Electromagnetic Scattering by a Metallic Spheroid Using Shape Perturbation Method

Kotsis, Aristides D.; Roumeliotis, John A.

doi:10.2528/pier06080202

Cited by 23 publications

(39 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is another motivation for adding the present section. The results obtained in this work for the distribution of the internal field of the open enclosure at resonance can be realized by comparison to that of the corresponding mode of the closed enclosure, which have already been given analytically [8]. For small aperture, the results of both cases are close to each other and a comparison can be made to verify the validity of the solution.…”

Section: Spherical Cavity Modesmentioning

confidence: 54%

“…For this reason the results obtained in this work for the distributions of the internal field of the open cavity at its resonances are compared to those of the corresponding modes of the closed enclosure, which have already been given analytically [8]. It is logic that, for small aperture, the results of both cases are close to each other.…”

Section: Introductionmentioning

confidence: 68%

“…An analytic method known as "shape perturbation" method to calculate the RCS of a conducting spheroid is described in [8]. Another analytic method known as "parabolic equation" to calculate the RCS of large targets is described in [9].…”

Section: Calculation Of the Radar Cross Section Of The Spherical Enclmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Internal Resonance on the Radar Cross Section and Shield Effectiveness of Open Spherical Enclosures

Hussein¹

2007

PIER

View full text Add to dashboard Cite

Abstract-In this paper, the effects of the internal resonances of an open conducting spherical enclosure with circular aperture on its radar cross section (RCS) and shield effectiveness (SE) are studied over a wide frequency band. The sizes of the spherical enclosures investigated in the present work range from electrically small (perimeter is less than the wavelength) to electrically large (perimeter is up to ten times the wavelength). It is shown that for such an enclosure, both the RCS and SE, as functions of frequency, have sharp spikes, minima, or maxima at the resonant frequencies corresponding to the internal modes of the closed conducting sphere. Principal and higher order modes are considered. The effects of the aperture width on the perturbation of the field inside and outside of the spherical enclosure, the near field outside the cavity, the RCS and the SE are presented over a wide range of frequency. It is shown that the sharpness and amplitude of the spikes, minima, or maxima of the RCS and SE are decreased with increasing the aperture width. Also, the resonant frequencies of the enclosed spherical cavity are shifted with increasing the aperture width. For the purpose of verifying the accuracy of the obtained results for the SE of an open spherical enclosure at resonance, the obtained field configurations and distributions inside a spherical enclosure of a small aperture are compared to those of the spherical cavity modes which have already been obtained analytically. Also, some of the results concerning the RCS of a spherical enclosure are compared to other published results.

show abstract

Section: Spherical Cavity Modesmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 68%

See 1 more Smart Citation

Effect of Internal Resonance on the Radar Cross Section and Shield Effectiveness of Open Spherical Enclosures

Hussein¹

2007

PIER

View full text Add to dashboard Cite

show abstract

“…In the past, light scattering from spheroidal nanoparticles was studied using a spheroidal wave expansion [26][27][28][29] or shape perturbation method [30]. However, due to their slow convergence, these methods normally demand high computational resources in order to obtain a reasonable accuracy.…”

Section: Plasmon Mode Structure and Symmetriesmentioning

confidence: 99%

Transformation optics and hidden symmetries

et al. 2014

View full text Add to dashboard Cite

Symmetry plays an important role in physics providing a means of classification and a route to understanding. Here we show that an apparently unsymmetrical structure, in our example an ellipse/spheroid, has a more symmetrical partner with an identical spectrum and through which its electromagnetic properties can be classified and calculated analytically. We use the powerful tool of transformation optics to establish this relationship which has wide application beyond the simple example we give in this paper.

show abstract

“…Before the naissance of radar, the RCS of several typical targets irradiated by a homochromous plane electromagnetic wave in free space has been presented such as a conducting sphere, a coating medium sphere, a coating cylinders and an ellipsoid. The scattering property of complex isolated targets in electromagnetic field have been also researched with the digital method and modern algorithms [19][20][21][22][23][24]. In practice, the isolated target in electromagnetic field is an ideal model, it is always electromagnetic interacting with the bodies around it.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Electromagnetic Complex Scattering for Conductor Target Based on Electromagnetic Images Method

Li¹,

Huang²,

Wang³

2008

PIER

View full text Add to dashboard Cite

Abstract-The general image relations of electromagnetic sources are presented around a conductor sphere. The general transformations of trigonometric functions and the unit vectors between two coordinates depart from a distance are obtained. The second scattering field for a target is derived in detail. The complex scattering field and the complex RCS are gained respectively. Results show that the electromagnetic interaction of the targets must be calculated as the distance between two targets is small. The second scattering field is small to three order in magnitude to its first scattering field as the distance becomes large. The phase shift of the second field is mainly determined by the target size and the observing position and not affected greatly by its surrounding target and the distance apart. The distortion of a pulse wave is mainly induced by the phase shift of the second scattering field from the particles as the wave propagating through the random discrete medium.

show abstract

Electromagnetic Scattering by a Metallic Spheroid Using Shape Perturbation Method

Cited by 23 publications

References 16 publications

Effect of Internal Resonance on the Radar Cross Section and Shield Effectiveness of Open Spherical Enclosures

Effect of Internal Resonance on the Radar Cross Section and Shield Effectiveness of Open Spherical Enclosures

Transformation optics and hidden symmetries

Investigation of Electromagnetic Complex Scattering for Conductor Target Based on Electromagnetic Images Method

Contact Info

Product

Resources

About