Title :
Frequency characteristics of superconductive coaxial lines
Author :
Chiba, Nobuyuki ; Kashiwayanagi, Yuzo ; Mikoshiba, Koichi
Author_Institution :
Nippon Telegraph and Telephone Public Corporation, Tokyo, Japan
Abstract :
By precise manufacturing methods, 1.6-mm 50-Ω superconductive coaxial lines having few impedance irregularities (0.2 to 0.3 Ω) have been produced. Their attenuation constant at 4.2 K shows a smooth gradual increase upto 12.4 GHz in proportion to frequency. The loss at 1 GHz is 0.7 dB/km for the line using tetra fluoroethylene-hexa fluoropropylene (FEP) and 1.6 dB/km for the line using polyethylene (PE).
Keywords :
Attenuation measurement; Coaxial components; Diodes; Frequency; Impedance measurement; Loss measurement; Stability; Superconductivity; Transmission line measurements; Voltage-controlled oscillators;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1973.8982
