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Fabrication of coplanar filter by using YBCO sol-gel film.

[In Japanese. / En japonais.]

Author(s) : KANAYA H., KANEYUKI T., SENOH H., et al.

Type of article: Article

Summary

High-temperature superconductor (HTS) materials are very promising for high-frequency passive devices because of their extremely low loss at the microwave region. A coplanar waveguide (CPW) is one of the simplest planar transmission lines and is especially well suited to HTS films because only one side of the substrate needs to be coated before patterning. Furthermore, since the size of the CPW device can be reduced in scale without changing its characteristic impedance, it is easy to miniaturize the HTS bandpass filter (BPF) and make it compatible with the monolithic microwave integrated circuits. In this paper, YBCO films were prepared on MgO polycrystalline substrates (50 x 25 x 1 mm3) by the sol-gel process. Microwave characteristics of YBCO BPF with attenuation poles at both sides of the passband are better than that of Cu BPF. To realize a sharper cut-off and a narrow bandwidth BPFs, 3-pole BPF with attenuation poles were also prepared.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2000-2375
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 34 - n. 4
  • Publication date: 1999/04
  • Document available for consultation in the library of the IIR headquarters only.

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