High flexibility and heat dissipating coaxial cable

Abstract

A coaxial cable includes an inner conductor made of a number of conductive strands which are twined to form a wire rope which is drawn through a die to reduce its diameter until the outer surface of the cable is substantially smooth and the cross section of the cable is substantially circular, an outer conductor concentrically around the inner conductor, and a dielectric between the inner and outer conductors. The strands of the cable may be a single metal or alloy wires, or may be plated wires. The outer conductor may be a highly flexible metallized tape which is helically wrapped around the dielectric. As such, the coaxial cable has substantially greater flexibility. According to a second embodiment, a coaxial cable includes inner and outer conductors, and a dielectric therebetween. The dielectric includes an outer cross-sectional shape which is preferably different from an inner cross-sectional shape of the outer conductor. As a result of the different cross-sectional shapes, channels are formed between dielectric and the outer conductor which facilitate cooling of the cable. According to a preferred aspect of the second embodiment, a cooling fluid is circulated throughout the channels to remove heat. The cooled coaxial cable provides a signal transmission medium with reduced high frequency signal attenuation.