{"id":432628,"date":"2025-05-27T10:31:28","date_gmt":"2025-05-27T10:31:28","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/lumerical-eme-solver\/"},"modified":"2025-05-27T10:31:28","modified_gmt":"2025-05-27T10:31:28","slug":"lumerical-eme-solver","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/lumerical-eme-solver\/","title":{"rendered":"Lumerical EME solver"},"content":{"rendered":"<p>&lt;p data-pm-slice=&#8221;1 1 []&#8221;&gt;Hi,&lt;\/p&gt;&lt;p data-pm-slice=&#8221;1 1 []&#8221;&gt;I have designed a 1&#215;2 splitter using the EME solver and attached a screenshot. I&#8217;m having trouble determining the appropriate dimensions for the ports. Could you provide guidance on what I should consider when choosing these dimensions? Additionally, I&#8217;m unsure about using the &#8220;use full simulation span&#8221; option. When this option is checked, it seems the ports automatically extend to match the EME simulation region, as shown in the screenshot. However, when I manually set different x-span and z-span values for the port, the resulting S-parameter values change. Is this expected behavior? Also, when using the &#8220;use full simulation span&#8221; option, the S-parameters (Abs^2 values) for S21 and S31 both yield 0.9834. I&#8217;m not entirely sure how accurate or reliable these results are. Could you provide any insight into this? I would greatly appreciate any clarification or best practices on setting port spans to ensure accurate simulation results.&nbsp;&lt;\/p&gt;&lt;p data-pm-slice=&#8221;1 1 []&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/05\/20-05-2025-1747774211-mceclip0.png\" \/>&lt;\/p&gt;&lt;p data-pm-slice=&#8221;1 1 []&#8221;&gt;&nbsp;&lt;\/p&gt;&lt;p data-pm-slice=&#8221;1 1 []&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/05\/20-05-2025-1747774231-mceclip1.png\" \/>&lt;\/p&gt;&lt;p data-pm-slice=&#8221;1 1 []&#8221;&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/05\/20-05-2025-1747774241-mceclip2.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-432628","topic","type-topic","status-publish","hentry","topic-tag-lumerical","topic-tag-LumericalEME-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27833"],"_bbp_topic_id":["432628"],"_bbp_subscription":["295289","33648"],"_bbp_author_ip":["194.27.125.188"],"_bbp_last_reply_id":["432910"],"_bbp_last_active_id":["432910"],"_bbp_last_active_time":["2025-05-29 22:50:07"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["295289","33648"],"_btv_view_count":["216"],"_bbp_topic_status":["unanswered"]},"test":"512105003ogr-uludag-edu-tr"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/432628","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\/432628\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=432628"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}