{"id":2251,"date":"2012-09-01T00:00:54","date_gmt":"2012-08-31T15:00:54","guid":{"rendered":"https:\/\/micronix-jp.com\/?p=2251"},"modified":"2023-03-20T17:24:36","modified_gmt":"2023-03-20T08:24:36","slug":"roopant-fa","status":"publish","type":"post","link":"https:\/\/micronix-jp.com\/english\/note\/application\/roopant-fa.html","title":{"rendered":"Electric field strength measurement using antenna factor of loop antenna"},"content":{"rendered":"<p class=\"bigTitle\" style=\"margin-bottom: 1em\">A handheld spectrum analyzer and a loop antenna enable the easy measurement of the electric field strength from 50kHz to 30MHz.<\/p>\n\n\n<h2>Application<\/h2>\n<p>[Connection block diagram]<\/p>\n<img loading=\"lazy\" decoding=\"async\" src=\"\/eng\/image\/application\/ROOPANT-FA-00.jpg\" alt=\"Figure:Spectrum AnalyzerMSA438\u3068Loop antenna\u3092\u63a5\u7d9a\u3059\u308b\" width=\"730\" height=\"346\"> \n\n\n<h2>Solution<\/h2>\n<p>By using the antenna factor of loop antenna MAN120, the electric field strength from 50kHz to 30MHz can be measured with handheld spectrum analyzer MSA438.<\/p>\n<p>The electric field strength is calculated from the following equation.<\/p>\n<p>Er = Pr +Af + 107<\/p>\n<p>However, Er:electric field strength [dBuV\/m],  Pr: receiving power [dBm],  Af: antenna factor [dB\/m]<\/p>\n<p>The typical value of the antenna factor of loop antenna MAN120 is as follows. This antenna has received the A2LA accreditation calibration.<\/p>\n<style>\n\nul.flexBoxDivide li{\n  margin-bottom: 2em;\n}\n\n@media print, screen and (min-width:860px) {\n  ul.flexBoxDivide li{\n    width: calc(100% \/ 3 - .4em);\n  }\n}\n\ntable.SimpleCenter th{\ntext-align: center;\n}\n\n<\/style>\n<ul class=\"flexBox flexBoxDivide\">\n<li>\n<table class=\"SimpleCenter\">\n<tbody><tr>\n<th>Frequency [MHz]<\/th>\n<th>Af [dB\/m]<\/th>\n<\/tr>\n<tr>\n<td>0.05<\/td>\n<td>70.8<\/td>\n<\/tr>\n<tr>\n<td>0.07<\/td>\n<td>67.9<\/td>\n<\/tr>\n<tr>\n<td>0.1<\/td>\n<td>65<\/td>\n<\/tr>\n<tr>\n<td>0.15<\/td>\n<td>61.6<\/td>\n<\/tr>\n<tr>\n<td>0.2<\/td>\n<td>59.2<\/td>\n<\/tr>\n<tr>\n<td>0.3<\/td>\n<td>56<\/td>\n<\/tr>\n<tr>\n<td>0.4<\/td>\n<td>53.9<\/td>\n<\/tr>\n<tr>\n<td>0.5<\/td>\n<td>52.6<\/td>\n<\/tr>\n<\/tbody><\/table>\n<\/li>\n<li>\n<table class=\"SimpleCenter\">\n<tbody><tr>\n<th>Frequency [MHz]<\/th>\n<th>Af [dB\/m]<\/th>\n<\/tr>\n<tr>\n<td>0.6<\/td>\n<td>51.4<\/td>\n<\/tr>\n<tr>\n<td>0.7<\/td>\n<td>50.7<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>49.2<\/td>\n<\/tr>\n<tr>\n<td>1.5<\/td>\n<td>48.2<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>47.5<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>47.3<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>47.1<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>47.1<\/td>\n<\/tr>\n<\/tbody><\/table>\n<\/li>\n<li>\n<table class=\"SimpleCenter\">\n<tbody><tr>\n<th>Frequency [MHz]<\/th>\n<th>Af [dB\/m]<\/th>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>47.2<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>47.4<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>48.1<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td>47.4<\/td>\n<\/tr>\n<tr>\n<td>15<\/td>\n<td>47.3<\/td>\n<\/tr>\n<tr>\n<td>20<\/td>\n<td>47.5<\/td>\n<\/tr>\n<tr>\n<td>25<\/td>\n<td>46.9<\/td>\n<\/tr>\n<tr>\n<td>30<\/td>\n<td>47.1<\/td>\n<\/tr>\n<\/tbody><\/table>\n<\/li>\n<\/ul>\n\n\n\n<h2>System configuration<\/h2>\n<p>This system is an inexpensive tool by which the elctric field strength can be easily measured.<\/p>\n<table>\n<tbody>\n<tr>\n<td><a href=\"\/english\/products\/spectrum-analyzer\/msa400\/msa438.html\">3.3GHzSpectrum Analyzer [MSA438]<\/a><\/td>\n<td nowrap=\"\" class=\"textRight\"> x 1 <\/td>\n<\/tr>\n<tr>\n<td>MSA438 calibration set<\/td>\n<td nowrap=\"\" class=\"textRight\"> x 1 <\/td>\n<\/tr>\n<tr>\n<td><a href=\"\/english\/products\/test-accessories\/man120.html\">Loop antenna [MAN120)]<\/a><\/td>\n<td nowrap=\"\" class=\"textRight\"> x 1 <\/td>\n<\/tr>\n<tr>\n<td><a href=\"\/english\/products\/test-accessories\/coaxialcable.html\">BNC cable (1.5m)  [MC314]<\/a><\/td>\n<td nowrap=\"\" class=\"textRight\"> x 1 <\/td>\n<\/tr>\n<tr>\n<td>Adapter N(P)\/BNC(J)   [MA307]<\/td>\n<td nowrap=\"\" class=\"textRight\"> x 1 <\/td>\n<\/tr>\n<tr>\n<td>Adapter N(J)\/BNC(J)<\/td>\n<td nowrap=\"\" class=\"textRight\"> x 1 <\/td>\n<\/tr>\n<\/tbody>\n<tfoot>\n<\/tfoot>\n<\/table>\n\n\n\n<h2>Products introduction<\/h2>\n<div class=\"woocommerce columns-3 \"><ul class=\"products columns-3\">\n<li class=\"product