{"id":2184,"date":"2009-11-01T00:00:52","date_gmt":"2009-10-31T15:00:52","guid":{"rendered":"https:\/\/micronix-jp.com\/?p=2184"},"modified":"2023-08-01T09:39:02","modified_gmt":"2023-08-01T00:39:02","slug":"vswr_bridge","status":"publish","type":"post","link":"https:\/\/micronix-jp.com\/english\/note\/application\/vswr_bridge.html","title":{"rendered":"Application of VSWR bridge"},"content":{"rendered":"<p class=\"has-large-font-size\"><strong>Simplified measurement method of impedance <\/strong><\/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-cb9b2e96-5c7c-4eb4-9245-be0bf48fd9ec\" 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-1006e7d3-e698-4db4-9a7b-9f4607a37ec7\" 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-3\" data-reactroot=\"\"><a href=\"#vk-htags-530dc035-ab54-4d16-82b8-868953aa2179\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">2.1. <\/span>Principle of the measurement<\/a><\/li><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-3\" data-reactroot=\"\"><a href=\"#vk-htags-85876b6f-cc6b-4f27-a2fb-2706297be155\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">2.2. <\/span>Principle of the measurement<\/a><\/li><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-2\" data-reactroot=\"\"><a href=\"#vk-htags-d9a9df13-b241-4fb6-b38a-a03200082241\" 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-1ebdfe68-17fb-45b0-88c2-805a52c71bfd\" 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-cb9b2e96-5c7c-4eb4-9245-be0bf48fd9ec\">Application<\/h2><p>The impedance of inputs and outputs of RF circuits are demanded to be 50 ohm. It is possible to verify the impedance using an impedance analyzer or other \n  method. But these methods need so much cost. <\/p><p>MVS300 provides an easy and a low cost way to verify it.<\/p><h2 class=\"vk_block-margin-lg--margin-top wp-block-heading\" id=\"vk-htags-1006e7d3-e698-4db4-9a7b-9f4607a37ec7\">Solution<\/h2><h3 class=\"wp-block-heading\" id=\"vk-htags-530dc035-ab54-4d16-82b8-868953aa2179\">Principle of the measurement<\/h3><p>Using VSWR bridge, we can measure a return loss t hat is a reflected power from a DUT. In a circuit system whose the impedance is 50 ohm and the matching is enough taken, the reflection is hardly generated and the return loss becomes larger. <br>\nOn the other hand, in the case of that the DUT por t is a short circuit, the power is reflected almost  all and the return loss becomes near 0dB. <br>\nIf the return loss is under -14dB, the transmit ra te is assumed over 95%, and the impedance is generally assumed to be 50 ohm and a matching is given.<\/p><h3 class=\"vk_block-margin-md--margin-top wp-block-heading\" id=\"vk-htags-85876b6f-cc6b-4f27-a2fb-2706297be155\">Principle of the measurement<\/h3><ol class=\"wp-block-list\"><li>Connect the MSA338TG\/MSA438TG and MVS300B, and tak e a normalize in the frequency range to be measured. Keep the DUT terminal open.<\/li>\n\n<li>Connect the DUT and measure the return loss.<\/li><\/ol><p>*Please refer the manual of MVS300B for more detail <\/p><figure class=\"wp-block-image aligncenter\"><img decoding=\"async\" src=\"\/eng\/image\/application\/VSWR_bridge-00.jpg\" alt=\"Photo:Connection of the measurement system\"\/><figcaption class=\"wp-element-caption\">Connection of the measurement systemm<\/figcaption><\/figure><h2 class=\"vk_block-margin-lg--margin-top wp-block-heading\" id=\"vk-htags-d9a9df13-b241-4fb6-b38a-a03200082241\">System configuration<\/h2><ul class=\"wp-block-list\"><li><a href=\"\/english\/products\/spectrum-analyzer\/msa400\/msa438tg.html\">Spectrum Analyzer MSA438TG <\/a><\/li>\n\n<li><a href=\"\/english\/products\/spectrum-analyzer\/msa300\/msa338tg.html\">Spectrum Analyzer MSA338TG <\/a><\/li>\n\n<li><a href=\"\/english\/products\/test-accessories\/mvs300b.html\">VSWR Bridge MVS300 <\/a><\/li><\/ul><p><br>\n*MICRONIX Corporation reserves the right to make changes in design, specification and other information without prior notice.<\/p><h2 class=\"vk_block-margin-md--margin-top wp-block-heading\" id=\"vk-htags-1ebdfe68-17fb-45b0-88c2-805a52c71bfd\">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-5789\" 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-2184 post type-post status-publish format-standard has-post-thumbnail hentry category-category-note 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\/msa438tg_620x620.png)\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/msa400\/msa438tg.html\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa438tg_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\/msa438tg_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa438tg_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa438tg_620x620-600x600.png 600w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa438tg_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa438tg_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\/msa438tg.html\">[Discontinued Products] Handheld Spectrum Analyzer MSA438TG<\/a><\/h5><p class=\"vk_post_excerpt card-text\">Built-in TG from 5MHz to 3.3GHz.