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Proceedings of XIth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic Acoustic Wave Theory

Date 11-13 Oct. 2006

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  • [Front cover]

    Publication Year: 2006, Page(s): C1
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  • Proceedings of XIth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory

    Publication Year: 2006, Page(s): 1
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  • Organized and sponsored by

    Publication Year: 2006, Page(s): 2
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  • Copyright page

    Publication Year: 2006, Page(s): 2
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  • DIPED-2006 Committees

    Publication Year: 2006, Page(s): 3
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  • Contents

    Publication Year: 2006, Page(s):5 - 7
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  • Plenary session [Breaker page]

    Publication Year: 2006, Page(s): 9
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  • MAS Based Software for the Solving of Diffraction and SAR Problems on Unbounded Objects

    Publication Year: 2006, Page(s):11 - 16
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1083 KB) | HTML iconHTML

    In this paper software program package (SPP) for study of the wide class of the EM problems based on the method of auxiliary sources (MAS) solver is described. This SPP allows solving 3D diffraction and wave propagation problems, close to the real scenarios. This SPP based on MAS as mutually complementary together with FDTD solver will be implemented into FDTDLab View full abstract»

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  • Recognition of Irregular Waveguide Geometry Using Opposite Directions Technique

    Publication Year: 2006, Page(s):17 - 20
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (138 KB) | HTML iconHTML

    An inverse problem of irregular waveguide shape recognizing with usage of the moving point source inside it, is considered. A combined algorithm is proposed for solving the appropriate direct problem, based on the known cross-section method with applying the opposite directions technique. In combination with the local variations method, this technique most fully uses the information about fixed pa... View full abstract»

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  • The Application of Double - Scale Expansion Method for the Solving of the Wave Equation with Periodic Coefficients

    Publication Year: 2006, Page(s):21 - 24
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (181 KB) | HTML iconHTML

    The propagation of electromagnetic TE waves in the waveguide of arbitrary cross section with space-time periodically modulated filling is considered. The wave equation with periodic coefficients for the potential Hz is solved with help of the double-scale expansion method. The solutions of the wave equation on the transition boundary between the stable and unstable regions are obtained View full abstract»

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  • Reconstructing the Acoustic Pressure Field Using Spheroidal Wave Functions

    Publication Year: 2006, Page(s):25 - 28
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (117 KB) | HTML iconHTML

    A new formulation based on a prolate spheroidal coordinate was proposed to describe acoustic pressure in the acoustic field. The radiated acoustic pressures are obtained by means of an expansion of independent functions based on the prolate spheroidal coordinate system. Then the acoustic pressure in the field can be reconstructed by using some measured acoustic pressure signals in the field. The i... View full abstract»

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  • [Breaker page]

    Publication Year: 2006, Page(s): 29
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  • Inverse Scattering from Bodies with Impedance Boundary

    Publication Year: 2006, Page(s):31 - 34
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (119 KB) | HTML iconHTML

    A plane wave falls onto the body with an impedance boundary. Magnitude of the back-scattered spherical wave is compared with that of the wave scattered from the body of the same shape, having zero impedance. The impedance (in general, variable over the boundary) can be created such that the back scattering will be noticeably smaller than that from the smooth metallic body. This can be made, e. g.,... View full abstract»

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  • The Solution of the Boundary Problem for an Arbitrary Elliptic Operator Satisfying the Radiation Condition

    Publication Year: 2006, Page(s):35 - 38
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (149 KB) | HTML iconHTML

    The scalar problem of oscillation excitation in the cylindrical waveguide, when the contraction of the operator on the cross section perpendicular to waveguide's axis is an arbitrary elliptic operator, and the boundary condition is the condition of the third kind is considered. It's shown, that it's effective to use the method of generalized Fourier-transformation for such a problem, and the requi... View full abstract»

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  • Neural Network Inverse Method for Dielectric Structures by Multifrequency Signals

    Publication Year: 2006, Page(s):39 - 42
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (107 KB) | HTML iconHTML

    Application of neural network ideology for layered dielectric structure inverse problem solution is under consideration. The 3-layered feed-forward with activation function as a sigmoid (S-shaped) was chosen. The real part of reflection coefficient at many frequencies is used as input signal. Levenberg-Marquardt algorithm was used for training of the network. Some results of numerical simulation f... View full abstract»

