{"id":382341,"date":"2024-09-11T14:58:06","date_gmt":"2024-09-11T14:58:06","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/382341\/"},"modified":"2024-09-11T14:58:06","modified_gmt":"2024-09-11T14:58:06","slug":"382341","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/382341\/","title":{"rendered":"Reply To: Both Frequency and Time domain(transient) simulation in HFSS"},"content":{"rendered":"<p>&lt;p&gt;Hello Sghose,&nbsp;&lt;\/p&gt;&lt;p&gt;Thank you for reaching out to Ansys Learning Forum.&nbsp;&lt;\/p&gt;&lt;p&gt;Indeed, it is possible to do Transient Analysis and of course Frequency Domain Simulations using Ansys HFSS.&nbsp;&lt;\/p&gt;&lt;p&gt;Hidden in the documentation you may find the answer regarding Transient Analysis &amp; The requirements that the materials need to meet for this type of Analysis.&lt;\/p&gt;&lt;p&gt;To be more specific, Materials for transient solutions must meet these requirements:&lt;\/p&gt;&lt;ul class=&#8221;BulletList&#8221; type=&#8221;disc&#8221;&gt;&lt;li class=&#8221;BulletList&#8221;&gt;Materials cannot have arbitrary frequency dependence in a time-domain analysis. For lossy dielectrics, a Debye model&nbsp;is applied to ensure that the loss remain physical across the spectrum. For lossy metals, a&nbsp;Pad&eacute; approximation&nbsp;is used for the same reason.<\/li>\n<p>&lt;li class=&#8221;BulletList&#8221;&gt;When lossy materials touch a port, the port solver will launch an excitation that fits the lossless case. This is inherent to most time-domain solvers. The 3D part of the simulation will take losses into account correctly.<\/li>\n<p>&lt;li class=&#8221;BulletList&#8221;&gt;Spatially dependent material&nbsp;properties can be specified through&nbsp;user-defined variables in HFSS. Spatially dependent materials are usually applied for modeling dielectric lens, dielectric waveguides, substrates with graded doping profiles, and graded-index fibers.<\/li>\n<\/ul>\n<p>&lt;p&gt;More information can be drawn by looking into HFSS Help documentation&gt;HFSS Transient.&nbsp;&lt;\/p&gt;&lt;p&gt;I hope this helps! \ud83d\ude04&lt;\/p&gt;&lt;p&gt;Have a nice rest of the day,&nbsp;&lt;br&gt;Kind regards,&nbsp;&lt;br&gt;Jason.&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-382341","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/382341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/382341\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=382341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}