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High-T/sub c/ superconducting monolithic phase shifter

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4 Author(s)
Takemoto-Kobayashi, J.H. ; TRW Space & Technol. Group, Redondo Beach, CA, USA ; Jackson, C.M. ; Pettiette-Hall, C.L. ; Burch, J.F.

A high temperature superconducting (HTS) X-band phase shifter using a distributed Josephson inductance (DJI) approach was designed and fabricated. Phase swings of over 60 degrees were measured at 65 K and below, with measurable phase shifts at temperatures above 77 K. High quality HTS films and superconducting quantum interference devices (SQUIDs) were deposited by laser ablation. A total of 40 HTS step edge SQUIDs were successfully integrated into a monolithic HTS circuit to produce a phase shifter in a resonant configuration. The magnitude of the Josephson inductance is calculated and a lumped element model is compared to measurements.<>

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:2 ,  Issue: 1 )