High temperature superconducting space-qualified multiplexers and delay lines

Author

Talisa, Salvador H. ; Janocko, Michael A. ; Meier, D.L. ; Talvacchio, John ; Moskowitz, C. ; Buck, D.C. ; Nye, R.S. ; Pieseski, S.J. ; Wagner, George R.

Author_Institution

Sci. & Technol. Center, Northrop Grumman Corp., Pittsburgh, PA, USA

Volume

44

Issue

7

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

1229

Lastpage

1239

Abstract

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

Keywords

barium compounds; delay lines; high-temperature superconductors; microstrip lines; multiplexing equipment; space vehicle electronics; superconducting epitaxial layers; superconducting microwave devices; superconducting thin films; yttrium compounds; 2 to 6 GHz; 45 ns; 77 K; HTSSE-II; High Temperature Superconductivity Space Experiment II; LaAlO₃; YBa₂Cu₃O₇-LaAlO₃; branch-line hybrids; cascaded modules; epitaxial thin film; high temperature superconductors; microstrip interconnections; out-of-phase port; parallel-coupled line filters; space-qualified delay lines; space-qualified multiplexers; thin-film load terminations; total delay; Delay lines; High temperature superconductors; Microstrip; Multiplexing; Superconducting epitaxial layers; Superconducting filters; Superconducting thin films; Superconductivity; Testing; Thin film devices;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.508228

Filename

508228