HORN (TELECOMMUNICATIONS)

In telecommunications, the term 'horn' has the following meanings:

★ In radio transmission, an open-ended waveguide, of increasing cross-sectional area, which radiates directly in a desired direction or feeds a reflector that forms a desired beam.

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★ ''Note 1:'' Horns may have one or more expansion curves, i.e., longitudinal cross sections, such as elliptical, conical, hyperbolic, or parabolic curves, and not necessarily the same expansion curve in each (E-plane and H-plane) cross section.

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★ ''Note 2:'' A very wide range of beam patterns may be formed by controlling horn dimensions and shapes, placement of the reflector, and reflector shape and dimensions.

★ A portion of a waveguide in which the cross section is smoothly increased along the axial direction.

★ In audio systems, a tube, usually having a rectangular transverse cross section and a linearly or exponentially increasing cross-sectional area, used for radiating or receiving acoustic waves. ''(Source: from Federal Standard 1037C and from MIL-STD-188)''. These devices perform a mechanical impedance matching for acoustic energy.

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See also

See also

★ Feed horn

★ Horn (telescope)

★ Horn Antenna