Investigation of cloud attenuation over Bangladesh for microwave communications

摘要

Microwave communications enhance the scope of large bandwidth. On the other hand, cloud, rain and some other environmental issues greatly introduce attenuation in microwave link. As Bangladesh is located in a subtropical region, Cloud causes rampant attenuation in microwave communication. For designing a microwave or satellite link, it is important to consider the effect of cloud attenuation. The dominance of cloud at Ku (12 and 14GHz), Ka (20 and 30GHz) and V (40 and 50GHz) bands are investigated in this paper. The investigation is also based on ITU cloud attenuation model. This paper considers 14 geographical stations to collect raw data of weather for a specific time period (1994-2013). Collected data are used to determine the cloud attenuation for different frequencies of Ku, Ka and V bands. The contour map is also designed for different bands of inaccessibility. The results show that the dominance of cloud attenuation is significantly occurred in the northern part of Bangladesh.