| 摘要 |
A coaxial cable (400) includes an inner conductor (402) made of a number of conductive strands (412, 414, 416) which are twined to form a wire rope which is drawn through a die to reduce its diameter until the outer surface of the inner conductor is substantially smooth and the cross-section of the inner conductor is substantially circular, an outer conductor (406) concentrically around the inner conductor, and a dielectric (404) between the inner and outer conductors. The strands of the inner conductor may be a single metal or alloy wire, or may be plated wires. The outer conductors may be 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 the cross-section shape of the outer conductor. As a result of the different cross-sectional shapes, channels (410) are formed between the dielectric and the outer conductor to 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.
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