HFSS - S11: Differences between simulation and measurements

Hi guys,

I'm trying to compare a patch antenna S11 measurements with a simulation in HFSS.

Attached you'll find the .hfss and the results obtained during the measurement.

S11 describe the same curve in both plots (measure and simulation) but, magnitudes vary dramatically.
It seems to be an issue of meshing or waveport sizing.

I'll appreciate if anyone can help me.

Regards,
FiTo.-