A Slope UTD Solution for a Cascade of Multishaped Canonical Objects.

The case of multiple diffraction from a cascade of two dimensional multi-shaped canonical objects such as wedges, knife-edges and cylinders, is investigated. A heuristic slope uniform theory of diffraction (UTD) solution is presented that can give accurate and uniform field predictions at any area point and for any kind of environment. The solution is then compared against measurements taken in an anechoic chamber and a very good agreement is observed. Furthermore, an algorithm for implementing the proposed UTD solution to rural area field predictions is also presented, based on a novel algorithm for optimum fit of canonical shapes to the terrain irregularities. Comparisons between the model and measurements taken in real terrain profile show a very good agreement and uniform field predictions. The importance of the choice of the used canonical object to terrain modeling is also discussed since different diffraction patterns are observed for different combination of the canonical objects. [ABSTRACT FROM AUTHOR]