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The Effects of Rain Attenuations in Satellite Communication System on C, Ku and Ka Frequency Bands

Authors: *Udo, E.U., Okpeki, U.K. And Essien, U.J.

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This paper presents the effects of rain attenuations on microwave frequency bands of C, Ku and Ka. The atmospheric attenuations such as rain, cloud, oxygen and water vapour have significant effect on the transmitting and receiving signals over satellite communication link, especially in locations prone to rainfall. This paper analyzed the effects of rain attenuation on satellite systems in selected areas in the city of Eket, Akwa Ibom State, Nigeria. The rain fall, cloud and gas data were measured and collected from the Nigerian meteorological agency for a period of six months to determine the frequency bands within the affected locations. MATLAB/Simulink and International telecommunication union radio communication (ITU-R) prediction model was employed to improve the received signals. The results obtained shows that for the exceedance time of 0.05 seconds, the attenuation values recorded during the rainfall at elevation angles of 100, 200, 300 and 400 are 10.16, 13.20, 19.28, 9.73, 12.59, 18.24, 10.46, 13.62, 19.99, 9.48, 12.23, 17.63, 9.15, 11.80, and 16.86 while for the exceedance time of 0.60 seconds, the attenuation values recorded at the same elevation angles are 1.09, 1.50, 2.38, 1.03, 1.42, 2.23, 1.12, 1.56, 2.49, 1.02, 1.37, 1.86, 0.96, 1.30 and 2.02. In conclusion, the effects of atmospheric attenuation that causes poor signal quality in the study area was minimized.

Affiliations: Department of Electrical/Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Nigeria.
Keywords: Microwave Frequency, Rain Attenuation, Satellite Communication, Atmospheric Attenuation, Cloud
Published date: 2023/12/30

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ISSN: 2635-3342 (Print)

ISSN: 2635-3350 (Online)

DOI: In progress

ISI Impact Factor: In progress

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Chemical Engineering Department, Faculty of Engineering, University of Benin, PMB 1154, Ugbowo, Benin City, Edo State, Nigeria.