{"id":372298,"date":"2024-07-17T08:52:59","date_gmt":"2024-07-17T08:52:59","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fdtd-error-the-source-is-not-large-enough-to-calculate-a-mode\/"},"modified":"2024-07-17T08:52:59","modified_gmt":"2024-07-17T08:52:59","slug":"fdtd-error-the-source-is-not-large-enough-to-calculate-a-mode","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fdtd-error-the-source-is-not-large-enough-to-calculate-a-mode\/","title":{"rendered":"FDTD error: The source is not large enough to calculate a mode"},"content":{"rendered":"<p>Hello,&nbsp;<\/p>\n<p>I am simulating a waveguide with a ring next to it with FDTD. I added two ports, one for the output and one for the input. The modal properties are the follwoing for the input port.<br \/><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/17-07-2024-1721201777-mceclip0.png\"><\/p>\n<p>If I click on Visualize Mode Data I get the follwoing errors:<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/17-07-2024-1721201820-mceclip1.png\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/17-07-2024-1721201831-mceclip2.png\"><\/p>\n<p>As shown in the follwoing picture the waveguide is within the port.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/17-07-2024-1721201977-mceclip3.png\"><\/p>\n<p>The overall layout is the following:<br \/><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/17-07-2024-1721202394-mceclip4.png\"><\/p>\n<p>I am happy about any hint. Thank you in advance,<br \/>Tim<\/p>\n","protected":false},"template":"","class_list":["post-372298","topic","type-topic","status-closed","hentry","topic-tag-LumericalFDTD-1","topic-tag-photonics","topic-tag-portsetup-1","topic-tag-ports-2"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello, I am simulating a waveguide with a ring next to it with FDTD. I added two ports, one for the output and one for the input. The modal properties are the follwoing for the input port.If I click on Visualize Mode Data I get the follwoing errors:As shown in the follwoing picture the waveguide is\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fdtd-error-the-source-is-not-large-enough-to-calculate-a-mode\/\" \/>\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=\"FDTD error: The source is not large enough to calculate a mode | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hello, I am simulating a waveguide with a ring next to it with FDTD. I added two ports, one for the output and one for the input. 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I added two ports, one for the output and one for the input. 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