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In North America, for instance, there are transmitting antennas on the Empire State Building, the Willis Tower, Prudential Tower, 4 Times Square, and One World Trade Center. The North Tower of the original World Trade Center also had a 110-metre (360 ft) telecommunications antenna atop its roof, constructed in 1978–1979, and began ...
Radio masts and towers support antennas (also known as aerials) for telecommunications and broadcasting, including television. Subcategories This category has the following 4 subcategories, out of 4 total.
A whip antenna is an antenna consisting of a straight flexible wire or rod. The bottom end of the whip is connected to the radio receiver or transmitter. A whip antenna is a form of monopole antenna. The antenna is designed to be flexible so that it does not break easily, and the name is derived from the whip-like motion that it exhibits when ...
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Single-armed antennas, like a single "telescoping" antenna. At the lowest resonant frequency that arm is slightly under a quarter-wave long. Both dipoles and monopoles are often built large enough to be self-resonant; usually each arm is a quarter-wave long.
A mast radiator (or radiating tower) is a radio mast or tower in which the metal structure itself is energized and functions as an antenna. This design, first used widely in the 1930s, is commonly used for transmitting antennas operating at low frequencies , in the LF and MF bands, in particular those used for AM radio broadcasting stations.