DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)最新文献
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822141
P. Shubitidze, R. Jobava, R. Beria, I. Shamatava, R. Zaridze, D. Karkashadze
A finite difference time domain (FDTD) method in combination with the perfectly matched layer (PML) is used for dispersive media. The FDTD method is derived using the convolution relationship between the current density J and the electric field E. The high accuracy of the FDTD method is confirmed by computing the reflection and transmission coefficients for a one dimensional nonmagnetized plasma slab.
{"title":"Application of FDTD to dispersive media","authors":"P. Shubitidze, R. Jobava, R. Beria, I. Shamatava, R. Zaridze, D. Karkashadze","doi":"10.1109/DIPED.1999.822141","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822141","url":null,"abstract":"A finite difference time domain (FDTD) method in combination with the perfectly matched layer (PML) is used for dispersive media. The FDTD method is derived using the convolution relationship between the current density J and the electric field E. The high accuracy of the FDTD method is confirmed by computing the reflection and transmission coefficients for a one dimensional nonmagnetized plasma slab.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130637748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822125
V. V. Yatsik
For a laterally inhomogeneous dielectric layer, the dispersion equations and laws of the irregular dynamics of the spectra near the Morse critical point (MCP) are reported. This knowledge permits the square-law representation and furnishes the local equations of the time-space evolution of the wave-oscillation fields.
{"title":"Irregular dispersion and evolution equations of a quasi-homogeneous structure","authors":"V. V. Yatsik","doi":"10.1109/DIPED.1999.822125","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822125","url":null,"abstract":"For a laterally inhomogeneous dielectric layer, the dispersion equations and laws of the irregular dynamics of the spectra near the Morse critical point (MCP) are reported. This knowledge permits the square-law representation and furnishes the local equations of the time-space evolution of the wave-oscillation fields.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124180400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822134
N. N. Voitovich, U.B. Dombrovska, J. Jarkowski
The generalized method of eigenoscillations generates the nonselfjoint homogeneous boundary value problems containing a spectral parameter in the boundary conditions. One of the ways for solving such problems is the variational technique. For the body of revolution such a technique is developed by Voitovich (1980) and described by Agranovich and Katsenelenbaum, Sivov, and Voitovich (see WILEY-VCH, Verlag, Berlin, 1999). Here the finite element method is used with a stationary functional of the method, which is applied to an investigation of resonators with impedance walls. The problem for the axially symmetrical harmonics of the closed resonator is considered and the main features of the method are described. The method is illustrated on a test problem for a resonator in the form of a finite circle cylinder with impedance side surfaces and metallic borders.
{"title":"Calculation of eigenvalues of homogeneous problems of generalized eigenoscillation for the body of revolution using the finite element method","authors":"N. N. Voitovich, U.B. Dombrovska, J. Jarkowski","doi":"10.1109/DIPED.1999.822134","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822134","url":null,"abstract":"The generalized method of eigenoscillations generates the nonselfjoint homogeneous boundary value problems containing a spectral parameter in the boundary conditions. One of the ways for solving such problems is the variational technique. For the body of revolution such a technique is developed by Voitovich (1980) and described by Agranovich and Katsenelenbaum, Sivov, and Voitovich (see WILEY-VCH, Verlag, Berlin, 1999). Here the finite element method is used with a stationary functional of the method, which is applied to an investigation of resonators with impedance walls. The problem for the axially symmetrical harmonics of the closed resonator is considered and the main features of the method are described. The method is illustrated on a test problem for a resonator in the form of a finite circle cylinder with impedance side surfaces and metallic borders.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114510810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822128
N. Ryazantseva, V. Yachin
The problem of electromagnetic wave scattering by a double-periodic grating is solved by a new method based on the rigorous volume integro-differential equations. The Galerkin method is applied to reduce these volume integro-differential equations to a set of second-order differential ones with constant coefficients in functionals. Numerical solutions were obtained for the simplest double-periodic magneto-dielectric rectangular-cell grating as an example of a structure with translational symmetry.
{"title":"Analysis of rectangular-cell double-periodic magneto-dielectric gratings","authors":"N. Ryazantseva, V. Yachin","doi":"10.1109/DIPED.1999.822128","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822128","url":null,"abstract":"The problem of electromagnetic wave scattering by a double-periodic grating is solved by a new method based on the rigorous volume integro-differential equations. The Galerkin method is applied to reduce these volume integro-differential equations to a set of second-order differential ones with constant coefficients in functionals. Numerical solutions were obtained for the simplest double-periodic magneto-dielectric rectangular-cell grating as an example of a structure with translational symmetry.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130732213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822145
Z. Nazarchuk, O. Ovsyannikov, T. Senyk
The problem of plane electromagnetic wave diffraction by multielement grating which is embedded in a half-space is considered. A system of singular integral equations is obtained by satisfying the necessary boundary conditions. A system of linear algebraic equation is obtained as a result of applying of special quadratures to the initial integral equations system.
{"title":"Problem of plane electromagnetic wave diffraction by multielement grating embedded in a half-space","authors":"Z. Nazarchuk, O. Ovsyannikov, T. Senyk","doi":"10.1109/DIPED.1999.822145","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822145","url":null,"abstract":"The problem of plane electromagnetic wave diffraction by multielement grating which is embedded in a half-space is considered. A system of singular integral equations is obtained by satisfying the necessary boundary conditions. A system of linear algebraic equation is obtained as a result of applying of special quadratures to the initial integral equations system.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131737368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822135
E. G. Grits'ko, L. Zhuravchak
The quasi-stationary approximation of the process of electromagnetic energy spreading in a halfspace is considered. Conductivity of the medium is a continuous function which is constant everywhere excepting for a finite domain of arbitrary shape. Using the fundamental solution of non-stationary diffusion equation, the projection method and the time marching scheme of the sole initial condition, we construct the system of integral correlations to find the components of electric field strength vector in an arbitrary halfspace point in any moment of time through its components in an inhomogeneity domain.
