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Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 4, Issue 3, Pages 388-401, DOI: https://doi.org/10.21307/ijssis-2017-446
License : (CC BY-NC-ND 4.0)
Received Date : 08-July-2011 / Accepted: 16-August-2011 / Published Online: 01-September-2011
This paper presents the study of microwave signal attenuation on oil palm trees at 0.9 GHz, 1.8 GHz and 2.3 GHz frequencies. The main objective is to investigate the characteristics of propagation phenomenon by analysing the received signal strength. The experiments were made at the estate where there are straight line uniform canopies of mature oil palm trees. The measurements were carried out on the same transmission paths with different number of trees and height at trunk, leaves and fruits which obstructing the signal paths. The results have shown that excessive attenuation is due to scattering, depolarisation, fluctuation and absorption. It is strongly aggrees with the previous studies. Further studies on other types of vegetation and environments, and its seasonal differences are important as future research.
 S. Gurung and J. Zhao, “Attenuation of Microwave Signal and Its Impacts on Communication System”, Graduate Project, Department of Electrical Engineering, College of Engineering, University of North Texas, 2011.
 W.H. Hayt and J.A. Buck, “Engineering Electromagnetics”, Sixth Edition, McGraw-Hill Higher Education, pp. 348-365, 2001.
 W.C.Y. Lee, “Mobile Cellular Telecommunications: Analog and Digital Systems”, Second Edition, McGraw-Hill, 1995.
 M.H.C. Dias and M.S. de Assis, “An Empirical Model for Propagation Loss Through Tropical Woodland in Urban Areas at UHF”, IEEE Transactions on Antennas and Propagation, Volume 59, No.1, pp.333-335, January 2011.
 P. Gomez, I. Cuinas, A.V. Alejos, M.G. Sanchez and R.F.S. Caldeirinha, “Shrub-Blown Time Variability in Attenuation and Scattering at Cellular Frequencies”, IET Microwaves, Antennas and Propagation, Volume 4, Iss. 4, pp.526-542, 2010.
 S.K. Agrawal and P. Garg, “Effect of Urban-Site and Vegetation on channel Capacity in Higher Altitude Platform Communication System”, IET Microwaves, Antennas and Propagation, Volume 3, Iss. 4, pp.703-713, 2009.
 S.A. Torrico and R.H. Lang, “A Simplified Analytical Model to Predict the Specific Attenuation of a Tree Canopy”, IEEE Transactions on Vehicular Technology, Volume 56, No. 2, pp. 696-703, March 2007.
 M.S. Al-Basheir, R.M. Shubair and S.M. Sharif, “Measurements and Analysis for Signal Attenuation Through Date Palm Trees at 2.1 GHz Frequency”, Sudan Engineering Society Journal, Volume 52, No. 45, pp. 17-22, January 2006.
 M.H. Hashim and S. Stavrou, “Wind Influence on RadioWaves Propagating Through Vegetation at 1.8 GHz”, IEEE Antennas and Wireless Propagation Letters, Volume 4, pp. 143-146, June 2005.
 E.R Pelet, J.E. Salt and G. Wells, “Effect of Wind on Foliage Obstructed Line-of-Sight Channel at 2.5 GHz”, IEEE Transactions on Broadcasting, Volume 50, No. 3, pp. 224-232, September 2004.
 I.S. Koh, F. Wang and K. Sarabandi, “Estimation of Coherent Field Attenuation Through Dense Foliage Including Multiple Scattering”, IEEE Transactions on Geoscience and Remote Sensing, Volume 41, No. 5, pp. 1132-1135, May 2003.
 I.S. Koh and K. Sarabandi, “Polarimetric Channel Characterization of Foliage for Performance Assessment of GPS Receivers Under Tree Canopies”, IEEE Transactions on Antennas and Propagation, Volume 50, No. 5, pp. 713-726, May 2002.
 G.M. Whitman, F.K. Schwering and M.Y.C. Wu, “Collimated Beam Wave Pulse Propagation and Scattering in Vegetation Using Scalar Transport Theory”, IEEE Transactions on Antennas and Propagation, Volume 55, No. 6, pp. 1599-1612, June 2007.
 I.L. Kosow, “Microwave Theory and Measurements”, Prentice Hall, 1962.
 R.E. Collin, “Antennas and Radio Wave Propagation”, Third Edition, McGraw-Hill Book Company, New York, 1985.
 G. Chattopadhyay, “Sensor Technology at Submillimeter Wavelengths for Space Applications”, International Journal on Smart Sensing and Intelligent Systems, Volume 1, No. 1, pp. 1-20, March 2008.
 K.F. Ssu, W.T. Wang, F.K. Wu and T.T. Wu, “K-Barrier Coverage With a Directional Sensing Model ”, International Journal on Smart Sensing and Intelligent Systems, Volume 2, No. 1, pp. 75-93, March 2009.
 A. Ropponen, M. Linnavuo and R. Sepponen, “LF Indoor Location and Identification System ”, International Journal on Smart Sensing and Intelligent Systems, Volume 2, No. 1, pp. 94-117, March 2009.
 Z.I. Rizman, M.A. Ali, S.S. Rais, A.F. Abidin, Y.K. Ho and M.S. Sulong, “Analysis of Microwave Attenuation through Oil Plam Trees”, Proceeding of Asean Conference on Scientific and Social Science Research, Paper No. 77, June 22-23, 2011, Penang, Malaysia.