Title :
Miniature superconductive coaxial transmission lines
Author :
Nahman, Norris S.
Author_Institution :
National Bureau of Standards, Boulder, Colo.
Abstract :
This is a review paper concisely tracing the development of miniature superconductive coaxial transmission lines from the original invention as a vertical channel signal delay line for fractional nanosecond pulse oscillography to present-day work towards highly compact, broad-band, and low-loss telecommunication cables. The present state of development yields a 1.6-mm coaxial line operating at 4.2K and having Pb conductors, polyethylene dielectric, Z0= 50 ± 0.3 Ω and a 1-GHz attenuation of the order of 1 dB/km. The attenuation up to 1 GHz is mainly due to dielectric losses.
Keywords :
Attenuation; Coaxial cables; Coaxial components; Conductors; Delay lines; Dielectric losses; Polyethylene; Superconducting cables; Superconducting transmission lines; Superconductivity;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1973.8973
