Evanescent Microwave Probe stripline simulation

Does anyone have experience and/or suggestions with the critical
parameters for designing an Evanescent Microwave probe
(using stripline) and how one determines it's performance
using simulation tools. I am currently using MWS, but I read that maybe analysis of evanescent modes may not be so accurate with MWS?

to analyze evanescent waves you will nee to assign a highly dense mesh around the evanescent region. Such a problem is not easy for any simulation software.

I have been adjusting the lines/wavelength to increase resolution, to no real avail regarding microstrips. I have got some reasonable results with a cavity resonator though.
Why is this? Is there something peculiar about striplines and their evanescent behaviour due to design parameters/structue.

I could try local (?) mesh density increase as you say. I'm sure this is possible, isn't it? It would be similar to lines/wavelength, no?

I am doing some simulations to resolve evanescent waves. Though in some other context. But as you ve suggested, increasing the mesh density (local mesh density) near the object where you expect evanescent waves helps.

My current conclusions regarding CST-MWS is that it will analyse cavity resonators and planar waveguide resonators much more effectively (w.r.t. evanescent behaviour) than stripline type resonators, without requiring an excessive amount of processing time. I have not began to investigated changing the local mesh grid to see what affect this has on the stripline structure's analysis - I've been too busy with other matters.
Has anyone had any success with these type of tools to effectively/successfully analyse microstrip resonators, and their evanescent behaviour?

Before talking about the effectiveness of any simulation tool, can you define "evanescent behavior"? One can say everything other than the propagation/resonance of fundamental mode involve some coupling effect due to evanescent mechanism. If all of these "full-wave" tools are no good in simulating such coupling, how to explain the good/satisfying results obtained for other problems such as antenna and filters...?