{"id":350430,"date":"2024-02-11T14:54:16","date_gmt":"2024-02-11T14:54:16","guid":{"rendered":"\/forum\/forums\/topic\/arbitrary-sign-for-eigen-mode\/"},"modified":"2024-02-22T19:25:12","modified_gmt":"2024-02-22T19:25:12","slug":"arbitrary-sign-for-eigen-mode","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/arbitrary-sign-for-eigen-mode\/","title":{"rendered":"Arbitrary sign for eigen mode"},"content":{"rendered":"<p>Imagine two straight rectangular waveguides with ports along the propagation direction.<\/p>\n<p>Each port sees a similar 2D slice, but can calculate the eigenmode with a different sign; mostly for the anti-symmetric mode.<\/p>\n<p>I can see this when looking at the S-matrix from FDTD simulation.<\/p>\n<p>What would be the best way to regularize that ?<\/p>\n<p>How can I overlap the modes from different ports with the source port (in order to obtain this sign directly) ?<\/p>\n<p>`expand` does not seem to hundle ports<\/p>\n","protected":false},"template":"","class_list":["post-350430","topic","type-topic","status-closed","hentry","topic-tag-bug","topic-tag-eigenmode","topic-tag-fdtd","topic-tag-feature-request","topic-tag-s-matrix-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["66085","2592"],"_bbp_author_ip":["23.206.193.41"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1535"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1708629894:285491"],"_bbp_topic_id":["350430"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","66085"],"_bbp_voice_count":["2"],"_bbp_reply_count":["39"],"_bbp_last_reply_id":["359883"],"_bbp_last_active_id":["359883"],"_bbp_last_active_time":["2024-04-01 18:29:46"]},"test":"amitrotem2tauex-tau-ac-il"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/350430","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/350430\/revisions"}],"predecessor-version":[{"id":353256,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/350430\/revisions\/353256"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=350430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}