Combined effects of rain and imperfect antennas on depolarization in microwave propagation

Expressions are given on cross‐polarization resulting from the combined effects of rain and imperfect antenna isolations in satellite‐to‐earth links. The calculations at 4 and 11 GHz frequencies differ from previous work in two ways, namely, that the theory adopts a worst phase relationship between receiver and transmitter antennas in clear weather, and that a more realistic expression is used for the rain extent. Sample results are illustrated on cross polarization versus misalignment angle, clear weather antenna isolations, canting angle, attenuation, and rain rate.