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The monopole antenna was invented in 1895 by radio pioneer Guglielmo Marconi; for this reason it is sometimes called the Marconi antenna. [4] [5] [6] The load impedance of the quarter-wave monopole is half that of the dipole antenna or 37.5 ohms. Common types of monopole antenna are
The terms "mast" and "tower" are often used interchangeably. However, in structural engineering terms, a tower is a self-supporting or cantilevered structure, while a mast is held up by stays or guy-wires. [1] A mast is a guyed mast, a thin structure without the shear strength to stand unsupported, that uses attached guy lines for stability ...
The subsection that follows next describes how surrounding skirt wires are added to convert an ordinary broadcast tower into a folded unipole. The picture at the right shows a small folded unipole antenna constructed from an existing triangular monopole tower; it has only three vertical wires comprising its "skirt".
Amid an ongoing effort by some residents to halt any new construction of small cell wireless communication towers in town, an application to build a monopole communication tower on land owned by ...
400-foot transmitter tower located on Averil Peak, NY completely collapsed as a result of accumulation of ice and snow from the April 2007 Nor'easter. Partially damaged the transmitter building at the base. New tower erected and back in service Oct, 9 2007. Browns Summit Crown Castle Broadcasting Tower, Browns Summit, Texas, US May 29, 2007
People run away as the second tower of World Trade Center crumbles down after a plane hit the building September 11, 2001, in New York City. ... and Jamie Otten look at news photos of the attacks ...
A fan monopole, or multi-monopole is a half of a fan dipole: It combines several different-sized monopole antennas, all sharing the same feedpoint, with each sized to transmit well on a different band or sub-band. Like all monopoles, it requires a ground system to function.
More than 300 people in the Palomar area signed a petition protesting the location of a 125-feet cell phone tower at the corner of Man O War and Fort Harrods Road. ‘Our hands are tied.’