Patent ID: 7795531

Claim:
A high-frequency coaxial cable comprising: an inner solid layer, a foamed resin insulation layer, an outer solid layer and an outer conductor sequentially formed on an outer periphery of an inner conductor, wherein the outer solid layer comprises a high-density polyethylene with a density of 0.960 g/cm 3 or more and a melt flow rate of 5 to 10 g/min, and a melting fracture tension of 10 to 50 mN, which is measured by using a capillary rheometer with a furnace body diameter of 9.55 mm under a condition of using a flat capillary with an inner diameter of 2.095 mm and a length of 8.03 mm with a piston speed of 10 mm/min at a temperature of 190° C. and a draw acceleration of 400 m/min 2 , and wherein the outer solid layer has a thickness of 0.1 mm to 0.2 mm, and a dielectric tangent of 1.0×10 −4 or less at 2 GHz.