Equivalent relation between antennas angular deviations and channel coupling in orthogonal polarization diversity systems

An equivalent relation of channel coupling (CC) is proposed, based on the analysis of CC in two-branch orthogonal polarization antenna diversity systems by applying a network theory framework. This equivalence explains CC from the point of view of antennas, which states that CC is equivalent to each antenna deviating a complex angle from its original position. In particular, if the CC and transmission coefficients are real, the equivalent deviation angles are also real, and the correlation is independent of the deviation angles from the vertical plane; furthermore, if the two deviation angles from the vertical plane are equal, both the correlation and the mean power ratio are independent of the two angles. This equivalent relation bridges CC and antenna angular deviations, and results in more easy understanding of CC.