Abstract: The main of this study is to study effect of rain attenuation during the annual and worst month towards communication link especially in the region where heavy rain is a main factor to signal degeration at high frequencies above 10 GHz. Spectral congestion due to the high demand in satellite communication has enforced the development of the conventional frequency bands. Lower frequency band have shifted to higher frequency band such as microwave frequency in order to provide higher data rates as well as wider bandwidths. However, rain fade has become the major hindrance which could cause severe perturbation towards wireless communication tools and satellite communications. Therefore, in this study, analysis of 1 year rain attenuation measurement was done, in order to observe the relationship between the average worst month statistics with the average annual distribution. The result obtained was found to be large different with the one proposed by ITU, hence for better accuracy, the values of Q 1 and β was modified to be adapted in Malaysia
