{"id":2160,"date":"2015-02-01T00:00:52","date_gmt":"2015-01-31T15:00:52","guid":{"rendered":"https:\/\/micronix-jp.com\/?p=2160"},"modified":"2023-03-25T10:55:13","modified_gmt":"2023-03-25T01:55:13","slug":"emi_chamber","status":"publish","type":"post","link":"https:\/\/micronix-jp.com\/english\/note\/application\/emi_chamber.html","title":{"rendered":"Various usages of anechoic box for EMI design of electronics"},"content":{"rendered":"<p class=\"bigTitle\" style=\"margin-bottom: 1em\">Anechoic box can help EMI design of electronics over the development period.<\/p>\n\n\n<h2>Application<\/h2>\n<p>Various usages of anechoic box to design EMI characteristics of electronics are introduced.<\/p>\n\n\n\n<h2>Solution<\/h2>\n<p> Features of typical tools for EMI  design, and solutions with anechoic box are presented in the table. <\/p>\n<style>\ntable.type01Special th{\n  text-align:center;\n  width: 25%;\n}\ntable.type01Special td{\n  width: 25%;\n}\n\n\/*\u30b9\u30de\u30db*\/\n@media screen and (width:480px) {\n  table.type01Special th{\n    white-space: normal;\n  }\n  \n}\n<\/style>\n<div class=\"pcHide tabletHide Scroll\">Scroll<\/div>\n<div class=\"table-scroll\">\n<table class=\"type01 type01Special\">\n<tbody><tr>\n<th>Typical tool for EMI design<\/th>\n<th>Advantage<\/th>\n<th>Disadvantage<\/th>\n<th>Solution using anechoic box for left disadvantage<\/th>\n<\/tr>\n<tr>\n<td>EMI rule checker<\/td>\n<td><ul>\n<li>front-loading design without being aware of EMI<\/li>\n<li>Low need to have much EMI skill <\/li>\n<\/ul><\/td>\n<td><ul>\n<li>EMI design in case of not possible to follow the rule is difficult. <\/li>\n<\/ul><\/td>\n<td> EMI characteristics of TEG that does not meet the rule can be measured with low cost.<\/td>\n<\/tr>\n<tr>\n<td>Near field scanner<\/td>\n<td><ul>\n<li>Mapping of EMI noise easily<\/li>\n<li>Validation of electric behavior by comparing with electromagnetic simulation<\/li>\n<\/ul><\/td>\n<td><ul>\n<li>Decent EMI skill is needed to analyze correlation between far field and near field properly.<\/li>\n<li>Measured near field does not necessarily match with far field.<\/li>\n<\/ul><\/td>\n<td>Correlation between far field and near field can be measured readily.<\/td>\n<\/tr>\n<tr>\n<td>Electromagnetic field simulator<\/td>\n<td><ul>\n<li>EMI estimation before trial<\/li>\n<li>Estimmation of electromagnetic which is hard to measure(ex. inner PCB pattern)<\/li>\n<li>Parametric analysis of geometry or material constant.<\/li>\n<\/ul><\/td>\n<td><ul>\n<li>Modeling often takes much time and effort.<\/li>\n<li>Analyzing time can be very long depending on model.<\/li>\n<li>Highly specialized skill is needed to make deformation model for scale reduction.<\/li>\n<\/ul><\/td>\n<td>In recent year, there is a trend which aims to build design environment for zero trial, but it is not easy. First of all, it is considered necessary to stack a number of result comparison of the simulation and measured in the far field of primitive elements. Anechoic box with low cost is very useful.<\/td>\n<\/tr>\n<tr>\n<td>Anechoic chamber<\/td>\n<td>\n<ul>\n<li>EMI design validation with hight accuracy.<\/li>\n<li>Possible to carry out compliance EMI test, if certified.<\/li>\n<\/ul><\/td>\n<td>\n<ul>\n<li>Hight cost (construction\/usage fee)<\/li>\n<li>Sometimes hard to book date and time of hope, in the case of borrowing.<\/li>\n<\/ul><\/td>\n<td>Precompliance test with anechoic box minimizes the time and cost to use anechoic chamber in compliance test.<\/td>\n<\/tr>\n<\/tbody><\/table>\n<\/div>\n<p>Anechoic box is one of the very useful tool for EMI design of electronics, as shown in above table.<\/p>\n<p>In summary, anechoic box can:<\/p>\n<ol>\n<li>Help to expand the rules in EMI rule checker.<\/li>\n<li>Validate correlation between far field and near field.<\/li>\n<li>Minimize the time and cost to use anechoic chamber in compliance test. <\/li>\n<\/ol>\n\n\n\n<h2>System configuration<\/h2>\n<p style=\"margin-bottom:4px\"><i class=\"fas fa-square-full\" aria-hidden=\"true\"><\/i> Eexample<\/p>\n<table>\n<tbody>\n<tr>\n<td><a href=\"\/english\/products\/shield-box\/\">Electromagnetic anechoic box <\/a><\/td>\n<\/tr>\n<tr>\n<td> EMI measurement antenna<\/td>\n<\/tr>\n<tr>\n<td>Jigs to mount antenna and EUT<\/td>\n<\/tr>\n<tr>\n<td>Others(PC, I\/F modules, cables, etc)<\/td>\n<\/tr>\n<tr>\n<td><a href=\"\/english\/products\/spectrum-analyzer\/msa500\/msa538e.html\">Signal analyzer [MSA538E] <\/a><\/td>\n<\/tr>\n<\/tbody>\n<tfoot>\n<\/tfoot>\n<\/table>\n\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-5785 status-publish first instock product_cat-shop-category-msa500 product_cat-shop-category-handheld-spectrum-analyzer 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\/msa500\/msa538e.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\/msa538e_620x620-300x300.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\" srcset=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa538e_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa538e_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa538e_620x620-600x600.png 600w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa538e_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/msa538e_620x620.png 620w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><h2 class=\"woocommerce-loop-product__title\">Handheld Signal Analyzer MSA538E<\/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\/EMI_chamber_e.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) <\/span><\/a><\/div><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>Anechoic box can help EMI design of electronics over the development period. Application Various usages of anechoic box to design EMI characteristics of electronics are introduced. Solution Features of typical [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6455,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"vkexunit_cta_each_option":"","footnotes":""},"categories":[17],"tags":[44,66,71,73,75],"class_list":["post-2160","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-category-note","tag-app-emc","tag-market-emc","tag-application-emc","tag-application-shield-box","tag-application-spectrum-analyzer"],"_links":{"self":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2160","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=2160"}],"version-history":[{"count":1,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2160\/revisions"}],"predecessor-version":[{"id":7038,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2160\/revisions\/7038"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media\/6455"}],"wp:attachment":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media?parent=2160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/categories?post=2160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/tags?post=2160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}