{"id":168985,"date":"2022-04-28T17:14:36","date_gmt":"2022-04-28T17:14:36","guid":{"rendered":"\/forum\/forums\/topic\/solving-adaptive-frequency-process-hf3d-error-failure-in-solving-matrix-please-contact-ansys\/"},"modified":"2022-05-12T21:25:21","modified_gmt":"2022-05-12T21:25:21","slug":"solving-adaptive-frequency-process-hf3d-error-failure-in-solving-matrix-please-contact-ansys","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/solving-adaptive-frequency-process-hf3d-error-failure-in-solving-matrix-please-contact-ansys\/","title":{"rendered":"Solving adaptive frequency …. process hf3d error: Failure in solving matrix. Please contact Ansys"},"content":{"rendered":"
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I have designed GCPW (Coplanar waveguide with the ground) on a two-layered substrate.<\/p>\n

The sweep frequency is between 500MHz to 2.5 or 3GHz.<\/p>\n

The substrate used consists of a thin ferrite film (bias field is applied correctly) in 800nm to 3um scale on top of a 0.5 mm-thick dielectric.<\/p>\n

To simplify the simulation, I used sheet PEC as conductors.<\/p>\n

The goal was to reduce electrode width to somewhere comparable to the film thickness.<\/p>\n

<\/p>\n<\/p>\n

When I simulated same structure but with 1um-thick copper conductor layers instead of PEC sheets, the solution converged.<\/p>\n

However, after reducing the electrode width to under 5um and applying sheet PEC conditions, my adaptive mesh does not converge.<\/p>\n

If the thin ferrite film was solely causing the problem, I believe the previous simulations with wider conductors should have failed too.<\/p>\n

But this only happens when the conductor and the thin film are both narrow and thin.<\/p>\n

I need help from someone who knows meshing well.<\/p>\n

<\/p>\n<\/p>\n

** P.S. I have also tried inside-selection and on-selection mesh conditions too.<\/p>\n

** Is there any way to force the mesh length in certain direction be fixed?<\/p>\n","protected":false},"template":"","class_list":["post-168985","topic","type-topic","status-closed","hentry"],"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