Waveguide (radio frequency)

Hollow metal pipe used to carry radio waves

In radio-frequency engineering and communications engineering, a waveguide is a hollow metal pipe used to carry radio waves. This type of waveguide is used as a transmission line mostly at microwave frequencies, for such purposes as connecting microwave transmitters and receivers to their antennas, in equipment such as microwave ovens, radar sets, satellite communications, and microwave radio links. The group velocity of guided electromagnetic waves (EMW) is a fraction of the speed of light.

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