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2012 XVIIth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory - (DIPED)

Date 24-27 Sept. 2012

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Displaying Results 1 - 25 of 68
  • [Front cover]

    Publication Year: 2012, Page(s): 1
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  • [Title page]

    Publication Year: 2012, Page(s): 1
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  • Copyright page

    Publication Year: 2012, Page(s): 1
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  • Committees

    Publication Year: 2012, Page(s): 1
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  • Welcome

    Publication Year: 2012, Page(s): 1
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  • Table of contents

    Publication Year: 2012, Page(s):5 - 7
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  • Blank page

    Publication Year: 2012, Page(s): 1
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  • Plenary session

    Publication Year: 2012, Page(s): 1
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  • Blank page

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  • Radar protection of impedance sphere and other nonplanar surfaces

    Publication Year: 2012, Page(s):11 - 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB) | HTML iconHTML

    It is known that the sphere is invisible for the radar if its surface has the unit impedance, similarly as the plane does not reflect the normally falling plane wave. Here the question is investigated which concerns the existence of other impedances which have the same property. Two other values of the complex impedance are obtained, which provide the radar invisibility of the sphere. These values... View full abstract»

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  • About scattered field's singularities and Rayleigh hypothesis

    Publication Year: 2012, Page(s):17 - 22
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (645 KB) | HTML iconHTML

    The new vision on the Rayleigh hypothesis is discussed based on several new results of computer simulations. Possible or actual singularities in the analytic continuation of the scattering problem solutions for the two and tree dimensional Helmholtz equation are studied in order to investigate the Rayleigh hypothesis validity. The procedure uses computer simulations for the solution particular pro... View full abstract»

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  • Asymptotic solution for Bragg couplings of wave beam and two surface waves on nonperiodically inhomogeneous impedance rod

    Publication Year: 2012, Page(s):23 - 26
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (361 KB) | HTML iconHTML

    A rod with nonperiodically oscillated perturbation of surface impedance is considered. The Krylov-Bogoliubov-Mitropolsky asymptotic method is used for solving boundary-value problem describing electromagnetic wave propagation in the open waveguiding structure. Mutual transformations of a wave beam falling onto inhomogeneous impedance rod and two surface waves propagating along this rod are investi... View full abstract»

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  • Validation of loop-star basis function approach to model EM/EMI problems on complicated surface and wire geometries from low to microwave frequencies

    Publication Year: 2012, Page(s):27 - 33
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (587 KB) | HTML iconHTML

    In this work, loop-star basis function approach is applied to overcome low frequency breakdown problem for multiple, complicated and mixed surface and wire geometries placed in free space, over ground plane or over/in layered medium. Specifically, it is extended to considering printed structures from low to microwave frequencies. The developed approach is validated on semi-analytical and measureme... View full abstract»

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  • Blank page

    Publication Year: 2012, Page(s): 1
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  • Complex media

    Publication Year: 2012, Page(s): 1
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  • Blank page

    Publication Year: 2012, Page(s): 1
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  • Apodized quasiperiodic Bragg structures with thin contrast layers

    Publication Year: 2012, Page(s):37 - 40
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB) | HTML iconHTML

    Simply realized constructions of periodic and quasiperiodic structures of apodized Bragg reflectors and resonators with thin contrast layers have been proposed. The results of numerical simulation and measurements for such structures have been obtained. View full abstract»

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  • Investigation of achievable accuracy limit of dielectric layer parameters estimates obtained on basis of reflection coefficient measurements

    Publication Year: 2012, Page(s):41 - 44
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1775 KB) | HTML iconHTML

    Minimum, mean and maximum value of the least achievable variance of dielectric layer parameters estimates are evaluated for typical microwave frequency bands used in practice of nondestructive testing. The values of variance are calculated as Cramér-Rao bounds depending on permittivity and thickness of dielectric layer and parameters of frequency grid. The bounds are compared with result o... View full abstract»

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  • Wideband field compensation

    Publication Year: 2012, Page(s):45 - 48
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (327 KB) | HTML iconHTML

    The compensation method permitting to reduce irradiation of the user's body and to create a weak field area (a dark spot) in the antenna near region for an operation in a wide frequency band is considered. View full abstract»

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  • Wideband compensation with flat reflectors

    Publication Year: 2012, Page(s):49 - 52
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    Compensation structures with one and two flat reflectors are suggested and analyzed. View full abstract»

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  • System of impedance vibrators in free space

    Publication Year: 2012, Page(s):53 - 56
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (374 KB) | HTML iconHTML

    A problem of electromagnetic waves excitation by a system of impedance vibrators in free space is solved by a generalized method of induced electromotive forces (EMF). As an example characteristics of three-element Yagi-Uda antenna for various vibrator lengths and types of the distributed impedance are given. View full abstract»

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  • Interaction of normally incident plane electromagnetic wave with strained dielectric layer

    Publication Year: 2012, Page(s):57 - 60
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (602 KB) | HTML iconHTML

    Reflection of normally incident polarized electromagnetic wave by a strained dielectric layer, transmission of the wave through the layer and changing its polarization state is considered in the paper. Possibilities of application of the obtained results for non-destructive determination of strain-stressed state of dielectric solids with use of electromagnetic methods are discussed. View full abstract»

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  • Antenna synthesis and inverse problems

    Publication Year: 2012, Page(s): 1
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  • Blank page

    Publication Year: 2012, Page(s): 1
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  • The MAS based simulation of plane wave angular incident on two-dimensional dielectric sphere array

    Publication Year: 2012, Page(s):63 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB) | HTML iconHTML

    In this article, the Method of Auxiliary Sources (MAS) is applied for analysis of angular incident of electromagnetic plane wave on two-dimensional dielectric sphere arrays. Homogeneous dielectrics spheres are placed on rectangular grid. To fulfill the Floquet conditions, in the MAS algorithm the lattice sum of electric dipoles is applied as a Green's function. The structures are investigated nume... View full abstract»

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