Dyadic Green's function of an ideal hard surface circular waveguide with application to excitation and scattering problems
Article first published online: 22 JUN 2005
Copyright 2005 by the American Geophysical Union.
Volume 40, Issue 3, June 2005
How to Cite
2005), Dyadic Green's function of an ideal hard surface circular waveguide with application to excitation and scattering problems, Radio Sci., 40, RS3014, doi:10.1029/2004RS003167., , , , and (
- Issue published online: 22 JUN 2005
- Article first published online: 22 JUN 2005
- Manuscript Accepted: 11 MAR 2005
- Manuscript Revised: 28 FEB 2005
- Manuscript Received: 1 SEP 2004
- hard surface;
- Green's function;
- TEM waveguide
 Green's function analysis of ideal hard surface circular waveguides is proposed with application to excitation and scattering problems. A decomposition of the hard surface waveguide into perfect electric conductor and perfect magnetic conductor waveguides allows the representation of dyadic Green's function in terms of transverse electric (TE) and transverse magnetic (TM) waveguide modes, respectively. In addition, a term corresponding to a transverse electromagnetic (TEM) mode is included in the representation of the Green's dyadic. The TEM term is extracted in closed form from the eigenmode expansion of TM and TE modes in the zero-cutoff limit. The electric field distribution due to an arbitrarily oriented electric dipole source is illustrated for representative TM, TE, and TEM modes propagating in the ideal hard surface circular waveguide. The derived Green's function is used in the method of moments analysis of an ideal hard surface waveguide excited by a half-wavelength strip dipole antenna. In addition, the scattering of the TEM mode by a thin strip is studied in the ideal hard surface circular waveguide.