microstrip antenna and mesh with CST

Hi,I'm doing a microstrip antenna(850MHz) with CST but i'm worry that results are not right for the mesh.
For this antenna i'm doing an optimization process for the position of the port(with transient solver).
I have lines per wavelenght=35,lower mesh limit=35,mesh line ratio limit=35.
These values has been increased from (10,10 10) until simulation times were not too greater.
I see that at the end of the optimization the goal of reflection coefficent<10dB at 858MHz is ok.
How can i to know if the mesh is ok and so the patterrns and reflection coefficient are right?
(Simulations have been done for 0-2GHz)
Thanks everybody

I would use the adaptive meshing for the first time and check the S11 responses for each mesh. CST would simulate and automatically detect the right mesh size.

use the adaptative mesh, let the CST MWS choose the best mesh for you, good luck