Electromagnetic wave scattering from some vegetation samples
Electromagnetic wave scattering from some vegetation samples
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DOI：
10.1109/36.7711
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发表时间：
1988-11
影响因子：
8.2
通讯作者：
M. Karam;A. Fung;Y. Antar
中科院分区：
文献类型：
--
作者：
M. Karam;A. Fung;Y. Antar
对于入射平面波，用广义瑞利-甘斯（GRG）近似估计了薄散射体（盘状和针状）内部的场。这导致散射振幅张量等于通过瑞利近似（偶极子项）获得的具有修改函数。对于有限长的圆柱体，内场由无限长的同一圆柱体的相应场估计。本文用数值方法说明了不同的散射体内场估计方法对圆盘、针形和有限长圆柱体后向散射截面的影响，以及波数和入射角的函数关系。最后，将模型预测结果与实测结果进行了比较。>
For an incident plane wave, the field inside a thin scatterer (disk and needle) is estimated by the generalized Rayleigh-Gans (GRG) approximation. This leads to a scattering amplitude tensor equal to that obtained via the Rayleigh approximation (dipole term) with a modifying function. For a finite-length cylinder the inner field is estimated by the corresponding field for the same cylinder of infinite length. The effects of different approaches in estimating the field inside the scatterer on the backscattering cross section are illustrated numerically for a circular disk, a needle and a finite-length cylinder as a function of the wave number and the incidence angle. Finally, the modeling predictions are compared with measurements. >