Hollow core body and the production manner, and coaxial cable and that production manner for coaxial cable

摘要

P To enhance strength of an insulator of a hollow core body to prevent degradation of electric characteristics due to collapse of the insulator. PSOLUTION: In the manufacturing method of a hollow core body 1 for a coaxial cable provided with an insulator 3 having an inner side insulation layer 3A for covering an inner conductor 2 ON an outer circumference of the inner conductor 2, ribs 3r extending from the inner side insulation layer 3A radially, and an outer side insulation layer 3C of a cylindrical shape to be connected with an outer end of a rib 3r and it is established that a thickness Ti of the inner side insulation layer 3A a thickness Tr of the rib 3r a thickness To of the outer side insulation layer 3C in a state that the diameter and electric characteristics of the insulator 3 are to be constant. PCOPYRIGHT: (C)2011 and JPO& INPIT