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File:Umbrella antenna diagram.svg

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Original file(SVG file, nominally 519 × 443 pixels, file size: 17 KB)

Summary

Description
English: Diagram of an umbrella antenna, a toploaded wire transmitting antenna used in the medium frequency (MF), low frequency (LF) and very low frequency (VLF) bands. It consists of a steel mast (grey) insulated from the ground, with diagonal wires radiating from the top, anchored to the ground in a circle around it. The feedline from the transmitter is connected to the bottom of the mast. The wires have insulators (brown) in their lower part to prevent the voltage from reaching the ground. The vertical mast acts as the radiating antenna radiating the radio waves, and it's base is supported on a ceramic insulator (brown) to isolate it from the ground. The diagonal wires act as a capacitive topload, increasing the current in the mast, to increase the power radiated by the antenna. The wires also act as guy lines to support the antenna.
Date 9 June 2020
Source Own work
Author Chetvorno

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

Captions

Diagram of an umbrella antenna

9 June 2020

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current17:46, 31 August 2020Thumbnail for version as of 17:46, 31 August 2020519 × 443 (17 KB)ChetvornoShortened topload wires to a length more typical of actual umbrella antennas.
17:44, 9 June 2020Thumbnail for version as of 17:44, 9 June 2020519 × 443 (14 KB)ChetvornoUploaded own work with UploadWizard
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