The Impact of Soil Texture on Path Loss Modelling of an FM Signal Using Diffraction Technique


  •   Evans Chinemezu Ashigwuike

  •   Ale Felix

  •   Farouq Eneuma Shaibu


A novel solution to predict path loss of an FM signal using diffraction technique is proposed. Diffraction technique and soil texture impact are used to improve the Friis free-space model to predict the received signal strength and propagation path loss of an FM signal between a transmitter site and receiver site, while studying the impact of soil texture to the FM signal in the case of surface wave propagation. Measurement of signal strengths with an interval of 5KM along two different routes (1 and 2) were taken with a Digital Field Strength Meter (DW-400), in some selected open/rural environments of Kogi State. A solid-state transmitter (BE 20S), with broadcast frequency of 101.5MHz at antenna height of 120m was considered as the transmitting point source. Bluetooth signal strength meter software was used to visualize this impact of soil texture, where different types of soil were considered within the coverage area of the FM radio station, with the application of a Wireless Personal Area Network (WPAN) technology. Measurements taken along the two different routes were compared against predictions made by the modified model of Friis Free Space. The model showed quite large mean path loss prediction errors, and places with poor signal strength for Prime FM Radio Nigeria were revealed. The result shows that an FM signal induces current in the ground over which it passes and it is attenuated as a result of absorption of energy by the soil, depending on the soil type.

Keywords: Propagation path loss; diffraction technique; FM signal; personal area network; soil texture


J. S. Seybold, Introduction to RF Propagation, New York: John Willey & Sons, 2005.

[Murat Torlak, Path Loss, New York: UTD, 2002.

Reinhold Ludwig, Pavel Bretchko, RF Circuit Design-Theory and Applications, New York: Pearson Asia Education Edition, 2001.

Erceg .V, et al, "A Statistical Path Loss Model for Wireless Channel in Suburban Environment," IEEE Journal on Selected Areas in Communication, vol. 17, no. 07, pp. 305 - 311, 1999.

Ahmed Chariyev, Low Tan Jung, Mohamad Naufal B. M. Saad, "Path Loss Simulation in Different Radio Propagation Models with 1.8GHz and 2.6GHz Bands," IEEE Transactions on Antennas and Propagations, vol. 02, no. 07, pp. 36 - 39, 2014.

Sigh, Purnima, "Statistical Path Loss Model," American Journal of Engineering Research, vol. 14, no. 08, pp. 405 - 419, 2015.

V. Gupta, "A Path Loss Model Based on Field Measurement," Information Journal of Recent Trends in Engineering, vol. 01, no. 02, pp. 205 - 211, 2009.

Minoru Inomata, Motoharu Sasaki, Wataru Yamada, Yasushi Takatori, "Effects of Building Shapes on Path Loss up to 37 GHz Band in Street Microcell Environments," IEEE Transactions on Antennas and Propagation, vol. 07, no. 17, pp. 249 - 251, 2017,.

Okorogu V.N, Onyishi D.U, Nwalozie G.C, Utebor N.N, "Empirical Characterization of Propagation Path Loss and Performance Evaluation for Co-Site Urban Environment," Internation Journal of Computer Applications, vol. 70, no. 10, pp. 14 - 20, 2013.

Zhe Geng, Hai Deng, "Wireless Signal Propagation Path Loss Estimation," IEEE Transactions on Antennas and Propagations, vol. 02, no. 04, pp. 953 - 954, 2014.

M. Can Vuran, Agnelo .R Silva, "Communication Through Soil in Wireless Underground Sensor Networks-Theory and Practice," IEEE Transactions on Geoscience and Remote Sensing, vol. 03, no. 12, pp. 309 - 318, 2010.

Vijay K. Garg, Wireless Communications and Networking, New York: Elsevier, 2007.

Pardeep Pathania, Parveen Kumar, Shashi .B Rana, "Performance Evaluation of Different Path Loss Models for Broadcasting Applications," IEEE Journal on Electromagnetic, vol. 04, no. 02, pp. 204-209, 2004.

J.M Tranquilla, B.G Colpitts, "Application of Diffraction Technique in Propagation Path Loss Modelling," IEEE Journal, vol. 03, no. 07, pp. 2-11, 2016.


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How to Cite
Ashigwuike, E., Felix, A. and Shaibu, F. 2019. The Impact of Soil Texture on Path Loss Modelling of an FM Signal Using Diffraction Technique. European Journal of Engineering Research and Science. 4, 4 (Apr. 2019), 56-63. DOI: