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Last update: Saturday 20th of March 2010 Antenna![]() An antenna is a transducer designed to transmit or receive radio waves which are a class of electromagnetic waves. In other words, antennas convert radio frequency electrical currents into electromagnetic waves and vice versa. Antennas are used in systems such as radio and television broadcasting, point-to-point radio communication, wireless LAN, radar, and space exploration. Antennas usually work in air or outer space, but can also be operated under water or even through soil and rock at certain frequencies for short distances. Physically, an antenna is an arrangement of conductors that generate a radiating electromagnetic field in response to an applied alternating voltage and the associated alternating electric current, or can be placed in an electromagnetic field so that the field will induce an alternating current in the antenna and a voltage between its terminals. Some antenna devices (parabola, horn antenna) just adapt the free space to another type of antenna. Thomas Edison used antennas by 1885. Edison patented his system in U.S. Patent 465,971 . Antennas were also used in 1888 by Heinrich Hertz (1857-1894) to prove the existence of electromagnetic waves predicted by the theory of James Clerk Maxwell. Hertz placed the emitter dipole in the focal point of a parabolic reflector. He published his work and installation drawings in Annalen der Physik und Chemie (vol. 36, 1889). Antenna Mp3 DownloadsDownload audio files (mp3 and wma) with Antenna Songs using these download websites. The list will be updated perciodically.Antenna RingtonesYou can get any Antenna ringtone you like (realtone, polyphonic, mono tone, mp3 ringtone) using the next service:
Pick Carrier, Confirm your Phone number and choose the ringtones you want to receive Antenna Music VideosMusic Plate music videos with myspace codes, see Antenna music videos section search for music videos and get your myspace music code.Antenna LyricsGet full Antenna lyrics on music plate Antenna lyrics page. Use the search option if the target page is not correctly displayed.
Antenna in the news
2008 Ford Expedition you can sellect 16 models now - Safety Canopy(TM) Front and Rear Side Head Curtain Airbags Front Power 343-mm X 34-mm Ventilated Disc and Rear Power 335-mm X 22-mm Ventilated Disc Brakes In-Glass Radio Antenna February 21, 2004--Wifi-Plus Inc. - Advanced MP Antenna Solutions - announces a next generation of antenna design and has created a single feed antenna solution for the WiMax 802.16A standard radios and chipsets. The single antenna can be used with any frequency from 2Ghz through 10Ghz, we call it continuous banded. KVH Industries offers pricey broadband for wealthy individuals on the go. Though they do offer some in-car broadband solutions, their primary focus is offering broadband services to boat or RV owners. The company has announced they've unveiled a new service, delivered via 24" TracPhone V7 antennas: At least when you're in the middle of the Atlantic
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