Horn (telecommunications)
- 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.
** "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.
** "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.
ee also
*Feed horn
*Horn (telescope)
*Horn Antenna
External links
* [http://www.antenna-theory.com/antennas/aperture/horn.php Horn Antennas] Antenna-Theory.com
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