horn antenna


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

horn antenna

See waveguide.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Horn Antenna

 

an antenna consisting of a widening metal funnel—the horn—and a wave guide coupled to it. Horn antennas are used for the directional radiation and reception of radio waves in the superhigh-frequency range and as radiators for lens and reflector antennas; they are also used as self-contained antennas in communications satellites and in equipment used in measurement technology. The radiation pattern of a horn antenna depends on the character of the field strength distribution at the mouth (the largest cross section) of the horn, which, in turn, is determined by the shape of the inner and outer surfaces of the horn and by the horn’s geometric dimensions.

Figure 1. Types of horn antennas: (a) pyramidal, (b) sectoral, (c) conical, (d) horn with a parabolic generatrix; (1) wave guide, (2) horn

Horns are classified according to shape as pyramidal (Figure 1, a), sectoral (Figure 1, b), and conical (Figure l, c). Others are versions of these three basic types and include, for example, antennas with a generatrix in the form of a broken line or a smooth curve and antennas with a smooth or a corrugated inner surface. Various versions are used to improve one or another of the antenna’s electrical characteristics, for example, to obtain a radiation pattern that is axially symmetrical or has low power levels in the side lobes. In some cases, a delay or accelerating lens is placed at the mouth of a horn antenna in order to correct the antenna’s directional properties (seeLENS ANTENNA). For the best match between a horn antenna and its wave guide and between the antenna and free space, a matching section and tuning elements are sometimes provided, and the surface of the horn has a parabolic generatrix (Figure 1, d).

REFERENCES

Aizenberg, G. Z. Antenny uïtrakorotkikh voln [part 1]. Moscow, 1957.
Fradin, A. Z. Antenny sverkhvysokikh chastot. Moscow, 1957.
Kühn, R. Mikrovolnovye antenny. [Leningrad] 1967. [Translated from German.]

O. P. FROLOV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

horn antenna

[′hȯrn an′ten·ə]
(electromagnetism)
A microwave antenna produced by flaring out the end of a circular or rectangular waveguide into the shape of a horn, for radiating radio waves directly into space. Also known as electromagnetic horn; flare (British usage); hoghorn antenna (British usage); horn; horn radiator.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
After that, the sample is placed between the two horn antennas and the S-parameters are measured via VNA.
By using the aperture integration method, the far-zone fields for the conical horn antenna on an infinite ground plane are given by
Choi, "Design of an ultra-wideband tem horn antenna with a microstrip-type balun," IEEE Transactions on Antennas and Propagation, Vol.
I grew up in Keyport, New Jersey, a town right next door to Holmdel, where the Horn Antenna was used by Robert Wilson and Arno Penzias to discover the background radiation of the Big Bang.
At once more ambiguous and more fully itself than Horn Antenna, Horn Perspective also comes closer to immersing us in an alternate world.
A vector network analyzer (HP 8753D) was used to determine the frequency response and the impulse response of the both RF blocks (Tx + Rx) including LOS channel, using horn antennas. In this good propagation conditions, the measured response allows to estimate the system bandwidth and the RF components imperfections.
Various types of antennas offering wide bandwidth and high gain have been discussed in literature, including the dielectric rod antenna, spiral antenna, horn antenna, and log periodic antenna [22-25].
The horn antenna is equipped with a precision N-type female connector and a mounting bracket that enables the user to switch between vertical and horizontal polarisations.
Primarily intended for EMC test applications, the AM0.2-2HA open-sided, linearly polarized horn antenna operates over the 200-MHz to 2-GHz frequency range.
Dispersive or non-dispersive antennas have been commonly used for GPR systems, such as dipole antenna, Bow-tie antenna, TEM horn antenna, Vivaldi or tapered slot antenna (TSA), and equiangular spiral antenna [2].
Made by graded photonic crystal, the gradient-index lens can lead to high gain and low sidelobes with this lens placed inside a horn antenna [5].
A double ridge guide horn antenna has been used as a reference antenna.