¹School of technology, Zhejiang Agricultural & Forestry University, Lin’an, China
²School of technology, Beijing Forestry University, Bei jing, China
³School of technology, Zhejiang Agricultural & Forestry University, Lin’an, China

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Abstract—The diffraction fields and the shadow of standing tree diffraction are solved by using polygons to approximately take the place and approximation as approximate substitutes of for the circle. The algorithm model of ray path tracing is computed by tracing the ray path on standing tree. Considering electromagnetic wave propagation, which a physical model of diffraction for a forest is constructed. The mathematical model of diffraction is presented using the uniform geometrical theory of diffraction(UTD). Moreover, the expression for diffraction loss is derived. The results were then applied to the fir. Simulation and analysis show the validity of the proposed model.

Index Terms—UTD, standing tree, algorithm of diffraction

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Cite: Yun-Jie Xu, Wen-Bin Li, and Shu-Dong Xiu, "Algorithm of diffraction for standing tree based on the uniform geometrical theory of diffraction," Journal of Software vol. 7, no. 6, pp. 1351-1357, 2012.