Title :
Scattering by open metal obstacles in a circular waveguide: dyadic Green´s function approach
Author :
Klymko, Victor A. ; Eshrah, Islam A. ; Yakovlev, Alexander B. ; Kishk, Ahmed A. ; Glisson, Allen W.
Author_Institution :
Dept. of Electr. Eng., Univ. of Mississippi, University, MS, USA
Abstract :
The problem of scattering from an arbitrarily shaped discontinuity in a circular waveguide is presented. The method of analysis is based on the method of moments (MoM) discretization with the electric dyadic Green´s function obtained for a circular waveguide. In this formulation, the Green´s dyadic is derived for an arbitrarily oriented electric dipole in the eigenmode expansion form normalized to unity power. Examples of scattering by a thin radial strip and an annular ring are considered, and the results of the scattering parameters are compared with those obtained using a finite-difference time-domain (FDTD) commercial software.
Keywords :
Green´s function methods; circular waveguides; eigenvalues and eigenfunctions; electromagnetic wave scattering; finite difference time-domain analysis; method of moments; waveguide discontinuities; waveguide theory; FDTD method; annular ring; arbitrarily shaped discontinuity; circular waveguide; eigenmode expansion; electric dipole; electric dyadic Green function; finite-difference time-domain method; method of moments discretization; open metal obstacles; scattering; scattering parameters; thin radial strip; Electromagnetic scattering; Electromagnetic waveguides; Equations; Green´s function methods; Message-oriented middleware; Scattering parameters; Strips; Surface waves; Tellurium; Waveguide discontinuities;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1330630
