Open AccessDepolarisation studies of single trees at 20 GHz
Author(s) -
Caldeirinha Rafael F.S.,
AlNuaimi Miqdad O.
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2016.0574
Subject(s) - signal (programming language) , tree (set theory) , depolarization , radio propagation , trunk , physics , computer science , telecommunications , mathematics , botany , biology , mathematical analysis , programming language , endocrinology
This study addresses the characterisation of the polarisation states of the re‐radiated signal from a natural tree performed in the vicinity around deep signal fades, at 20 GHz. The polarisation pattern method has been used to investigate the effects of depolarisation and to further characterise the changes in the polarisation state of the re‐radiated signal occurring as a result of the currents induced in the trunk, branches and leaves, which are significantly influenced by the complex permittivities of the various materials making up the tree. Results presented in this study will explain the signal behaviour observed in the various regions around the tree. The results also show that depolarisation, in addition to absorption and scatter, is an important factor formulating accurate models for propagation in vegetation.