Externally Phase-Locked Flux Flow Oscillator for Submm Integrated Receivers; Achievements and Limitations

V. P. Koshelets; S. V. Shitov; P. N. Dmitriev; A. B. Ermakov; A. S. Sobolev; M. Y. Torgashin; V. V. Khodos; V. L. Vaks; P. R. Wesselius; C. Mahaini; Jesper Mygind

Externally Phase-Locked Flux Flow Oscillator for Submm Integrated Receivers; Achievements and Limitations

V. P. Koshelets, S. V. Shitov, P. N. Dmitriev, A. B. Ermakov, A. S. Sobolev, M. Y. Torgashin, V. V. Khodos, V. L. Vaks, P. R. Wesselius, C. Mahaini, Jesper Mygind

Department of Physics

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

A Josephson Flux Flow Oscillator (FFO) is the most developed superconducting local oscillator for integration with an SIS mixer in a single-chip submm-wave receiver. Recently, using a new FFO design, a free-running linewidth less than or equal to10 MHz has been measured in the frequency range up to 712 GHz, limited only by the gap frequency of Nb. This enabled us to phase lock the FFO in the frequency range 500-712 GHz where continuous frequency tuning is possible; resulting in an absolute FFO phase noise as low as -80 dBc at 707 GHz. Comprehensive measurements of the FFO radiation linewidth have been performed using an integrated SIS harmonic mixer. The influence of FFO parameters on radiation linewidth, particularly the effect of the differential resistances associated both with the bias current and the applied magnetic field has been studied in order to further optimize the FFO design. A new approach with a self-shielded FFO has been developed and experimentally tested.

Original language	English
Journal	IEEE Trans. Appl. Supercond
Volume	13
Issue number	2
Pages (from-to)	1035-1038
ISSN	1051-8223
Publication status	Published - 2003

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title = "Externally Phase-Locked Flux Flow Oscillator for Submm Integrated Receivers; Achievements and Limitations",

abstract = "A Josephson Flux Flow Oscillator (FFO) is the most developed superconducting local oscillator for integration with an SIS mixer in a single-chip submm-wave receiver. Recently, using a new FFO design, a free-running linewidth less than or equal to10 MHz has been measured in the frequency range up to 712 GHz, limited only by the gap frequency of Nb. This enabled us to phase lock the FFO in the frequency range 500-712 GHz where continuous frequency tuning is possible; resulting in an absolute FFO phase noise as low as -80 dBc at 707 GHz. Comprehensive measurements of the FFO radiation linewidth have been performed using an integrated SIS harmonic mixer. The influence of FFO parameters on radiation linewidth, particularly the effect of the differential resistances associated both with the bias current and the applied magnetic field has been studied in order to further optimize the FFO design. A new approach with a self-shielded FFO has been developed and experimentally tested.",

author = "Koshelets, {V. P.} and Shitov, {S. V.} and Dmitriev, {P. N.} and Ermakov, {A. B.} and Sobolev, {A. S.} and Torgashin, {M. Y.} and Khodos, {V. V.} and Vaks, {V. L.} and Wesselius, {P. R.} and C. Mahaini and Jesper Mygind",

year = "2003",

language = "English",

volume = "13",

pages = "1035--1038",

journal = "IEEE Trans. Appl. Supercond",

issn = "1051-8223",

publisher = "Institute of Electrical and Electronics Engineers",

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T1 - Externally Phase-Locked Flux Flow Oscillator for Submm Integrated Receivers; Achievements and Limitations

AU - Koshelets, V. P.

AU - Shitov, S. V.

AU - Dmitriev, P. N.

AU - Ermakov, A. B.

AU - Sobolev, A. S.

AU - Torgashin, M. Y.

AU - Khodos, V. V.

AU - Vaks, V. L.

AU - Wesselius, P. R.

AU - Mahaini, C.

AU - Mygind, Jesper

PY - 2003

Y1 - 2003

N2 - A Josephson Flux Flow Oscillator (FFO) is the most developed superconducting local oscillator for integration with an SIS mixer in a single-chip submm-wave receiver. Recently, using a new FFO design, a free-running linewidth less than or equal to10 MHz has been measured in the frequency range up to 712 GHz, limited only by the gap frequency of Nb. This enabled us to phase lock the FFO in the frequency range 500-712 GHz where continuous frequency tuning is possible; resulting in an absolute FFO phase noise as low as -80 dBc at 707 GHz. Comprehensive measurements of the FFO radiation linewidth have been performed using an integrated SIS harmonic mixer. The influence of FFO parameters on radiation linewidth, particularly the effect of the differential resistances associated both with the bias current and the applied magnetic field has been studied in order to further optimize the FFO design. A new approach with a self-shielded FFO has been developed and experimentally tested.

AB - A Josephson Flux Flow Oscillator (FFO) is the most developed superconducting local oscillator for integration with an SIS mixer in a single-chip submm-wave receiver. Recently, using a new FFO design, a free-running linewidth less than or equal to10 MHz has been measured in the frequency range up to 712 GHz, limited only by the gap frequency of Nb. This enabled us to phase lock the FFO in the frequency range 500-712 GHz where continuous frequency tuning is possible; resulting in an absolute FFO phase noise as low as -80 dBc at 707 GHz. Comprehensive measurements of the FFO radiation linewidth have been performed using an integrated SIS harmonic mixer. The influence of FFO parameters on radiation linewidth, particularly the effect of the differential resistances associated both with the bias current and the applied magnetic field has been studied in order to further optimize the FFO design. A new approach with a self-shielded FFO has been developed and experimentally tested.

M3 - Journal article

SN - 1051-8223

VL - 13

SP - 1035

EP - 1038

JO - IEEE Trans. Appl. Supercond

JF - IEEE Trans. Appl. Supercond

IS - 2

ER -

Externally Phase-Locked Flux Flow Oscillator for Submm Integrated Receivers; Achievements and Limitations

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