Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Directional_antenna> ?p ?o }
- Directional_antenna abstract "A directional antenna or beam antenna is an antenna which radiates or receives greater power in specific directions allowing for increased performance and reduced interference from unwanted sources.Directional antennas provide increased performance over dipole antennas – or omnidirectional antennas in general – when a greater concentration of radiation in a certain direction is desired.A high-gain antenna (HGA) is a directional antenna with a focused, narrow radiowave beam width. This narrow beam width allows more precise targeting of the radio signals. Most commonly referred to during space missions, these antennas are also in use all over Earth, most successfully in flat, open areas where no mountains lie to disrupt radiowaves. By contrast, a low-gain antenna (LGA) is an omnidirectional antenna with a broad radiowave beam width, that allows for the signal to propagate reasonably well even in mountainous regions and is thus more reliable regardless of terrain. Low gain antennas are often used in spacecraft as a backup to the high-gain antenna, which transmits a much narrower beam and is therefore susceptible to loss of signal.All practical antennas are at least somewhat directional, although usually only the direction in the plane parallel to the earth is considered, and practical antennas can easily be omnidirectional in one plane. The most common types are the Yagi antenna, the log-periodic antenna, and the corner reflector antenna, which are frequently combined and commercially sold as residential TV antennas. Cellular repeaters often make use of external directional antennas to give a far greater signal than can be obtained on a standard cell phone. Satellite Television receivers usually use parabolic antennas. For long and medium wavelength frequencies, tower arrays are used in most cases as directional antennas.".
- Directional_antenna thumbnail LPDA-large.jpg?width=300.
- Directional_antenna wikiPageExternalLink AerialGainCurves.
- Directional_antenna wikiPageExternalLink LowGainAerialAcceptanceAngle.
- Directional_antenna wikiPageExternalLink 2-what-are-high-and-low-gain.html.
- Directional_antenna wikiPageID "342371".
- Directional_antenna wikiPageLength "9101".
- Directional_antenna wikiPageOutDegree "62".
- Directional_antenna wikiPageRevisionID "688226126".
- Directional_antenna wikiPageWikiLink Amateur_radio_direction_finding.
- Directional_antenna wikiPageWikiLink Antenna_(radio).
- Directional_antenna wikiPageWikiLink Antenna_gain.
- Directional_antenna wikiPageWikiLink Arecibo_Observatory.
- Directional_antenna wikiPageWikiLink Cantenna.
- Directional_antenna wikiPageWikiLink Cardioid.
- Directional_antenna wikiPageWikiLink Cassegrain_antenna.
- Directional_antenna wikiPageWikiLink Cassegrain_reflector.
- Directional_antenna wikiPageWikiLink Category:Radio_frequency_antenna_types.
- Directional_antenna wikiPageWikiLink Category:Radio_frequency_propagation.
- Directional_antenna wikiPageWikiLink Cellular_repeater.
- Directional_antenna wikiPageWikiLink Corner_reflector_antenna.
- Directional_antenna wikiPageWikiLink Cosmic_background_radiation.
- Directional_antenna wikiPageWikiLink Decibel.
- Directional_antenna wikiPageWikiLink Diffraction.
- Directional_antenna wikiPageWikiLink Dipole_antenna.
- Directional_antenna wikiPageWikiLink Earth.
- Directional_antenna wikiPageWikiLink Ferrite_core.
- Directional_antenna wikiPageWikiLink Frequency.
- Directional_antenna wikiPageWikiLink Goldstone_Deep_Space_Communications_Complex.
- Directional_antenna wikiPageWikiLink Helical_antenna.
- Directional_antenna wikiPageWikiLink Holmdel_Horn_Antenna.
- Directional_antenna wikiPageWikiLink Holmdel_Township,_New_Jersey.
- Directional_antenna wikiPageWikiLink Horn_antenna.
- Directional_antenna wikiPageWikiLink Interference_(communication).
- Directional_antenna wikiPageWikiLink Isotropic_radiator.
- Directional_antenna wikiPageWikiLink Log-periodic_antenna.
- Directional_antenna wikiPageWikiLink Loop_antenna.
- Directional_antenna wikiPageWikiLink Mobile_phone.
- Directional_antenna wikiPageWikiLink NASA_Deep_Space_Network.
- Directional_antenna wikiPageWikiLink Omnidirectional_antenna.
