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    ELECTRO-MAGNETIC WAVE ABSORBING MATERIAL
    3.
    发明专利
    ELECTRO-MAGNETIC WAVE ABSORBING MATERIAL 未知

    公开(公告)号：DE3374042D1

    公开(公告)日：1987-11-12

    申请号：DE3374042

    申请日：1983-03-31

    Applicant: NEC CORP

    Inventor： HATAKEYAMA KENICHI ,  INUI TETSUJI

    IPC: C08K3/08 ,  C08K7/06 ,  F41H3/00 ,  H05K9/00 ,  G12B17/02

    Abstract: An electro-magnetic wave absorbing member comprises a mixture of short fibers (2) of metal or alloy having a high electro-conductivity, a length of 0.1 mm to 50 mm and a length to diameter ratio larger than 10, ferrite and a high molecular weight synthetic resin. In a modification a sheet of this material is used as a low input impedance layer (13) and laminated with an electro-conductive sheet (12) and an impedance conversion layer (14). The member according to this invention can increase electrical loss contributing to the absorption of electro- magnetive waves, can stably control the absorption and can be used in many applications.

    MICROSTRIP LINE AND ITS MANUFACTURE
    4.
    发明专利
    MICROSTRIP LINE AND ITS MANUFACTURE 失效

    公开(公告)号：JPH07273510A

    公开(公告)日：1995-10-20

    申请号：JP6044094

    申请日：1994-03-30

    Applicant: NEC CORP

    Inventor： YOSHITAKE TSUTOMU ,  INUI TETSUJI

    IPC: H01P3/08 ,  C01G1/00 ,  C01G3/00 ,  H01B12/06 ,  H01B13/00 ,  H01P11/00

    Abstract: PURPOSE:To markedly increase an allowable power of a microstrip line employing an oxide superconductor. CONSTITUTION:YBa2Cu3OX group buffer layers 2, 4 having very small crystal grains whose diameter is less than 50mum formed to an upper side and a lower side of a dielectric board 1 are used. Then an upper strip conductor 3 and a lower ground conductor 5 being oxide superconductor of the YBa2Cu3OX thin film are respectively formed.

    MICRO STRIP LINE FILTER
    5.
    发明专利
    MICRO STRIP LINE FILTER 失效

    公开(公告)号：JPH07202507A

    公开(公告)日：1995-08-04

    申请号：JP33394293

    申请日：1993-12-28

    Applicant: NEC CORP

    Inventor： YOSHITAKE TSUTOMU ,  INUI TETSUJI

    IPC: H01L39/22 ,  H01P1/203 ,  H01P1/212

    Abstract: PURPOSE:To make the filter characteristic more excellent by providing a radio wave absorber for reduction of disturbance of the electromagnetic field mode and the occurrence of the higher-order mode on the inside wall of the case of a filter to reduce the occurrence of noise due to the disturbance of the resonance mode. CONSTITUTION:A case 8 is made of brass which has the surface plated with gold about 5mum thick. A radio wave absorber 9 is provided on the surface of the inside wall of this case 8. A ferrite having a large magnetic loss is used as this radio wave absorber 9. With respect to this ferrite, an imaginary part of the high frequency permeability is large, and a magnetite, a nickel ferrite, a lithium ferrite, a copper ferrite, a barium ferrite, or the like can be used in the GHz area. In this case, pasted fine particles of a magnetite are printed on the surface of the inside wall of the case 8 with about 100mum thickness to obtain the radio wave absorber.

    MICROSTRIP LINE CIRCUIT ELEMENT
    6.
    发明专利
    MICROSTRIP LINE CIRCUIT ELEMENT 失效

    公开(公告)号：JPH0661712A

    公开(公告)日：1994-03-04

    申请号：JP13814192

    申请日：1992-05-29

    Applicant: NEC CORP

    Inventor： INUI TETSUJI

    IPC: H01P7/08

    Abstract: PURPOSE:To adjust and confirm the resonance characteristic or the like of the circuit element with high performance utilizing a specific property of superconduction at a temperature lower than the critical temperature even at room temperature by providing a conductor pattern of a duplicate film comprising a thin film of a superconducting material and a thin film made of a metallic material superposed thereon to the element. CONSTITUTION:A strip pattern 1 forming a center conductor with a superposed structure of a superconducting thin film made of a high temperature superconducting material and a metallic thin film 12, is formed on a substrate 2 by vapor deposition. Then a connector 7 being an input output terminal is connected to the pattern, a fixed body 4 is formed on an upper side made of a dielectric material of a low loss, a packing body 5 is formed to the left/right and a sheet 6 is arranged to the lower side and they are stored in a shield case 3 used in common for earthing. Thus, it is possible to confirm the characteristic of the microstrip line circuit element comprising the strip pattern 1, the substrate 2 and the shield case 3 even at room temperature over the critical transmitter.

    MICRO STRIP LINE RESONATOR AND PRODUCTION OF SHIELD FOR THE SAME
    10.
    发明专利
    MICRO STRIP LINE RESONATOR AND PRODUCTION OF SHIELD FOR THE SAME 失效

    公开(公告)号：JPH0722822A

    公开(公告)日：1995-01-24

    申请号：JP16238293

    申请日：1993-06-30

    Applicant: NEC CORP

    Inventor： YOSHITAKE TSUTOMU ,  INUI TETSUJI

    IPC: H01P7/08 ,  H01P11/00

    Abstract: PURPOSE:To provide the small-sized micro strip line resonator which has a very high no-load Q value and a high performance by using an oxide superconductor for the micro strip line resonator as a basic element of a microwave circuit. CONSTITUTION:When an oxide superconductor and a dielectric are used to form the micro strip line resonator, the oxide superconductor is used as constituting materials of a strip line resonator 1, input/output strip lines 4 and 5, and a grounding conductor 3, and the oxide superconductor is used as constituting materials of a shield 8 of the micro strip line resonator also. Therefore, the conductor loss of the strip line resonator 1 and the grounding conductor 3 and the loss in the shield are reduced, and consequently, a very high no-load Q value is obtained.

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