An Application of the Geometrical Theory of Diffraction to the Scattering of Radio Waves by Irregular Terrain
An Application of the Geometrical Theory of Diffraction to the Scattering of Radio Waves by Irregular Terrain

Author: R. H. Ott

Publisher:

Published: 1968

Total Pages: 80

ISBN-13:

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In this report, a method is developed for the quantitative evaluation of the effects of large irregularities or obstacles on the propagation of a radio wave. The fundamental tool used is Keller's "geometrical theory of diffraction." In contrast to previous methods for treating this problem, the one proposed here is not limited by 1) the type of terrain, 2) the polarization of the transmitting antenna, 3) the radiation pattern of the antenna, and 4) the frequency of the antenna (provided ka>̲ 5.0, where a is the characteristic dimension of the diffracting obstacle). A numerical example showing the antenna pattern behind a hemispherical hill illustrates the application of the theory.

Monthly Catalog, United States Public Documents
Monthly Catalog, United States Public Documents

Author: United States. Superintendent of Documents

Publisher:

Published: 1968

Total Pages: 1716

ISBN-13:

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February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Electromagnetic Propagation and Waveguides in Photonics and Microwave Engineering
Electromagnetic Propagation and Waveguides in Photonics and Microwave Engineering

Author: Patrick Steglich

Publisher: BoD – Books on Demand

Published: 2020-10-21

Total Pages: 194

ISBN-13: 1839681888

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Optical and microwave waveguides have attracted much research interest in both science and industry. The number of potential applications for their use is growing rapidly. This book examines recent advances in the broad field of waveguide technology. It covers current progress and latest breakthroughs in emergent applications in photonics and microwave engineering. The book includes ten contributions on recent developments in waveguide technologies including theory, simulation, and fabrication of novel waveguide concepts as well as reviews on recent advances.