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Yagi antenna -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-05) |
 | | A Yagi-Uda Antenna, commonly known simply as a Yagi antenna, is a (An electrical device that sends or receives radio or television signals) antenna consisting of an array of a (A pair of equal and opposite electric charges or magnetic poles separated by a small distance) dipole and additional parasitic elements. |
 | | Yagi antennas which include one or more director elements, which, by virtue of their being arranged at approximately a quarter-wavelength mutual spacing and being progressively slightly shorter than a half wavelength, direct signals of increasingly higher frequencies onto the active dipole. |
 | | Yagi published the first English-language article on the antenna in 1928 and it came to be associated with his name. |
| www.absoluteastronomy.com /encyclopedia/y/ya/yagi_antenna.htm (407 words) |