Characteristics of Diffracted Waves: A Comparison Study for Different Wedge Shapes and Materials

In order to have an effective utilization of the radio wave resources, it is important to estimate propagation path in the urban area. In our previous work, we have examined the diffracted fields by two edges with an arbitrary angle in a horizontal plane. In this paper, we analyze the diffracted fields by one or two wedges and compare the effects that wedge shapes and materials give to the diffracted fields for horizontal and vertical polarized incidence. The numerical calculations are carried out for a wedge and two wedges, which are composed by various inner angles and different materials. We also discuss about the diffracted fields by a building rooftop and consider the effect of parapets added on the both sides of the building rooftop. The numerical results show that for one or two wedges, wedge shapes, materials and incident polarization don't give significant effect to diffracted fields, but the diffracted fields by a building rooftop are changed by the material and incident wave polarization.