Coaxial Cable

A coaxial cable or coax consists of an inner conductor which is surrounded by a tubular insulating material, with a high dielectric constant made from a flexible material. These are then surrounded by a conductive layer of fine woven wire or thin metallic foil and finally encased within a thin insulating layer on the outside. Coaxial cables are used as transmission lines for radio frequency signals such as connecting receivers to radio transmitters, and distributing cable television signals. Coaxial cables should not be confused with other types of shielded cables which transmit lower frequency signals, because such cables are not constructed to the precise specifications need to transmit radio frequencies.