1.0Johnson's Techworldhttps://johnsonfrancis.org/techworldJohnson Francishttps://johnsonfrancis.org/techworld/author/jf/rich600338<blockquote class="wp-embedded-content" data-secret="mIwJGofZ02"><a href="https://johnsonfrancis.org/techworld/swiss-quad-antenna/">Swiss Quad Antenna</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://johnsonfrancis.org/techworld/swiss-quad-antenna/embed/#?secret=mIwJGofZ02" width="600" height="338" title="“Swiss Quad Antenna” — Johnson's Techworld" data-secret="mIwJGofZ02" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://johnsonfrancis.org/techworld/wp-includes/js/wp-embed.min.js </script> https://johnsonfrancis.org/techworld/wp-content/uploads/2026/08/Swiss-Quad-Antenna-1.jpg1346756The Swiss Quad is a highly efficient directional loop antenna, developed in 1960 by Swiss amateur radio operator HB9CV. It is a unique variation of the traditional cubical quad that solves some of the mechanical fragility of the original design while also altering its electrical properties to improve performance. How It Differs from a Standard […]