Some Behavior Features of Dielectric Properties of Water in Birch Wood at a Frequency of 1.41 GHz

Trees have a profound impact on human life that makes their year-round monitoring with dielectric characteristics (DCs) of wood water as controlled parameters of great importance. This article deals with studying some behavior features of DCs of different-type wood water in various phenophases under...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2022, Vol.60, p.1-8
Main Author: Romanov, A. N.
Format: Article
Language:English
Subjects:
Absorption factor
Birch trees
Branches
Containers
dielectric characteristics (DCs)
Dielectric measurement
Dielectric properties
Dielectrics
Electrical properties
Hardwoods
microwave range
Moisture
Moisture effects
Phase composition
phenological phases
Plant tissues
Properties
refraction index
temperature
Temperature measurement
Tissue
tree
Vegetation
Water
Wood
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Summary:Trees have a profound impact on human life that makes their year-round monitoring with dielectric characteristics (DCs) of wood water as controlled parameters of great importance. This article deals with studying some behavior features of DCs of different-type wood water in various phenophases under varying moisture, temperature, and concentrations of dissolved substances. It presents the measurement results of DCs (1.41 GHz) of freshly cut branches of birch sampled from the same tree in different phenophases of 2018-2020. DCs carry the information on the phase composition of water present in plant tissue, volume fractions of bound and free water, concentrations, and types of dissolved substances. For various phenophases, the dependences of refractive ( {n} ) and absorption ( \kappa ) indices on volume fraction of water in wood ( {W} ) for whole branches are approximated by piecewise broken lines with one ( {W} _{{{1}}} ) or two ( {W} _{{{1}}} and {W} _{{{2}}} ) break points. We identify three categories of wood water with different DCs and estimate the dielectric properties of bound and free water in wood tissue in different phenophases using the refractive model. The established seasonal dependences ( {n} , \kappa ) ( {W} , {T} ) and the developed dielectric model make it possible to calculate DCs of wood water.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2022.3157642