{"id":5285,"date":"2014-03-15T11:45:46","date_gmt":"2014-03-15T10:45:46","guid":{"rendered":"http:\/\/www.gsm-modem.de\/M2M\/?p=5285"},"modified":"2014-03-15T11:45:46","modified_gmt":"2014-03-15T10:45:46","slug":"why-a-gsm-quad-band-antenna-on-60-mm-x-30-mm-ground-plane-will-not-radiate-well","status":"publish","type":"post","link":"http:\/\/www.gsm-modem.de\/M2M\/m2m-faq\/why-a-gsm-quad-band-antenna-on-60-mm-x-30-mm-ground-plane-will-not-radiate-well\/","title":{"rendered":"Why a GSM Quad Band antenna on 60 mm x 30 mm ground plane will not radiate well?"},"content":{"rendered":"<p><strong>Q:<\/strong> I am trying to figure out if it is possible to design a reasonable quad  band on a PCB that has a total overall size (ground plane plus antenna)  of about 60x30mm, using a GSM module. Have you ever tried something around this size?<\/p>\n<p><strong>A:<\/strong> Some chapters out of my IoT M2M book:<br \/>\n7\u00a0\u00a0 \u00a0Simulation of an embedded GSM PCB track antenna\u00a0\u00a0 \u00a026<br \/>\n7.1\u00a0\u00a0 \u00a0Definition of the antenna simulation project\u00a0\u00a0 \u00a026<br \/>\n7.2\u00a0\u00a0 \u00a0Description of the inverted F antenna\u00a0\u00a0 \u00a026<br \/>\n7.3\u00a0\u00a0 \u00a03D model of the simulation\u00a0\u00a0 \u00a027<br \/>\n7.4\u00a0\u00a0 \u00a0Optimization \u2013 determination of antenna shape\u00a0\u00a0 \u00a028<br \/>\n7.5\u00a0\u00a0 \u00a0Typical requirements of a quad band GSM antenna\u00a0\u00a0 \u00a028<br \/>\n7.6\u00a0\u00a0 \u00a0Optimization of the quad band antenna GSM antenna shape\u00a0\u00a0 \u00a031<br \/>\n7.7\u00a0\u00a0 \u00a0Directional characteristics of the antenna for two GSM frequencies\u00a0\u00a0 \u00a031<br \/>\n7.8\u00a0\u00a0 \u00a0Influence on the antenna characteristics of the housing\u00a0\u00a0 \u00a034<br \/>\n7.9\u00a0\u00a0 \u00a0Influence of the ground plane on the antenna characteristics\u00a0\u00a0 \u00a035<\/p>\n<p>Chapter 7.9 shows you in detail what will happen on a too small ground plane. 60 mm x 30 mm is very small. Just have a look on some SMT mounted cellular antennas und you will see, that they are all on 45 mm +\/-5 mm x 100 mm +\/- 10 mm ground plane. The simulation in the book shows that the antenna efficiency will drop dramatically on 45 mm x 45 mm at the lower GSM band 850\/900 and for the higher GSM band 1800\/1900 it is still fine. This is logical, because the wavelength at GSM 1800\/1900 is estimated the half of GSM 850\/900.<\/p>\n<p>If you still not sure which antenna to select and why, then do not hesitate to drop an email to harald.naumann (at) gsm-modem.de<\/p>\n<div class=\"shariff shariff-align-left shariff-widget-align-left\"><ul class=\"shariff-buttons theme-default orientation-horizontal buttonsize-small\"><li class=\"shariff-button twitter shariff-nocustomcolor\" style=\"background-color:#595959\"><a href=\"https:\/\/twitter.com\/share?url=http%3A%2F%2Fwww.gsm-modem.de%2FM2M%2Fm2m-faq%2Fwhy-a-gsm-quad-band-antenna-on-60-mm-x-30-mm-ground-plane-will-not-radiate-well%2F&text=Why%20a%20GSM%20Quad%20Band%20antenna%20on%2060%20mm%20x%2030%20mm%20ground%20plane%20will%20not%20radiate%20well%3F\" title=\"Share on X\" aria-label=\"Share on X\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#000; color:#fff\" target=\"_blank\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\"><path fill=\"#000\" d=\"M14.258 10.152L23.176 0h-2.113l-7.747 8.813L7.133 0H0l9.352 13.328L0 23.973h2.113l8.176-9.309 6.531 9.309h7.133zm-2.895 3.293l-.949-1.328L2.875 1.56h3.246l6.086 8.523.945 1.328 7.91 11.078h-3.246zm0 0\"\/><\/svg><\/span><span class=\"shariff-text\">share<\/span>&nbsp;<\/a><\/li><li class=\"shariff-button facebook shariff-nocustomcolor\" style=\"background-color:#4273c8\"><a href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=http%3A%2F%2Fwww.gsm-modem.de%2FM2M%2Fm2m-faq%2Fwhy-a-gsm-quad-band-antenna-on-60-mm-x-30-mm-ground-plane-will-not-radiate-well%2F\" title=\"Share on Facebook\" aria-label=\"Share on Facebook\" role=\"button\" rel=\"nofollow\" class=\"shariff-link\" style=\"; 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Have you ever tried something around this size? A: Some chapters out of my IoT M2M book: 7\u00a0\u00a0 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[3],"tags":[15,51],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Why a GSM Quad Band antenna on 60 mm x 30 mm ground plane will not radiate well?\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Harald Naumann\"\/>\n\t<meta name=\"keywords\" content=\"antenna,cellular,m2m faq, hints, tips\" \/>\n\t<link rel=\"canonical\" href=\"http:\/\/www.gsm-modem.de\/M2M\/m2m-faq\/why-a-gsm-quad-band-antenna-on-60-mm-x-30-mm-ground-plane-will-not-radiate-well\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" 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