Μετάφραση και ανάλυση λέξεων από την τεχνητή νοημοσύνη ChatGPT
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- πώς χρησιμοποιείται η λέξη
- συχνότητα χρήσης
- χρησιμοποιείται πιο συχνά στον προφορικό ή γραπτό λόγο
- επιλογές μετάφρασης λέξεων
- παραδείγματα χρήσης (πολλές φράσεις με μετάφραση)
- ετυμολογία
Τι (ποιος) είναι umbrella-type antenna - ορισμός
![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")
![Olfactory receptors (scales and holes) on the antenna of the butterfly ''[[Aglais io]]'', electron micrograph](https://commons.wikimedia.org/wiki/Special:FilePath/Tykadlo.jpg?width=200 "Olfactory receptors (scales and holes) on the antenna of the butterfly ''[[Aglais io]]'', electron micrograph")
![Electron micrograph]] of antenna surface detail of a wasp ''([[Vespula vulgaris]])''](https://commons.wikimedia.org/wiki/Special:FilePath/Vespula vulgaris SEM Antenna 03.jpg?width=200 "Electron micrograph]] of antenna surface detail of a wasp ''([[Vespula vulgaris]])''")
Βικιπαίδεια
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.
