双极化频率复用信道交叉极化效应的预测方法

Method of Predicting Cross Polarization Discrimination of a Radio Relay Link Using Two Orthogonal Polarizations

在深入分析微波视距通信信道特性及其传播机理的基础上，研究和提出了一种预测降雨引起的交叉极化效应的理论方法．其特点是综合考虑了差分衰减与差分相移对电波传播的影响，用同极化衰减（ＣＰＡ）来表示交叉极化分辨率（ＸＰＤ）的变化，并将预测结果与实验数据进行了比较，两者吻合较好．

Based on deeply analyzing the propeties and propagation mechanisms of microwave′s line of sight channal, this paper researches and proposes the theoretical method of predicting of rain induced cross polarizatoin effect,whose key points are to consider simultaneously the influence of differential attenuation and differential phase shift of the characteristic polarizations, and to characterize cross polarization discrimination with co polarization attenuation.Finally comparison with the measured values in experimental link, which showing good agreement between calculation and experiment.