{"title":"Quasi-stationary approximation of electromagnetic energy spreading in a locally inhomogeneous conductive halfspace","authors":"E. G. Grits'ko, L. Zhuravchak","doi":"10.1109/DIPED.1999.822135","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822135","url":null,"abstract":"The quasi-stationary approximation of the process of electromagnetic energy spreading in a halfspace is considered. Conductivity of the medium is a continuous function which is constant everywhere excepting for a finite domain of arbitrary shape. Using the fundamental solution of non-stationary diffusion equation, the projection method and the time marching scheme of the sole initial condition, we construct the system of integral correlations to find the components of electric field strength vector in an arbitrary halfspace point in any moment of time through its components in an inhomogeneity domain.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133977761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822152
M.V. Kotsyuba
This report deals with the elaboration of general algorithms for constructing discrete analogies of differential boundary-value electromagnetic problems by means of the finite-difference method and the theory of invariant function approximation. The obtained analogies are invariant according to the group of linear transformations of the Cartesian co-ordinate system, conservative and independent from the configuration of boundary and contact surfaces. They are characterized by the prescribed order of accuracy.
{"title":"Applying the invariant approximations to the analysis of electromagnetic fields","authors":"M.V. Kotsyuba","doi":"10.1109/DIPED.1999.822152","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822152","url":null,"abstract":"This report deals with the elaboration of general algorithms for constructing discrete analogies of differential boundary-value electromagnetic problems by means of the finite-difference method and the theory of invariant function approximation. The obtained analogies are invariant according to the group of linear transformations of the Cartesian co-ordinate system, conservative and independent from the configuration of boundary and contact surfaces. They are characterized by the prescribed order of accuracy.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124465499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822156
Y. Yashchyshyn, B. Melnyk
The system of wireless networks design is intended to search for the optimal location of the base stations on the ground or in a building is represented. The system enables one to create, edit and to delete objects (houses, if it is the plan of the district or walls, windows and doors, if it is the plan of a building) with a wide spectrum of parameters (dielectric constant, permeability and conductivity). Besides that, the system permits one to introduce the given parameters of the transmitter and to calculate the complex amplitude of an electromagnetic field taking into account the waves incident, reflected, or transmitted through obstacles and the refracted rays by using the geometrical theory of diffraction. It is also possible to calculate the channel impulse and frequency responses and the average delay time.
{"title":"The system of wireless networks design","authors":"Y. Yashchyshyn, B. Melnyk","doi":"10.1109/DIPED.1999.822156","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822156","url":null,"abstract":"The system of wireless networks design is intended to search for the optimal location of the base stations on the ground or in a building is represented. The system enables one to create, edit and to delete objects (houses, if it is the plan of the district or walls, windows and doors, if it is the plan of a building) with a wide spectrum of parameters (dielectric constant, permeability and conductivity). Besides that, the system permits one to introduce the given parameters of the transmitter and to calculate the complex amplitude of an electromagnetic field taking into account the waves incident, reflected, or transmitted through obstacles and the refracted rays by using the geometrical theory of diffraction. It is also possible to calculate the channel impulse and frequency responses and the average delay time.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130917276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822146
O. Ovsyannikov, Y.V. Kasyanyuk
A new effective approach to solution of the three-dimensional diffraction problem on the basis of a three-dimensional integral equation especially for resonance and short wave ranges is proposed.
提出了一种基于三维积分方程求解三维衍射问题的有效方法，特别是在共振和短波范围内。
{"title":"The numerical method of scalar scattering problem solution","authors":"O. Ovsyannikov, Y.V. Kasyanyuk","doi":"10.1109/DIPED.1999.822146","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822146","url":null,"abstract":"A new effective approach to solution of the three-dimensional diffraction problem on the basis of a three-dimensional integral equation especially for resonance and short wave ranges is proposed.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126796843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/DIPED.1999.822138
R. Jobava, A. Gheonjian
The open-ended coaxial sensor is modeled by a non-uniform FDTD method. Such sensors are used for complex permittivity measurements in the MHz-GHz frequency range. The accuracy of the measurements depend greatly on the accuracy of the reflection coefficient computation. The non-uniform grid makes it possible to use very fine discretization in the critical area where the open-end of the coax is attached to the sample. The method can be used to calculate the reflection coefficient for very thin samples.
{"title":"Accurate modeling of open-ended coaxial sensor by non-uniform FDTD method","authors":"R. Jobava, A. Gheonjian","doi":"10.1109/DIPED.1999.822138","DOIUrl":"https://doi.org/10.1109/DIPED.1999.822138","url":null,"abstract":"The open-ended coaxial sensor is modeled by a non-uniform FDTD method. Such sensors are used for complex permittivity measurements in the MHz-GHz frequency range. The accuracy of the measurements depend greatly on the accuracy of the reflection coefficient computation. The non-uniform grid makes it possible to use very fine discretization in the critical area where the open-end of the coax is attached to the sample. The method can be used to calculate the reflection coefficient for very thin samples.","PeriodicalId":426777,"journal":{"name":"DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126893445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
DIPED - 99. Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory. Proceedings of 4th International Seminar/Workshop (IEEE Cat. No.99TH8402)
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