Abstract
A propagation model is presented in this paper for predicting the fleld strength in microcellular environments. According to the Geometrical Theory of Difiraction, the total fleld at a given observation point is calculated by summing the Geometrical Optics contributions and the fleld difiracted by the edges of each structure. The difiraction contributions are here evaluated by means of a Uniform Asymptotic Physical Optics solution to the corresponding canonical problem. Such a solution, expressed in terms of the standard transition function of the Uniform Theory of Difiraction, has resulted to be able to compensate the Geometrical Optics discontinuities at the shadow boundaries. In this framework, the structures are treated as constituted by lossy dielectric materials assumed to be non penetrable. The efiectiveness of the here proposed model has been tested in some typical scenarios by means of comparisons with the Finite Difierence Time Domain method.
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