NDLI: Rigorous coupled-wave-theory analysis of dipole scattering from a three-dimensional, inhomogeneous, spherical dielectric, and permeable system

Content Provider	IEEE Xplore Digital Library
Author	Jarem, J.M.
Copyright Year	1963
Abstract	This paper presents a rigorous coupled-wave-theory analysis (RCWT) of the electromagnetic (EM) radiation, which occurs when a centered electric dipole excites power and energy in a general three-dimensional (3-D) inhomogeneous spherical system. The formulation of this paper consists of a multilayer state-variable (SV) analysis of Maxwell's equations in spherical coordinates (the SV analysis used transverse-to-/spl gamma/ spherical EM field components), as well as a presentation of the EM fields which exist in the interior and exterior regions (which bound the inhomogeneous spherical system). A detailed description of the matrix processing which is involved with finding the final EM fields of the overall system is given. Three numerical examples of the RCWT method are studied. The first example presents EM scattering when a centered dipole radiates through a uniform material shell. In this example, numerical results of the RCWT algorithm are compared with numerical results as obtained by a Bessel-function matching algorithm, and excellent agreement was found between the two methods. The second example presents centered dipole radiation when the spherical system is a dielectric shell, which is inhomogeneous in the (/spl theta/, /spl rho/) directions, and the third example presents centered dipole radiation when the spherical system is inhomogeneous in the (/spl gamma/,/spl theta/,/spl rho/) directions. Several examples and plots of the power diffracted into higher order modes by the inhomogeneity profiles are given. As the thickness of the inhomogeneous dielectric shell is increased, it is observed that, through diffraction, power is increasingly depleted from lower order modes into higher modes, The depletion of power from lower to higher order spherical modes with increasing shell thickness is noted to be very similar to the variation of diffraction-order power efficiency, which is observed when the layer thickness of a planar transmission diffraction grating is increased.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	1193
Ending Page	1203
Page Count	11
File Size	603817
File Format	PDF
ISSN	00189480
Volume Number	45
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Diffraction Electromagnetic scattering Electromagnetic coupling Electromagnetic radiation Nonuniform electric fields Dielectrics Electromagnetic analysis Nonhomogeneous media Maxwell equations Transmission line matrix methods
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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