Combining Multiple Knife-Edge Diffraction and Ground Reflections for Terrain Path Loss Calculation

This paper presents a new method based on the image theory and multiple knife-edge diffraction for calculating the terrain path loss. As an example, the attenuation of a special double knife-edge problem with ground reflection is calculated. The proposed method can be extended to multiple knife-edge diffraction easily. The mathematical computation involved in this method is less than the other methods which consider the ground reflections as well as multiple knife-edge diffractions. Furthermore, based on the proposed method, some insignificant paths can be omitted to reduce the amount of the computation.