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Extension of the dRET model to forests of thin cylinders

Leonor, N. ; Ferreira, D. ; Caldeirinha, Rafael ; Fernandes, T. ; Sanchez , M.

IEEE Transactions on Antennas and Propagation Vol. 63, Nº 9, pp. 4049 - 4056, September, 2015.

ISSN (print): 0018-926X
ISSN (online): 0018-926X

Journal Impact Factor: 2,181 (in 2014)

Digital Object Identifier: 10.1109/TAP.2015.2448752

Abstract
This paper presents a feasibility study on extending the applicability of the discrete RET (dRET) model to the trunk layer of raised canopy forests. The framework herein presented, proposes a method to predict the scattered signal inside and around a formation of cylinders (mimicking thin tree trunks), which is based on the prior knowledge of the cylinder 2D re-radiation pattern as input parameters to the dRET model. The characterization and modeling of the cylinder 2D re-radiation patterns was performed in an anechoic chamber so that frequency dependent effects could be evaluated. The assessment of the proposed method was performed against measurements within a formation of both metallic and dielectric cylinders mimicking thin tree trunks, at micro- and millimeter wave frequencies, i.e., 9.4, 18.8 and 37.6 GHz.