{"id":164287,"date":"2023-02-06T14:42:20","date_gmt":"2023-02-06T14:42:20","guid":{"rendered":"\/knowledge\/forums\/topic\/why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio\/"},"modified":"2023-07-31T12:36:39","modified_gmt":"2023-07-31T12:36:39","slug":"why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio\/","title":{"rendered":"Why do I get the following error in HFSS Transient when using waveports: \u201cPort refinement, process hf3d error: Port \u20181\u2019 contacts more than one non-conducting material which violates the TEM terminal modes restriction\u201d ?"},"content":{"rendered":"<p>Currently, the transient solver doesn&#8217;t support non-TEM mode ports. So TE &#038; TM port modes for waveguides for example won&#8217;t work, and neither will quasi-TEM port modes for structures like microstrip lines and coplanar waveguides. Only TEM are supported. A workaround for microstrip and coplanar waveguide structures would be to use a lumped port between the signal conductor and ground. Do this, instead of using a waveport, whose geometry would extend to the air above the microstrip line (and touching multiple conductors), thus supporting quasi-TEM port modes. The lumped port will support purely TEM modes, thus getting rid of this error.<\/p>\n","protected":false},"template":"","class_list":["post-164287","topic","type-topic","status-publish","hentry","topic-tag-17-2","topic-tag-electromagnetics-electronics","topic-tag-excitations","topic-tag-hfss","topic-tag-wave-port"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Currently, the transient solver doesn&#039;t support non-TEM mode ports. So TE &amp; TM port modes for waveguides for example won&#039;t work, and neither will quasi-TEM port modes for structures like microstrip lines and coplanar waveguides. Only TEM are supported. A workaround for microstrip and coplanar waveguide structures would be to use a lumped port between\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio\/\" \/>\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 Knowledge | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Why do I get the following error in HFSS Transient when using waveports: \u201cPort refinement, process hf3d error: Port \u20181\u2019 contacts more than one non-conducting material which violates the TEM terminal modes restriction\u201d ? | Ansys Knowledge\" \/>\n\t\t<meta property=\"og:description\" content=\"Currently, the transient solver doesn&#039;t support non-TEM mode ports. So TE &amp; TM port modes for waveguides for example won&#039;t work, and neither will quasi-TEM port modes for structures like microstrip lines and coplanar waveguides. Only TEM are supported. A workaround for microstrip and coplanar waveguide structures would be to use a lumped port between\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-02-06T14:42:20+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-07-31T12:36:39+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Why do I get the following error in HFSS Transient when using waveports: \u201cPort refinement, process hf3d error: Port \u20181\u2019 contacts more than one non-conducting material which violates the TEM terminal modes restriction\u201d ? | Ansys Knowledge\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Currently, the transient solver doesn&#039;t support non-TEM mode ports. So TE &amp; TM port modes for waveguides for example won&#039;t work, and neither will quasi-TEM port modes for structures like microstrip lines and coplanar waveguides. Only TEM are supported. A workaround for microstrip and coplanar waveguide structures would be to use a lumped port between\" \/>\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\\\/knowledge\\\/forums\\\/topic\\\/why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/excitations\\\/#listItem\",\"name\":\"excitations\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/excitations\\\/#listItem\",\"position\":3,\"name\":\"excitations\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/excitations\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio\\\/#listItem\",\"name\":\"Why do I get the following error in HFSS Transient when using waveports: \\u201cPort refinement, process hf3d error: Port \\u20181\\u2019 contacts more than one non-conducting material which violates the TEM terminal modes restriction\\u201d ?\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio\\\/#listItem\",\"position\":4,\"name\":\"Why do I get the following error in HFSS Transient when using waveports: \\u201cPort refinement, process hf3d error: Port \\u20181\\u2019 contacts more than one non-conducting material which violates the TEM terminal modes restriction\\u201d ?\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic-tag\\\/excitations\\\/#listItem\",\"name\":\"excitations\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/#organization\",\"name\":\"Ansys Knowledge\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/knowledge\\\/forums\\\/topic\\\/why-do-i-get-the-following-error-in-hfss-transient-when-using-waveports-port-refinement-process-hf3d-error-port-1-contacts-more-than-one-non-conducting-material-which-vio\\\/\",\"name\":\"Why do I get the following error in HFSS Transient when using waveports: \\u201cPort refinement, process hf3d error: Port \\u20181\\u2019 contacts more than one non-conducting material which violates the TEM terminal modes restriction\\u201d ? | Ansys Knowledge\",\"description\":\"Currently, the transient solver doesn't support non-TEM mode ports. So TE & TM port modes for waveguides for example won't work, and neither will quasi-TEM port modes for structures like microstrip lines and coplanar waveguides. Only TEM are supported. 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So TE &amp; TM port modes for waveguides for example won't work, and neither will quasi-TEM port modes for structures like microstrip lines and coplanar waveguides. Only TEM are supported. 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