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- Horn_antenna abstract "A horn antenna or microwave horn is an antenna that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave frequencies, above 300 MHz. They are used as feeders (called feed horns) for larger antenna structures such as parabolic antennas, as standard calibration antennas to measure the gain of other antennas, and as directive antennas for such devices as radar guns, automatic door openers, and microwave radiometers. Their advantages are moderate directivity (gain), low standing wave ratio (SWR), broad bandwidth, and simple construction and adjustment.One of the first horn antennas was constructed in 1897 by Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. In the 1930s the first experimental research (Southworth and Barrow, 1936) and theoretical analysis (Barrow and Chu, 1939) of horns as antennas was done. The development of radar in World War 2 stimulated horn research to design feed horns for radar antennas. The corrugated horn invented by Kay in 1962 has become widely used as a feed horn for microwave antennas such as satellite dishes and radio telescopes.An advantage of horn antennas is that since they have no resonant elements, they can operate over a wide range of frequencies, a wide bandwidth. The usable bandwidth of horn antennas is typically of the order of 10:1, and can be up to 20:1 (for example allowing it to operate from 1 GHz to 20 GHz). The input impedance is slowly varying over this wide frequency range, allowing low voltage standing wave ratio (VSWR) over the bandwidth. The gain of horn antennas ranges up to 25 dBi, with 10 - 20 dBi being typical.".
- Horn_antenna thumbnail Schwarzbeck_BBHA_9120_D.jpg?width=300.
- Horn_antenna wikiPageExternalLink p01.html.
- Horn_antenna wikiPageExternalLink horn.php.
- Horn_antenna wikiPageExternalLink patents?id=7mluAAAAEBAJ&printsec=frontcover&dq=2416675&hl=en&sa=X&ei=7hPwTs2FHIStiQLmypyaDg&ved=0CDMQ6AEwAA.
- Horn_antenna wikiPageID "1243766".
- Horn_antenna wikiPageRevisionID "603827088".
- Horn_antenna align "center".
- Horn_antenna caption "1960.0".
- Horn_antenna caption "50".
- Horn_antenna caption "AT&T Long-Lines KS-15656 C-band microwave relay horns on roof of AT&T telephone switching center, Seattle, Washington, USA".
- Horn_antenna footer "Horn-reflector antennas".
- Horn_antenna hasPhotoCollection Horn_antenna.
- Horn_antenna image "Hogg horn antennas.jpg".
- Horn_antenna image "Horn_Antenna-in_Holmdel,_New_Jersey.jpeg".
- Horn_antenna image "Relay 1 antenna USA.jpg".
- Horn_antenna width "120".
- Horn_antenna width "200".
- Horn_antenna width "270".
- Horn_antenna subject Category:Radio_frequency_antenna_types.
- Horn_antenna subject Category:Telecommunications_equipment.
- Horn_antenna comment "A horn antenna or microwave horn is an antenna that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave frequencies, above 300 MHz.".
- Horn_antenna label "Antena de bocina".
- Horn_antenna label "Antena tubowa".
- Horn_antenna label "Antenna a tromba".
- Horn_antenna label "Antenne cornet".
- Horn_antenna label "Hoornantenne".
- Horn_antenna label "Horn antenna".
- Horn_antenna label "Hornstrahler".
- Horn_antenna label "Рупорная антенна".
- Horn_antenna label "ホーンアンテナ".
- Horn_antenna sameAs Hornstrahler.
- Horn_antenna sameAs Antena_de_bocina.
- Horn_antenna sameAs Antenne_cornet.
- Horn_antenna sameAs Antenna_a_tromba.
- Horn_antenna sameAs ホーンアンテナ.
- Horn_antenna sameAs Hoornantenne.
- Horn_antenna sameAs Antena_tubowa.
- Horn_antenna sameAs m.04lmym.
- Horn_antenna sameAs Q759117.
- Horn_antenna sameAs Q759117.
- Horn_antenna wasDerivedFrom Horn_antenna?oldid=603827088.
- Horn_antenna depiction Schwarzbeck_BBHA_9120_D.jpg.
- Horn_antenna isPrimaryTopicOf Horn_antenna.