Superconducting transmission line cable connector providing capacative and thermal isolation

This patent describes a connector, electrically and mechanically coupling and thermally isolating a first high-temperature coaxial cable from a second low temperature coaxial cable. It comprises first connector half having a hollow outer conductor with a first inner diameter and having at least a hollow superconducting center conductor, second connector half having a hollow outer conductor having a first outer diameter less than the first inner diameter of the outer conductor of the first connector half, and having a center conductor at least a predetermined length of which is hollow; first capacitive coupling means for mechanically and capacitively coupling and thermally isolating the inner conductors of the first and second cables; second capacitive coupling means for mechanically and capacitively coupling and thermally isolating the outer conductors of the first and second cables