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公开(公告)号：US12040765B1
公开(公告)日：2024-07-16
申请号：US18018147
申请日：2022-08-05
Applicant: Fujikura Ltd.
Inventor： Yusuke Uemichi
IPC: H03H11/16
CPC classification number: H03H11/16
Abstract: A digital phase shifter includes: a plurality of digital phase shift circuits connected in a cascade manner, wherein each of the plurality of digital phase shift circuits includes a signal line, two inner lines provided on two sides of the signal line, two outer lines provided on outer sides of the inner lines, a first grounding conductor connected to one end of each of the inner lines and the outer lines, a second grounding conductor connected to other ends of the outer lines, and two electronic switches provided between other ends of the inner lines and the second grounding conductor, and is set to a low-delay mode in which return currents flow in the inner lines or a high-delay mode in which return currents flow in the outer lines, and wherein the digital phase shifter includes: a phase shift quantity moderator that moderates unevenness of a phase shift quantity of an uneven digital phase shift circuit of the plurality of digital phase shift circuits, of which the phase shift quantity is uneven with respect to those of other digital phase shift circuits of the plurality of digital phase shift circuits.
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公开(公告)号：US11843156B2
公开(公告)日：2023-12-12
申请号：US17430765
申请日：2020-04-28
Applicant: FUJIKURA LTD.
Inventor： Yusuke Uemichi
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.
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公开(公告)号：US20220231390A1
公开(公告)日：2022-07-21
申请号：US17612135
申请日：2020-06-05
Applicant: FUJIKURA LTD.
Inventor： Yusuke Uemichi
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.
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公开(公告)号：US20220158321A1
公开(公告)日：2022-05-19
申请号：US17430765
申请日：2020-04-28
Applicant: FUJIKURA LTD.
Inventor： Yusuke Uemichi
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.
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公开(公告)号：US20220158316A1
公开(公告)日：2022-05-19
申请号：US17428174
申请日：2020-03-06
Applicant: FUJIKURA LTD.
Inventor： Yusuke Uemichi
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).
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Patent Agency Ranking
公开(公告)号：US11050130B1
公开(公告)日：2021-06-29
申请号：US16757818
申请日：2018-10-26
Applicant: FUJIKURA LTD.
Inventor： Yusuke Uemichi
Abstract: Provided is a dielectric waveguide having a good reflection characteristic also in a band on a low frequency side of a center frequency of a given operation band. A dielectric waveguide (1) includes: a waveguide region (12) which is defined by a first wide wall (21), a second wide wall (22), a first narrow wall (23), a second narrow wall (24), and a short wall (25) and which is filled with a dielectric; and a mode conversion section (31) which includes a columnar conductor (34) extending from a surface of the waveguide region (12) toward an inside of the waveguide region (12). A width (W2) of the short wall (25) is configured to be greater than a waveguide width (Wi) at a location (x=x1) at which the columnar conductor (34) is provided.
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公开(公告)号：US11011814B2
公开(公告)日：2021-05-18
申请号：US16328050
申请日：2017-08-08
Applicant: Fujikura Ltd.
Inventor： Yusuke Uemichi , Ning Guan
Abstract: A transmission line includes a post-wall waveguide which includes a dielectric substrate on which a pair of post-walls is formed and a first conductor layer and a second conductor layer opposed to each other with the dielectric substrate interposed therebetween and in which a region surrounded by the pair of post-walls, the first conductor layer, and the second conductor layer is a waveguide region, a waveguide tube having a hollow rectangular shape, being connected with the first conductor layer so as to cover an opening portion formed in a side wall, and in which an inside communicates with the waveguide region through an opening formed in the first conductor layer, and a wire member which is arranged such that through the opening, a first end is located inside the dielectric substrate and a second end is located in the waveguide tube.
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公开(公告)号：US20210005945A1
公开(公告)日：2021-01-07
申请号：US17040767
申请日：2019-03-08
Applicant: FUJIKURA LTD.
Inventor： Yusuke Uemichi
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), an external post wall (14a1, 14a2, 14b1, 14b2) is provided which is constituted by at least one conductor post that is provided outside a waveguide region (D1) and that short-circuits an outer periphery of an upper wide wall (12a) and an outer periphery of a lower wide wall (12b).
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公开(公告)号：US20200161736A1
公开(公告)日：2020-05-21
申请号：US16611249
申请日：2018-04-27
Applicant: Fujikura Ltd.
Inventor： Yusuke Uemichi
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.
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公开(公告)号：US10135108B2
公开(公告)日：2018-11-20
申请号：US15189411
申请日：2016-06-22
Applicant: FUJIKURA LTD.
Inventor： Yusuke Uemichi
Abstract: In a directional coupler, a rectangular waveguide includes a second narrow wall and has a width varying part resulting from the second narrow wall protruding toward a first narrow wall, the width varying part including at least a portion of an opening, the protruding part protruding by a protrusion amount larger at the center of the width varying part than at both ends thereof.
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