{"id":374572,"date":"2024-07-31T20:21:22","date_gmt":"2024-07-31T20:21:22","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-value-of-intensity-spectrum-with-the-far-field-project-analysis\/"},"modified":"2024-07-31T20:21:22","modified_gmt":"2024-07-31T20:21:22","slug":"negative-value-of-intensity-spectrum-with-the-far-field-project-analysis","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-value-of-intensity-spectrum-with-the-far-field-project-analysis\/","title":{"rendered":"Negative value of intensity spectrum with the far field project analysis"},"content":{"rendered":"<p>Hi all,<\/p>\n<p>I have a problem with simulating parabolic reflectors(PR) with two dipole sources around the focus. In the PR, I am looking at the light collection efficiency using the far-field projection analysis(https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360034395194-Changing-the-far-field-refractive-index-analysis-object).<\/p>\n<p>I put two dipole sources with out-of-phase (pi difference phases), and the result is the negative value of the intensity spectrum of the far field(=&#8221;T far 2&#8243; in the far-field projection analysis) which shouldn&#8217;t be a negative value! I believe there are some problems with the farfield3d calculation but I am not sure where this error comes from. Does anyone let me know what the problem is?<\/p>\n","protected":false},"template":"","class_list":["post-374572","topic","type-topic","status-closed","hentry","topic-tag-far-field-1","topic-tag-farfield-2","topic-tag-projection-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["442280","2592"],"_bbp_author_ip":["129.2.89.227"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["180"],"_bbp_topic_status":["unanswered"],"_bbp_notification_enabled":["442280","442280","442280"],"_bbp_topic_id":["374572"],"_bbp_forum_id":["27833"],"_bbp_engagement":["2592","442280"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["379186"],"_bbp_last_active_id":["379186"],"_bbp_last_active_time":["2024-08-15 15:10:26"]},"test":"jhsongumd-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/374572","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\/374572\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=374572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}