Fabrication of Low-Loss Microstrip Band-Pass Filter Made from Double-Sided YBa_2Cu_3O_x Films

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概要

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• A three-pole microstrip band-pass filter, with a center frequency of 9.5 GHz and bandwidth of 2%, has been fabricated using YBa_2Cu_3O_x (YBCO) films deposited on both sides of (100)MgO substrates by pulsed laser ablation. A double-sided YBCO filter has a much lower passband insertion loss, 0.08 dB at 77 K and less than 0.04 dB below 60 K, compared with the 0.20 dB of a YBCO filter with a Au ground plane, and with the 1.1 dB of a conventional double-sided Au filter at 77 K. The extremely low insertion loss characteristics correspond to the element resonator unloaded quality factor (Q_u) of 6000 at 77 K and greater than 10000 below 60 K. These results demonstrate that very compact high-Q_u superconducting filters with waveguide-like performance can be achieved inplanar microstrip configurations.

• 社団法人応用物理学会の論文
• 1994-08-15

著者

• YOSHITAKE Tsutomu

  Fundamental Research Laboratories, NEC Corporation

• Tsuge Hisanao

  Fundamental Research Laboratories Nec Corporation

• INUI Tetsuji

  Resources and Environment Protection Research Laboratories

• SUZUKI Shinji

  Space Systems Development Division, NEC Corporation

• Yoshitake Tsutomu

  Fundamental Research Laboratories Nec Corporation

• Suzuki Shinji

  Space Systems Development Division Nec Corporation

関連論文

• Low Temperature Growth of Epitaxial La_Sr_MnO_3 Thin Films by an Excimer-Laser-Assisted Coating Pyrolysis Process
• Preparation of 107 K Superconducting Thin Film in Bi-Sr-Ca-Cu-O System by Coevaporation : Electrical Properties of Condensed Matter
• Anisotropic Upper Critical Fields of Highly Oriented Bi-Sr-Ca-Cu-O Thin Films Prepared by Coevaporation : Electrical Properties of Condensed Matter
• Preparation of Thin Films by Coevaporation and Phase Identification in Bi-Sr-Ca-Cu-O System : Electrical Properties of Condensed Matter
• Determination of the Orthorhombic-Tetragonal YBa_2Cu_3O_ Phase Boundary in the δ-T Diagram
• Effect of Oxygen Deficiency on the Crystal Structure and Superconducting Properties of the Ba_2YCu_3O_y
• Fabrication of Low-Loss Microstrip Band-Pass Filter Made from Double-Sided YBa_2Cu_3O_x Films

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