Pub Date : 1996-09-10DOI: 10.1109/MMET.1996.565765
R. Vorobel, N. Opyr
The remotely-sensed images obtained from the satellites are widely used for study of the land, ocean, atmosphere etc. The use of remotely-sensed data, which are inherently digital, demands a degree of mathematical and statistical skill plus familiarity with digital computers. The sensors mounted on-board aircraft and satellites have to be capable of detecting radiance level ranging from low (for example, over oceans) to very high (for example, over snow or ice). For any particular area that is being imaged it is unlikely that the full dynamic range of the sensor will be used.
{"title":"Adaptive interpolation algorithm for transformation functions in image processing","authors":"R. Vorobel, N. Opyr","doi":"10.1109/MMET.1996.565765","DOIUrl":"https://doi.org/10.1109/MMET.1996.565765","url":null,"abstract":"The remotely-sensed images obtained from the satellites are widely used for study of the land, ocean, atmosphere etc. The use of remotely-sensed data, which are inherently digital, demands a degree of mathematical and statistical skill plus familiarity with digital computers. The sensors mounted on-board aircraft and satellites have to be capable of detecting radiance level ranging from low (for example, over oceans) to very high (for example, over snow or ice). For any particular area that is being imaged it is unlikely that the full dynamic range of the sensor will be used.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115411435","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 : 1996-09-10DOI: 10.1109/MMET.1996.565710
A. Serebryannikov, L.V. Vavriv
FD solutions and the inverse Fourier transform are widely used to solve problems of transient electromagnetics. To increase the efficiency of numerical modeling, the trial pulse response approach (TPRA) can be used. Various modifications of TPRA, which represent a generalization of the Dirac-response, are described.
{"title":"Trial pulse response approach: a basis for developing analysis of transient fields and signals","authors":"A. Serebryannikov, L.V. Vavriv","doi":"10.1109/MMET.1996.565710","DOIUrl":"https://doi.org/10.1109/MMET.1996.565710","url":null,"abstract":"FD solutions and the inverse Fourier transform are widely used to solve problems of transient electromagnetics. To increase the efficiency of numerical modeling, the trial pulse response approach (TPRA) can be used. Various modifications of TPRA, which represent a generalization of the Dirac-response, are described.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121833489","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 : 1996-09-10DOI: 10.1109/MMET.1996.565695
M. Solodyak, A. Gachkevich, O. Dziubachyk
Proposes a method of calculation for electromagnetic and temperature fields as well as mechanical stresses in ferromagnetic solids subjected to an harmonic electromagnetic field of industrial frequency. The nonlinearity of magnetic induction dependence upon magnetic-field strength is considered. The developed model is the generalization of well-known ones for nonferromagnetic solids. Interconnection of electromagnetic, temperature and mechanical fields is taken into account by Joule's and hysteresis heat and ponderomotive forces averaged on the period of an electromagnetic wave. In such an approach, the calculation procedure reduces to consecutive resolving of electrodynamics equations for ferromagnetic media (first stage) and uncoupled quasistatic thermoelasticity problems at given boundary and initial conditions (second stage).
{"title":"The thermoelasticity of ferromagnetic solids by deep induction heating","authors":"M. Solodyak, A. Gachkevich, O. Dziubachyk","doi":"10.1109/MMET.1996.565695","DOIUrl":"https://doi.org/10.1109/MMET.1996.565695","url":null,"abstract":"Proposes a method of calculation for electromagnetic and temperature fields as well as mechanical stresses in ferromagnetic solids subjected to an harmonic electromagnetic field of industrial frequency. The nonlinearity of magnetic induction dependence upon magnetic-field strength is considered. The developed model is the generalization of well-known ones for nonferromagnetic solids. Interconnection of electromagnetic, temperature and mechanical fields is taken into account by Joule's and hysteresis heat and ponderomotive forces averaged on the period of an electromagnetic wave. In such an approach, the calculation procedure reduces to consecutive resolving of electrodynamics equations for ferromagnetic media (first stage) and uncoupled quasistatic thermoelasticity problems at given boundary and initial conditions (second stage).","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115765736","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 : 1996-09-10DOI: 10.1109/MMET.1996.565686
V. Fisanov, D. Marakasov
The characteristics of the bulk and surface eigen plane waves in a chiroplasma medium are investigated for the case in which the static magnetic field is oriented perpendicular to the propagation plane and parallel to the perfectly conducting boundary. These waves form the full spectrum essential to the solution of the radiation and diffraction problems in the half-space of the chiroplasma media. Some notable features, such as modified pass and stop bands, unidirectionality of surface waves, and their complex attenuation on the normal to the boundary, may be taken into consideration in the design of novel microwave devices and components.
{"title":"Transverse propagation of electromagnetic waves in the magnetoactive chiroplasma","authors":"V. Fisanov, D. Marakasov","doi":"10.1109/MMET.1996.565686","DOIUrl":"https://doi.org/10.1109/MMET.1996.565686","url":null,"abstract":"The characteristics of the bulk and surface eigen plane waves in a chiroplasma medium are investigated for the case in which the static magnetic field is oriented perpendicular to the propagation plane and parallel to the perfectly conducting boundary. These waves form the full spectrum essential to the solution of the radiation and diffraction problems in the half-space of the chiroplasma media. Some notable features, such as modified pass and stop bands, unidirectionality of surface waves, and their complex attenuation on the normal to the boundary, may be taken into consideration in the design of novel microwave devices and components.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124807965","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 : 1996-09-10DOI: 10.1109/MMET.1996.565703
O. Budanov, S. Prosvirnin
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 solution of this problem the well known integral equation of electric field in the time domain (with unknown surface current density) is used.
