Spectral formulation for the solution of full-wave scattering from a conducting wedge tipped with a corrugated cylinder

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Abstract

A spectral mode-matching technique is formulated to solve for the full-wave scattering of a corrugated cylinder-tipped wedge in the presence of an impressed electric or magnetic line source. Asymptotic approximations of large-order Bessel or Henkel functions for a fixed argument were introduced in order to overcome numerical difficulties in their regular series expansions. The corrugations on the conducting cylinder have the shape of annular sectors. The primary objective of this work is to investigate the impact of corrugations on the scattered field in the shadow region of the structure. An optimally designed corrugated cylinder placed at the tip of a conducting wedge can effectively suppress electromagnetic scattering in the shadow region. Obtained numerical results using the proposed approach prove the above concept. These results were validated against numerical data obtained using a nodal finite element method. The aim of this research is to utilize these corrugated tips in horn antenna design for the reduction of side-lobe level and the shaping of the respective E-plane radiation pattern.

Original languageEnglish
Title of host publicationApplication of Mathematics in Technical and Natural Sciences - 3rd International Conference, AMiTaNS'11
Pages106-113
Number of pages8
Volume1404
DOIs
Publication statusPublished - 2011
Event3rd International Conference on Application of Mathematics in Technical and Natural Sciences, AMiTaNS'11 - Albena, Bulgaria
Duration: 20 Jun 201125 Jun 2011

Other

Other3rd International Conference on Application of Mathematics in Technical and Natural Sciences, AMiTaNS'11
CountryBulgaria
CityAlbena
Period20/06/1125/06/11

Keywords

  • corrugated cylindrical surfaces
  • Electromagnetic scattering
  • mode-matching techniques
  • spectral methods

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  • Cite this

    Polycarpou, A. C., & Christou, M. A. (2011). Spectral formulation for the solution of full-wave scattering from a conducting wedge tipped with a corrugated cylinder. In Application of Mathematics in Technical and Natural Sciences - 3rd International Conference, AMiTaNS'11 (Vol. 1404, pp. 106-113) https://doi.org/10.1063/1.3659909