|REGONESI ERIC||Cycle: XXXIII |
Tutor: RIVA CARLO GIUSEPPE
Advisor: LUINI LORENZO Major Research topic
:A comprehensive model for the investigation and prediction of depolarization along high frequency Earth-space linksAbstract:
Satellite communication (SatCom) systems are progressively shifting towards the use of frequencies higher than 30 GHz. At these frequencies, Earth-space links are subject to strong detrimental effects induced by the troposphere, including depolarization due to ice and water particles. In this context, the depolarization models available in the literature (e.g. the one currently adopted by the ITU-R) do not fully characterize the large variability observed in beacon derived depolarization measurements. Furthermore, there is a lack of physically based models, which consider the joint effects of rain, clouds and the melting layer, which are globally applicable and adaptable to different scenarios.
This research activity aims at building a comprehensive model for the depolarization induced by the troposphere on electromagnetic waves (EHF range) along Earth-space links. Starting from a realistic meteorological environment, the depolarizing effects due to rain drops, ice particles and melting particles will be studied and implemented in the model, which will thus allow to isolate and integrate the effects of each constituent, with the final goal of providing a reliable tool contributing to the design of near future high frequency SatCom systems. To this aim, the model will be validated using as reference depolarization data coming from the ITALSAT and ALPHASAT propagation experiments, and the results will be compared with those obtained from models available in the literature.