Hello everybody, I'm a newbie on HFSS. There are two problems I need to solve: how can I add excitation for a circular pipe like figure below, and how can I observe the effect of skin effect and proximity effect in HFSS? I've tried mesh ->on selection->skin effect based and solve inside, but the Q I got in eigen mode is 4 times bigger than the experimental result and I can not observe these influences clearly. When I try to use other solve mode, I find it's hard to add port or terminal for the pipe. Thanks for your reading and help!