Prediction of effective transmission loss by hydrometeor scatter through a 3D rain cell model

The presence of precipitation particles in the volume formed by the intersection of the transmitting and receiving antenna beams of two independent communication systems operating at the same microwave frequency is a cause of mutual interference. The 11-14 GHz and 20-30 GHz bands, planned for use both by satellite and ground links appear to be in the worst condition. A 3-dimensional model is presented, for the prediction of the coupling and extra attenuation, having as input parameters the electrical and geometrical data of the links and, as far as concerns the meteorological information, the cumulative distribution of point rain rate P(R). This model is the simplified version of a more sophisticated one and is based on a pencil beam approach. Predictions are then compared with the analogous results coming from radar simulations and experimental measurements