{"id":463194,"date":"2026-09-01T14:58:34","date_gmt":"2026-09-01T14:58:34","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/suggestions-for-simulating-electrically-small-antennas\/"},"modified":"2026-09-01T14:58:34","modified_gmt":"2026-09-01T14:58:34","slug":"suggestions-for-simulating-electrically-small-antennas","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/suggestions-for-simulating-electrically-small-antennas\/","title":{"rendered":"Suggestions for simulating electrically small antennas"},"content":{"rendered":"<p>I&#8217;m working on simulating electrically small dipoles for radio astronomy. An interesting challenge I&#8217;ve run into is that using the FEM solver the mesh and the calculation time tends to be very large. For example, I&#8217;m driving a 800mm dipole at frequencies from 20-200MHz. To meet the 1\/4 wavelenght spacing for the radiation boundary i end up with a solution space on the order of 48m3 if i were to use a spherical volume. Would using the FE-BI solver make more sense?<\/p>\n","protected":false},"template":"","class_list":["post-463194","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I&#039;m working on simulating electrically small dipoles for radio astronomy. An interesting challenge I&#039;ve run into is that using the FEM solver the mesh and the calculation time tends to be very large. For example, I&#039;m driving a 800mm dipole at frequencies from 20-200MHz. To meet the 1\/4 wavelenght spacing for the radiation boundary i\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/suggestions-for-simulating-electrically-small-antennas\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Suggestions for simulating electrically small antennas | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I&#039;m working on simulating electrically small dipoles for radio astronomy. An interesting challenge I&#039;ve run into is that using the FEM solver the mesh and the calculation time tends to be very large. For example, I&#039;m driving a 800mm dipole at frequencies from 20-200MHz. To meet the 1\/4 wavelenght spacing for the radiation boundary i\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/suggestions-for-simulating-electrically-small-antennas\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-09-01T14:58:34+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-09-01T14:58:34+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Suggestions for simulating electrically small antennas | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"I&#039;m working on simulating electrically small dipoles for radio astronomy. An interesting challenge I&#039;ve run into is that using the FEM solver the mesh and the calculation time tends to be very large. For example, I&#039;m driving a 800mm dipole at frequencies from 20-200MHz. To meet the 1\/4 wavelenght spacing for the radiation boundary i\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/suggestions-for-simulating-electrically-small-antennas\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/suggestions-for-simulating-electrically-small-antennas\\\/#listItem\",\"name\":\"Suggestions for simulating electrically small antennas\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/suggestions-for-simulating-electrically-small-antennas\\\/#listItem\",\"position\":3,\"name\":\"Suggestions for simulating electrically small antennas\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/suggestions-for-simulating-electrically-small-antennas\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/suggestions-for-simulating-electrically-small-antennas\\\/\",\"name\":\"Suggestions for simulating electrically small antennas | Ansys Learning Forum\",\"description\":\"I'm working on simulating electrically small dipoles for radio astronomy. 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