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公开(公告)号：US10686515B2
公开(公告)日：2020-06-16
申请号：US16486206
申请日：2017-12-18
Applicant: Fujikura Ltd.
Inventor： Kiyoshi Kobayashi , Ning Guan
IPC: H04B7/08 , H04B1/00 , H01Q21/29 , H04B7/06 , H04B7/0404
Abstract: A wireless communication system includes a plurality of wireless stations. Each of at least two of the plurality of wireless stations includes, a first antenna transmitting a radio wave in a first frequency band, a second antenna transmitting a radio wave in a second frequency band lower in frequency than the first frequency band, a first transceiver transmitting and receiving a main signal in the first frequency band, and a second transceiver transmitting and receiving a control signal in the second frequency band. At least one of the at least two wireless stations includes, a variable beam antenna making a beam direction variable as the first antenna, a wide angle antenna having a radiation range equal to or wider than a variable range of the beam direction as the second antenna, and a controller controlling the beam direction of the variable beam antenna according to the control signal.
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公开(公告)号：US20200059291A1
公开(公告)日：2020-02-20
申请号：US16486206
申请日：2017-12-18
Applicant: Fujikura Ltd.
Inventor： Kiyoshi Kobayashi , Ning Guan
IPC: H04B7/08 , H04B1/00 , H04B7/0404 , H04B7/06 , H01Q21/29
Abstract: A wireless communication system includes a plurality of wireless stations. Each of at least two of the plurality of wireless stations includes, a first antenna transmitting a radio wave in a first frequency band, a second antenna transmitting a radio wave in a second frequency band lower in frequency than the first frequency band, a first transceiver transmitting and receiving a main signal in the first frequency band, and a second transceiver transmitting and receiving a control signal in the second frequency band. At least one of the at least two wireless stations includes, a variable beam antenna making a beam direction variable as the first antenna, a wide angle antenna having a radiation range equal to or wider than a variable range of the beam direction as the second antenna, and a controller controlling the beam direction of the variable beam antenna according to the control signal.
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公开(公告)号：US10326496B2
公开(公告)日：2019-06-18
申请号：US15125999
申请日：2015-09-03
Inventor： Satoshi Tsukamoto , Takahiro Maeda , Yafei Hou , Masayuki Ariyoshi , Kiyoshi Kobayashi , Fumio Suzuki , Atsuhiko Niwa
IPC: H04B5/00 , H01Q13/22 , H04B7/04 , H04B1/04 , H01Q13/20 , H01Q25/00 , H04B7/0413 , H01Q21/28 , H04B7/10
Abstract: A composite cable (4) houses a plurality of leaky coaxial cables having mutually different radiation characteristics. The leaky coaxial cable (2a, 2b) includes therein an inner conductor and an outer conductor, and has a plurality of leakage slots. The plurality of leakage slots have different slot periods relative to the axial direction or arranged in different slot patterns. The digital wireless communication device feeds a high-frequency signal from an end of the composite cable (4) and performs MIMO (multiple-input multiple-output) communication.
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公开(公告)号：US11881887B2
公开(公告)日：2024-01-23
申请号：US17632920
申请日：2021-01-13
Applicant: Fujikura Ltd.
Inventor： Yo Yamaguchi , Kiyoshi Kobayashi
IPC: H04B1/40
CPC classification number: H04B1/40
Abstract: A frequency converter up-converts a transmission signal in an intermediate frequency hand into a signal in a wireless frequency hand as a USB or an LSR of a local oscillation signal using the local oscillation signal. When PMhigh−1/2×IFwid≤RFtx≤PMhigh−1/2×CHwid, the frequency converter is configured to satisfy ωLO=PMhigh−1/2×Fwid−IFcent and IFtx=RFtx−ωLO. Alternatively, when PMlow+1/2×IFwid≥RFtx≥PMlow+1/2×CHwid, the frequency converter is configured to satisfy ωLO=PMlow+1/2×IFwid+IFcent and IFtx=ωLO−RFtx.
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公开(公告)号：US20230282976A1
公开(公告)日：2023-09-07
申请号：US18016723
申请日：2021-02-08
Applicant: Fujikura Ltd. , International Business Machines Corporation
Inventor： Kiyoshi Kobayashi , Ken Sakuma , Mark Yeck , Bodhisatwa Sadhu , Paidimarri Arun
CPC classification number: H01Q3/38 , H01Q3/28 , H04B7/0617
Abstract: A phased array antenna (1) includes: a plurality of antenna elements (11a to 11d); a plurality of signal paths (R11 and R12) that are connected to each of the antenna elements; a storage unit (M) configured to store a set values of at least one of amplitudes or phases of a signal passed through at least one predefined reference path among the plurality of signal paths with regard to at least one of the antenna elements, and an amplitude and phase control unit (22 or 26) configured to control at least one of the amplitude or the phase of the signal passed through the reference path connected to the antenna element by using the set value stored in the storage unit, and configured to control amplitude or phase of signal passed through the signal path other than the reference path.
