Mathematical Methods in Electromagnetic Theory, 1996., 6th International Conference on

10-13 Sept. 1996

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  • MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings

    Publication Year: 1996
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    Freely Available from IEEE
  • EM wave scattering from a slightly rough surface of an anisotropic medium

    Publication Year: 1996
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (49 KB)

    Summary form only given. The theoretical analysis of the interaction of EM waves with anisotropic media is interesting for applications such as remote sensing, nondestructive testing and microelectronics. We consider the problem of two media, one gyrotropic and one isotropic, separated by a boundary covered by small-height and gently sloping roughness. The axis of symmetry of the gyrotropic medium... View full abstract»

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  • Mixed potential integral equation methods for multilayered structures

    Publication Year: 1996, Page(s):16 - 27
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1054 KB)

    Electromagnetic fields created in a homogeneous medium by a known distribution of electric current are determined by integral equations involving free space Green's functions. In actual situations, however, current distributions are not known beforehand and must be determined, in such a way that the total fields satisfy the boundary conditions on the conductors. The integral equation technique was... View full abstract»

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  • Numerical method for solving of three-dimensional scattering problems from penetrable body

    Publication Year: 1996
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    Summary form only given. We formulate the method of minimal discrepancies for solving some linear equations with a non-self-adjoint operator and prove the theorem which determines the conditions for the convergence of the iterations to the solution. In particular, this method can be applied to solve integral equations with a dissipative operator. Volume integral equations (singular equations for e... View full abstract»

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  • Geometrical optics in nonstationary media

    Publication Year: 1996
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (70 KB)

    Summary form only given. To establish the basic equations of geometrical optics in inhomogeneous and nonstationary (time-varying) media it is advantageous to combine the three spatial coordinates and the time to four-dimensional space-time coordinates. The restriction to Minkowski coordinates (for a "flat" space-time) is not necessary and would restrict the applications to plane-stratified media. ... View full abstract»

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  • Using active mediums for measuring transformations of the electromagnetic oscillation

    Publication Year: 1996, Page(s):382 - 384
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    The electromagnetic oscillations (e.m.o.) have a wide frequency range: from tenth parts of Hz (the infra-LF oscillations in a plasma of near space) to 1020 Hz (for the /spl gamma/-radiation). The electromagnetic radiation (e.m.r.), whose sources are molecules, atoms and atomic nuclei have a quantum character caused by terminating of energy of the radiating object. A durability of molecule, atom an... View full abstract»

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  • Bilinear interpolation from polar to rectangular point raster for inverse problem solving

    Publication Year: 1996, Page(s):429 - 431
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    The goal of tomographic imaging systems is to provide a visual information from the inside of examined objects. In the main application area of these systems-the medical diagnosis-the examined object is the human body. It is very special object because of its nature. That is why it is very important to get source data for a least time. Another motivation of using the efficient algorithm for the im... View full abstract»

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  • Selection of regularization parameters of inverse problem by computer simulation model

    Publication Year: 1996, Page(s):478 - 480
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    First Page of the Article
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  • Author's index

    Publication Year: 1996, Page(s):533 - 535
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    Freely Available from IEEE
  • Guided-mode extracted integral equations: a new method for CAD of open waveguide circuits

    Publication Year: 1996, Page(s):55 - 58
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    We have found a BEM based on new integral equations for analysis of open waveguide circuits. We call these guided-mode extracted integral equations (GMEIEs). We show the basic idea of GMEIEs and their application to various problems. We discuss the one-port problem under the single-mode condition, go on to look at the corresponding two-port problem, and finish with the two-port problem under two-m... View full abstract»

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  • Gratings composed of helically conducting cylinders

    Publication Year: 1996, Page(s):529 - 532
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    The problem is the diffraction by a grating composed of helically conducting cylinders of radius b with twirl angle Ψ, irradiated by an arbitrarily polarized normally incident plane electromagnetic wave. The helical curves are taken to be right-handed. The grating spacing p is assumed to be less than the wavelength λ. That ensures the absence of lateral spectra. Two classes of gratings ... View full abstract»

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  • Design efficient FFT digital processor for electromagnetic fields

    Publication Year: 1996, Page(s):412 - 415
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    We present a FFT specialized signal processor, which has been designed to perform calculations with digital signals represented by a special one-bit code called the delta code. Therefore, to perform large word length multiplication is not necessary. Sufficient benefit is derived, because the internal processor's performance is increased, and the hardware becomes much simpler View full abstract»

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  • Advance of mathematical methods of electromagnetic theory in the Karpenko Physico-Mechanical Institute

    Publication Year: 1996, Page(s):46 - 53
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    One of the main trends of scientific activity at the Karpenko Physico-Mechanical Institute is the investigation of the fine structure of physical fields and signals and the development of the theory and methods for their analysis. Concerning the theory of electromagnetic fields, such investigations cover the diffraction problems for harmonics in time radiation as well as the probabilistic analysis... View full abstract»

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  • Symmetrical excitation of spherical segment by impulse dipole

