File:Graph of base impedance of mast radiator antenna.png
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DescriptionGraph of base impedance of mast radiator antenna.png |
English: Graph of the measured base feed resistance and reactance of a typical mast radiator antenna vs the height of the mast. A mast radiator antenna consists of a guyed lattice mast in which the steel mast structure itself is connected to the transmitter and functions as the antenna. It is mounted on a ceramic insulator which keeps it isolated from the ground, and fed between the bottom of the mast and the a buried copper wire ground system. They are the most widely used antennas for AM radio stations in the medium frequency band. 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 anf . but in actual mast radiators as shown here the nonideal character causes resonance to occur at considerably lower frequencies. The most common mast lengths used are (225°) at which horizontal (ground wave) radiation is maximum, and (190°) at which fading is minimum |
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Source | Own work |
Author | Chetvorno |
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I, the copyright holder of this work, hereby publish it under the following license:
This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:38, 30 April 2020 | 813 × 884 (38 KB) | Chetvorno (talk | contribs) | Uploaded own work with UploadWizard |
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