NDLI: Inaccuracies in numerical calculation of scattering near natural frequencies of penetrable objects

Content Provider	IEEE Xplore Digital Library
Author	Hower, G.L. Olsen, R.G. Earls, J.D. Schneider, J.B.
Copyright Year	1963
Abstract	Calculated scattering from a nonconducting cylindrical ring shows great variability with small changes in the material or geometric parameters within certain ranges of these parameters. The observations are explained by a resonance phenomenon in which the operating frequency is found to lie close to a complex natural frequency of the scattering object. This resonance is a real, observable effect predicted by analytical solutions and not the spurious numerical resonances which have been widely discussed and which one wishes to suppress. Attempts have been made to reproduce near-resonance scattering results using the method of moments and finite-difference-time-domain (FDTD) codes. These have failed despite the use of widely accepted discretization densities. Thus, the existence of such resonances requires additional care when interpreting computed results for scattering from similar nonconducting objects have electric and/or magnetic properties.<>
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	982
Ending Page	986
Page Count	5
File Size	549861
File Format	PDF
ISSN	0018926X
Volume Number	41
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency Scattering parameters Magnetic resonance Moment methods Magnetic properties Polarization Integral equations Message-oriented middleware Permittivity Engine cylinders
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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