Millimeter wave scattering model for a leaf
作者:
K. Sarabandi,
F. T. Ulaby,
T. B. A. Senior,
期刊:
Radio Science
(WILEY Available online 1990)
卷期:
Volume 25,
issue 1
页码: 9-18
ISSN:0048-6604
年代: 1990
DOI:10.1029/RS025i001p00009
数据来源: WILEY
摘要:
At millimeter wave frequencies a typical leaf is a significant fraction of a wavelength in thickness, and its nonuniform dielectric profile now affects the scattering. To provide a simple and efficient method for predicting the scattering, two types of physical optics approximations are examined. The first approximates the volume polarization current by the current which would exist in an infinite dielectric slab with the same profile, while the second (and simpler) one employs the surface current which, on the infinite slab, produces the known reflected field. It is shown that the first method is superior, and, provided the actual dielectric profile is used, it predicts the scattered field to an accuracy which is adequate for most practical purposes.
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