umbrella antenna - traducción al griego
![radio navigation]] system, Tsushima, Japan, 389 meters, built 1973. Transmitted on 10–14 kHz.](https://commons.wikimedia.org/wiki/Special:FilePath/Tsushima Omega Tower 1977 2.jpg?width=200 "radio navigation]] system, Tsushima, Japan, 389 meters, built 1973. Transmitted on 10–14 kHz.")
![Antenna of Radio Televisyen Malaysia (RTM), [[Tuaran]], Sabah district, Malaysia](https://commons.wikimedia.org/wiki/Special:FilePath/Tuaran Sabah RTM-Antenna-Farm-01.jpg?width=200 "Antenna of Radio Televisyen Malaysia (RTM), [[Tuaran]], Sabah district, Malaysia")
![Omega]] Station E 428 meter antenna at Chabrier, [[Réunion island]].](https://commons.wikimedia.org/wiki/Special:FilePath/Antenne Oméga - Ile de la Réunion.png?width=200 "Omega]] Station E 428 meter antenna at Chabrier, [[Réunion island]].")
![Omega]] antenna, Victoria, Australia, showing insulators attaching the 16 umbrella wires to the mast](https://commons.wikimedia.org/wiki/Special:FilePath/Woodside VLF Transmitter - top of mast.jpg?width=200 "Omega]] antenna, Victoria, Australia, showing insulators attaching the 16 umbrella wires to the mast")
![base station]] antennas](https://commons.wikimedia.org/wiki/Special:FilePath/6 sector site in CDMA.jpg?width=200 "base station]] antennas")
![Typical center-loaded mobile CB antenna with [[loading coil]]](https://commons.wikimedia.org/wiki/Special:FilePath/CB antenna.jpg?width=200 "Typical center-loaded mobile CB antenna with [[loading coil]]")
![An automobile's [[whip antenna]], a common example of an omnidirectional antenna.](https://commons.wikimedia.org/wiki/Special:FilePath/Car radio antenna extended portrait.jpeg?width=200 "An automobile's [[whip antenna]], a common example of an omnidirectional antenna.")
![Diagram of the [[electric field]]s (''<span style="color:blue;">'''blue'''</span>'') and [[magnetic field]]s (''<span style="color:red;">'''red'''</span>'') radiated by a [[dipole antenna]] ('' '''black''' rods'') during transmission.](https://commons.wikimedia.org/wiki/Special:FilePath/Felder um Dipol.jpg?width=200 "Diagram of the [[electric field]]s (''<span style=\"color:blue;\">'''blue'''</span>'') and [[magnetic field]]s (''<span style=\"color:red;\">'''red'''</span>'') radiated by a [[dipole antenna]] ('' '''black''' rods'') during transmission.")
![Half-wave [[dipole antenna]]](https://commons.wikimedia.org/wiki/Special:FilePath/Half – Wave Dipole.jpg?width=200 "Half-wave [[dipole antenna]]")
 by night under the Magellanic Clouds.jpg?width=200 "df=dmy-all}}</ref>")
Definición
Wikipedia
An umbrella antenna is a capacitively top-loaded wire monopole antenna, consisting in most cases of a mast fed at the ground end, to which a number of radial wires are connected at the top, sloping downwards. They are used as transmitting antennas below 1 MHz, in the MF, LF and particularly the VLF bands, at frequencies sufficiently low that it is impractical or infeasible to build a full size quarter-wave monopole antenna. The outer end of each radial wire, sloping down from the top of the antenna, is connected by an insulator to a supporting rope or (usually) insulated cable anchored to the ground; the radial wires can also support the mast as guy wires. The radial wires make the antenna look like the wire frame of a giant umbrella (without the cloth) hence the name.
