In this work, antenna patterns of the array configurations are studied and compared for dipole, slot and patch elements. The element radiations are simulated with the HFSS (High Frequency Structure Simulator). To make un-biased polarimetric measurements, the radar systems need to be calibrated for each beam steering directions. Two possible calibration procedures: i) projection/correction matrix method and ii) polarimetric variable calibration are examined. The correction matrix method adjusts amplitude and phase of each element for the H and V polarization, whereas the polarimetric variable calibration corrects the polarimetric estimates such as ZDR and ρhv.