NDLI: Demonstration of a 20 GHz phase shifter using high-temperature superconducting SNS junctions

Content Provider	IEEE Xplore Digital Library
Author	Berkowitz, S.J. Shih, C.F. Mallison, W.H. Zhang, D. Hirahara, A.S.
Copyright Year	2002
Abstract	We have achieved a figure-of-merit of 90/spl deg//dB from a Co-doped Superconductor-Normal-Superconductor junction series array phase shifter, with 300 junctions The maximum observed phase shift was 25/spl deg/ from a 900 junction array. The entire device fits on a die size of 0.5/spl times/0.5 cm/sup 2/, which is suitable for integration into a phased array. However, the performance of this high-temperature superconductor device is still below the 150/spl deg//dB for a conventional shifter. In simulations, we see that an improved performance of 150-200/spl deg//dB is possible. If this performance can be achieved, the reduced base loss in addition to the reduction in loss from the antennas and feed lines in an integrated antenna array would lead to a system-wide performance advantage for a superconducting system.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3056
Ending Page	3059
Page Count	4
File Size	551901
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	Phase shifters High temperature superconductors Josephson junctions Superconducting devices Phased arrays Optical arrays Inductance Antenna feeds Critical current Performance loss
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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