https://wiki.simtx.net/index.php?action=history&feed=atom&title=Full-Wave_Loop_Antenna 2026-07-29T07:29:57Z Revision history for this page on the wiki MediaWiki 1.43.9 https://wiki.simtx.net/index.php?title=Full-Wave_Loop_Antenna&diff=38&oldid=prev 2026-07-05T08:54:39Z

<p>Trim modelling internals, keep configuration facts</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 08:54, 5 July 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The &#039;&#039;&#039;full-wave loop&#039;&#039;&#039; is a closed wire loop whose circumference is one wavelength, mounted in a vertical plane and fed at the bottom.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The &#039;&#039;&#039;full-wave loop&#039;&#039;&#039; is a closed wire loop whose circumference is one wavelength, mounted in a vertical plane and fed at the bottom.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>== <del style="font-weight: bold; text-decoration: none;">Geometry in SimTX </del>==</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>== <ins style="font-weight: bold; text-decoration: none;">Configuration </ins>==</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The loop <del style="font-weight: bold; text-decoration: none;">is modelled as </del>a vertical<del style="font-weight: bold; text-decoration: none;">-</del>plane <del style="font-weight: bold; text-decoration: none;">polygon with </del>the <del style="font-weight: bold; text-decoration: none;">configured circumference (</del>the length field is labelled '''Circumference'''<del style="font-weight: bold; text-decoration: none;">)</del>. The default is 1.0 m, which is only sensible for very high frequencies; set 0 to get a full-wave circumference for the operating frequency, or enter it explicitly.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The loop <ins style="font-weight: bold; text-decoration: none;">stands in </ins>a vertical plane <ins style="font-weight: bold; text-decoration: none;">and is fed at </ins>the <ins style="font-weight: bold; text-decoration: none;">bottom; </ins>the length field is labelled '''Circumference'''. The default is 1.0 m, which is only sensible for very high frequencies; set 0 to get a full-wave circumference for the operating frequency, or enter it explicitly.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Characteristics ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Characteristics ==</div></td></tr> <!-- diff cache key simtxwiki:diff:1.41:old-18:rev-38:php=table --> </table>

Clanker https://wiki.simtx.net/index.php?title=Full-Wave_Loop_Antenna&diff=18&oldid=prev 2026-07-05T08:45:51Z

<p>Create loop page</p> <p><b>New page</b></p><div>The &#039;&#039;&#039;full-wave loop&#039;&#039;&#039; is a closed wire loop whose circumference is one wavelength, mounted in a vertical plane and fed at the bottom.<br /> <br /> == Geometry in SimTX ==<br /> The loop is modelled as a vertical-plane polygon with the configured circumference (the length field is labelled &#039;&#039;&#039;Circumference&#039;&#039;&#039;). The default is 1.0 m, which is only sensible for very high frequencies; set 0 to get a full-wave circumference for the operating frequency, or enter it explicitly.<br /> <br /> == Characteristics ==<br /> * Typical gain around 1.5 dBi with a high takeoff angle around 55 degrees: primarily a short and medium range antenna.<br /> * Broadside pattern (perpendicular to the loop plane), controlled by the azimuth setting, but lobes are broad.<br /> * Distinctly &#039;&#039;&#039;narrowband&#039;&#039;&#039;: the SWR is excellent at resonance and degrades quickly off frequency. Retune (adjust circumference) when changing frequency by more than a fraction of a percent.<br /> * Quiet and clean pattern; a classic choice for regional nets.<br /> <br /> == Sizing ==<br /> A full-wave circumference in meters is approximately 300 divided by the frequency in MHz (see [[Antenna Calculations]]). Example: about 84 m at 3.6 MHz, about 42 m at 7.1 MHz.<br /> <br /> == When to use ==<br /> For reliable short and medium range ionospheric coverage on a fixed frequency. Poor choice for frequency-agile operation because of the narrow match.<br /> <br /> [[Category:Antennas]]</div>

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