MICROWAVE DIELECTRIC SPECTRUM OF VEGETATION .1. EXPERIMENTAL-OBSERVATIONS
MICROWAVE DIELECTRIC SPECTRUM OF VEGETATION .1. EXPERIMENTAL-OBSERVATIONS
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DOI：
10.1109/tgrs.1987.289832
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发表时间：
1987-09-01
影响因子：
8.2
通讯作者：
ULABY, FT
中科院分区：
文献类型：
--
作者：
ELRAYES, MA;ULABY, FT
这是由两部分组成的序列中的第一篇论文，评估植被材料的微波介电行为作为含水量、微波频率和温度的函数。第一部分介绍了各种类型植被材料（包括叶子、茎和树干）在不同湿度条件下的 0.2 至 20 GHz 介电谱的实验测量。测量结果是使用同轴探针技术获得的，该技术适用于测量厚材料（如树干）和薄材料（如树叶）的介电常数。在第二部分中，实验数据用于指导双色散介电模型的开发，该模型结合了“游离”和“结合”形式的水的介电特性。
This is the first paper in a two-part sequence that evaluates the microwave dielectric behavior of vegetation material as a function of water content, microwave frequency, and temperature. Part I presents experimental measurements of the dielectric spectrum from 0.2 to 20 GHz for various types of vegetation material including leaves, stalks, and trunks at various moisture conditions. The measurements were acquired using a coaxial probe technique suitable for measuring the dielectric constant of both thick materials, such as tree trunks, and thin materials, such as leaves. In Part II, the experimental data are used to guide the development of a dual-dispersion dielectric model that incorporates the dielectric properties of water in both "free" and "bound" forms.