Guilin Sun
Ansys Employee
Sorry, you are simulating different device from what you expect!
mode is supposed to travel in an infinitely long waveguide so you can use FDE to get it.
When the "waveguide" has limited length, it is a cavity! in a cavity you can only collect result outside of it, not inside, as inside it is the standing wave.
T_total, T_forward and etc are listed in the table with explanations. I personally do not have additional information. Please let me know if you have any specific question, after reading all the replies here and in other posts.
You may mix up the theories about the stable modes and the excitation of modes as well as cavity modes.
Please take some time to think over what exactly you want to simulate: how do you apply a dipole in experiment? how do you know the top and bottom monitors only record the fundamental modes, where they locate in uniform background material, and mostly like in air? can the mode exist in the uniform material? what the definition of a mode?
A little note:
According to the screenshot, you are simulating a rod on a substrate, and place a dipole inside the rod. It is a cavity, and the dipole will excite all possible modes, including intermediate modes, radiation modes, and possibly non-propagation fields. However you expect it only excites the fundamental modes. and further, you want to use monitors in uniform material to capture the mode results, where the modes should be only inside the waveguide or cavity. You may compare them with theory in textbook, and please pay attention to the description of assumptions.

Please read all the replies in other posts, rethink what you want to do and let me know if you have any specific questions. Please also note tat we will mainly support simulation/software questions as theories are so broad that we (I) may not have sufficient knowledge outside the normal knowledge. Maybe you are creating some thing very new.