{"id":308909,"date":"2023-09-27T05:13:40","date_gmt":"2023-09-27T05:13:40","guid":{"rendered":"\/forum\/forums\/topic\/complex-impedance-for-hfss-design\/"},"modified":"2023-09-27T05:13:40","modified_gmt":"2023-09-27T05:13:40","slug":"complex-impedance-for-hfss-design","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/complex-impedance-for-hfss-design\/","title":{"rendered":"Complex Impedance for HFSS Design"},"content":{"rendered":"<p>When specifying a complex impedance for lumped ports in an HFSS design for FEM simulations in unit cell analysis, I get very strange results that don&#8217;t look correct, specifically in the 400-420 GHz range. For example, in the port impedance I specified 76.9-1i*75.46 (per the HFSS menu setup recommendation) and then simulate. Looking at the S11 return loss we see the following:<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/27-09-2023-1695791441-mceclip1.png\"><\/p>\n<p>Background, this a simple patch antenna with 3 ports.<\/p>\n<p>Is there anything we need to setup prior to using complex impedances? What could be causing this type of response?<\/p>\n<p>&nbsp;<\/p>\n<p>Any help is appreciated, thank you!<\/p>\n","protected":false},"template":"","class_list":["post-308909","topic","type-topic","status-closed","hentry","topic-tag-impedance","topic-tag-lumped-port","topic-tag-patch-antenna","topic-tag-unitcell-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["294361","28551"],"_bbp_author_ip":["96.7.74.191"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1704"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["308909"],"_bbp_forum_id":["27793"],"_bbp_engagement":["28551","294361"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["309553"],"_bbp_last_active_id":["309553"],"_bbp_last_active_time":["2023-09-30 19:01:06"]},"test":"rraldiriasu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/308909","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\/308909\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=308909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}