<br \/>\r\nMeasurement frequency : 50kHz to 3.3GHz <\/p><\/div><!-- [ \/.card-body ] --><\/div><!-- [ \/.card ] -->\n\n<div id=\"post-5793\" 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-2184 post type-post status-publish format-standard has-post-thumbnail hentry category-category-note 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\/msa300_620x620.png)\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/msa300\/msa338tg.html\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa300_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\/msa300_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa300_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa300_620x620-600x600.png 600w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa300_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa300_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\/msa300\/msa338tg.html\">[Discontinued Product]Handheld Spectrum Analyzer MSA338TG<\/a><\/h5><p class=\"vk_post_excerpt card-text\">Measurement Frequency : 50kHz to 3.3GHz<br \/>\r\nBuilt-in TG from 5MHz to 3.3GHz<\/p><\/div><!-- [ \/.card-body ] --><\/div><!-- [ \/.card ] -->\n\n<div id=\"post-5799\" 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-2184 post type-post status-publish format-standard has-post-thumbnail hentry category-category-note 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\/MVS300B_620x620.png)\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/test-accessories\/mvs300b.html\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MVS300B_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\/MVS300B_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MVS300B_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MVS300B_620x620-600x600.png 600w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MVS300B_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MVS300B_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\/mvs300b.html\">[Discontinued Product]VSWR Bridge MVS300B<\/a><\/h5><p class=\"vk_post_excerpt card-text\">Return loss of electronic parts or circuit can be measured.<\/p><\/div><!-- [ \/.card-body ] --><\/div><!-- [ \/.card ] --><\/div><p><\/p><div class=\"wp-block-vk-blocks-button vk_button vk_button-color-custom vk_button-ac2860e5-23e9-46bc-a911-6f5bc46bdc52 vk_button-align-block\"><a href=\"\/eng\/file-download\/application\/pdf\/VSWR_bridge.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 vk_button_link_before\" aria-hidden=\"true\"><\/i><span class=\"vk_button_link_txt\">Download This Application Note (PDF)<\/span><\/div><\/a><\/div><style type=\"text\/css\">.vk_button-ac2860e5-23e9-46bc-a911-6f5bc46bdc52 .has-background {\n\t\t\t\tbackground-color: #5b6069;\n\t\t\t\tborder: 1px solid #5b6069;\n\t\t\t} <\/style><div class=\"wp-block-cover is-light vk_block-margin-xl--margin-top\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-white-background-color has-background-dim\"><\/span><img class=\"wp-block-cover__image-background wp-image-8105\" alt=\"\" src=\"https:\/\/micronix-jp.com\/wp-content\/uploads\/2022\/11\/contact_cta_cover.png\" data-object-fit=\"cover\"\/><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\"><p class=\"has-text-align-center has-huge-font-size\"><strong>Please feel free to contact us.<\/strong><\/p>\n\n<p>If you want to verify 5G, customize a radio wave shield box, or need product 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>Simplified measurement method of impedance ApplicationThe impedance of inputs and outputs of RF circuits are demanded to be 50 ohm. It is possible to verify the impedance using an impedance [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8174,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"vkexunit_cta_each_option":"","footnotes":""},"categories":[17],"tags":[75,76],"class_list":["post-2184","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-category-note","tag-application-spectrum-analyzer","tag-application-test-accessories"],"_links":{"self":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2184","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=2184"}],"version-history":[{"count":7,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2184\/revisions"}],"predecessor-version":[{"id":9595,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2184\/revisions\/9595"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media\/8174"}],"wp:attachment":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media?parent=2184"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/categories?post=2184"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/tags?post=2184"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}