{"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-flex-start shariff-widget-align-flex-start\"><ul class=\"shariff-buttons theme-default orientation-horizontal buttonsize-small\"><li class=\"shariff-button twitter shariff-nocustomcolor\" style=\"background-color:#32bbf5\"><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 Twitter\" aria-label=\"Share on Twitter\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#55acee; color:#fff\" target=\"_blank\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 30 32\"><path fill=\"#55acee\" d=\"M29.7 6.8q-1.2 1.8-3 3.1 0 0.3 0 0.8 0 2.5-0.7 4.9t-2.2 4.7-3.5 4-4.9 2.8-6.1 1q-5.1 0-9.3-2.7 0.6 0.1 1.5 0.1 4.3 0 7.6-2.6-2-0.1-3.5-1.2t-2.2-3q0.6 0.1 1.1 0.1 0.8 0 1.6-0.2-2.1-0.4-3.5-2.1t-1.4-3.9v-0.1q1.3 0.7 2.8 0.8-1.2-0.8-2-2.2t-0.7-2.9q0-1.7 0.8-3.1 2.3 2.8 5.5 4.5t7 1.9q-0.2-0.7-0.2-1.4 0-2.5 1.8-4.3t4.3-1.8q2.7 0 4.5 1.9 2.1-0.4 3.9-1.5-0.7 2.2-2.7 3.4 1.8-0.2 3.5-0.9z\"\/><\/svg><\/span><span class=\"shariff-text\">tweet<\/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":[],"_links":{"self":[{"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/posts\/5285"}],"collection":[{"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/comments?post=5285"}],"version-history":[{"count":4,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/posts\/5285\/revisions"}],"predecessor-version":[{"id":5289,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/posts\/5285\/revisions\/5289"}],"wp:attachment":[{"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/media?parent=5285"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/categories?post=5285"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/tags?post=5285"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}