Numéro |
J. Phys. III France
Volume 7, Numéro 3, March 1997
|
|
---|---|---|
Page(s) | 619 - 630 | |
DOI | https://doi.org/10.1051/jp3:1997146 |
J. Phys. III France 7 (1997) 619-630
Green Dyadics in Composite Chiral-Ferrite Medium by Cylindrical Vector Wave Functions
Dajun Cheng1 and Wei Ren21 Wave Scattering and Remote Sensing Center, Department of Electronic Engineering, Fudan University, Shangai 200433, People's Republic of China
2 Department of Computer Science and Communication Engineering, Kyushu University 36, Fukuoka 812, Japan
(Received 24 October 1996, accepted 5 December 1996)
Abstract
Composite chiral-ferrite medium, which is a generalization of the well-studied chiral medium, has potential application in
chirality management. In the present investigation, based on the concept of spectrl eigenwaves, eigenfunction expansion of
the Green dyadics in an unbounded composite chiral-ferrite medium is developed in the forms of the cylindrical vector wave
functions. The formulations are considerably simplified by analytically evaluating the integrals with respect to the spectral
longitudinal and radial wevenumbers, respectively. The analysis indicates that the solutions of the source-incorporated Maxwell's
equations for a homogeneous composite chiral-ferrite medium, which can be represented in sum-integral forms of the cylindrical
vector wave functions, are composed of two (or four) eigenwaves travelling with different wavenumbers. Each of these eigenwaves
is a superposition of two transverse waves and a longitudinal wave. The Green dyadics of planarly and cylindrically multilayered
structures consisting of composite chiral-ferrite media can be straightforwardly obtained by applying the method of scattering
superposition and appropriate boundary conditions, respectively. The present formulations, which can be theoretically verified
by comparing their special forms with the already existed results, provide fundamental basis to analyze the physical phenomena
of the composite chiral-ferrite media.
© Les Editions de Physique 1997