Title :
High-temperature superconducting wide band delay lines
Author :
Talisa, S.H. ; Janocko, M.A. ; Meier, D.L. ; Moskowitz, C. ; Grassel, R.L. ; Talvacchio, J. ; LePage, P. ; Buck, D.C. ; Nye, R.S. ; Pieseski, S.J. ; Wagner, G.R.
Author_Institution :
Sci. & Technol. Center, Westinghouse Electr. Corp., Pittsburgh, PA, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
Stripline non-dispersive delay lines with 20 GHz of bandwidth were designed and fabricated using YBCO thin films deposited on both sides of 2-inch-diameter, 10-mil thick LaAlO/sub 3/ wafers. A double-wound spiral configuration was used yielding a line length of approximately 150 cm. Novel approaches were used to minimize the effect of air gaps between the two substrates needed to form the stripline structure, and to realize a wide band transition from the coaxial external connections to stripline. Experimental results showed 5 dB of insertion loss at 20 GHz, with 1 dB amplitude ripple over most of the 0-20 GHz, range for a 22.5 ns delay.<>
Keywords :
barium compounds; delay lines; high-temperature superconductors; strip line components; superconducting microwave devices; superconducting thin films; yttrium compounds; 0 to 20 GHz; 150 cm; 2 in; 20 GHz; 22.5 ns; 5 dB; LaAlO/sub 3/; LaAlO/sub 3/ wafers; YBCO thin films; YBaCuO-LaAlO/sub 3/; coaxial external connections to stripline transition; double-wound spiral configuration; high-temperature superconductor; stripline nondispersive delay lines; wideband delay lines; wideband transition; Air gaps; Bandwidth; Delay lines; High temperature superconductors; Spirals; Sputtering; Stripline; Superconducting thin films; Wideband; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
