{"id":362925,"date":"2024-04-18T11:21:52","date_gmt":"2024-04-18T11:21:52","guid":{"rendered":"\/forum\/forums\/topic\/poynting-vector-in-ansys-hfss\/"},"modified":"2024-04-18T11:21:52","modified_gmt":"2024-04-18T11:21:52","slug":"poynting-vector-in-ansys-hfss","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/poynting-vector-in-ansys-hfss\/","title":{"rendered":"Poynting vector in Ansys HFSS"},"content":{"rendered":"<p>I am trying to use HFSS to give an example to my students about poynting vector. The model I am simulating is a simple rectangular waveguide (WR340) of 20 cm long and with an input signal of 2.45 GHz and 1 W. On both sides a wave port is assigned. The poynting vector is calculated in a non-model surface in both ports and in the middle of the waveguide as seen in the image.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/18-04-2024-1713438632-mceclip0.png\" width=\"504\" height=\"289\">&nbsp;<\/p>\n<p>The poynting vector has been calculated using fields calculator tool by selecting the real poynting vector and integrating it on a selected surface. With an input signal of 1 W and ports on both sides, the value of the power through each surface should be exactly 1 W (or a bit less because of losses). However, the evaluated power is 1.019 W on the input port, 1.017 W on the output port and 1.008 W on the middle of the waveguide.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/18-04-2024-1713439111-mceclip1.png\" width=\"454\" height=\"124\"><\/p>\n<p>So I would appreciate if someone could with a me hint why this happens. Thank you all.&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-362925","topic","type-topic","status-closed","hentry","topic-tag-waveguide-2","topic-tag-ansys-hfss","topic-tag-hfss"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["343976","1178"],"_bbp_author_ip":["23.206.193.41"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1047"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["362925"],"_bbp_forum_id":["27793"],"_bbp_engagement":["1178","343976"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["366341"],"_bbp_last_active_id":["366341"],"_bbp_last_active_time":["2024-05-09 19:59:14"]},"test":"andonips98gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/362925","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\/362925\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=362925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}