7 Coaxial characteristic impedance derivationĬoaxial cable is used as a transmission line for radio frequency signals.It differs from other shielded cables because the dimensions of the cable and connectors are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a transmission line. It is used in such applications as telephone trunk lines, broadband internet networking cables, high-speed computer data busses, cable television signals, and connecting radio transmitters and receivers to their antennas. The term coaxial refers to the inner conductor and the outer shield sharing a geometric axis.Ĭoaxial cable is a type of transmission line, used to carry high-frequency electrical signals with low losses. æ k s/) is a type of electrical cable consisting of an inner conductor surrounded by a concentric conducting shield, with the two separated by a dielectric ( insulating material) many coaxial cables also have a protective outer sheath or jacket. RG-59 flexible coaxial cable composed of:Ĭoaxial cable, or coax (pronounced / ˈ k oʊ.
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