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- Beam_waveguide_antenna abstract "A beam waveguide antenna is a particular type of large steerable parabolic antenna in which the radio waves are transported in a beam between the movable dish and the stationary transmitter or receiver using multiple reflective surfaces.Beam waveguide antennas are used in large radio telescopes and satellite communication stations as an alternative to the most common parabolic antenna design, the conventional \"front fed\" parabolic antenna. In front feed, the antenna feed, the small antenna that transmits or receives the radio waves reflected by the dish, is suspended at the focus, in front of the dish. However, this location causes a number of practical difficulties. In high performance systems, complex transmitter and receiver electronics must be located at the feed antenna. This feed equipment usually requires high maintenance; some examples are water cooling for transmitters and cryogenic cooling for sensitive receivers. With the large dishes used in these systems, the focus is high off the ground, and servicing requires cranes or scaffolds, and outdoor work with delicate equipment high off the ground. Furthermore, the feeds themselves have to be designed to handle outdoor conditions such as rain and large temperature swings, and to work while tipped at any angle. The beam waveguide antenna addresses these problems by locating the feed antenna in a \"feed house\" at the base of the antenna, instead of in front of the dish. The radio waves collected by the dish are focused into a beam and reflected by metal surfaces in a path through the supporting structure to the stationary feed antenna at the base. The path is complicated because the beam must pass through both axes of the altazimuth mount of the antenna, so turning the antenna does not disturb the beam.".
- Beam_waveguide_antenna thumbnail Picture_bwg.gif?width=300.
- Beam_waveguide_antenna wikiPageID "31250782".
- Beam_waveguide_antenna wikiPageLength "5513".
- Beam_waveguide_antenna wikiPageOutDegree "20".
- Beam_waveguide_antenna wikiPageRevisionID "650858799".
- Beam_waveguide_antenna wikiPageWikiLink Altazimuth_mount.
- Beam_waveguide_antenna wikiPageWikiLink Antenna_(radio).
- Beam_waveguide_antenna wikiPageWikiLink Antenna_feed.
- Beam_waveguide_antenna wikiPageWikiLink Category:Radio_frequency_antenna_types.
- Beam_waveguide_antenna wikiPageWikiLink Communications_satellite.
- Beam_waveguide_antenna wikiPageWikiLink Cryogenics.
- Beam_waveguide_antenna wikiPageWikiLink Focus_(optics).
- Beam_waveguide_antenna wikiPageWikiLink JAXA.
- Beam_waveguide_antenna wikiPageWikiLink Jet_Propulsion_Laboratory.
- Beam_waveguide_antenna wikiPageWikiLink NASA_Deep_Space_Network.
- Beam_waveguide_antenna wikiPageWikiLink Parabolic_antenna.
- Beam_waveguide_antenna wikiPageWikiLink Radio_receiver.
- Beam_waveguide_antenna wikiPageWikiLink Radio_telescope.
- Beam_waveguide_antenna wikiPageWikiLink Reflector_(antenna).
- Beam_waveguide_antenna wikiPageWikiLink Satellite.
- Beam_waveguide_antenna wikiPageWikiLink Transmitter.
- Beam_waveguide_antenna wikiPageWikiLink Usuda_Deep_Space_Center.
- Beam_waveguide_antenna wikiPageWikiLink Water_cooling.
- Beam_waveguide_antenna wikiPageWikiLink File:FocusAccess.png.
- Beam_waveguide_antenna wikiPageWikiLink File:Picture_bwg.gif.
- Beam_waveguide_antenna wikiPageWikiLinkText "Beam waveguide antenna".
- Beam_waveguide_antenna wikiPageWikiLinkText "beam waveguide antenna".
- Beam_waveguide_antenna wikiPageUsesTemplate Template:Reflist.
- Beam_waveguide_antenna subject Category:Radio_frequency_antenna_types.
- Beam_waveguide_antenna hypernym Type.
- Beam_waveguide_antenna comment "A beam waveguide antenna is a particular type of large steerable parabolic antenna in which the radio waves are transported in a beam between the movable dish and the stationary transmitter or receiver using multiple reflective surfaces.Beam waveguide antennas are used in large radio telescopes and satellite communication stations as an alternative to the most common parabolic antenna design, the conventional \"front fed\" parabolic antenna.".
- Beam_waveguide_antenna label "Beam waveguide antenna".
- Beam_waveguide_antenna sameAs Q4876195.
- Beam_waveguide_antenna sameAs آنتن_پرتو_موجبر.
- Beam_waveguide_antenna sameAs m.0gjd_0h.
- Beam_waveguide_antenna sameAs Q4876195.
- Beam_waveguide_antenna wasDerivedFrom Beam_waveguide_antenna?oldid=650858799.
- Beam_waveguide_antenna depiction Picture_bwg.gif.
- Beam_waveguide_antenna isPrimaryTopicOf Beam_waveguide_antenna.