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Mast radiators can also be built as free-standing lattice towers, wide at the bottom for stability, narrowing to a slender mast. [4] The advantage of this construction is the elimination of guy lines and thus reduction in land area required. These towers can have a triangular or a square cross section, with each leg supported on an insulator.
A mast radiator or mast antenna is a radio tower or mast in which the whole structure is an antenna. Mast antennas are the transmitting antennas typical for long or medium wave broadcasting. Structurally, the only difference is that some mast radiators require the mast base to be insulated from the ground.
Mont Agel Broadcasting Mast 1946 France Fontbonne 145 m originally mast radiator with lattice tower as basement, today used for FM-/TV-broadcasting [6] Waldenburg TV Tower? Germany: Waldenburg 145 m antenna mast dismantled in 2009 Mekhzavod Radio Mast ? Russia Mekhzavod 142 m Mast radiator on small lattice tower [7] Sendeturm Jauerling: 1958 ...
A guyed radio mast. A guyed mast is a tall thin vertical structure that depends on guy lines (diagonal tensioned cables attached to the ground or a base) for stability. The mast itself has the compressive strength to support its own weight, but does not have the shear strength to stand unsupported or bear loads.
Replaced by four free-standing wooden lattice towers South Wellfleet, Cape Cod, Massachusetts, United States November 25, 1901: 20 wooden poles arranged in a circle 64 Storm Identical design to Poldhu installation. Replaced by 4 free-standing wooden lattice towers. Machrihanish, Scotland [1] December 5, 1906: Guyed steel tubular mast 128 Storm
The mast is resonant at the lengths where the reactance goes to zero. In an ideal thin monopole antenna these would be at a length of 0.25 λ {\displaystyle 0.25\lambda } anf 0.5 λ {\displaystyle 0.5\lambda } . but in actual mast radiators as shown here the thickness of the mast, and capacitance of guy wires and the base insulator causes ...
Modern folded unipole antenna with six skirt wires surrounding a round solid metal mast. The skirt wires are held away from the mast by stand-off posts with insulated ends. The folded unipole antenna is a type of monopole mast radiator antenna used as a transmitting antenna mainly in the medium wave band for AM radio broadcasting stations.
In a radio antenna, a parasitic element or passive radiator is a conductive element, typically a metal rod, which is not electrically connected to anything else. [1] Multielement antennas such as the Yagi–Uda antenna typically consist of a " driven element " which is connected to the radio receiver or transmitter through a feed line , and ...