Rigorous Analysis of Electromagnetic Scattering by Cylindrical Ebg Structures

Jandieri, Vakhtang; Yasumoto, Kiyotoshi; Cho, Young-Ki

doi:10.2528/pier11090903

Cited by 20 publications

(18 citation statements)

References 25 publications

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“…Recently, EBGs and PBGs are of great interest due to their extraordinary properties and potential applications e.g., filters, polarizers, substrates for radiating elements, or optical switches [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. FSSs find also application in polarizers and polarization rotators to change the polarization state of an electromagnetic wave [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…The multilayered FSSs are utilized as an electromagnetic band structure (EBG) in microwave wavelength range or photonic band structure (PBG) in optical range [1,2]. Recently, EBGs and PBGs are of great interest due to their extraordinary properties and potential applications e.g., filters, polarizers, substrates for radiating elements, or optical switches [2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Technique for the Analysis of Scattering From Periodic Structures Composed of Irregular Objects

Kusiek¹,

Lech²,

Mazur³

2013

PIER

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Abstract-In the paper, the analysis of electromagnetic wave scattering from multilayered frequency selective surfaces is presented. The surface is composed of periodically arranged posts with irregular shapes. The multimodal scattering matrix of such structure is derived and the transmission and reflection characteristic for the structure with arbitrary plane wave illumination are calculated. The exact fullwave theory based on the hybrid approach employing mode-matching method and finite-difference frequency-domain (FDFD) technique is applied to develop an efficient theory to analyze such structures. The validity and accuracy of the approach are verified by comparing the results with those obtained from alternative methods and own measurements of manufactured periodic structures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hybrid Technique for the Analysis of Scattering From Periodic Structures Composed of Irregular Objects

Kusiek¹,

Lech²,

Mazur³

2013

PIER

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“…Based upon a multiple reflection procedure, WIP is able to characterize structures of arbitrarily shaped patches deposited on multilayer isotropic/anisotropic dielectrics, making it particularly interesting for the study of frequency selective surfaces [11][12][13][14], EBG structures [15], and substrate integrated waveguides [16,17], in the more general field of periodic and almost periodic structures [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Wip Study of Multiple Metallic Obstacle Scattering

Lucanu

Bogdan²,

Baudrand³

2013

PIER

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Abstract-The Wave Iterative Process is applied and validated for the study of the scattering of a plane wave by a multiple metallic dipole diffraction structure. The case of a single metallic dipole is treated, at first in normal incidence, than arbitrarily placed with respect to the incident wave. A double dipole scattering structure is studied, mutual influence being taken into account. The diffraction system is further enlarged to 5 randomly placed dipoles, the results issued from the WIP study being compared with those given by the Moments Method. Finally, the possibility of taking into account a very large number of dipoles is examined, by introducing an equivalent dipole distribution. The influence of this approximation on the WIP precision is presented.

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“…The fantasy of periodic structures may be seen in antennas, antenna feeds, electromagnetic filters, phase shifters, polarizers, photonic crystals for optical power dividers, multiplexers, switches, photonic band gap structures for solid-state lasers [1][2][3][4][5][6][7][8][9][10], etc. and even in the vacuum electronic devices, such as, linear/particle accelerators [11,12], backward-wave oscillators (BWOs) [13], magnetrons [14], coupledcavity and helix travelling-wave tubes (TWTs) [15][16][17][18][19], cyclotron masers [20,21], gyrotron sources [21][22][23][24] and amplifiers [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39], etc..…”

Section: Introductionmentioning

confidence: 99%

Propagation Characteristics of a Variant of Disc-Loaded Circular Waveguide

Kesari¹,

Keshari²

2012

PIER M

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Abstract-The shaping of dispersion characteristics in a variant of disc-loaded circular waveguide was studied through electromagnetic analysis for assessing the structure for wideband coalescence of the beam-and waveguide-mode dispersion characteristics that entails the wideband gyro-travelling-wave tube (gyro-TWT) performance. In this variant of disc-loaded circular waveguide, the alternate dischole radii were varying, however, the structure was periodic. The structure periodicity coupled with Floquet's theorem and fieldmatching technique resulted into the dispersion relation of the infinitely long structure. A numerical code was developed to solve the dispersion relation, and the dispersion characteristics of the structure were analyzed for the azimuthally symmetric TE-modes. The effects of structure parameters were studied for getting a straight-line portion of the dispersion characteristics over a wide frequency range. The dispersion shaping was projected for typically chosen TE 01 -mode. The results were validated against those obtained for the conventional and un-conventional known structures and those obtained using commercially available simulation tool. The variation of azimuthal electric field intensity over the radial coordinate was also studied to examine the control of structure parameter for maxima-position, where the gyrating electron beam would be positioned for optimum beamwave interaction in a gyro-TWT.

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Rigorous Analysis of Electromagnetic Scattering by Cylindrical Ebg Structures

Cited by 20 publications

References 25 publications

Hybrid Technique for the Analysis of Scattering From Periodic Structures Composed of Irregular Objects

Hybrid Technique for the Analysis of Scattering From Periodic Structures Composed of Irregular Objects

Wip Study of Multiple Metallic Obstacle Scattering

Propagation Characteristics of a Variant of Disc-Loaded Circular Waveguide

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