Re: hfss-arc-2D
the thickness of metal line is 0.035 or 0.0175 mm? I do not understand such a big aspect ratio you mentioned comes from where. Do you mean the aspect ratio of length vs. thickness of trace? Yes, the upper limit of HFSS do deal with extremely unregular shape object is around 1000:1,
But I think for you design, if should ok, since there are still other techniques we can employ to cut down computational cost, such as symmetric plane.
Best Regards,