{"id":408200,"date":"2025-02-03T17:22:49","date_gmt":"2025-02-03T17:22:49","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/hfss-simulation-erratic-s-parameter-results\/"},"modified":"2025-02-03T17:22:49","modified_gmt":"2025-02-03T17:22:49","slug":"hfss-simulation-erratic-s-parameter-results","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/hfss-simulation-erratic-s-parameter-results\/","title":{"rendered":"HFSS Simulation Erratic S-parameter results"},"content":{"rendered":"<p>&lt;p&gt;I am trying to design a waveguide-to-microstrip transition for Ka-band operation, but my simulation results give me some very poor looking results as shown in the attached picture. Would this be considered resonance? Or have I improperly defined my wave ports and\/or boundaries? I haven&#8217;t been able to find a solution for this, meaning I don&#8217;t know if it is a design issue or a simulation setup issue. has anyone ever seen something like this?&lt;\/p&gt;&lt;p&gt;&nbsp;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/02\/03-02-2025-1738603289-HFSS_WG2MS_results.png\" alt=\"Ka-Band Waveguide to Microstrip Transition S-parameter Results\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-408200","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27793"],"_bbp_topic_id":["408200"],"_bbp_subscription":["510475","28551","114268"],"_bbp_author_ip":["192.249.1.134"],"_bbp_last_reply_id":["426182"],"_bbp_last_active_id":["426182"],"_bbp_last_active_time":["2025-03-19 13:33:15"],"_bbp_reply_count":["4"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["3"],"_bbp_engagement":["510475","28551","114268"],"_btv_view_count":["338"],"_bbp_topic_status":["unanswered"]},"test":"cweave31vols-utk-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/408200","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/408200\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=408200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}