Analysis and performance of superconductive coaxial transmission lines

This paper discusses the mechanisms affecting metallic conduction and dielectric properties in relation to a low temperature transmission line to provide a basis for analysis of the characteristic change, and the remaining losses at low temperature. Specific attention is given to lines employing Teflon or polyethylene as dielectrics, and operating up to 10 Gc. The construction and measured performance of a number of long superconductive coaxial lines is given in support of the analytical results.