2022 Fiscal Year Final Research Report
Traveling-wave-type superconducting parametric amplifier using artificial periodic transmission line in the microwave range
| Project/Area Number |
20K04598
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21060:Electron device and electronic equipment-related
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 超伝導 / パラメトリック増幅 / カイネティックインダクタンス / 周期構造線路 / NbTiN薄膜 |
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| Outline of Final Research Achievements |
We have studied a microwave-band traveling-wave superconducting parametric amplifier using a Fishbone-type superconducting transmission line (FTTL) with periodically arranged stubs. We established an analysis method for FTTL and showed that the characteristic impedance and effective wavelength can be varied by changing the stub length. In addition, it was shown that a hybrid FTTL line using CPW in the bending part is useful as a meander structure of FTTL. A gain analysis of FTTL-type superconducting parametric amplifier was performed, and it was shown that the same gain performance as that of conventional CPW-type superconducting parametric amplifier can be obtained with a line length of about 1/3 by using FTTL.
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| Free Research Field |
超伝導エレクトロニクス
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| Academic Significance and Societal Importance of the Research Achievements |
進行波型超伝導パラメトリック増幅器はマイクロ波帯において極低消費電力かつ広帯域動作可能な冷却低雑音増幅器であり，電波天文観測や量子計測分野への応用が期待されている．この増幅器は単なる超伝導伝送線路であり構造は単純であるが，高利得を得るためには線路長を非常に長くする必要があり作製が困難であった．本研究では，周期構造線路であるFishbone超伝導伝送線路を用いることで，従来の増幅器よりも作製が容易かつ小型にできることを示した．
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