coaxial cable

coaxial cable

Self-shielded cable used for transmission of communications signals, such as those for television, telephone, or computer networks. A coaxial cable consists of two conductors laid concentrically along the same axis. One conducting wire is surrounded by a dielectric insulator, which is in turn surrounded by the other, outer conductor, producing an electrically shielded transmission circuit. The whole cable is wrapped in a protective plastic sheathing. The signal propagates within the dielectric insulator, while the associated current flow is restricted to adjacent surfaces of the inner and outer conductors. As a result, coaxial cable has very low radiation losses and low susceptibility to external interference.


coaxial cable or coax

This entry comes from Encyclopædia Britannica Concise.
For the full entry on coaxial cable, visit

Seen & Heard

What made you look up coaxial cable? Please tell us what you were reading, watching or discussing that led you here.