hfss differential trace excitation
dear thaihoa,
i dont agree with you.
If u dont define a mode HFSS will only solve for the dominant mode not for all modes.
Try to incerease the "mode" option in waveport wizard, you will see that the time will increase for the adaptive analysis.
dear hosseinali,
propogation inside a wg or cavity depends on the dimensions of the structures.
generally dominant mode is the one with 0's and 1's.(like TE10, TEM 010)
sometimes if you combine structures (like a wg and a cavity) dominant mode may be something like TE645 which is different from TE10 or TE01.
As a result dominant mode is the mode that is most closer to the cut off frequency.
Offcourse there may be more modes than dominant mode.
I suggest you to change the "mode" option in the excitation wizard in HFSS.and anlayze your system.
After then try to use "zoom region" and see the shapes of the modes depending on the number you have entered into "mode" option.
regards