NDLI: Josephson array oscillators with microstrip resonators

Content Provider	IEEE Xplore Digital Library
Author	Kawakami, A. Uzawa, Y. Wang, Z.
Copyright Year	2002
Abstract	Interaction between two Josephson junctions and a microstrip resonator is investigated using a resonator shunted junction (RLCSJ) model. A sharp current step resulting from coupling with the resonator is observed in simulated I-V characteristics. There is strong phase-locking and decreasing of dynamic resistance at the current step. We design and fabricate two types of Josephson array oscillators using these effects to obtain stable phase locking and narrow linewidth for the oscillation. The fabricated oscillators are formed with nine shunted Nb/AlOx/Nb tunnel junctions and Nb microstrip resonators. The power of the oscillator delivered to the load resistor was estimated to be about 3.6 /spl mu/W at 330 GHz. A composite linewidth of the oscillators is also measured at about 19 MHz at 4.2 K using two oscillators with a log-periodic antenna and a SIS detector.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3126
Ending Page	3129
Page Count	4
File Size	490377
File Format	PDF
ISSN	10518223
Volume Number	7
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Oscillators Microstrip antenna arrays Microstrip resonators Josephson junctions Phased arrays Niobium Resonance Equivalent circuits Resonant frequency Resistors
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Properties of Josephson array oscillators at the submillimeter wave region

Arrays of Josephson junctions coupled by distributed circuits

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Refractory submillimeter Josephson effect sources

Josephson junction phased arrays

Resonances in two-dimensional array oscillator circuits

Phase-locking in distributed arrays of Josephson oscillators

Detailed investigation of two-dimensional Josephson junction array circuits

Phase shifting in a Josephson junction active antenna array

Josephson array oscillators with microstrip resonators

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Resonances in two-dimensional array oscillator circuits

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