    Publication Year: 1996, Page(s):244 - 247
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    The problem of electromagnetic field excitation near conducting bodies is of great importance for many applications such as high accuracy radiolocation. In the present paper the problem of electromagnetic impulse scattering by an ideal conducting spherical segment is considered. The excitation impulse is produced by an electrical dipole placed on the symmetry axis of the spherical segment. In the ... View full abstract»

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  • Synthesis of the surface of reflector antenna for a given power pattern

    Publication Year: 1996, Page(s):525 - 528
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    Several problems of synthesis of reflector antennas for a given power pattern are considered. The antenna consists of a cylindrical reflector and radiation source. The problems are solved in the approximation of induced currents. Falling on the reflector, a nonuniform plane wave is supposed to be known in the first problem. The reflector surface is synthesized here. It produces an electromagnetic ... View full abstract»

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  • Spectral approach to filter synthesis in waveguide and quasi optical structures

    Publication Year: 1996, Page(s):147 - 150
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The traditional problems of filtering acquire, in the millimeter (mm) wave range, a number of peculiarities, consisting first of all in increasing requirements on the accuracy of design and manufacturing components. This work describes the spectral synthesis, strong analysis and theoretical investigation of band-pass (BPF) and band-stop filters (BSF) in waveguides and periodic grating angular (BPF... View full abstract»

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  • The generalization of Sommerfeld problem about plane wave diffraction on edge of semiplane

    Publication Year: 1996, Page(s):327 - 330
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    The screen of type of infinitely thin semiplane is aligned with plane of dimensionless Decart system of co-ordinate. The diffraction of double-dimension (the dependence on z is absent) plane wave with the electricity vector E-polarization which is parallel to screen is considered. The Sommerfeld boundary conditions in the screen plane are given View full abstract»

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  • Propagation of ultra-short optical pulses in nonlinear optical fibers: an analysis by the beam propagation method

    Publication Year: 1996, Page(s):408 - 411
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    The beam propagation method has been applied to determine the behavior of ultra-short optical pulses in lossless and lossy guides. The method can be applied for arbitrary shapes of initial pulses. The computations were carried out for rectangular pulses and a pair of solitons View full abstract»

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  • A resonance technique for the calculation of guided modes in nonlinear optics (Planar and cylindrical geometry)

    Publication Year: 1996, Page(s):32 - 45
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    A summary of the research work carried out in our Laboratory, concerning the analysis of nonlinear optical waves guided by complicated planar/cylindrical structures, is reported here. The following configurations are chosen as representative examples: a) a scheme of successive non-Kerr nonlinear planar layers and b) a fiber waveguide consisting of successive nonlinear cylindrical layers. The metho... View full abstract»

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  • A transfer-matrix formalism for the periodic ferromagnetic media

    Publication Year: 1996, Page(s):500 - 502
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    In this paper the infinite ferromagnetic semiconductor media that is situated inside the external longitudinal periodic magnetic field is being considered. The mathematical model for incident of propagation of the harmonic electromagnetic waves across this system is considered by the transfer-matrix method. In this paper either it is shown that this model is analogous to the model of the mechanica... View full abstract»

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  • The EM oscillation transformation in vision system

    Publication Year: 1996, Page(s):241 - 243
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    The author discusses the problem of exploration of light transformation effects in the vision system. The structure and performance of visual apparatus are explored and the structure and main characteristics of the visual apparatus as a transformer of EM oscillation of optical diapason are described View full abstract»

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  • Synthesis of the multibeams reflector antenna directivity patterns on the given magnitude

    Publication Year: 1996, Page(s):521 - 524
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The problem of synthesis of the given shape contoured directivity pattern of a spacecraft hybrid antenna with the purpose of uniform “illumination” of the some territorial zone is considered. The variational formulation of the synthesis problem according to the given magnitude pattern is used. The mean-square deviation of given and synthesized magnitudes is chosen as an optimization cr... View full abstract»

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  • The resonance on small non-homogeneity in the waveguide

    Publication Year: 1996, Page(s):369 - 372
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    The solution of the initial-boundary value problem for the wave equation depending on the small parameter ε, with the right-hand side which is periodic in time with frequency ω, is researched View full abstract»

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  • The matrix theory of non uniform waveguide structures excitation

    Publication Year: 1996, Page(s):187 - 190
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    The present paper suggests a new matrix-electrodynamics method, which is based on the selection among the direct and backward waves of a more narrow class of waves, marked in correspondence with the location of excitation sources relative to the region being considered. A non-uniform waveguide structure (WS) means any fast or slow change of the form or size of its cross section, parameters of diel... View full abstract»

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  • Construction and application of orthogonal polynomials in kinetics of quasi-particles

    Publication Year: 1996, Page(s):61 - 64
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    To determine macroscopic hydrodynamic quantities and kinetic coefficients in different media on the basis of the kinetic theory of particles (quasiparticles), one must know the solution of the kinetic equation for the distribution function. In the kinetic theory of monatomic gases, a set of polynomials is presented by the classical Sonin-Laguerre polynomials. Here, we apply a similar method of cal... View full abstract»

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