{"id":395869,"date":"2024-12-01T04:56:19","date_gmt":"2024-12-01T04:56:19","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/branchline-quadrature-hybrid-error\/"},"modified":"2024-12-01T04:56:19","modified_gmt":"2024-12-01T04:56:19","slug":"branchline-quadrature-hybrid-error","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/branchline-quadrature-hybrid-error\/","title":{"rendered":"Branchline Quadrature Hybrid error"},"content":{"rendered":"<p>&lt;p&gt;I am learning the course with the Branch line coupler in Lesson 2. After simulating the coupler in circuit, I use the circuit component provided within HFSS, where I put my optimized values for the coupler. The coupler I designed on Taconic RF-35 substrate, thickness of 1.52 mm, DK = 3.5. However, after I inserted all of the input parameters as shown in the tutorial video, I receive a message, which is shown below:&lt;\/p&gt;&lt;p&gt;&lt;br&gt;<strong><em>Coupler-5GHz-component (D:\/SIMULATION\/COUPLER 4PORTS\/)<\/em><\/strong>&lt;br&gt;<strong><em>&nbsp; Circuit1<\/em><\/strong>&lt;br&gt;<strong><em>&nbsp; &nbsp; [info] Nexxim simulation will use local parameter scoping. To change this option, please go to Tools&gt;Options&gt;General Options&gt;Circuit Design (11:52:42 AM &nbsp;Dec 01, 2024)<\/em><\/strong>&lt;br&gt;<strong><em>&nbsp; &nbsp; [info] (info): Processing circuit for new analysis. (11:52:43 AM &nbsp;Dec 01, 2024)<\/em><\/strong>&lt;br&gt;<strong><em>&nbsp; &nbsp; [warning] models:s_element(warning): amscoupb:11.s &#8211; S-parameter data &nbsp;is not passive. Worst violation of 0.0102162 at 5.39e+09 (Hz). (11:52:43 AM &nbsp;Dec 01, 2024)<\/em><\/strong>&lt;br&gt;<strong><em>&nbsp; &nbsp; [info] (info): Starting analysis type LNA. (11:52:44 AM &nbsp;Dec 01, 2024)<\/em><\/strong>&lt;br&gt;<strong><em>&nbsp; &nbsp; [info] (info): Simulation succeeded. Total simulator time: 0:00:00 (11:52:44 AM &nbsp;Dec 01, 2024)<\/em><\/strong>&lt;br&gt;&lt;br&gt;&lt;\/p&gt;&lt;p&gt;The results I obtained are not like what I got when I simulated with circuit component, which is clearly not as what shown in the video. Please help me out with this issue. Is there anything that I am missing while doing this simulation.&lt;\/p&gt;&lt;p&gt;Thank you in advance.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-395869","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=\"I am learning the course with the Branch line coupler in Lesson 2. After simulating the coupler in circuit, I use the circuit component provided within HFSS, where I put my optimized values for the coupler. 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