Source radiation in the presence of smooth convex bodies

Abstract

The problem of radiation from sources in the presence of smooth, convex, impenetrable objects is considered, and a brief survey of various high frequency techniques is presented. A generalization of the geometrical theory of diffraction, and two new techniques based on the spectral domain approach and an asymptotic evaluation of the radiation integral for the surface current, also are discussed. Some numerical results derived from the spectral domain formulas are presented and a comparison with available theoretical and experimental data is included.

High-Frequency Electromagnetic Fields Near a Smooth Convex Surface in the Shadow Region

“…High-frequency electromagnetic interaction between a smooth convex surface (or its close vicinity) and remote regions of space has been a subject of extensive research [1][2][3][4][5][6][7][8][9][10]. This interaction is encountered in two mutually reciprocal processes : radiation of a source located on or near the surface and excitation of a field on or near the surface by an exterior wave.…”

“…It is the purpose of the present paper to extend Fock's theory into the shadow region in a purely deductive manner and without narrowing its original scope in other respects. It should be mentioned in this connection that various extensions of Fock's theory were considered in a number of works [3][4][5][6][7][8][9][10][11][12][13][14][15]. Two of them deserve special attention as the most far-reaching in the context of our paper.…”

Electromagnetic Scattering From Inlets and Plates Mounted on Arbitrary Smooth Surfaces

“…Lee [41] also derived a solution for the coupling problem, but his result does not explicitly identify the effects of surface ray torsion since it is a heuristic modification of Fock's expression for the surface field of a source on a sphere. In addition, Mittra, and Safari-Nairn" [42] arrived at a uniform solution for the radiation problem. They obtained their results from just the cononical problem of the radiation from a source on a circular cylinder; therefore, they could not generalize their results to include torsion surface rays on more general convex bodies.…”