Terrain effects on antenna radiation patterns
Subtitle: Part II : Analysis of scattered fields
By: R.H. Ott and J.E. Herman
Contributors: Herman, J. E.; United States. Environmental Science Services Administration. Research Laboratories; United States. Department of Commerce; United States. Environmental Science Services Administration
Series: ESSA technical report -- ERL 109-ITS 77
Publisher: Institute for Telecommunication Sciences, Environmental Science Services Administration, U.S. Dept. of Commerce; For sale by the Supt. of Docs.
Published: 1969
Place of publication: Boulder, Colo; Washington, D.C
Language: eng
Number of pages: 88
Subjects: Antenna radiation patterns; Electromagnetic waves; Scattering; Antennas (Electronics); Radiation; Diffraction patterns
Other titles: Analysis of scattered fields
Description: 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 method 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.
Notes: "April 1969."

"This report was sponsored by the Department of the Navy, Naval Electronics Systems Command (NESC) Washington, D.C. 20360, contract no. 8-0637."

Includes bibliographical references (p. 59-60).