{"id":361589,"date":"2024-04-10T17:16:39","date_gmt":"2024-04-10T17:16:39","guid":{"rendered":"\/forum\/forums\/reply\/361589\/"},"modified":"2024-04-10T17:16:39","modified_gmt":"2024-04-10T17:16:39","slug":"361589","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/","title":{"rendered":"Reply To: The meaning of abs^2 in S-parameter"},"content":{"rendered":"<p>&lt;p&gt;1: As you know, S is amplitude parameter. So abs^2 is the intensity\/power parameter. For 2X2 device, abs(S11)^2 is power reflection and abs(S21)^2 is the power transmission for the specific mode.&lt;\/p&gt;&lt;p&gt;2: if you want to get result in dB, for abs^2, it is 10log10. for abs(S), it is 20log10.&lt;\/p&gt;&lt;p&gt;BTW: you mentioned you sweept wavelengh in FDTD? in the port\/mode case, once you use broadband, you do not need to sweep since FDTD can give you broadband result from one simulation.&nbsp;&lt;\/p&gt;&lt;p&gt;<a href=\"https:\/\/optics.ansys.com\/hc\/en-us\/search\/click?data=BAh7DjoHaWRsKwjFoMDTUwA6D2FjY291bnRfaWRpA02AjDoJdHlwZUkiDGFydGljbGUGOgZFVDoIdXJsSSJhaHR0cHM6Ly9vcHRpY3MuYW5zeXMuY29tL2hjL2VuLXVzL2FydGljbGVzLzM2MDAzNDkwMjIxMy1Nb2RlLXNvdXJjZS1pbi1icm9hZGJhbmQtc2ltdWxhdGlvbnMGOwhUOg5zZWFyY2hfaWRJIikyY2Q3MGIzNC0xOTg2LTQ0NjEtYTFhZi1hZTQ0ZGFjNDQyNjEGOwhGOglyYW5raQY6C2xvY2FsZUkiCmVuLXVzBjsIVDoKcXVlcnlJIhVicm9hZGJhbmQgc291cmNlBjsIVDoScmVzdWx0c19jb3VudGkC%2FAI%3D--d7cd45f8d4bdd250d9df28da43dda5186a00cc91\">Mode source in broadband simulations<\/a>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-361589","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"1: As you know, S is amplitude parameter. So abs^2 is the intensity\/power parameter. For 2X2 device, abs(S11)^2 is power reflection and abs(S21)^2 is the power transmission for the specific mode.2: if you want to get result in dB, for abs^2, it is 10log10. for abs(S), it is 20log10.BTW: you mentioned you sweept wavelengh in\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: The meaning of abs^2 in S-parameter | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"1: As you know, S is amplitude parameter. So abs^2 is the intensity\/power parameter. For 2X2 device, abs(S11)^2 is power reflection and abs(S21)^2 is the power transmission for the specific mode.2: if you want to get result in dB, for abs^2, it is 10log10. for abs(S), it is 20log10.BTW: you mentioned you sweept wavelengh in\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-04-10T17:16:39+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-04-10T17:16:39+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: The meaning of abs^2 in S-parameter | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"1: As you know, S is amplitude parameter. So abs^2 is the intensity\/power parameter. For 2X2 device, abs(S11)^2 is power reflection and abs(S21)^2 is the power transmission for the specific mode.2: if you want to get result in dB, for abs^2, it is 10log10. for abs(S), it is 20log10.BTW: you mentioned you sweept wavelengh in\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/361589\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/361589\\\/#listItem\",\"name\":\"Reply To: The meaning of abs^2 in S-parameter\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/361589\\\/#listItem\",\"position\":2,\"name\":\"Reply To: The meaning of abs^2 in S-parameter\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/361589\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/361589\\\/\",\"name\":\"Reply To: The meaning of abs^2 in S-parameter | Ansys Learning Forum\",\"description\":\"1: As you know, S is amplitude parameter. So abs^2 is the intensity\\\/power parameter. For 2X2 device, abs(S11)^2 is power reflection and abs(S21)^2 is the power transmission for the specific mode.2: if you want to get result in dB, for abs^2, it is 10log10. for abs(S), it is 20log10.BTW: you mentioned you sweept wavelengh in\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/361589\\\/#breadcrumblist\"},\"datePublished\":\"2024-04-10T17:16:39+00:00\",\"dateModified\":\"2024-04-10T17:16:39+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Reply To: The meaning of abs^2 in S-parameter | Ansys Learning Forum","description":"1: As you know, S is amplitude parameter. So abs^2 is the intensity\/power parameter. For 2X2 device, abs(S11)^2 is power reflection and abs(S21)^2 is the power transmission for the specific mode.2: if you want to get result in dB, for abs^2, it is 10log10. for abs(S), it is 20log10.BTW: you mentioned you sweept wavelengh in","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/forum","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/#listItem","name":"Reply To: The meaning of abs^2 in S-parameter"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/#listItem","position":2,"name":"Reply To: The meaning of abs^2 in S-parameter","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization","name":"Ansys Learning Forum","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/forum\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/","name":"Reply To: The meaning of abs^2 in S-parameter | Ansys Learning Forum","description":"1: As you know, S is amplitude parameter. So abs^2 is the intensity\/power parameter. For 2X2 device, abs(S11)^2 is power reflection and abs(S21)^2 is the power transmission for the specific mode.2: if you want to get result in dB, for abs^2, it is 10log10. for abs(S), it is 20log10.BTW: you mentioned you sweept wavelengh in","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/#breadcrumblist"},"datePublished":"2024-04-10T17:16:39+00:00","dateModified":"2024-04-10T17:16:39+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"Reply To: The meaning of abs^2 in S-parameter | Ansys Learning Forum","og:description":"1: As you know, S is amplitude parameter. So abs^2 is the intensity\/power parameter. For 2X2 device, abs(S11)^2 is power reflection and abs(S21)^2 is the power transmission for the specific mode.2: if you want to get result in dB, for abs^2, it is 10log10. for abs(S), it is 20log10.BTW: you mentioned you sweept wavelengh in","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/","article:published_time":"2024-04-10T17:16:39+00:00","article:modified_time":"2024-04-10T17:16:39+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: The meaning of abs^2 in S-parameter | Ansys Learning Forum","twitter:description":"1: As you know, S is amplitude parameter. So abs^2 is the intensity\/power parameter. For 2X2 device, abs(S11)^2 is power reflection and abs(S21)^2 is the power transmission for the specific mode.2: if you want to get result in dB, for abs^2, it is 10log10. for abs(S), it is 20log10.BTW: you mentioned you sweept wavelengh in"},"aioseo_meta_data":{"post_id":"361589","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 16:49:23","updated":"2026-08-12 07:11:12","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tReply To: The meaning of abs^2 in S-parameter\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Reply To: The meaning of abs^2 in S-parameter","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/361589\/"}],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/361589","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/361589\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=361589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}