of a substrate to the other main surface side of the substrate. A waveguide device (10, 10A, 20) includes: a substrate (11); a first conductor layer (12A) and a second conductor layer (12B) which are provided on both main surfaces of the substrate, respectively; a main conductor post (MP) which penetrates between the both main surfaces; and one or more sub-conductor posts (SP) which penetrate between the both main surfaces and which, together with the main conductor post, guide a TEM mode or a quasi-TEM mode.
    Type: Application
    Filed: April 7, 2020
    Publication date: January 13, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Publication number: 20220013877
    Abstract: Provided is a switch device that can be used in a millimeter wave band and that can exhibit both low loss and high isolation characteristics. This switch device (1) includes: a post-wall waveguide (filter main body 1M) in which openings (AP1 to AP5) are formed in a broad wall (conductor layer 2); a cover (5) including a portion that blocks the openings (AP1 to AP5), the portion being made of an electrically conductive material; and a cover control mechanism (actuator 6) that switches between a first state in which the openings (AP1 to AP5) are blocked by the cover (5) and a second state in which the openings (AP1 to AP5) are open.
    Type: Application
    Filed: March 10, 2020
    Publication date: January 13, 2022
    Applicant: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Patent number: 11196140
    Abstract: A directional coupler 1 includes: a first waveguide 31 and a second waveguide 32 that are arranged in parallel with post arrays 23 and 24 therebetween; a coupling window 33 that is formed in the post arrays 23 and 24 and electromagnetically couples the first waveguide 31 and the second waveguide 32; and a projecting conductor 50 that projects, at a center in a width direction of the coupling window 33, from one conductive layer 13 of paired conductive layers 12 and 13 facing each other in the first waveguide 31 and the second waveguide 32, toward an inside of the coupling window 33, the projecting conductor 50 being spaced from the other conductive layer 12.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: December 7, 2021
    Assignee: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Patent number: 11189897
    Abstract: Designing a filter with desired characteristics is made easy. A filter (1) includes a plurality of resonators (10 to 50) which are electromagnetically coupled. The plurality of resonators (10 to 50) each have a broad wall (11, 12, 21, 22, 31, 32, 41, 42, 51, 52) that is in a shape of a circle or a regular polygon with six or more vertices, and two resonators, which are coupled together, of the plurality of resonators (10 to 50) are arranged such that D<R1+R2 is satisfied, where R1 and R2 represent radii of circumcircles of the broad walls of the two resonators and D represents a center-to-center distance between the two resonators.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: November 30, 2021
    Assignee: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Patent number: 11158919
    Abstract: An object of the present invention is to prevent or reduce an error between a center frequency and a target center frequency in a coupled resonator band-pass filter which uses a post-wall waveguide. A band-pass filter (1) includes: a substrate (2) made of a dielectric substrate and sandwiched by a pair of conductor layers (3 and 4); and a post wall (11, 12) constituted by a plurality of conductor posts (11i, 12i) which pass through the substrate (2) and short-circuit the pair of conductor layers (3 and 4), the pair of conductor layers (3 and 4) and the post wall (11, 12) constituting a plurality of resonators (22 to 24) which are coupled, the pair of conductor layers serving as a pair of wide walls of the plurality of resonators, the post wall serving as a narrow wall of the plurality of resonator.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: October 26, 2021
    Assignee: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Patent number: 11121443
    Abstract: Realized is a post-wall waveguide bandpass filter in which a bypass phenomenon is less likely to occur. In a post-wall waveguide bandpass filter (1) including an input part (10a) and an output part (10b), each of a first distance (distance X11), a second distance (not illustrated in FIG. 2), a third distance (distance X21), and a fourth distance (not illustrated in FIG. 2) is not more than 1.5 times a post interval (d).
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: September 14, 2021
    Assignee: FUJIKURA LTD.
    Inventor: Yusuke Uemichi
  • Patent number: 11121695
    Abstract: A diplexer (100) includes: first and second directional couplers (106A, 106B); and first and second filters (101A, 101B). The filters (101A, 101B) each include a plurality of resonators (110A to 150A, 110B to 150B) that are electromagnetically coupled. The resonators (110A to 150A, 110B to 150B) each have a broad wall that is in a shape of a circle or a regular polygon with six or more vertices, and two resonators, which are coupled together, of the resonators (110A to 150A, 110B to 150B) are arranged such that D<R1+R2 is satisfied, where R1 and R2 represent radii of circumcircles of the broad walls of the two resonators and D represents a center-to-center distance between the two resonators.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: September 14, 2021
    Assignee: FUJIKURA LTD.
    Inventor: Yusuke Uemichi