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Cross-polarisation discrimination studies of single trees at 20 and 62.4 GHz

Caldeirinha, Rafael ; AL-Nuaimi, M.

IET Microwaves, Antennas and Propagation Vol. 11, Nº 5, pp. 695 - 704, April, 2017.

ISSN (print): 1751-8725
ISSN (online):

Journal Impact Factor: 1,187 (in )

Digital Object Identifier: 10.1049/iet-map.2016.0571

Abstract
This paper addresses the characterisation of cross-polarisation discrimination of re-radiated signals from natural trees performed
in the vicinity around deep signal fades. Results presented in the paper will explain the signal behaviour observed in the various
regions around the tree. This has been addressed in this study through a combination of analytical and experimental modelling
based on thorough examination of the re-radiation functions of single trees and appropriate measurements performed under
controlled environments, at 20 and 62.4 GHz. The identification of three distinct regions of interest in the scatter (re-radiated)
field is discussed in the paper, where it is shown that depolarisation, in addition to absorption and scatter, is an important factor
formulating accurate models for propagation in vegetation media.