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The antenna used for broadcasting through the 1920s was the T-antenna, which consisted of two masts with loading wires on top, strung between them, requiring twice the construction costs and land area of a single mast. [2] (pp 77–78) In 1924 Stuart Ballantine published two historic papers which led to the development of the single mast antenna.
Tower climbers may be injured or killed by falling objects, structural collapses and equipment failures. Some of the more frequently encountered hazards include falls from great heights; electrical hazards; hazards associated with hoisting personnel and equipment with base-mounted drum hoists; inclement weather; and structural collapse of towers.
An antenna tuner, a matchbox, transmatch, antenna tuning unit (ATU), antenna coupler, or feedline coupler is a device connected between a radio transmitter or receiver and its antenna to improve power transfer between them by matching the impedance of the radio to the antenna's feedline. Antenna tuners are particularly important for use with ...
The radiation pattern of a thin wire antenna is easily predictable using antenna modeling.For a straight wire, the radiation pattern can be described by axially symmetric multipole moments with no component along the wire direction; as the length of the wire is increased, higher multipole contributions become more prominent and multiple lobes (maxima) at angles to the antenna axis develop. [4]
An antenna farm, satellite dish farm or dish farm is an area dedicated to television or radio telecommunications transmitting or receiving antenna equipment, such as C, K u or K a band satellite dish antennas, UHF/VHF/AM/FM transmitter towers or mobile cell towers.
1. Ford F-150. Vehicles stolen in 2023: 15,852 Theft rate per 100K vehicles: 1,815 Average annual full-coverage insurance rate: $2,273 Ford pickups regularly land on the NICB’s list of the most ...
A patch antenna is a type of antenna with a low profile, usually consisting of a printed circuit board. It consists of a planar rectangular or circular sheet or "patch" of metal, mounted over a larger sheet of metal called a ground plane. It is the original type of microstrip antenna described by Howell in 1972. [1]
Top-notch earbuds on sale for $18 and a No. 1 bestselling wallet down to $10 — these gadgets and goodies are surefire holiday hits.
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