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    Waveguide and communication system
    12.
    发明授权
    Waveguide and communication system 有权

    公开(公告)号：US11189898B2

    公开(公告)日：2021-11-30

    申请号：US16756189

    申请日：2018-10-22

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Jaewon Kim ,  Dipankar Ghosh ,  Craig W. Lindsay ,  Matthew S. Stay

    IPC: H01P3/16

    Abstract: A waveguide and a communication system including the waveguide are described. The waveguide is configured to propagate an electromagnetic wave having an operating frequency along the waveguide. The waveguide includes a substrate having a first dielectric constant, and an array of spaced apart unit cells at least partially embedded in the substrate and arranged along the waveguide. Each of a plurality of the unit cells in the array of spaced apart unit cells has a first transmission parameter S121 having a lowest resonant frequency Γ1 and includes a dielectric body and one or more electrically conductive layers disposed on and partially covering the dielectric body. The dielectric body has a second dielectric constant greater than the first dielectric constant at the operating frequency and has a second transmission parameter S221 having a lowest resonant frequency Γ2 greater than Γ1.

    Electrically conductive article containing shaped particles and methods of making same
    13.
    发明授权
    Electrically conductive article containing shaped particles and methods of making same 有权

    公开(公告)号：US10785900B2

    公开(公告)日：2020-09-22

    申请号：US15027496

    申请日：2014-11-10

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Dipankar Ghosh ,  Jeffrey W. McCutcheon ,  Scott R. Culler

    IPC: H05K9/00 ,  H01B1/24 ,  H01B1/20 ,  H01B1/22

    Abstract: Electrically conductive articles are provided, including a composite including (a) a resin, and (b) electrically conductive shaped particles distributed in the resin, the particles having a monosized distribution. Each particle has a shape including at least a first surface and a second surface intersecting the first surface at an angle a between about 5 degrees and about 150 degrees. The composite has a thickness and often each of the electrically conductive shaped particles distributed in the resin is oriented within the resin such that the particle does not extend beyond the thickness of the composite. A method for making an electrically conductive article is also provided, including (a) providing electrically conductive shaped particles having a monosized distribution, and (b) distributing the particles into a resin to form a composite.

    HIGH FREQUENCY ELECTROMAGNETIC INTERFERENCE (EMI) COMPOSITES
    17.
    发明申请
    HIGH FREQUENCY ELECTROMAGNETIC INTERFERENCE (EMI) COMPOSITES 审中-公开

    公开(公告)号：US20180177081A1

    公开(公告)日：2018-06-21

    申请号：US15579077

    申请日：2016-06-02

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Dipankar Ghosh

    IPC: H05K9/00

    CPC classification number: H05K9/009 ,  H05K9/0083

    Abstract: Electromagnetic interference (EMI) shielding composites and methods of producing the same are described. Carbon nanostructure (CNS) fillers including cross-linked carbon nanotubes (CNTs) and a polymeric encapsulation material are provided, where the carbon nanotubes are encapsulated by the polymeric encapsulation material. The CNS fillers are treated to remove at least a portion of the polymeric encapsulation material. After removing the polymeric encapsulation material, the CNS fillers are mixed with a curable matrix material to obtain EMI shielding composites. In some cases, the removal of the polymeric encapsulation material results in diminished dielectric polarization characteristics for the composites.

    VOLTAGE SENSOR
    19.
    发明申请
    VOLTAGE SENSOR 审中-公开
    电压传感器

    公开(公告)号：US20170030946A1

    公开(公告)日：2017-02-02

    申请号：US15106591

    申请日：2014-12-16

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Mark Gravermann ,  Sebastian Eggert ,  Michael Petry ,  Werner Roehling ,  Friedrich A. Busemann ,  Bernd Schubert ,  Gerhard Lohmeier ,  Michael H. Stalder ,  Jens Weichold ,  Rainer Reeken ,  Andreea Sabo ,  Christian Weinmann ,  Dipankar Ghosh ,  Myungchan Kang ,  Christopher D. Sebesta

    IPC: G01R15/16 ,  G01R19/00

    CPC classification number: G01R15/16 ,  G01R15/142 ,  G01R15/181 ,  G01R19/0084

    Abstract: Voltage sensor (1) for a high- or medium-voltage power-carrying conductor for a power network, such as an inner conductor of a power cable or a cable connector or a bus bar. The voltage sensor has a tubular shape and an axial passageway (40), which can receive the conductor. The voltage sensing device comprises a) a radially-inner electrode (20), operable as a first sensing electrode of a sensing capacitor for sensing the voltage of the power-carrying conductor, b) a radially-outer electrode (30), operable as a second sensing electrode of the sensing capacitor, and c) a solid carrier element (10), at least a first portion of which is arranged between the inner electrode and the outer electrode, the first portion being operable as a dielectric of the sensing capacitor. The sensor can be accommodated in a cable accessory. The carrier element may comprise ceramic material to increase accuracy.

    Abstract translation: 用于电力网络的高压或中压供电导体的电压传感器（1），例如电力电缆或电缆连接器或汇流条的内部导体。 电压传感器具有管状形状和可接收导体的轴向通道（40）。 所述电压感测装置包括：a）径向内部电极（20），其可用作感测电容器的第一感测电极，用于感测所述功率承载导体的电压; b）径向外部电极（30），其可操作为 感测电容器的第二感测电极，以及c）固体载体元件（10），其至少第一部分布置在所述内部电极和所述外部电极之间，所述第一部分可操作为所述感测电容器的电介质 。 传感器可以容纳在电缆附件中。 载体元件可以包括陶瓷材料以提高精度。

    Electromagnetic Interference (EMI) Shielding Products Using Titanium Monoxide (TIO) Based Materials
    20.
    发明申请
    Electromagnetic Interference (EMI) Shielding Products Using Titanium Monoxide (TIO) Based Materials 审中-公开
    使用一氧化钛（TIO）材料的电磁干扰（EMI）屏蔽产品

    公开(公告)号：US20160309628A1

    公开(公告)日：2016-10-20

    申请号：US15102863

    申请日：2014-12-11

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Dipankar Ghosh

    IPC: H05K9/00 ,  C08K3/22

    CPC classification number: H05K9/0083 ,  C08K3/22 ,  C08K2003/2206 ,  C08K2003/221 ,  C08K2003/2237 ,  C08K2003/2265 ,  C08K2003/2289 ,  H05K9/0081

    Abstract: Compositions (120), which may be in the form of flexible films, molded bodies, or printable inks, can incorporate ceramic particles (122) comprising titanium monoxide (TiO) for purposes of electromagnetic interference (EMI) shielding at megahertz through gigahertz frequencies. One or more additional ceramic particles can also be included. The compositions comprise a composite material (120) which includes the ceramic particles (122) dispersed within a matrix material (121), such as a polymer. Methods associated with such compositions are also described.

    Abstract translation: 可以是柔性膜，成型体或可印刷油墨形式的组合物（120）可以包含一氧化钛（TiO）的陶瓷颗粒（122），用于以兆赫兹频率通过千兆赫兹频率的电磁干扰（EMI）屏蔽。 还可以包括一种或多种另外的陶瓷颗粒。 组合物包括复合材料（120），其包括分散在基质材料（121）如聚合物中的陶瓷颗粒（122）。 还描述了与这种组合物相关的方法。

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