Hello cst-learner,
Mircowave studio is very user friendly, dont get panic!
If you want to simulate your dielectric resonator in isolation, the simplest
approach is to use the 'Eigenmode' solver. This will help you to investigate
and study the possible modes that it can support. Then you will be able to
understand how to couple the dielectric resonator with an external network,
such as a microstrip line. Use magnetic wall approximation in the boundary conditions (I assume that your er is relatively high, i.e. >20, otherwise
some possible deviations can incur. )
To my opinion, before you do anything else, it is very important to understand
what a mode is, how to classify them (TE, TM, HEM), and how to recognise
their field pattern. As a student i really struggled to get a clear idea of how to
approach these concepts, but without them you can't connect the physical
structure with a measurement. Check book from Kajfez 'Dielectric Resonators'.
When you feel more in control, then proceed with the transient solver.
The latter solver will simulate the effects both of the dielectric resonator and
the feeding structure.
Good luck, RF design is not easy but you can get good salary as an RF engineer