{"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":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["1-24-2023  20:20:12"],"_bbp_forum_id":["27819"],"_bbp_author_ip":["23.56.168.180"],"_btv_view_count":["6511"],"siebel_km_number":["2043654"],"product_version":["17.2"],"km_published_date":["2016-10-04T19:06:46.000Z"],"family":["Electromagnetics & Electronics"],"application_name":["HFSS"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/164287","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/164287\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=164287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}