File:J-pole antenna showing standing waves 1.svg
Original file (SVG file, nominally 213 × 401 pixels, file size: 12 KB)
Captions
Summary
[edit]DescriptionJ-pole antenna showing standing waves 1.svg |
English: Diagram of a J-pole antenna, a vertical end-fed half-wave omnidirectional transmitting antenna used in the shortwave frequency bands. The diagram shows the standing waves of voltage (V, red bands) and current (I, blue bands) on the antenna elements. It consists of a vertical element a half wavelength () long, fed in series with a quarter wavelength () transmission line stub, with the parallel wire feedline (F) from the transmitter attached along the stub. The stub serves as an impedance matching device to transform the high feedpoint impedance of the half-wave antenna down to match the impedance of the feedline, so the antenna will absorb and radiate all the power from the transmitter without reflections. |
Date | |
Source | Own work |
Author | Chetvorno |
Licensing
[edit]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.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:16, 28 October 2021 | 213 × 401 (12 KB) | Chetvorno (talk | contribs) | Lightened the voltage and current bands, and tweaked the shape slightly | |
19:25, 26 October 2021 | 213 × 401 (12 KB) | Chetvorno (talk | contribs) | Uploaded own work with UploadWizard |
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Width | 60.25162mm |
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Height | 113.2797mm |