Finite Element Computation of Complex Resonant Frequencies for Penetrable Axisymmetric Bodies
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Authors
Moser, P.J.
Űberall, H.
Morgan, M.A.
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1989
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Abstract
A finite element based electromagnetic scattering program is used to identify
the complex natural resonances for axisymmetric dielectric bodies. These resonances are
found by way of a complex frequency s-plane search for the zeroes of the determinant of
the global system matrix which represents the scattering solution. Examination of the
behavior of the elements .of this matrix also reveals the mode type, either TE or TM, the
meridional order and the azimuth index. Computational examples are presented for the
cases of a penetrable sphere, a 2:1 prolate spheroid and a 1:1 finite right circular cylinder,
each composed of high density lossless dielectric.
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Article
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Electrical and Computer Engineering
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This work was supported by the Office of Naval Research under control N00014-86-K-0523.
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Journal of Electromagnetic Waves and Applications, Vol. 3, No.2, 129-142,1989