- Directional_antenna wikiPageWikiLink Parabolic_antenna.
- Directional_antenna wikiPageWikiLink Phased_array.
- Directional_antenna wikiPageWikiLink Project_Echo.
- Directional_antenna wikiPageWikiLink Radiation.
- Directional_antenna wikiPageWikiLink Radio_direction_finder.
- Directional_antenna wikiPageWikiLink Radio_propagation_model.
- Directional_antenna wikiPageWikiLink Reciprocity_(electromagnetism).
- Directional_antenna wikiPageWikiLink Satellite_television.
- Directional_antenna wikiPageWikiLink Space_exploration.
- Directional_antenna wikiPageWikiLink Spacecraft.
- Directional_antenna wikiPageWikiLink Television_antenna.
- Directional_antenna wikiPageWikiLink Tower_array.
- Directional_antenna wikiPageWikiLink Voyager_2.
- Directional_antenna wikiPageWikiLink Wavelength.
- Directional_antenna wikiPageWikiLink Yagi-Uda_antenna.
- Directional_antenna wikiPageWikiLinkText "(DA)".
- Directional_antenna wikiPageWikiLinkText "Directional antenna".
- Directional_antenna wikiPageWikiLinkText "Directional".
- Directional_antenna wikiPageWikiLinkText "Directive".
- Directional_antenna wikiPageWikiLinkText "Radiating Pattern".
- Directional_antenna wikiPageWikiLinkText "antenna directivity".
- Directional_antenna wikiPageWikiLinkText "antenna".
- Directional_antenna wikiPageWikiLinkText "beam antennas".
- Directional_antenna wikiPageWikiLinkText "direction".
- Directional_antenna wikiPageWikiLinkText "directional antenna".
- Directional_antenna wikiPageWikiLinkText "directional radio antenna".
- Directional_antenna wikiPageWikiLinkText "directional signal".
- Directional_antenna wikiPageWikiLinkText "directional".
- Directional_antenna wikiPageWikiLinkText "directionality".
- Directional_antenna wikiPageWikiLinkText "directive antenna".
- Directional_antenna wikiPageWikiLinkText "directive".
- Directional_antenna wikiPageWikiLinkText "directivity".
- Directional_antenna wikiPageWikiLinkText "high gain".
- Directional_antenna wikiPageWikiLinkText "high-gain parabolic antenna".
- Directional_antenna wikiPageWikiLinkText "high-gain".
- Directional_antenna wikiPageWikiLinkText "highly directional".
- Directional_antenna wikiPageWikiLinkText "parabolic dish antenna".
- Directional_antenna wikiPageWikiLinkText "parallel antennas".
- Directional_antenna wikiPageWikiLinkText "unidirectional".
- Directional_antenna align "right".
- Directional_antenna caption "A 70-meter Cassegrain radio antenna at GDSCC, California".
- Directional_antenna caption "A multi-element, log-periodic dipole array".
- Directional_antenna direction "horizontal".
- Directional_antenna image "DSN Antenna details.jpg".
- Directional_antenna image "LPDA-large.jpg".
- Directional_antenna width "142".
- Directional_antenna width "170".
- Directional_antenna wikiPageUsesTemplate Template:Antenna_Types.
- Directional_antenna wikiPageUsesTemplate Template:Div_col_end.
- Directional_antenna wikiPageUsesTemplate Template:Div_col_start.
- Directional_antenna wikiPageUsesTemplate Template:Multiple_image.
- Directional_antenna wikiPageUsesTemplate Template:Reflist.
- Directional_antenna subject Category:Radio_frequency_antenna_types.
- Directional_antenna subject Category:Radio_frequency_propagation.
- Directional_antenna hypernym Antenna.
- Directional_antenna type Building.
- Directional_antenna comment "A directional antenna or beam antenna is an antenna which radiates or receives greater power in specific directions allowing for increased performance and reduced interference from unwanted sources.Directional antennas provide increased performance over dipole antennas – or omnidirectional antennas in general – when a greater concentration of radiation in a certain direction is desired.A high-gain antenna (HGA) is a directional antenna with a focused, narrow radiowave beam width.".
- Directional_antenna label "Directional antenna".
- Directional_antenna sameAs Q769152.
- Directional_antenna sameAs Richtantenne.