Phase locked 270-440 GHz local oscillator based on flux flow in long Josephson tunnel junctions

V.P. Koshelets; S.V. Shitov; L.V. Filippenko; V.L. Vaks; Jesper Mygind; A.B. Baryshev; W. Luinge; N. Whyborn

doi:10.1063/1.1150195

Phase locked 270-440 GHz local oscillator based on flux flow in long Josephson tunnel junctions

V.P. Koshelets, S.V. Shitov, L.V. Filippenko, V.L. Vaks, Jesper Mygind, A.B. Baryshev, W. Luinge, N. Whyborn

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Abstract

The combination of narrow linewidth and wide band tunability makes the Josephson flux flow oscillator (FFO) a perfect on-chip local oscillator for integrated sub-mm wave receivers for, e.g., spectral radio astronomy. The feasibility of phase locking the FFO to an external reference oscillator is demonstrated experimentally. A FFO linewidth as low as 1 Hz (determined by the resolution bandwidth of the spectrum analyzer) has been measured in the frequency range 270–440 GHz relative to a reference oscillator. This linewidth is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction. The results of residual FFO phase noise measurements are also presented. Finally, we propose a single-chip fully superconductive receiver with two superconductor–insulator–superconductor mixers and an integrated phase-locked loop. ©2000 American Institute of Physics.

Original language	English
Journal	Review of Scientific Instruments
Volume	71
Issue number	1
Pages (from-to)	289-293
ISSN	0034-6748
DOIs	https://doi.org/10.1063/1.1150195
Publication status	Published - 2000

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Copyright (2000) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

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title = "Phase locked 270-440 GHz local oscillator based on flux flow in long Josephson tunnel junctions",

abstract = "The combination of narrow linewidth and wide band tunability makes the Josephson flux flow oscillator (FFO) a perfect on-chip local oscillator for integrated sub-mm wave receivers for, e.g., spectral radio astronomy. The feasibility of phase locking the FFO to an external reference oscillator is demonstrated experimentally. A FFO linewidth as low as 1 Hz (determined by the resolution bandwidth of the spectrum analyzer) has been measured in the frequency range 270–440 GHz relative to a reference oscillator. This linewidth is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction. The results of residual FFO phase noise measurements are also presented. Finally, we propose a single-chip fully superconductive receiver with two superconductor–insulator–superconductor mixers and an integrated phase-locked loop. {\textcopyright}2000 American Institute of Physics.",

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note = "Copyright (2000) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.",

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T1 - Phase locked 270-440 GHz local oscillator based on flux flow in long Josephson tunnel junctions

AU - Koshelets, V.P.

AU - Shitov, S.V.

AU - Filippenko, L.V.

AU - Vaks, V.L.

AU - Mygind, Jesper

AU - Baryshev, A.B.

AU - Luinge, W.

AU - Whyborn, N.

N1 - Copyright (2000) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

PY - 2000

Y1 - 2000

N2 - The combination of narrow linewidth and wide band tunability makes the Josephson flux flow oscillator (FFO) a perfect on-chip local oscillator for integrated sub-mm wave receivers for, e.g., spectral radio astronomy. The feasibility of phase locking the FFO to an external reference oscillator is demonstrated experimentally. A FFO linewidth as low as 1 Hz (determined by the resolution bandwidth of the spectrum analyzer) has been measured in the frequency range 270–440 GHz relative to a reference oscillator. This linewidth is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction. The results of residual FFO phase noise measurements are also presented. Finally, we propose a single-chip fully superconductive receiver with two superconductor–insulator–superconductor mixers and an integrated phase-locked loop. ©2000 American Institute of Physics.

AB - The combination of narrow linewidth and wide band tunability makes the Josephson flux flow oscillator (FFO) a perfect on-chip local oscillator for integrated sub-mm wave receivers for, e.g., spectral radio astronomy. The feasibility of phase locking the FFO to an external reference oscillator is demonstrated experimentally. A FFO linewidth as low as 1 Hz (determined by the resolution bandwidth of the spectrum analyzer) has been measured in the frequency range 270–440 GHz relative to a reference oscillator. This linewidth is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction. The results of residual FFO phase noise measurements are also presented. Finally, we propose a single-chip fully superconductive receiver with two superconductor–insulator–superconductor mixers and an integrated phase-locked loop. ©2000 American Institute of Physics.

U2 - 10.1063/1.1150195

DO - 10.1063/1.1150195

M3 - Journal article

SN - 0034-6748

VL - 71

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EP - 293

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 1

ER -

Phase locked 270-440 GHz local oscillator based on flux flow in long Josephson tunnel junctions

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