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In this circumstance, a ‘T’-antenna is a capacitively top-loaded, electrically short, vertical monopole. [4]: 578–579 Despite its improvements over a short vertical, the typical ‘T’-antenna is still not as efficient as a full-height 1 / 4 λ [c] vertical monopole, [5] and has a higher Q and thus a narrower bandwidth.
To increase the radiation resistance, VLF transmitters use huge capacitively top-loaded antennas such as umbrella antennas and flattop antennas, in which an aerial network of horizontal wires is attached to the top of the vertical radiator to make a 'capacitor plate' to ground, to increase the current in the vertical radiator. However this can ...
AN/FPS-17 antennas at Shemya, Alaska. The AN/FPS-17 was a ground-based fixed-beam radar system that was installed at three locations worldwide, including Pirinçlik Air Base (formerly Diyarbakir Air Station) in south-eastern Turkey, Laredo, Texas and Shemya Island, Alaska.
Typical mast radiator of a commercial medium wave AM broadcasting station, Chapel Hill, North Carolina, U.S. Medium wave (MW) is a part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with more limited sound quality than FM stations on the FM broadcast band. During the ...
The Type 82 was designed to measure bearing, range and elevation with enough accuracy to place a target return within a 1,500 foot (460 m) box. [13] In testing, it demonstrated a 95% chance of placing the target within 650 yards (590 m) horizontally, and 550 yards (500 m) in altitude.
Underfloor heating pipes, before they are covered by the screed. Underfloor heating and cooling is a form of central heating and cooling that achieves indoor climate control for thermal comfort using hydronic or electrical heating elements embedded in a floor.