if use from ie3d software:
Please enable pattern calculation on SIMUATION SETUP and perform pattern calculation on displaying current. Please use PATTERNVIEW to visualize the pattern data. Which one is co-pol and which one is cross-pol are defined by you. You decide which ones and you can visualize them on PATTERNVIEW.
HFSS provides a wide selection relative to polarization (study online help for details). You might want to look at Stutzman's book on this subject for exhaustive details.