Experimental Study of Rain Attenuation over Line-of-Sight Link at 19.4 GHz in Tropical Region

摘要

An empirical model for rain attenuation has been developed based on the results of rain attenuation data collected over line-of-sight (LOS) link propagation experiment at 19.4 & 28.75 GHz at Amritsar (Latitude 31° 36 N; Longitude 74° 56 E) and rainfall rate measured using tipping bucket rain gauges. We present here the results of measurements of rain-induced attenuation in the vertically polarized signal propagating at 19.4 GHz over a 2.29 km LOS link during some rain events, which occurred in the monsoon season at Amritsar (India). The total attenuation over the link path measured experimentally has been compared with that obtained using Marshal & Palmer (MP) drop size distribution and Medhurst's theoretical values and ITU-R model. Our measured results are in excellent agreement with the MP prediction.