Title :
Ultra broad band measurements on high Tc ceramic superconducting transmission lines
Author :
Araki, K. ; Iwasa, I. ; Kobayashi, Y. ; Nagata, S. ; Morisue, M.
Author_Institution :
Dept. of Electron. Eng., Saitama Univ., Urawa, Japan
fDate :
3/1/1989 12:00:00 AM
Abstract :
Transmission lines were fabricated on high-Tc ceramic conductor thin films by means of a lithographic technique. A scalar network analyzer was used to perform measurements from 10 MHz to 26.5 GHz of the transmission and reflection characteristics of superconducting transmission lines at 4.2 K, 77 K, and room temperature. The lines were fabricated from 0.8-μm-thick YBa2Cu3 O7 on 1.0-mm-thick SrTiO3 substrates. Characteristic impedance, attenuation constant, phase constant, group time delay and group velocity were calculated by a novel algorithm which is processed in real time. Time domain responses, e.g., pulse delay and waveform distortion, were also easily obtained by a computer technique. The degradation due to the etching process is investigated, and a comparison is made of copper and ceramic transmission lines
Keywords :
barium compounds; high-temperature superconductors; superconducting cables; superconducting junction devices; yttrium compounds; 0.8 micron; 1.0 mm; 10 MHz to 26.5 GHz; 4.2 K; 77 K; SrTiO3; attenuation constant; ceramic superconducting transmission lines; characteristic impedance; etching process; group time delay; group velocity; high temperature superconductor; lithographic technique; phase constant; pulse delay; reflection characteristics; scalar network analyzer; waveform distortion; Ceramics; Conductive films; Copper; Delay effects; Performance analysis; Performance evaluation; Reflection; Superconducting thin films; Superconducting transmission lines; Transmission line measurements;
Journal_Title :
Magnetics, IEEE Transactions on