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  • Comparative Analysis of the Analytical and Numerical Solutions of Transient Wave Propagation Problem

    Publication Year: 2006, Page(s):43 - 46
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (171 KB) | HTML iconHTML

    The nonstationary three-dimensional radiation problem is transformed into the problem for one-dimensional evolutionary equations by means of the construction of modal basis for electromagnetic field with arbitrary time dependence. Transient electromagnetic fields in infinite space filled with inhomogeneous in radial direction transient medium without losses are presented by spherical modes. The ex... View full abstract»

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  • On Interaction Between the E-Polarized Electromagnetic Wave and the CSA-Pre-Fractals

    Publication Year: 2006, Page(s):47 - 50
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (144 KB) | HTML iconHTML

    The scattering problem of the E-polarized electromagnetic wave by pre-fractal system of cylindrical curvilinear strips has been formulated and solved for induced currents densities. The direct numerical method of mechanical quadratures (MQ-method) has been used successfully to find currents densities distribution on the strips in the case of the CSA-fractal's generator View full abstract»

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  • [Breaker page]

    Publication Year: 2006, Page(s): 51
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  • Reconstruction of Longitudinally Inhomogeneous Dielectric in Waveguides via Integral Equation Technique

    Publication Year: 2006, Page(s):53 - 58
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (183 KB) | HTML iconHTML

    In this study, a longitudinally inhomogeneous dielectric material is loaded in a rectangular cross section waveguide and its permittivity variation is reconstructed using integral equation technique. The analysis of propagation through dielectric loaded waveguide is realized via mode matching technique and the obtained scattering parameters are employed as the measurement data, which is required f... View full abstract»

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  • On the Relation between Surface Impedance and Shape of the Perfectly Conducting Objects

    Publication Year: 2006, Page(s):59 - 64
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (183 KB) | HTML iconHTML

    A new, simple and fast method for the solution of electromagnetic scattering problems related to perfectly conducting objects of arbitrary shape is presented. The method is based on the representation of the conducting object in terms of a circular one having higher order impedance boundary condition on its surface. Through the Taylor expansion of the total field on the minimum circle covering the... View full abstract»

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  • One - Dimensional Profile Inversion of a Planar Layer Bounded by an Inhomogeneous Impedance Boundary

    Publication Year: 2006, Page(s):65 - 70
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (244 KB) | HTML iconHTML

    A regularized Newton iterative method is presented for the determination of one-dimensional profile of an inhomogeneous layer located on an inhomogeneous impedance plane. By using the Fourier transformation of field expressions, the problem is first reduced to a system of non-linear operator equations which can be solved through regularized Newton method. Numerical simulations are carried out to t... View full abstract»

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  • Superluminal Tunneling and Negative Group Delay in Layered Bragg Structures

    Publication Year: 2006, Page(s):71 - 73
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (150 KB) | HTML iconHTML

    Bragg structures with distortion of periodicity are considered. Effects of wave scattering are theoretically investigated in wide frequency band. Methods of characteristic matrices and Fourier wave decomposition are used for obtaining frequency and time dependencies of reflected and transmitted wave pulses. Magnitudes and phases of scattered fields are analyzed. Phenomena of anomalous behavior of ... View full abstract»

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  • Bragg Phenomena on Metal Plane with Section of Quasiperiodic Spatial Perturbation of Surface Impedance

    Publication Year: 2006, Page(s):74 - 77
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (158 KB) | HTML iconHTML

    In this paper we consider phenomena of coupling of wave paraxial beam and quasisurface wave at perfectly conducting plane with segment of spatially oscillating surface impedance. Expansion in spatial harmonics that smoothly vary in longitudinal direction is used for presentation of transversal component of magnetic field. System of integral equations for complex amplitudes of spatial harmonics is ... View full abstract»

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  • Experimental and Numerical Study of Electromagnetic Field Influence on Mollusk Neurons

    Publication Year: 2006, Page(s):78 - 83
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (279 KB) | HTML iconHTML

    Influence of EM radiation at 900 MHz on mollusk neuron placed in TEM cell is investigated. TEM cell model for 900 MHz after numerical study is manufactured and validated. Spatial absorption rate and temperature rise is calculated using FDTD method. Performed series of experiments with experimental results are presented and discussed. Results of experimental investigation RF EMF influence on the ne... View full abstract»

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  • [Breaker page]

    Publication Year: 2006, Page(s): 85
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