April 1969 | NTIA Technical Report ERL 109-ITS 77
Terrain Effects on Antenna Radiation Patterns Part II: Analysis of Scattered Fields
R. H. Ott; J. E. Herman
Abstract: A numerical method for calculating the scattering and diffraction at an antenna site to be used in a sky-wave communication link is derived. The method of physical optics is used to treat the scattering by the terrain surrounding the antenna site. The terrain is represented by a Gaussian transformation and, as an intermediate step, the reflection points on the terrain are found. The methid is compared with the approach based on the numerical solution of an integral equation and good agreement is obtained. It appears that the method will be applicable over the HF range for the majority of terrain encountered in practice.
Keywords: terrain; diffraction; scattering function
Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.