【摘要】 运用随机介质中波的传播和散射理论,解出了电波经过树叶和树枝时散射场的表达式,然后利用平均场的近似方法,计算出电波经过树冠时传播常数的表达式,建立了树冠中电波传播路径损耗的数学模型。通过实验测量了常见树种的相关参数,并代入该模型进行了计算,计算结果与文献提供的测量值吻合较好。更多还原

【Abstract】 The expression of EM scattering fields of canopy is derived by using the theory of propagation and scattering in the random dielectric. Then the propagation constant of canopy is obtained by the approximation way of mean field. The propagation path loss model is built on the basis of the relationship of propagation constant and attenuation constant. The modeling results by measuring the parameters of some trees are good agreement with that of the literature.更多还原