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    • 8. 发明公开
    • Superconductive filter module, superconductive filter assembly, and heat insulating type coaxial cable
    • 超滤器模块,超滤器滤芯
    • EP1881553A1
    • 2008-01-23
    • EP07021420.0
    • 1999-02-26
    • FUJITSU LIMITED
    • Kai, ManabuYamanaka, KazunoriHasegawa, TsuyoshiManiwa, Toru
    • H01Q1/20
    • H01P1/205H01P1/30H01P3/06
    • The present invention relates to superconductive filter technology. According to the arrangement of the superconductive filter (1), a columnar resonating member (23) having a superconductive material formed on the surface thereof is attached at one of its ends thereof to an inner wall (22) of a filter housing (21) so that a space is interposed between the columnar resonating member and each of connectors (27a, 27b) which are connectable to a signal input/output cables (5a, 5b), respectively. According to this arrangement, heat conduction from the outside can be suppressed as far as possible, and the superconductive condition can be created with stability, with the result that a stable filtering characteristic can be created. Further, the superconductive filter according to the present invention will become excellent in power withstand performance, and hence even if the number of stages of filters is increased for attaining a steep cutoff characteristic, the loss deriving from the increased number of stages can be suppressed to the minimum level.
    • 本发明涉及超导滤波技术。 根据超导滤波器(1)的布置,在其表面上形成有超导材料的柱状谐振构件(23)的一端附接到过滤器壳体(21)的内壁(22) 使得在柱状共振构件和可连接到信号输入/输出电缆(5a,5b)的每个连接器(27a,27b)之间插入空间。 根据该结构,可以尽可能地抑制来自外部的热传导,并且可以稳定地产生超导条件,从而可以产生稳定的过滤特性。 此外,根据本发明的超导滤波器将具有优异的耐电性能,因此即使提高滤波器的级数以获得陡峭的截止特性,也可以将从增加的级数得到的损耗抑制到 最低水平。