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High temperature superconducting space-qualified multiplexers and delay lines

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9 Author(s)
Talisa, Salvador H. ; Sci. & Technol. Center, Northrop Grumman Corp., Pittsburgh, PA, USA ; Janocko, M.A. ; Meier, D.L. ; Talvacchio, J.
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A high temperature superconducting (HTS) four-channel multiplexer and a delay line were fabricated, space qualified and tested as part of the U.S. Navy's High Temperature Superconductivity Space Experiment II (HTSSE-II). The multiplexer had an architecture that included two branch-line hybrids and two identical parallel-coupled line filters per channel. Its operation was centered at 4 GHz, with 50-MHz-wide channels. It was fully integrated, with microstrip interconnections between channels and thin-film load terminations in the out-of-phase port of the output hybrid. The delay line was made up of two cascaded modules for a total delay of 45 ns between 2 and 6 GHz. Both devices were made using 5-cm-diameter LaAlO3 wafers coated with epitaxial thin film YBa2 Cu3O7, on both sides in the case of the delay line. Both devices operated at 77 K

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:44 ,  Issue: 7 )

Date of Publication:

Jul 1996

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