{"id":219891,"date":"2022-07-25T10:28:21","date_gmt":"2022-07-25T10:28:21","guid":{"rendered":"\/forum\/forums\/topic\/appropriate-way-to-assign-excitation-to-a-log-periodic-dipole-wire-antenna\/"},"modified":"2022-07-25T10:28:21","modified_gmt":"2022-07-25T10:28:21","slug":"appropriate-way-to-assign-excitation-to-a-log-periodic-dipole-wire-antenna","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/appropriate-way-to-assign-excitation-to-a-log-periodic-dipole-wire-antenna\/","title":{"rendered":"Appropriate way to assign excitation to a Log-Periodic-Dipole (Wire)-antenna."},"content":{"rendered":"<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/25-07-2022-1658743981-LPDA-Setup.png\" alt=\"\"> <img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/25-07-2022-1658744489-log_periodic_array.webp\" alt=\"\"><\/p>\n<p>Hello peers, I have been trying to simulate and observe &#8220;directivity&#8221; of a LPDA antenna as portrayed in the attached image on the left corner. This is comprised of wire dipoles.&nbsp;<\/p>\n<p>There are two things I have been extremely concerned of,<\/p>\n<p>(1) How to assign excitation appropriately to the LPDA ? Shall it be &#8220;lumped port&#8221; at the top via &#8220;rectangular sheet&#8221; with defined line ? or shall I make these wires hollow and then apply &#8220;wave port&#8221; ??&nbsp; So, essentially, how to assign excitation to my LPDA structure ?<\/p>\n<p>(2) Often I have observed a stud at the bottom connecting the booms. So, do I have to connect the bottom of the boom with some wire or pec material ?&nbsp;<\/p>\n<p>Kindly, please have your valuable extertise. Thanks.&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-219891","topic","type-topic","status-closed","hentry","topic-tag-connection-wires","topic-tag-dipole","topic-tag-excitation","topic-tag-log-periodic"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["260591","191"],"_bbp_author_ip":["23.218.93.53"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1191"],"_bbp_likes_count":["1"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["219891"],"_bbp_forum_id":["27793"],"_bbp_engagement":["191","260591"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["223016"],"_bbp_last_active_id":["223016"],"_bbp_last_active_time":["2022-08-02 11:25:44"]},"test":"sahasiitk-ac-in"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/219891","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\/219891\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=219891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}