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

Kusiek, Adam; Lech, Rafał; Mazur, J.

doi:10.2528/pier12102507

Cited by 10 publications

(4 citation statements)

References 32 publications

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“…In (6), CW , where is the first-kind Hankel function of integer order m, whereas represents the th cylinder.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…Such field contributions are expanded into cylindrical waves as well by means of the same expansion coefficients used in (6). In particular, to express the fields and , the flat interface in is taken into account evaluating the reflection and transmission of each elementary plane wave constituting the Fourier spectrum of the cylindrical function CW , employed in (6) to expand the scattered field. In particular, this is accomplished using as an alternative expression of the cylindrical waves CW the plane-wave spectrum [21], as follows: CW…”

Section: Theoretical Analysismentioning

confidence: 99%

“…In the literature, a scattering solution is mainly developed with a target placed in a semi-infinite medium or inside a layer. A hybrid technique employing mode-matching method and finite-difference frequency-domain technique is developed in [4]- [6] to analyze scattering by cylindrical objects. In [7]- [11], cylinders are buried in a single layer between two half-spaces.…”

Section: Introductionmentioning

confidence: 99%

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Scattering by Conducting Cylinders Below a Dielectric Layer With a Fast Noniterative Approach

Ponti

Vellucci

2015

IEEE Trans. Microwave Theory Techn.

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A spectral-domain technique to solve the scattering by perfectly conducting cylinders placed below a dielectric layer is presented. Propagation fields are expressed in an analytic form, in the frame of the cylindrical wave approach. The fields scattered by the buried objects are decomposed into cylindrical waves, which are, in turn, represented by plane-wave spectra. Due to the interaction with a layered layout, the scattered fields experience multiple infinite reflections at the boundaries of the layer. Using suitable reflection and transmission coefficients inside the plane-wave spectra, the interaction with such a layered geometry can be solved with a single-reflection approach. Multiple reflections are collected by a set of two scattered fields, i.e., an upward-propagating field, excited by the scatterers and transmitted up to the top medium, and a down-propagating one, which from the top medium reaches the scatterers after transmission through the layer. Therefore, the analytical theory is developed in a very compact way and can be solved through a fast and efficient numerical implementation. Numerical results are evaluated in an accurate way and validated by comparisons with results obtained with a multiple-reflection approach. The scattered field can be evaluated in any point of the domain, in the far-field as well as the near-field region. Two-dimensional maps displaying the magnitude of the total scattered field are reported, showing examples of applications of the technique.

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“…In (6), CW , where is the first-kind Hankel function of integer order m, whereas represents the th cylinder.…”

Section: Theoretical Analysismentioning

confidence: 99%

Section: Theoretical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Scattering by Conducting Cylinders Below a Dielectric Layer With a Fast Noniterative Approach

Ponti

Vellucci

2015

IEEE Trans. Microwave Theory Techn.

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“…The trivial properties of reflection and transmission of electromagnetic waves under periodic structures irradiation are well known, being used in a wide range of applications [1][2][3][4]. In case of periodicity perturbation, the Bragg reflection becomes more complicated and gains great practical value [5].…”

Section: Introductionmentioning

confidence: 99%

Wave Packets Scattered by Non-Periodic Bragg-Type Layered Structures

Borulko¹,

Drobakhin²,

Сидоров³

2013

PIER B

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Abstract-The time delay, space shift and widening of wave packet transmitted and reflected by structures with Bragg mirrors have been investigated. The specific structures such as Bragg mirrors, resonators, and structures with chirp variation of thickness of the "period" have been considered. The calculation has been carried out under the conditions that carrier frequency, and incidence angle is in the vicinity of the Bragg resonance. Integral (mass center) and differential (group) estimates of the delay time and space shift have been compared. The conditions for the appearance of anomalous (negative) mass center delay or mass center shift (Goos-Hänchen shift) of the reflected wave packet have been determined. The shape transformations of the wave packet illuminating periodic and quasiperiodic apodized Bragg reflectors have been under consideration. Spatial apodization of permittivity contrast yields much smaller shape deformation of the transmitted wave packet upon incidence at angles and carrier frequency near the edges of reflection band, as well in Bragg reflection band, in comparison with phenomena in similar periodic structures. The values of group delay for layered structures with a small chirp variation of optical (electrical) thickness of the period along longitudinal coordinates have been experimentally obtained in microwave range.

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Electromagnetic plane wave scattering from a cylindrical object with an arbitrary cross section using a hybrid technique

Kowalczyk

Lech

Warecka

et al. 2018

Journal of Electromagnetic Waves and Applications

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

Cited by 10 publications

References 32 publications

Scattering by Conducting Cylinders Below a Dielectric Layer With a Fast Noniterative Approach

Scattering by Conducting Cylinders Below a Dielectric Layer With a Fast Noniterative Approach

Wave Packets Scattered by Non-Periodic Bragg-Type Layered Structures

Electromagnetic plane wave scattering from a cylindrical object with an arbitrary cross section using a hybrid technique

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