Hi, I use HFSS to draw impedance smith chart and get a strange chart, from previous post somebody also meet with such problem and said it was due to |s11|>1, in my case I don't think so,because all my simulation projects show such strange chart...
Thanks, but I plot |s11| in dB and it is lower than 0 on the whole frequency band, I don't think it is |s11| that causes the problem, also all the projects that work well show the same problem, it maybe impossible they all go wrong...
Why do you think the impedance plot is strange? |S11| > 1 would refer to negative real impedance, it's obviously not the case here, impedance locus stays in right half plane.