Flux-flow-type Josephson oscillator for millimeter and submillimeter wave region. III. Oscillation stability

T. Nagatsuma, Keiji Enpuku, K. Sueoka, K. Yoshida, F. Irie

研究成果: ジャーナルへの寄稿記事

81 引用 (Scopus)

抄録

Numerical as well as experimental studies have been made of the oscillation stability for the travelling-wave-type oscillator, which utilizes a vortex motion in a long Josephson junction, i.e., a flux flow. For the Josephson oscillator, a steep current step in a dc I-V characteristic improves the oscillation stability. Two kinds of effects which degrade the steepness of the current step have been investigated for the long junction of the overlap geometry. One is the self-field effect which makes the current step inclined, and the other is the resonant motion of the vortices which induces a staircaselike structure on the current step. We have discussed the method for the reduction of these effects and proposed a novel junction geometry without these effects, i.e., an overlap junction with a projection on one junction side. With the new geometry, we have obtained current steps whose slope is about one hundred times steeper than those obtained with the conventional overlap geometry and whose height attains about a half of the maximum critical current over the wide voltage region 0.1≤Vdc≤1.0 mV. The linewidth calculated from the current step is expected to be a few kHz.

元の言語英語
ページ(範囲)441-449
ページ数9
ジャーナルJournal of Applied Physics
58
発行部数1
DOI
出版物ステータス出版済み - 12 1 1985

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submillimeter waves
millimeter waves
oscillators
oscillations
geometry
vortices
slopes
traveling waves
Josephson junctions
critical current
projection
electric potential

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Flux-flow-type Josephson oscillator for millimeter and submillimeter wave region. III. Oscillation stability. / Nagatsuma, T.; Enpuku, Keiji; Sueoka, K.; Yoshida, K.; Irie, F.

:: Journal of Applied Physics, 巻 58, 番号 1, 01.12.1985, p. 441-449.

研究成果: ジャーナルへの寄稿記事

Nagatsuma, T. ; Enpuku, Keiji ; Sueoka, K. ; Yoshida, K. ; Irie, F. / Flux-flow-type Josephson oscillator for millimeter and submillimeter wave region. III. Oscillation stability. :: Journal of Applied Physics. 1985 ; 巻 58, 番号 1. pp. 441-449.
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AU - Irie, F.

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