transmission lines

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transmission lines

in an electric utility system. wires used to transmit electricity from generating stations to the distribution network or between distribution substations. often carrying in excess of 69.000 volts (contrast with distribution lines).

transmission lines
transmission lines (Wikipedia)
This article is about the radio-frequency transmission line. For the power transmission line, see electric power transmission. For acoustic transmission lines, used in some loudspeaker designs, see acoustic transmission line.
Schematic of a wave moving rightward down a lossless two-wire transmission line. Black dots represent electrons, and the arrows show the electric field.
One of the most common types of transmission line, coaxial cable.

In communications and electronic engineering, a transmission line is a specialized cable or other structure designed to carry 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, distributing cable television signals, trunklines routing calls between telephone switching centres, computer network connections and high speed computer data buses.

This article covers two-conductor transmission line such as parallel line (ladder line), coaxial cable, stripline, and microstrip. Some sources also refer to waveguide, dielectric waveguide, and even optical fibre as transmission line, however these lines require different analytical techniques and so are not covered by this article; see Waveguide (electromagnetism).

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By |2016-12-16T18:23:47+08:00December 16th, 2016|0 Comments

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