An Analytic study for effect of Antenna Height on Line-of-Sight VHF/UHF Communications Coverage Distance applied to Baghdad City

Abstract

A radio system conveys information from transmitter to the receiver. The information can be sent by any antenna that transforms the RF signal into an electromagnetic wave through free space medium for electromagnetic wave propagation. Long-distance data communication has been higher in effect through wireless networks. Generally, VHF and UHF radio frequencies are termed as line-of-sight (LOS). In point of fact, the considered horizon for visual LOS is not the identical as the horizon for radio wave propagation as geographic obstacles and the earth curvature limits LOS transmission. This research provides an overview, study, analysis, and implementing simulations with single-antenna and two-antenna systems using MATLAB programming language related to antenna height effect on determining the distance range that can be expected in a radio line of sight data link. Also, the effect of weather and earth terrain changes effects on coverage distance is also taken in consideration when doing analysis. The city of Baghdad (from many locations in the world) is assumed as the place where the research ideas are applied.