impedance matching to an RF antenna
Look at the smith chart given for the matching:



Series 330pF is probobly DC block not matching because reactance is very low.


From 1 to 2 it is L1 = 18 nH. (Shunt)
From 2 to 3 it is L2 = 27 nH. (Series)
From 3 to 4 it is 3pF parasitic capacitance mentioned in datasheet.