{"id":2195,"date":"2013-03-01T00:00:52","date_gmt":"2013-02-28T15:00:52","guid":{"rendered":"https:\/\/micronix-jp.com\/?p=2195"},"modified":"2023-08-01T11:11:45","modified_gmt":"2023-08-01T02:11:45","slug":"ant-f-g","status":"publish","type":"post","link":"https:\/\/micronix-jp.com\/english\/note\/application\/ant-f-g.html","title":{"rendered":"Calculation of antenna factor and gain"},"content":{"rendered":"<p>The calculation equation useful for mutual conversion of an antenna factor and gain is presented.<\/p><div class=\"wp-block-vk-blocks-table-of-contents-new vk_tableOfContents vk_tableOfContents-style-default tabs\"><div class=\"tab\"><div class=\"vk_tableOfContents_title\">\u76ee\u6b21<\/div><input type=\"checkbox\" id=\"chck1\"\/><label class=\"tab-label vk_tableOfContents_openCloseBtn button_status button_status-close\" for=\"chck1\"><\/label><ul class=\"vk_tableOfContents_list tab_content-close\"><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-2\" data-reactroot=\"\"><a href=\"#vk-htags-f3bf34d4-bfbc-458e-be70-f158cc1d316c\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">1. <\/span>Application<\/a><\/li><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-2\" data-reactroot=\"\"><a href=\"#vk-htags-f1e0717d-20a8-462c-80a9-c92fa36e073f\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">2. <\/span>Solution<\/a><\/li><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-2\" data-reactroot=\"\"><a href=\"#vk-htags-7209a786-20e2-4c86-99b9-16972325bc4e\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">3. <\/span>System configuration<\/a><\/li><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-2\" data-reactroot=\"\"><a href=\"#vk-htags-1014f28a-9456-4d3a-8f8f-a0f983bb8d1c\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">4. <\/span>Products introduction<\/a><\/li><\/ul><\/div><\/div><h2 class=\"wp-block-heading\" id=\"vk-htags-f3bf34d4-bfbc-458e-be70-f158cc1d316c\">Application<\/h2><figure class=\"wp-block-image aligncenter\"><img decoding=\"async\" src=\"\/eng\/image\/application\/ANT-F-G-00.jpg\" alt=\"Figure:Connection example\"\/><figcaption class=\"wp-element-caption\">Connection block diagram<\/figcaption><\/figure><h2 class=\"vk_block-margin-lg--margin-top wp-block-heading\" id=\"vk-htags-f1e0717d-20a8-462c-80a9-c92fa36e073f\">Solution<\/h2><ul class=\"wp-block-list\"><li>When measuring the electric field strength  by com bining a spectrum analyzer with an antenna,  calcul ating an antenna gain from an antenna factor, or the contrary may be needed. The calculation equation is shown below. In MSA438 , the electric field strength can be read directly by registering the antenna gain in it.<\/li>\n\n<li>The following equation is used to calculate the ant enna factor Af (dB\/m) from the antenna gain Ga (dBi) in a 50-ohm system.<\/li><\/ul><figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"730\" height=\"129\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/08\/ANT-F-G-01.gif\" alt=\"\" class=\"wp-image-9633\"\/><\/figure><ul class=\"wp-block-list\"><li>Similarly, the following equation is used to calcula te the antenna gain Ga (dBi) from the antenna facto r Af (dB\/m) in a 50-ohm system.<\/li><\/ul><figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"730\" height=\"201\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/08\/ANT-F-G-02.gif\" alt=\"\" class=\"wp-image-9635\"\/><\/figure><ul class=\"wp-block-list\"><li>The following table is a calculation example.<\/li><\/ul><figure class=\"wp-block-flexible-table-block-table\"><table class=\"\"><tbody><tr><th>Frequency [MHz]<\/th><td style=\"text-align:center\">30<\/td><td style=\"text-align:center\">50<\/td><td style=\"text-align:center\">100<\/td><td style=\"text-align:center\">200<\/td><td style=\"text-align:center\">500<\/td><td style=\"text-align:center\">1000<\/td><td style=\"text-align:center\">1500<\/td><td style=\"text-align:center\">2000<\/td><td style=\"text-align:center\">3000<\/td><\/tr><tr><th>Antenna factor [dB\/m]<\/th><td style=\"text-align:center\">38.5<\/td><td style=\"text-align:center\">32.5<\/td><td style=\"text-align:center\">27.8<\/td><td style=\"text-align:center\">22.6<\/td><td style=\"text-align:center\">23.3<\/td><td style=\"text-align:center\">29.5<\/td><td style=\"text-align:center\">40.2<\/td><td style=\"text-align:center\">47.3<\/td><td style=\"text-align:center\">50.5<\/td><\/tr><tr><th>Antenna factor [dB\/m]<\/th><td style=\"text-align:center\">-38.7<\/td><td style=\"text-align:center\">-28.3<\/td><td style=\"text-align:center\">-17.6<\/td><td style=\"text-align:center\">-6.4<\/td><td style=\"text-align:center\">0.9<\/td><td style=\"text-align:center\">0.7<\/td><td style=\"text-align:center\">-6.4<\/td><td style=\"text-align:center\">-11.1<\/td><td style=\"text-align:center\">-10.7<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"vk_block-margin-lg--margin-top wp-block-heading\" id=\"vk-htags-7209a786-20e2-4c86-99b9-16972325bc4e\">System configuration<\/h2><figure class=\"wp-block-flexible-table-block-table\"><table class=\"\"><tbody><tr><td><a href=\"\/english\/products\/spectrum-analyzer\/msa400\/msa438.html\">Spectrum Analyzer MSA438 <\/a><\/td><td style=\"text-align:right\">\u00d71<\/td><\/tr><tr><td>MSA438 calibration set<\/td><td style=\"text-align:right\">\u00d71<\/td><\/tr><tr><td><a href=\"\/english\/products\/test-accessories\/man150.html\">Biconical Antenna\uff3bMAN150] <\/a><\/td><td style=\"text-align:right\">\u00d71<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"vk_block-margin-lg--margin-top