{"id":16321,"date":"2026-01-12T21:49:23","date_gmt":"2026-01-12T16:19:23","guid":{"rendered":"https:\/\/johnsonfrancis.org\/techworld\/?p=16321"},"modified":"2026-01-12T21:49:25","modified_gmt":"2026-01-12T16:19:25","slug":"suppose-inverted-v-dipole-elements-are-at-right-angles-to-each-other-in-horizontal-plane-what-will-be-the-radiation-pattern","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/techworld\/suppose-inverted-v-dipole-elements-are-at-right-angles-to-each-other-in-horizontal-plane-what-will-be-the-radiation-pattern\/","title":{"rendered":"Suppose inverted V dipole elements are at right angles to each other in horizontal plane. What will be the radiation pattern?"},"content":{"rendered":"<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/Px5t2jUCaro?si=wev_o7q37PhFCcRs\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n\n<p class=\"wp-block-paragraph\">I have nearly this situation for my 80m inverted V dipole because of mounting constraints. Height of antenna feed point is about 5.5 m from ground. Ends are at about 4 m from ground. There is a 1:1 current balun at feed point, an &#8216;ugly&#8217; balun in the shack with 15 turns of RG 58 on 4 inch PVC pipe and a common mode choke wound on FT240-43 toroid with 11+ 11 turns of RG 316 coax. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the two limbs (elements) of a single inverted V antenna are arranged at right angles (90\u00b0) to each other in the horizontal plane, the antenna is effectively a <strong>bent dipole<\/strong> viewed from above. This specific geometry creates several distinct shifts in performance compared to a standard straight inverted V. These are the possibilities which I got online:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Radiation Pattern<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A standard inverted V has a &#8220;fat&#8221; figure-8 pattern, radiating most strongly broadside to the wires. By bending the limbs to 90\u00b0 horizontally:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Near-Omnidirectionality:<\/strong> The nulls (the &#8220;dead spots&#8221; off the ends of the wires) are significantly filled in. The antenna becomes much more <strong>omnidirectional<\/strong>, radiating more equally in all directions.<\/li>\n\n\n\n<li><strong>Maximum Radiation Direction:<\/strong> The peak signal will generally favor the direction the &#8220;V&#8221; is pointing (the bisector of the angle) and the area directly opposite it.<\/li>\n\n\n\n<li><strong>Mixed Polarization:<\/strong> While a straight dipole is primarily horizontally polarized, this bent configuration introduces a significant <strong>vertical component<\/strong> to the radiation, especially toward the ends of the wires. This can be an advantage for local contacts.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Impedance and Tuning<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Lower Impedance:<\/strong> Bending the limbs closer together lowers the feedpoint impedance. While a straight inverted V is often close to 50 \u03a9, a 90\u00b0 horizontal bend can drop the impedance to approximately 30 \u03a9 to 35 \u03a9, which may result in a slightly higher SWR on a standard 50 \u03a9 feedline.<\/li>\n\n\n\n<li><strong>Physical Length:<\/strong> You may need to slightly <strong>increase the length<\/strong> of the wires (by about 3\u20135%) to maintain resonance compared to a straight dipole, as the proximity of the two limbs increases mutual coupling.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Though this is the theoretical aspect, actual impedance which I noted on the NanoVNA Smith chart is near 50 \u03a9 with very little reactive component. There is much more complexity to the antenna other than the 90\u00b0 horizontal bend. Midpoint of one limb has been elevated to about 10m from the ground, again due to mounting constraints. 40m inverted V and loop antenna for 40m are nearby. One limb passes between two nearby buildings. Somehow, these complex interactions have brought the impedance near 50 \u03a9 and SWR near 1:1! Would like to know your thoughts on similar complex antenna mounting situations which are very difficult to model!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I have nearly this situation for my 80m inverted V dipole because of mounting constraints. Height of antenna feed point is about 5.5 m from ground. Ends are at about 4 m from ground. There is a 1:1 current balun at feed point, an &#8216;ugly&#8217; balun in the shack with 15 turns of RG 58 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16323,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-16321","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amateur-radio-ham-radio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Suppose inverted V dipole elements are at right angles to each other in horizontal plane. 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There is a 1:1 current balun at feed point, an &#8216;ugly&#8217; balun in the shack with 15 turns of RG 58 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/techworld\/suppose-inverted-v-dipole-elements-are-at-right-angles-to-each-other-in-horizontal-plane-what-will-be-the-radiation-pattern\/\" \/>\n<meta property=\"og:site_name\" content=\"Johnson&#039;s Techworld\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-12T16:19:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-12T16:19:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2026\/01\/Suppose-inverted-V-dipole-elements-are-at-right-angles-to-each-other-in-horizontal-plane.-What-will-be-the-radiation-pattern.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1205\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Johnson Francis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Johnson Francis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/suppose-inverted-v-dipole-elements-are-at-right-angles-to-each-other-in-horizontal-plane-what-will-be-the-radiation-pattern\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/suppose-inverted-v-dipole-elements-are-at-right-angles-to-each-other-in-horizontal-plane-what-will-be-the-radiation-pattern\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"headline\":\"Suppose inverted V dipole elements are at right angles to each other in horizontal plane. 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