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Research and Development of High-Temperature Superconductor Millimeter-Wave Filters

Research Project

Project/Area Number 14550318
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 電子デバイス・機器工学
Research InstitutionSaitama University

Principal Investigator

KOBAYASHI Yoshio (2003)  Saitama University, Department of Electrical and Electronics Systems, Professor, 工学部, 教授 (00008830)

馬 哲旺 (2002)  埼玉大学, 工学部, 助教授 (40282909)

Co-Investigator(Kenkyū-buntansha) 小林 禧夫  埼玉大学, 工学部, 教授 (00008830)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2003: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2002: ¥2,200,000 (Direct Cost: ¥2,200,000)
Keywordshigh-temperature superconductor film / millimeter-wave filter / dielectric material / surface resistance / filters with transmission zeros / loss tangent
Research Abstract

Recent years have seen extensive studies on high-temperature superconductor (HTS) filters with small-size, low loss, and high frequency selectivity. There have been numerous reports and publications on HTS microstrip filters. On the other hand, as filters using coplanar waveguide (CPW) structures require only, one side superconductor film, lower fabrication cost is expected compared with filters using microstrip structures using two-sides superconductor films.
This research project is aimed at developing design and measuring methods of superconductor filters at millimeter-wave frequencies.
In 2002, three measuring methods, including the circular cavity method, the cut-off circular waveguide method, and the four modes in a sapphire rod resonator method, are developed for accurate measurement of the dielectric substrate (MgO) and the frequency dependence of surface resistance of superconductor film (YBa_2Cu_3O_7, i.e., YBCO) at millimeter-waves. The results show that at 30GHz and 70K, the … More loss tangent of the MgO substrate is smaller than 2x10^<-6,> while the surface resistance of YBCO film is about one fifth of that of the copper. Therefore, low loss resonators and filters can be built by using these materials even at millimeter-waves.
Based on these measured results, an H-slot type resonator using CPW structure is proposed, and the simulated results show it owns very high Q-factors at millimeter-waves. Next, a low-loss HTS CPW 4-pole Chebyshev filter is designed using the H-slot type resonators.
In order to realize a high performance filter with low insertion-loss in its passband and sharp attenuation in its stopband, a general circuit model of a filter having one cross coupling path is analyzed, and a new theory is developed for the design of a filter with poles of attenuation in its stopband. By using the derived formulas, the reactance element values in the cross coupling path are determined readily. The attenuation poles can thus be assigned at desired frequencies. Various design examples are provided, together with simulated results, which validate the proposed theory.
The research results have been published with 5 papers in IEICE Transactions on Electronics, 4 technical reports of IEICE, 6 oral presentations at the national conferences of IEICE, 3 papers at international symposiums, and 5 papers at a number of technical workshops. Less

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Zhewang Ma, Toshiyuki Asano, Yoshio Kobayashi: "Theory for the Design of a Filter Having One Cross coupling Path to Realize Transmission Zeros"IEICE Transactions on Electronics. vol.86-C, No.8. 1690-1698 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Zhewang Ma, Yoshio Kobayashi: "On the Error of the Unloaded Q-Factor of a Transmission-Type Resonator Measured by the Insertion Loss Method and the Return Loss Method"IEICE Transactions on Electronics. vol.86-C, No.8. 1672-1677 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shimizu, Z.Ma, Y.Kobayashi: "Design of a grooved circular cavity for dielectric substrate measurements in millimeter wave region"IEICE Trans.Electron. Vol.E86-C, No.8. 1715-1720 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Hashimoto, Y.Kobayashi: "Frequency dependence measurements of surface resistance of superconductors using four modes in a sapphire rod resonator"IEICE Trans.Electron. Vol.E86-C, No.8. 1721-1728 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shimizu, Y.Kobayashi: "Cut-off circular waveguide method for dielectric substrate measurements in millimeter wave range"IEICE Trans.Electron. Vol.E87-C. 672-680 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Zhewang Ma, Yoshio Kobayashi: "On the Error of the Unloaded Q-Factor of a Transmission-Type Resonator Measured by the Insertion Loss Method and the Return Loss Method"IEICE Trans.Electron.. vol.E86-C, No.8. 1672-1677 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Zhewang Ma, Toshiyuki Asano, Yoshio Kobayashi: "Theory for the Design of a Filter Having One Cross coupling Path to Realize Transmission Zeros"IEICE Trans.Electron.. vol.E86-C, No.8. 1690-1698 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Takashi Shimizu, Zhewang Ma, Yoshio Kobayashi: "Design of a Grooved Circular Cavity for Dielectric Substrate Measurements in Millimeter Wave Region"IEICE Trans.Electron.. vol.E86-C, No.8. 1715-1720 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Hashimoto, Y.Kobayashi: "Frequency dependence measurements of surface resistance of superconductors using four modes in a sapphire rod resonator"IEICE Trans.Electron.. vol.E86-C, No.8. 1721-1728 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shimizu, Y.Kobayashi: "Cut-off circular waveguide method for dielectric substrate measurements in millimeter wave range"IEICE Trans.Electron.. vol.E86-C, No.8. 672-680 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shimizu, Z.Ma, Y.Kobayashi: "Design of a grooved circular cavity for dielectric substrate measurements in millimeter wave region"IEICE Trans.Electron. Vol.E86-C,No.8. 1715-1720 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Hashimoto, Y.Kobayashi: "Frequency dependence measurements of surface resistance of superconductors using four modes in a sapphire rod resonator"IEICE Trans.Electron. Vol.E86-C,No.8. 1721-1728 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Shimizu, Y.Kobayashi: "Cut-off circular waveguide method for dielectric substrate measurements in millimeter wave range"IEICE Trans.Electron. Vol.E87-C. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Hashimoto, Y.Kobayashi: "Two-sapphire-rod-resonator method to measure the surface resistance of high-Tc superconductor films"IEICE Trans.Electron. Vol.E87-C. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Takashi Shimizu, Zhewang Ma, Yoshio Kobayashi: "Design of a Grooved Circular Cavity for Dielectric Substrate Measurements in Millimeter Wave Region"IEICE Transactions on Electronics. vol.86-C, No.8. (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Zhewang Ma, Toshiyuki Asano, Yoshio Kobayashi: "Theory for the Design of a Filter Having One Cross coupling Path to Realize Transmission Zeros"IEICE Transactions on Electronics. vol.86-C, No.8. (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Zhewang Ma, Yoshio Kobayashi: "On the Error of the Unloaded Q-Factor of a Transmission-Type Resonator Measured by the Insertion Loss Method and the Return Loss Method"IEICE Transactions on Electronics. vol.86-C, No.8. (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Toru Hashimoto, Yoshio Kobayashi: "Frequency Dependence Measurements of Surface Resistance of Superconductors using Four Modes in a Sapphire Rod Resonator"IEICE Transactions on Electronics. vol.86-C, No.8. (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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