{"id":1028,"date":"2013-03-11T11:31:39","date_gmt":"2013-03-11T11:31:39","guid":{"rendered":"https:\/\/ibex.tech\/resources\/?p=1028"},"modified":"2022-02-18T15:05:17","modified_gmt":"2022-02-18T15:05:17","slug":"fm-radio-modules","status":"publish","type":"post","link":"https:\/\/ibex.tech\/resources\/geek-area\/rf\/unlicensed-bands\/fm-radio-modules","title":{"rendered":"FM Radio Modules"},"content":{"rendered":"<p>\n&nbsp;\n<\/p>\n<h4>\nThe Unlicensed&nbsp;Bands<br \/>\n<\/h4>\n<p>\n433MHz<br \/>\n868MHz<br \/>\n915MHz\n<\/p>\n<h4>\nAntenna<br \/>\n<\/h4>\n<h5>\nWire antenna<br \/>\n<\/h5>\n<p>\nA very good antenna to use for maximum range. &nbsp;Use a length of wire (or a PCB track) 1\/4 wave length (e.g. 172mm&nbsp;for 433MHz).&nbsp; The optimum is to use the wire straight, but it can also be bent into a &#39;L &#39;or &#39;U&#39; shape if necessary (it will reduce the range a bit but it still works well).\n<\/p>\n<p>\nA wire antenna is better than PCB loop\n<\/p>\n<h5>\nHelical (Coil) \/ Spring antenna<br \/>\n<\/h5>\n<p>\nAlso commonly used.\n<\/p>\n<h5>\nPCB loop<br \/>\n<\/h5>\n<p>\nGood for ease \/ low cost of manufacture, but range is reduced.\n<\/p>\n<p>\n&nbsp;\n<\/p>\n<p>\n&nbsp;\n<\/p>\n<p>\n&nbsp;\n<\/p>\n<p>\n&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; The Unlicensed&nbsp;Bands 433MHz 868MHz 915MHz Antenna Wire antenna A very good antenna to use for maximum range. &nbsp;Use a length of wire (or a PCB track) 1\/4 wave length (e.g. 172mm&nbsp;for 433MHz).&nbsp; The optimum is to use the wire straight, but it can also be bent into a &#39;L &#39;or &#39;U&#39; shape if necessary [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[63],"tags":[],"class_list":["post-1028","post","type-post","status-publish","format-standard","hentry","category-unlicensed-bands"],"_links":{"self":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/1028","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/comments?post=1028"}],"version-history":[{"count":4,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/1028\/revisions"}],"predecessor-version":[{"id":1569,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/posts\/1028\/revisions\/1569"}],"wp:attachment":[{"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/media?parent=1028"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/categories?post=1028"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibex.tech\/resources\/wp-json\/wp\/v2\/tags?post=1028"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}