| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-speed differential cable excellent in transmission characteristics. SOLUTION: In the high-speed differential cable 1, two signal lines are arranged in parallel as two cores and with a first dielectric layer 12 provided on an outer periphery of an internal conductor 11, a second dielectric layer 13 is provided on an outer periphery of the two-core signal lines, drain lines 14 are arranged in parallel with a signal line on either side of the two-core signal lines to be outside the second dielectric layer, an outer conductor 15 with an insulation side to be outside and a conductor to be inside is provided vertically on an outer periphery of the second dielectric layer and the drain line, an outer cover 16 is provided on an outer periphery of the outer conductor, and a groove part 17 for a drain line, insertion-coupled with at least a part of a circumference of the drain line, is provided in an outer peripheral part of the second dielectric layer with the drain line arranged. Hence, the signal line and the drain line are precisely arranged in symmetry, an electric balance of the two cores of the sinal line are electrically well balanced, and therefore, excellent electric characteristics and transmission characteristics are obtained. Since the outer conductor is provided vertically, generation of sack-out of attenuation in a high-frequency region is prevented. COPYRIGHT: (C)2010,JPO&INPIT |
