COAXIAL CABLE HAVING THIN STRONG NOBLE METAL PLATED INNER CONDUCTOR

• Main Authors: OHTSU; SHIGENOBU, YUTORI; TOSHIAKI
• Format: Patent
• Language: English
• Published: 08.09.1992
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CONDUCTORS; ELECTRICITY; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

A coaxial cable (3) comprises an inner conductor (12) consisting of a very fine metal wire (9) having a diameter of 120 mu m or below and a tensile strength of 981 N/mm or above, and a plated noble metal layer (11) coating the very fine metal wire, an insulating layer (13) of an insulating material coating the inner conductor, an outer conductor (14) coating the insulating layer, and a jacket (15) coating the outer conductor. In forming the inner conductor (12), a metal wire (9) is coated with a noble metal layer (11) by plating, and then the metal wire coated with the noble metal layer is subjected to plastic working to reduce the diameter and to improve the structure of the noble metal layer. A high-frequency signal applied to the coaxial cable (3) is transmitted through the noble metal layer of a satisfactory structure by skin effect without being disturbed. The very small diameter and very high tensile strength of the very fine metal wire (9) of the inner conductor (12) enables the coaxial cable to be formed in a very small diameter. Such performance and structure of the coaxial cable is advantageous in its application to electronic equipment including IC chip testers and high-speed electronic computer systems.