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Monopole antennas this short are inefficient; due to their low radiation resistance of 5 to 20 ohms, a large fraction of the transmitter power was wasted in the ground system resistance. [49] At this time the main technique known for increasing radiated power was to add conductors to the top of the antenna, to increase the capacitance to ground ...
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.
Carbon fibre monopoles and towers have traditionally been too expensive but recent developments in the way the carbon fibre tow is spun have resulted in solutions that offer strengths exceeding steel (10 times) for a fraction of the weight (70% less [9]) which has allowed monopoles and towers to be built in locations that were too expensive or ...
The 20-meter or 14-MHz amateur radio band is a portion of the shortwave radio spectrum, comprising frequencies stretching from 14.000 MHz to 14.350 MHz. [1] The 20-meter band is widely considered among the best for long-distance communication ( DXing ), and is one of the most popular—and crowded—during contests . [ 2 ]
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. It consists of a vertical metal rod or mast mounted over and connected at its base to a grounding system consisting of buried wires. The mast is surrounded by a "skirt" of ...
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 ...
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.
The whip antenna is a monopole antenna, and like a vertical dipole has an omnidirectional radiation pattern, radiating equal radio power in all azimuthal directions (perpendicular to the antenna's axis), with the radiated power falling off with elevation angle to zero on the antenna's axis. [1]