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Patent Agency Ranking
公开(公告)号：US20240250405A1
公开(公告)日：2024-07-25
申请号：US18411432
申请日：2024-01-12
Applicant: Fujikura Ltd.
Inventor： Noriaki Shigematsu , Masao Mori , Kiyoshi Kobayashi , Yuki Suto
Abstract: A wireless module includes a first board having an antenna, the antenna transmitting and receiving a high frequency signal in a millimeter wave band, a second board handling a baseband signal with a lower frequency than the high frequency signal, and a housing including a cover and a case combined with each other and accommodating the first board and the second board, in which a passage portion that allows electromagnetic waves transmitted and received by the antenna to pass through is provided in the cover, and the first board is fixed to the cover while being in contact with the cover.
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公开(公告)号：US20240250401A1
公开(公告)日：2024-07-25
申请号：US18416484
申请日：2024-01-18
Applicant: Fujikura Ltd.
Inventor： Noriaki Shigematsu , Masao Mori , Kiyoshi Kobayashi , Yuki Suto
CPC classification number: H01Q1/02 , H05K7/2039
Abstract: A wireless module includes: a first substrate including an antenna that transmits and receives high-frequency signals in a millimeter-wave band, a first high-temperature element that supplies high-frequency signals to the antenna being mounted on the first substrate; and a housing including a cover and a case combined with each other and housing the first substrate, the first substrate is in contact with the cover in an opposing direction in which the case and the cover oppose each other, the case includes a first heat dissipation part protruding toward the first high-temperature element, a first heat dissipation sheet is provided between the first heat dissipation part and the first high-temperature element in the opposing direction, and the cover and the first heat dissipation part compress the first heat dissipation sheet and the first substrate in the opposing direction.
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公开(公告)号：US11764468B2
公开(公告)日：2023-09-19
申请号：US17468586
申请日：2021-09-07
Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION , FUJIKURA LTD
Inventor： Alberto Valdes Garcia , Arun Paidimarri , Bodhisatwa Sadhu , Jean-Olivier Plouchart , Xiaoxiong Gu , Christian Wilhelmus Baks , Yo Yamaguchi , Kiyoshi Kobayashi , Yoshiharu Fujisaku , Ning Guan
CPC classification number: H01Q3/2617 , H04B7/0617
Abstract: A phased array antenna includes an antenna array substrate having a plurality of antenna elements. At least two beamformers are coupled to the plurality of antenna elements. At least two filters support different frequency bands and are respectively coupled to the at least two beamformers. A frequency converter is coupled to the at least two filters, the frequency converter including one intermediate frequency (IF) port and at least two radio frequency (RF) ports. The one IF port of the frequency converter is configured to support the at least two beamformers via the at least two RF ports. A first beamformer of the at least two beamformers is coupled to a first filter of the at least two filters to form a first beam in a direction different than a second beamformer of the first two beamformers coupled to a second filter of the at least two filters.
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公开(公告)号：US20230163800A1
公开(公告)日：2023-05-25
申请号：US17632920
申请日：2021-01-13
Applicant: Fujikura Ltd.
Inventor： Yo Yamaguchi , Kiyoshi Kobayashi
IPC: H04B1/40
CPC classification number: H04B1/40
Abstract: A frequency converter up-converts a transmission signal in an intermediate frequency hand into a signal in a wireless frequency hand as a USB or an LSR of a local oscillation signal using the local oscillation signal. When PMhigh−1/2×IFwid≤RFtx≤PMhigh−1/2×CHwid, the frequency converter is configured to satisfy ωLO=PMhigh−1/2×Fwid−IFcent and IFtx=RFtx−ωLO. Alternatively, when PMlow+1/2×IFwid≥RFtx≥PMlow+1/2×CHwid, the frequency converter is configured to satisfy ωLO=PMlow+1/2×IFwid+IFcent and IFtx=ωLO−RFtx.
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公开(公告)号：US20230074376A1
公开(公告)日：2023-03-09
申请号：US17468586
申请日：2021-09-07
Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION , FUJIKURA LTD
Inventor： Alberto Valdes Garcia , Arun Paidimarri , Bodhisatwa Sadhu , Jean-Olivier Plouchart , Xiaoxiong Gu , Christian Wilhelmus Baks , Yo Yamaguchi , Kiyoshi Kobayashi , Yoshiharu Fujisaku , Ning Guan
Abstract: A phased array antenna includes an antenna array substrate having a plurality of antenna elements. At least two beamformers are coupled to the plurality of antenna elements. At least two filters support different frequency bands and are respectively coupled to the at least two beamformers. A frequency converter is coupled to the at least two filters, the frequency converter including one intermediate frequency (IF) port and at least two radio frequency (RF) ports. The one IF port of the frequency converter is configured to support the at least two beamformers via the at least two RF ports. A first beamformer of the at least two beamformers is coupled to a first filter of the at least two filters to form a first beam in a direction different than a second beamformer of the first two beamformers coupled to a second filter of the at least two filters.
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