Coaxial Cable

Applications

Coaxial cable is used as a transmission line for radio frequency signals. Its applications include feedlines connecting radio transmitters and receivers with their antennas, computer network (Internet) connections, digital audio (S/PDIF), and distributing cable television signals.

Description of Coaxial Cable

Coaxial cable conducts electrical signal using an inner conductor (usually a solid copper, stranded copper or copper plated steel wire) surrounded by an insulating layer and all enclosed by a shield, typically one to four layers of woven metallic braid and metallic tape. The cable is protected by an outer insulating jacket.

Technical Characteristics

• Characteristic Impedance: Determined by the dielectric constant of the inner insulator and the radii of the inner and outer conductors.
• Attenuation: Varies as a function of frequency.
• Voltage Handling: Capability depends on construction.
• Shield Quality: Affects signal protection from external interference.

Common Applications

• Video and CATV distribution
• RF and microwave transmission
• Computer and instrumentation data connections