{"id":159683,"date":"2021-06-21T12:30:29","date_gmt":"2021-06-21T12:30:29","guid":{"rendered":"\/forum\/forums\/topic\/computing-zpi-impedance-in-eigenmode-simulation-hfss\/"},"modified":"2021-07-09T15:12:27","modified_gmt":"2021-07-09T15:12:27","slug":"computing-zpi-impedance-in-eigenmode-simulation-hfss","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/computing-zpi-impedance-in-eigenmode-simulation-hfss\/","title":{"rendered":"Computing Zpi impedance in Eigenmode Simulation (HFSS)"},"content":{"rendered":"
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I am facing some issues when trying to use the Fields Calculator in ANSYS Electromagnetics Desktop (HFSS). The version I am using is 2020 R2.4.<\/p>\n

I am simulating a standard Grounded Coplanar Waveguide with HFSS. I have two different setups: one being a Driven Modal analysis and the second being an Eigenmode analysis. In the former, I have a Wave Port consisting of a 2D Rectangle. This Wave Port, after Driven Modal simulation, will give me a Zpi impedance. In principle, the impedance given by the simulator is computed from a 2D Eigenmode problem that is solved for the Waveport. I would like to do the same, directly on the Eigenmode simulation setup. <\/p>\n

In the Eigenmode simulation, there are no Waveports. I just have Primary and Secondary boundaries on the faces perpendicular to the longitudinal axis (X-axis, in this case) and PEC boundaries on the other faces. With this analysis, I get information regarding several modes propagating in the structure and their complex frequencies for a given phase delay in between the primary-secondary boundaries (namely, a phase constant Betta). I am also generating and saving the fields information of the simulation, therefore I should be able to compute the Zpi impedance of the crosssection of this transmission line (I created a rectangle). I am, however, not very familiar with the use of the Fields Calculator tool and therefore I feel stuck in obtaining this result.<\/p>\n

For this impedance, I should get the Power and divide it by the current squared to the power of 2. However, I keep receiving errors when I try to integrate the fields\/currents in the geometry of interest.<\/p>\n

Could anyone provide some help?<\/p>\n","protected":false},"template":"","class_list":["post-159683","topic","type-topic","status-closed","hentry","topic-tag-characteristic-impedance","topic-tag-eigenmode","topic-tag-hfss"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t