Spherical wave expansion of the time-domain free-space Dyadic Green's function

Azizoglu S., Koc S., Buyukdura O.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol.52, no.3, pp.677-683, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 3
  • Publication Date: 2004
  • Doi Number: 10.1109/tap.2004.825494
  • Journal Name: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.677-683
  • Keywords: Dyadic Green's function, spherical wave expansion, time-domain analysis, SHORT-PULSE ANTENNAS, NEAR-FIELD ANALYSIS
  • Middle East Technical University Affiliated: No

Abstract

The importance of expanding Green's functions, particularly free-space Green's functions in terms of orthogonal wave functions is practically self-evident when frequency domain scattering problems are of interest. With the relatively recent and widespread interest in time-domain scattering problems, similar expansions of Green's functions are expected to be useful in the time-domain. In this paper, an expression, expanded in terms of orthogonal spherical vector wave functions, for the time-domain free-space dyadic Green's function is presented and scattering by a perfectly conducting sphere is studied as an application to check numerically the validity and to demonstrate the utility of this expression.