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Empirical Study on the Prediction of Rain Attenuation in EHF(44 GHz) Band  

Park Yong-Ho (Department of Radio Science and Engineering, Chungnam National University)
Lee Joo-Hwan (Digital Broadcasting Research Division, ETRI)
Pack Jeong-Ki (Department of Radio Science and Engineerig, Chungnam National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.8, 2005 , pp. 848-854 More about this Journal
Abstract
The attenuation due to rain has been recognized as one of the major causes of unavailability of radio communication systems operating above about 10 GHz. To design radio links for telecommunications and to evaluate attenuation due to rainfall, it is important to have a good prediction model for rain attenuation such as a model for drop-size distribution of rainfall(DSD), a theoretical model for specific rain attenuation, and an empirical model fur effective path length through rain. In this paper, the extended generalized gamma distribution for drop-size distribution, based on the measurements in Chnugnam National University, is proposed as a new DSD model, and predicted specific attenuation characteristics using proposed DSD model and rain attenuation values in the 44 GHz satellite path using ITU-R effective path length model, are analysed. The predicted attenuation levels are also compared. It is found that an accurate prediction method for DSD is very important to reduce the prediction error in the local satellite path.
Keywords
Rain; Distribution; Attenuation; DSD;
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