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1986 Fiscal Year Final Research Report Summary

Study on Window-Output Cylindrical Cavity Multiple-Device Oscillators/Amplifiers and Their Parallel Running Operation.

Research Project

Project/Area Number 60550279
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 電子機器工学
Research InstitutionOkayama University

Principal Investigator

FUKUI Kiyoshi  School of Engineering,Okayama University, 工学部, 教授 (30033161)

Co-Investigator(Kenkyū-buntansha) NOGI Shigeji  School of Engineering, Okayama University, 工学部, 助手 (10033250)
Project Period (FY) 1985 – 1986
KeywordsMicrowave / Power Combining / Oscillator / Amplifier / Mode Analysis / Finite Element Method
Research Abstract

Power-combining characteristics of window-output cylindrical cavity multiple-device oscillators/amplifiers are investigated to give the following results. (1) A mode analysis of the oscillators based on circuit models shows that both <TM_(ono)> - and <TM_(m10)> - modes can be power-combining modes, and gives the condition for stable power-combining operation in the desired mode. (2) The electromagnetic field in the combiner cavities and the coupling of devices to the cavity field is calculated using finite element method. (3) By the experiments using Gunn diodes, it is shown that almost perfect power combining in <TM_(210)> mode can be achieved as in <TM_(020)> mode and the power combining efficiency decreases gradually with increasing n and m. Power combining in the <TM_(810)> mode gives higher efficiency then in the <TM_(040)> mode. These experimental results agree qualitatively with the evaluation based on the device-field coupling. (4) The experiments of both transmission- and reflection-type power amplifiers with the <TM_(020)> -mode multiple-device cavity show that the power-combining efficiency and the frequencyresponse are better in the latter than in the former. (5) The parallel running of two <TM_(020)> -mode oscillators shows the capability of almost perfect power combining. In the case when one or two devices fall into breakdown in one of the oscillators, the output power of the oscillator can be recovered partially in the parallel running.

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] K.Fukui;S.Nogi: IEEE Trans.Microwave Theory Tech.MTT-34. 943-951 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 野木茂次,福井廉: 電子通信学会論文誌(C). J69-C. 964-973 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Nogi;K.Fukui: IEEE Trans.Microwave Theory Tech.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 野木茂次,定兼良宏,福井廉: 電子通信学会技術研究報告. MW86-10. 71-78 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 野木茂次,福井廉: 電子通信学会技術研究報告. NLP86-15. 41-50 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 福井廉,野木茂次,他: 電子情報通信学会創立70周年記念総合全国大会誌.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Fukui & S. Nogi: "Mode Analytical Study of Cylindrical Cavity Power Combiners." IEEE Trans. Microwave Theory Tech.MTT-34. 943-951 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nogi & K. Fukui: "Power-Combining Operation of Window-Output Cylindrical Cavity Multiple-Device Structures." Trans. IECEJ. J-69. 964-973 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nogi & K. Fukui: " <TM_(ono)> - and <TM_(m10)> -Mode Oversized Cylindrical Cavity Power Combiners." IEEE TRans. Microwave Theory Tech.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nogi, Y. Sadakane and K. Fukui: "On the Coupling between Electromagnetic Field and Device-Posts in Multiple-Device Cylindrical Cavities." IECEJ Japan, Tech. Rep.MW86-10. 71-78 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Nogi & K. Fukui: "Treatment of the Moding Problem in Multiple-Device Cavity Combiners by Use of the Averaged Potential Theory." IECE Japan, Tech. Rep.NLP86-15. 41-50 (1986)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1988-11-10  

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