De-embedding Radome Depolarization from Measurements with a Non-Ideal Circularly Polarized Antenna Source

An approximation method is developed to remove the source antenna’s cross-polarization discrimination (XPD) contribution from the total measured XPD. This modeling is shown to correlate very well on a flat-panel test with a radome’s predicted (ideal-source) XPD. Additionally, a mathematical formulation of the theoretical cross-polarization discrimination (XPD) bounds is presented to validate the proposed method. The measured axial ratio should not exceed these bounds. The measured result is within these bounds and thus this model serves as an additional validation step to both the proposed method and the measured results.