type-product post-5801 status-publish first instock product_cat-shop-category-handheld-spectrum-analyzer product_cat-shop-category-spectrum-analyzer-option product_cat-shop-category-test-accessories product_tag-tag-antenna product_tag-tag-handheld-spectrum-analyzer product_tag-tag-handheld-spectrum-analyzer-option product_tag-tag-test-accessories has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/micronix-jp.com\/english\/products\/test-accessories\/man120.html\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/man120_620x620-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\" srcset=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/man120_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/man120_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/man120_620x620-600x600.png 600w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/man120_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/man120_620x620.png 620w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><h2 class=\"woocommerce-loop-product__title\">Loop Antenna MAN120<\/h2>\n<\/a><\/li>\n<li class=\"product type-product post-5833 status-publish instock product_cat-shop-category-handheld-spectrum-analyzer product_cat-shop-category-spectrum-analyzer-option product_cat-shop-category-test-accessories product_tag-tag-coaxial-parts product_tag-tag-handheld-spectrum-analyzer-option product_tag-tag-test-accessories has-post-thumbnail shipping-taxable product-type-variable\">\n\t<a href=\"https:\/\/micronix-jp.com\/english\/products\/test-accessories\/coaxialcable.html\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/CoaxialCable_620x620-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\" srcset=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/CoaxialCable_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/CoaxialCable_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/CoaxialCable_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/CoaxialCable_620x620.png 620w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><h2 class=\"woocommerce-loop-product__title\">Coaxial Cable<\/h2>\n<\/a><\/li>\n<li class=\"product type-product post-5787 status-publish last instock product_cat-shop-category-handheld-spectrum-analyzer product_cat-shop-category-msa400 product_tag-tag-handheld-spectrum-analyzer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/msa400\/msa438.html\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\" srcset=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-600x600.png 600w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620.png 620w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><h2 class=\"woocommerce-loop-product__title\">Handheld Spectrum Analyzer MSA438<\/h2>\n<\/a><\/li>\n<\/ul>\n<\/div><div class=\"wp-block-vk-blocks-button vk_button vk_button-color-custom vk_button-align-block\"><a href=\"\/eng\/file-download\/application\/pdf\/loop_antenna_factor.pdf\" style=\"background-color:#5b6069;border:1px solid #5b6069;color:#fff;\" class=\"vk_button_link btn btn-md btn-block white\" role=\"button\" aria-pressed=\"true\" target=\"_blank\"  rel=\"noopener\"><i class=\"fas vk_button_link_before fa-file-pdf\"><\/i><span class=\"vk_button_link_txt\">Download This Application Note (PDF) 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Application [Connection block diagram] Solution By using the antenna [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8194,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"vkexunit_cta_each_option":"","footnotes":""},"categories":[17],"tags":[44,47,66,75,76],"class_list":["post-2251","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-category-note","tag-app-emc","tag-app-knowledge","tag-market-emc","tag-application-spectrum-analyzer","tag-application-test-accessories"],"_links":{"self":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2251","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/comments?post=2251"}],"version-history":[{"count":1,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2251\/revisions"}],"predecessor-version":[{"id":7065,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2251\/revisions\/7065"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media\/8194"}],"wp:attachment":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media?parent=2251"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/categories?post=2251"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/tags?post=2251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}