Schematic of a wave moving rightward down a lossless two-wire transmission line. Black dots represent electrons, and the arrows sh0w the electric field.
One of the most common types of transmission line, coaxial cable.
In radio-frequency engineering, a transmission line is a specialized cable or other structure designed to conduct alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account. Transmission lines are used for purposes such as connecting radio transmitters and receivers with their antennas (they are then called feed lines or feeders), distributing cable television signals, trunklines routing calls between telephone switching centres, computer network connections and high speed computer data buses.
azaya's proyect 