Modifying the parameters of specific attenuation model for prediction attenuation induced by rain at Ka band in Xi´an, China

A simple and effective method for evaluating the parameters of specific attenuation model induced by rain is presented. The parameters at the frequencies from 20GHz to 50GHz are given using the specific attenuation calculated by equivalent permittivity model under the measured raindrop size distribution and the method presented in this paper, which are more applicable in Xi´an, China. The parameters given in this paper are compared with those recommended by ITU-R. And the results are discussed and analyzed. The method and the parameters are significant for more accurately estimating the attenuation by rain.