Abstract
A ray-tracing computer model, combining the effects of the curvature of the Earth, of the radiation patterns of the antennas, as well as those of the reflection at the Earth’s surface, has been developed in order to simulate multipath effects on the relationship between cross-polarization discrimination (xpd)and co-polar attenuation (cpa)values occurring in frequency-reuse line-of-sight microwave links. Measured refractive-index vertical profiles have been used as input data to this model, in order to study the dependence of the parameters of the law relatingxpdandcpaon the characteristics of the link. Based on the observed dependence, experimental values for the parameters of this law, available in the literature, have then been analyzed.
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