Diffraction of TE waves by a metallic cap located on a dielectric sphere: Ring source excitation outside the sphere

Yazıcı A., Serbest A., Büyükaksoy A.

WAVE MOTION, vol.28, no.3, pp.259-282, 1998 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 3
  • Publication Date: 1998
  • Doi Number: 10.1016/s0165-2125(98)00012-2
  • Journal Name: WAVE MOTION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.259-282
  • Çukurova University Affiliated: Yes

Abstract

Diffraction effects of a metallic cap located on a dielectric sphere on the propagation of high-frequency electromagnetic waves is investigated. The incident wave is supposed to be generated by a ring source located symmetrically with respect to the cap. Relying upon the locality principle of the GTD, the rigorous asymptotic solution is obtained by formulating the boundary-value problem in an abstract space in which the azimuth angle theta varies in the range theta is an element of (-infinity, infinity). The application of an integral transform with kernel Q(v-1/2)(-1)(cos theta), having similar analytical properties with Fourier integral transform, yields a scaler Hilbert problem which can be solved asymptotically for \kr\ much greater than 1 and then, edge and surface diffraction coefficients are obtained. (C) 1998 Elsevier science B.V. All rights reserved.