{"id":387007,"date":"2024-09-25T14:46:27","date_gmt":"2024-09-25T14:46:27","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/which-port-should-i-use-lumped-or-waveport\/"},"modified":"2024-09-25T14:46:27","modified_gmt":"2024-09-25T14:46:27","slug":"which-port-should-i-use-lumped-or-waveport","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/which-port-should-i-use-lumped-or-waveport\/","title":{"rendered":"Which port should I use, lumped or waveport?"},"content":{"rendered":"<p>&lt;p&gt;Hi everyone,&lt;\/p&gt;&lt;p&gt;I&rsquo;m new to ANSYS HFSS and need some guidance on simulating a coplanar waveguide (CPW) with a discontinuity due to a via that conducts the signal to a lower level on the PCB. I&rsquo;m interested in analyzing the impedance of the CPW, as well as the S11 and S21 parameters.&lt;\/p&gt;&lt;p&gt;I&#8217;ve noticed that when I use a lumped port, I consistently get 50 ohms as the impedance on all frequency sweep, which doesn&rsquo;t reflect the actual behavior. On the other hand, when I use a wave port, I see that the size and position of the port significantly affects the simulated impedance.&lt;\/p&gt;&lt;p&gt;Could anyone advise me on which port type would be more appropriate for my simulation?&lt;\/p&gt;&lt;p&gt;Thanks in advance for your help!&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-387007","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi everyone,I\u2019m new to ANSYS HFSS and need some guidance on simulating a coplanar waveguide (CPW) with a discontinuity due to a via that conducts the signal to a lower level on the PCB. I\u2019m interested in analyzing the impedance of the CPW, as well as the S11 and S21 parameters.I&#039;ve noticed that when I\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/which-port-should-i-use-lumped-or-waveport\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Which port should I use, lumped or waveport? | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi everyone,I\u2019m new to ANSYS HFSS and need some guidance on simulating a coplanar waveguide (CPW) with a discontinuity due to a via that conducts the signal to a lower level on the PCB. 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