Title :
Characteristic impedance of a microwave transmission line using a Tl/sub 2/Ba/sub 2/CaCu/sub 2/O/sub x/ superconductor on a MgO substrate
Author :
Shimaoka, K. ; Nemoto, M. ; Yoshikawa, S. ; Yoshida, I. ; Yoshisato, Y.
Author_Institution :
Tsukuba Res. Centre, Sanyo Electr. Co. Ltd., Ibaraki, Japan
fDate :
6/1/1997 12:00:00 AM
Abstract :
Characteristic impedance of microstrip lines having a Tl/sub 2/Ba/sub 2/CaCu/sub 2/O/sub x//MgO/Au structure is measured using a low-temperature vector network measuring system. A small test fixture for the superconducting microstrip lines is fabricated and mounted on a cryocooler. A correction method is applied to the data at low temperatures and the characteristic impedance of the superconducting microstrip lines is determined from the corrected data at 80 K.
Keywords :
barium compounds; calcium compounds; electric impedance measurement; high-temperature superconductors; magnesium compounds; microstrip lines; microwave reflectometry; network analysers; superconducting device testing; superconducting microwave devices; thallium compounds; 80 K; MgO; Tl/sub 2/Ba/sub 2/CaCu/sub 2/O-MgO-Au; characteristic impedance; correction method; cryocooler; low-temperature vector network measuring system; microwave transmission line; superconducting microstrip lines; test fixture; Fixtures; Gold; Impedance measurement; Microstrip; Superconducting microwave devices; Superconducting transmission lines; Temperature; Testing; Transmission line measurements; Transmission lines;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
