{"id":301973,"date":"2023-08-17T18:36:17","date_gmt":"2023-08-17T18:36:17","guid":{"rendered":"\/forum\/forums\/topic\/huge-backlobe-from-complete-pec-backed-metasurface-in-3d-radiation-plot\/"},"modified":"2023-08-17T19:03:24","modified_gmt":"2023-08-17T19:03:24","slug":"huge-backlobe-from-complete-pec-backed-metasurface-in-3d-radiation-plot","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/huge-backlobe-from-complete-pec-backed-metasurface-in-3d-radiation-plot\/","title":{"rendered":"Huge backlobe from complete PEC backed metasurface in 3D radiation plot."},"content":{"rendered":"

\"\"I am trying to simulate a completely PEC backed reflective metasurface with finite number of unit cells. I used incident plane wave (travelling at -z direction) to excite my finite array, which is located in x-y plane. I happen to get most prominent reflection from the back side of the PEC(i.e., along -z direction). However, I expect my reflections from the metasurface only along +z direction\/ along some desired direction, as I have PEC at z=0.<\/p>\n

I tried using Open boundaries and FE-BI region for the metasurface with no luck. I also tried illuminating the surface with a horn, where both horn and metasurface were surrounded by FE-BI region. All produced erronious huge backlobe from the metasurface PEC backed ground layer.<\/p>\n

kindly suggest how to simulate this situation.<\/p>\n","protected":false},"template":"","class_list":["post-301973","topic","type-topic","status-closed","hentry","topic-tag-2dmaterialsandmetals-1","topic-tag-metamaterials-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["14322","28551","288088"],"_bbp_author_ip":["96.7.218.223"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["688"],"_edit_lock":["1692298398:228004"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["301973"],"_bbp_forum_id":["27793"],"_bbp_engagement":["14322","28551","288088"],"_bbp_voice_count":["3"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["305503"],"_bbp_last_active_id":["305503"],"_bbp_last_active_time":["2023-09-08 10:07:39"]},"test":"sylvierana21iitk-ac-in"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/301973","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\/301973\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=301973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}