wp-block-heading\" id=\"vk-htags-1014f28a-9456-4d3a-8f8f-a0f983bb8d1c\">Products introduction<\/h2><div class=\"wp-block-vk-blocks-select-post-list vk_posts vk_posts-postType-post vk_posts-layout-card-noborder vk_postList\"><div id=\"post-5787\" class=\"vk_post vk_post-postType-product card card-noborder vk_post-col-xs-12 vk_post-col-sm-6 vk_post-col-md-3 vk_post-col-lg-3 vk_post-col-xl-3 vk_post-col-xxl-3 post-2195 post type-post status-publish format-standard has-post-thumbnail hentry category-category-note tag-app-knowledge tag-market-other tag-application-spectrum-analyzer tag-application-test-accessories\"><div class=\"vk_post_imgOuter\" 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https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620.png 620w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/div><!-- [ \/.vk_post_imgOuter ] --><div class=\"vk_post_body card-body\"><h5 class=\"vk_post_title card-title\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/msa400\/msa438.html\">Handheld Spectrum Analyzer MSA438<\/a><\/h5><p class=\"vk_post_excerpt card-text\">The most popular model in MSA 400 series.<br \/>\r\nMeasurement frequency : 50kHz to 3.3GHz <\/p><\/div><!-- [ \/.card-body ] --><\/div><!-- [ \/.card ] -->\n\n<div id=\"post-5936\" class=\"vk_post vk_post-postType-product card card-noborder vk_post-col-xs-12 vk_post-col-sm-6 vk_post-col-md-3 vk_post-col-lg-3 vk_post-col-xl-3 vk_post-col-xxl-3 post-2195 post type-post status-publish format-standard has-post-thumbnail hentry category-category-note tag-app-knowledge tag-market-other tag-application-spectrum-analyzer tag-application-test-accessories\"><div class=\"vk_post_imgOuter\" style=\"background-image:url(https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MAN150_620x620.png)\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/test-accessories\/man150.html\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MAN150_620x620-300x300.png\" class=\"vk_post_imgOuter_img card-img-top wp-post-image\" alt=\"\" srcset=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MAN150_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MAN150_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MAN150_620x620-600x600.png 600w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MAN150_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MAN150_620x620.png 620w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/div><!-- [ \/.vk_post_imgOuter ] --><div class=\"vk_post_body card-body\"><h5 class=\"vk_post_title card-title\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/test-accessories\/man150.html\">Biconical Antenna MAN150\/MAN150B<\/a><\/h5><p class=\"vk_post_excerpt card-text\">Suitable for simplified measurement of radiated emissions.<\/p><\/div><!-- [ \/.card-body ] --><\/div><!-- [ \/.card ] --><\/div><div class=\"wp-block-vk-blocks-button vk_button vk_button-color-custom vk_button-f2098673-e53c-4912-ab34-1adf453d1283 vk_button-align-block\"><a href=\"\/eng\/file-download\/application\/pdf\/antenna_factor.pdf\" class=\"vk_button_link btn has-background btn-lg btn-block\" role=\"button\" aria-pressed=\"true\" target=\"_blank\" rel=\"noopener\"><div class=\"vk_button_link_caption\"><i class=\"fas fa-file-pdf 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repair, please do not hesitate to contact us about any small matter.<\/p>\n\n<div class=\"wp-block-vk-blocks-grid-column vk_gridColumn\"><div class=\"row\"><div class=\"wp-block-vk-blocks-grid-column-item vk_gridColumn_item col-12 col-sm-12 col-md-12 col-lg-12 col-xl-12 col-xxl-12\"><div class=\"wp-block-vk-blocks-button vk_button vk_button-color-custom vk_button-align-block is-style-shine\"><a href=\"https:\/\/micronix-jp.com\/english\/contact\/\" class=\"vk_button_link btn has-background has-luminous-vivid-orange-background-color btn-lg btn-block\" role=\"button\" aria-pressed=\"true\" target=\"_blank\" rel=\"noopener\"><div class=\"vk_button_link_caption\"><i class=\"far fa-envelope vk_button_link_before\" aria-hidden=\"true\"><\/i><span class=\"vk_button_link_txt\"><strong>Contact Form<\/strong><\/span><\/div><\/a><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>The calculation equation useful for mutual conversion of an antenna factor and gain is presented.ApplicationSolutionSystem configurationProducts introduction<\/p>\n","protected":false},"author":1,"featured_media":8178,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"vkexunit_cta_each_option":"","footnotes":""},"categories":[17],"tags":[47,67,75,76],"class_list":["post-2195","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-category-note","tag-app-knowledge","tag-market-other","tag-application-spectrum-analyzer","tag-application-test-accessories"],"_links":{"self":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2195","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=2195"}],"version-history":[{"count":9,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2195\/revisions"}],"predecessor-version":[{"id":9644,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2195\/revisions\/9644"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media\/8178"}],"wp:attachment":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media?parent=2195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/categories?post=2195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/tags?post=2195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}