Tropospheric Influence on Ultra-High Frequency (UHF) Radio Waves

Abstract

This research investigates the effects of temperature and relative humidity on UHF signals. A spectrum analyzer was used in measuring UHF signals while a digital thermometer and hygrometer was used in measuring temperature and relative humidity, respectively. From results obtained, relative humidity had no significant effect on measured path loss while a positive correlation coefficient was obtained between temperature and measured path loss. This implies that an increase in temperature will lead to a decrease in received signal strength of UHF signals. Furthermore, a path loss propagation model for Calabar (PL = 37.920 + 2.796T + 0.290R + ) was obtained using multiple regression analysis and we believe that the obtained result will be useful to radio engineers for UHF signal propagation in the study terrain.

Analytical Comparison of Path Loss Models for Radio Wave Propagation over Yenagoa–Southern Nigeria

“…Path loss models are an important aspect of radio wave propagation that helps predict the reduction of signal strength over a given transmission distance. This is crucial in designing wireless communication systems for various applications such as cellular communication, satellite communication, radio broadcasting, and more [1][2][3][4][5][6]. In general, radio waves experience various types of losses as they propagate through a medium or along a path such as free space, air, water, or buildings.…”