Cassegrain antennas

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• Cassegrain — [kas′ə grān΄] adj. of an arrangement of mirrors, lenses, etc. used in reflecting telescopes and microwave antennas, having its focus or transmission point near or behind the center of the main mirror Cassegrainian adj. * * * …   Universalium

• Cassegrain — [kas′ə grān΄] adj. of an arrangement of mirrors, lenses, etc. used in reflecting telescopes and microwave antennas, having its focus or transmission point near or behind the center of the main mirror Cassegrainian adj …   English World dictionary

• Cassegrain reflector — The Cassegrain reflector is a combination of two coaxial reflectors used in Cassegrain telescopes and radio antennas.First developed in 1672 by Laurent Cassegrain, this reflector is a combination of a primary concave mirror and a secondary convex …   Wikipedia

• Ryle Telescope — The Ryle Telescope (named after Martin Ryle, and formerly the 5 km Array ) was a linear east west radio telescope array at the Mullard Radio Astronomy Observatory. In 2004 three of the telescopes were moved to create a compact two dimensional… …   Wikipedia

• Parabolic antenna — A parabolic satellite communications antenna at Erdfunkstelle Raisting, the biggest facility for satellite communication in the world, in Raisting, Bavaria, Germany. It has a Cassegrain type feed. A parabolic antenna is an antenna that uses a… …   Wikipedia

• telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… …   Universalium

• Antena — Saltar a navegación, búsqueda Para otros usos de este término, véase Antena (desambiguación). Antena de onda corta Cortina , Moosbrunn, Austria …   Wikipedia Español

• Galileo (spacecraft) — Infobox Spacecraft Name = Galileo Orbiter Caption = Galileo is prepared for mating with the IUS booster Organization = NASA Major Contractors = Mission Type = Orbiter, fly by Flyby Of = Venus, Earth, 951 Gaspra, 243 Ida Satellite Of = Jupiter… …   Wikipedia

• Directional antenna — Log periodic dipole array A directional antenna or beam antenna is an antenna which radiates greater power in one or more directions allowing for increased performance on transmit and receive and reduced interference from unwanted sources.… …   Wikipedia

• Antenna farm — The dish farm at the Raisting Satellite Earth Station complex and Telehouse, Germany s largest satellite communications facility in Raisting, Bavaria, Germany. Antenna farm or satellite dish farm or just dish farm are terms used to describe an… …   Wikipedia

• Satellite dish — A C band satellite dish …   Wikipedia