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Radio Wave Propagation in the Amazon Jungle - A Tutorial

DOI: http://dx.doi.org/10.12721/2237-5112.v02n01a07

http://www.rtic.com.br

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Mauro S. Assis1

 

Abstract: This tutorial deals with radio wave propagation in a forest environment. Depending on the relative position of the radio stations, three propagation paths should be considered in the analysis of the problem: (a) Both equipments immersed in the jungle; (b) One radio equipment inside and the other on the ground outside the jungle; (c) A radio link between one equipment located in the forest and the other in a plane or helicopter. The optimum frequency for operation in the jungle and an experimental study aiming to estimate the electrical parameters of vegetation are also addressed. Important applications, such as search and rescue, military and scientific missions are mentioned.

Key words: Radio wave propagation, forest environment, propagation path, lateral wave, optimum frequency, electrical parameters

 

1 Brazilian Committee of URSI. E-mail: msassis@openlink.com.br

 

Literatura Citada

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[9] M.S. Assis and R.C. Pinto Filho, “Measurements of the electrical characteristics of vegetation in a dense jungle”, EuCAP 2010, Barcelona, Spain, April 2010. 

[10] M. S. Assis, M.H.C. Dias and J.C.A. Santos, “Ongoing research and development on antennas in Brazil”, EuCAP 2010, Barcelona, Spain, 2010. 

[11] L.E. Vogler and J.L. Noble, “Curves of ground proximity loss for dipole antenna”, National Bureau of Standards (NBS), Tech. Note 175, 1963. 

[12] Z. Krupka, “The effect of the human body on radiation properties of small-sized communication systems”, IEEE Transactions on Antennas and Propagation, vol. AP-16, n.2, pp. 154-163, May 1966. 

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[14] J.C. Dal Bello, “Propagation of electromagnetic waves in the Amazon region” (in Portuguese), M.Sc Dissertation, Military Institute of Engineering, Rio de Janeiro, Brazil, 1983 

[15] J. C. Dal Bello and M.S. Assis, “Tactical communications in the Amazon region” (in Portuguese), Part 1: Revista Militar de Ciência e Tecnologia, vol. IX, pp. 12-20, No.3, July-September 1992; Part 2: Revista Militar de Ciência e Tecnologia, vol. IX, No.4, pp.7-19, October-December 1992.