Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Horn_antenna> ?p ?o }
- 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, 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.
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- Horn_antenna wikiPageOutDegree "104".
- Horn_antenna wikiPageRevisionID "698382068".
- Horn_antenna wikiPageWikiLink AT&T_Communications.
- Horn_antenna wikiPageWikiLink Andover_Earth_Station.
- Horn_antenna wikiPageWikiLink Antenna_(radio).
- Horn_antenna wikiPageWikiLink Antenna_aperture.
- Horn_antenna wikiPageWikiLink Antenna_feed.
- Horn_antenna wikiPageWikiLink Antenna_gain.
- Horn_antenna wikiPageWikiLink Apex_(geometry).
- Horn_antenna wikiPageWikiLink Arno_Allan_Penzias.
- Horn_antenna wikiPageWikiLink Bandwidth_(signal_processing).
- Horn_antenna wikiPageWikiLink Beamwidth.
- Horn_antenna wikiPageWikiLink Bell_Labs.
- Horn_antenna wikiPageWikiLink Category:Radio_frequency_antenna_types.
- Horn_antenna wikiPageWikiLink Category:Telecommunications_equipment.
- Horn_antenna wikiPageWikiLink Coaxial_cable.
- Horn_antenna wikiPageWikiLink Communications_satellite.
- Horn_antenna wikiPageWikiLink Cone.
- Horn_antenna wikiPageWikiLink Cosmic_microwave_background.
- Horn_antenna wikiPageWikiLink Decibel.
- Horn_antenna wikiPageWikiLink Diffraction.
- Horn_antenna wikiPageWikiLink Directivity.
- Horn_antenna wikiPageWikiLink Electric_field.
- Horn_antenna wikiPageWikiLink Electromagnetic_radiation.
- Horn_antenna wikiPageWikiLink Exponential_function.
- Horn_antenna wikiPageWikiLink Feed_horn.
- Horn_antenna wikiPageWikiLink Frequency.
- Horn_antenna wikiPageWikiLink Harald_T._Friis.
- Horn_antenna wikiPageWikiLink Holmdel_Horn_Antenna.
- Horn_antenna wikiPageWikiLink Horn_(acoustic).
- Horn_antenna wikiPageWikiLink Impedance_matching.
- Horn_antenna wikiPageWikiLink Impedance_of_free_space.
- Horn_antenna wikiPageWikiLink Isotropic_radiator.
- Horn_antenna wikiPageWikiLink Jagadish_Chandra_Bose.
- Horn_antenna wikiPageWikiLink Magnetic_field.
- Horn_antenna wikiPageWikiLink Microwave.
- Horn_antenna wikiPageWikiLink Microwave_radiometer.
- Horn_antenna wikiPageWikiLink Monopole_antenna.
- Horn_antenna wikiPageWikiLink Nobel_Prize_in_Physics.
- Horn_antenna wikiPageWikiLink Ohm.
- Horn_antenna wikiPageWikiLink Parabolic_antenna.
- Horn_antenna wikiPageWikiLink Parabolic_reflector.
- Horn_antenna wikiPageWikiLink Phase_(waves).
- Horn_antenna wikiPageWikiLink Phase_center.
- Horn_antenna wikiPageWikiLink Radar.
- Horn_antenna wikiPageWikiLink Radar_gun.
- Horn_antenna wikiPageWikiLink Radiation_pattern.
- Horn_antenna wikiPageWikiLink Radio_receiver.
- Horn_antenna wikiPageWikiLink Radio_telescope.
- Horn_antenna wikiPageWikiLink Refractive_index.
- Horn_antenna wikiPageWikiLink Resonance.
- Horn_antenna wikiPageWikiLink Robert_Woodrow_Wilson.
- Horn_antenna wikiPageWikiLink Satellite_dish.
- Horn_antenna wikiPageWikiLink Side_lobe.
- Horn_antenna wikiPageWikiLink Sliding_door_operator.
- Horn_antenna wikiPageWikiLink Sound.
- Horn_antenna wikiPageWikiLink Standing_wave.
- Horn_antenna wikiPageWikiLink Standing_wave_ratio.
- Horn_antenna wikiPageWikiLink Telstar.
- Horn_antenna wikiPageWikiLink Transmission_line.
- Horn_antenna wikiPageWikiLink Transmitter.
- Horn_antenna wikiPageWikiLink Trumpet.
- Horn_antenna wikiPageWikiLink Ultra_high_frequency.
- Horn_antenna wikiPageWikiLink Wave_impedance.
- Horn_antenna wikiPageWikiLink Waveguide.
- Horn_antenna wikiPageWikiLink Wavelength.
- Horn_antenna wikiPageWikiLink File:ATM_Horn_Antennas.jpg.
- Horn_antenna wikiPageWikiLink File:Bocina_Cónica_Corrugada.JPG.
- Horn_antenna wikiPageWikiLink File:Cassegrain_85ft_antenna_Goldstone_Deep_Space_Center.jpg.
- Horn_antenna wikiPageWikiLink File:Green_Banks_-_Ewen-Purcell_Horn_Antenna.jpg.
- Horn_antenna wikiPageWikiLink File:Horn_antenna_types.svg.
- Horn_antenna wikiPageWikiLink File:Hughes_Direcway_LNB.jpg.
- Horn_antenna wikiPageWikiLink File:Rillenhorn.jpg.
- Horn_antenna wikiPageWikiLink File:Schwarzbeck_BBHA_9120_D.jpg.
- Horn_antenna wikiPageWikiLink File:Stacked_beam2.jpg.
- Horn_antenna wikiPageWikiLink File:Wilmer_Barrow_&_horn_antenna_1938.jpg.
- Horn_antenna wikiPageWikiLinkText "Corrugated Horn".
- Horn_antenna wikiPageWikiLinkText "Hogg horn antennas".
- Horn_antenna wikiPageWikiLinkText "Hogg or horn-reflector antenna".
- Horn_antenna wikiPageWikiLinkText "Horn antenna".
- Horn_antenna wikiPageWikiLinkText "Horn".
- Horn_antenna wikiPageWikiLinkText "antenna".
- Horn_antenna wikiPageWikiLinkText "corrugated horn".
- Horn_antenna wikiPageWikiLinkText "feed horn".
- Horn_antenna wikiPageWikiLinkText "feedhorn".
- Horn_antenna wikiPageWikiLinkText "horn aerials".
- Horn_antenna wikiPageWikiLinkText "horn antenna".
- Horn_antenna wikiPageWikiLinkText "horn reflector antenna".
- Horn_antenna wikiPageWikiLinkText "horn".
- Horn_antenna wikiPageWikiLinkText "horn-reflector antennas".
- Horn_antenna wikiPageWikiLinkText "horns".
- Horn_antenna wikiPageWikiLinkText "pyramidal electromagnetic horn".
- Horn_antenna align "center".