{"title":"Symmetrical excitation of spherical segment by impulse dipole","authors":"O. Budanov, S. Prosvirnin","doi":"10.1109/MMET.1996.565703","DOIUrl":"https://doi.org/10.1109/MMET.1996.565703","url":null,"abstract":"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 solution of this problem the well known integral equation of electric field in the time domain (with unknown surface current density) is used.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124861068","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 : 1996-09-10DOI: 10.1109/MMET.1996.565766
B. Iavors'kyi, T. Rafa
{"title":"Selection of regularization parameters of inverse problem by computer simulation model","authors":"B. Iavors'kyi, T. Rafa","doi":"10.1109/MMET.1996.565766","DOIUrl":"https://doi.org/10.1109/MMET.1996.565766","url":null,"abstract":"","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126170704","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 : 1996-09-10DOI: 10.1109/MMET.1996.565720
A. G. Dudko, V. Naidenko
Branchings of rectangular waveguides, in particular, H-plane waveguide T-junctions are the canonical geometric shapes, that have been widely used in waveguide circuits over a long period of time. For wide band matching of the H-plane tee with a conductive lug, it has been proposed to bring the additional matching elements based on a frequency-selective structure, formed by rectangular (also rectangular with rounded inner angles) ledges made in the side walls of side waveguide. A tee with two compensative ledges has been considered. Such design distinguishes with unit simplicity that simplifies its production in the millimeter range. Moreover, such a way of matching improves the electric strength that makes it possible to be used in devices operating at increased power levels.
{"title":"A wide band matching of H-plane tee","authors":"A. G. Dudko, V. Naidenko","doi":"10.1109/MMET.1996.565720","DOIUrl":"https://doi.org/10.1109/MMET.1996.565720","url":null,"abstract":"Branchings of rectangular waveguides, in particular, H-plane waveguide T-junctions are the canonical geometric shapes, that have been widely used in waveguide circuits over a long period of time. For wide band matching of the H-plane tee with a conductive lug, it has been proposed to bring the additional matching elements based on a frequency-selective structure, formed by rectangular (also rectangular with rounded inner angles) ledges made in the side walls of side waveguide. A tee with two compensative ledges has been considered. Such design distinguishes with unit simplicity that simplifies its production in the millimeter range. Moreover, such a way of matching improves the electric strength that makes it possible to be used in devices operating at increased power levels.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123718137","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 : 1996-09-10DOI: 10.1109/MMET.1996.565773
M. Andriychuk
The phase synthesis problem according to the prescribed amplitude directivity pattern for a circular array is considered. The variational statement of the problem is used. As an optimization criterion, both the mean-square deviation of the created amplitude directivity pattern from the prescribed one and their weighted inner product are used. The problem is non-linear, and it is solved by successive approximation methods.
{"title":"Investigation of solutions of the phase synthesis problem for a circular array","authors":"M. Andriychuk","doi":"10.1109/MMET.1996.565773","DOIUrl":"https://doi.org/10.1109/MMET.1996.565773","url":null,"abstract":"The phase synthesis problem according to the prescribed amplitude directivity pattern for a circular array is considered. The variational statement of the problem is used. As an optimization criterion, both the mean-square deviation of the created amplitude directivity pattern from the prescribed one and their weighted inner product are used. The problem is non-linear, and it is solved by successive approximation methods.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115570248","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 : 1996-09-10DOI: 10.1109/MMET.1996.565705
Ihor Javorskyj, V. Mykhajlyshyn
Both rough recurrence and stochasticity are characteristic features of time changeability of many electromagnetic phenomena. Investigations of stochastic oscillations on the basis of nonstationary random processes of certain classes-periodically correlated, bi-, poly-, and almost periodically correlated-contribute to a wider understanding of oscillation physics. The authors study the probabilistic structure of stochastic recurrence phenomena on the basis of periodically correlated random processes. They develop the methodology and discuss application to the investigation of the probabilistic structure of physical processes.
{"title":"Probabilistic analysis of electromagnetic phenomena with stochastic periodicity","authors":"Ihor Javorskyj, V. Mykhajlyshyn","doi":"10.1109/MMET.1996.565705","DOIUrl":"https://doi.org/10.1109/MMET.1996.565705","url":null,"abstract":"Both rough recurrence and stochasticity are characteristic features of time changeability of many electromagnetic phenomena. Investigations of stochastic oscillations on the basis of nonstationary random processes of certain classes-periodically correlated, bi-, poly-, and almost periodically correlated-contribute to a wider understanding of oscillation physics. The authors study the probabilistic structure of stochastic recurrence phenomena on the basis of periodically correlated random processes. They develop the methodology and discuss application to the investigation of the probabilistic structure of physical processes.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116035569","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 : 1996-09-10DOI: 10.1109/MMET.1996.565742
V. Grimalsky, S. Koshevaya, A. Resin
Surface magnetic microwave polaritons of finite amplitude propagating along the interface between ferrite and nonlinear dielectric, located in external weakly non-uniform wall-like magnetic field, are theoretically investigated. The analysis is based on application of variational method added with bilinear relation like Lorenz lemma. It was shown that the wave dispersion and transverse wave profile along field non-uniformity essentially depend on wave amplitude.
{"title":"Nonlinear surface magnetic polaritons in non-uniform magnetic field","authors":"V. Grimalsky, S. Koshevaya, A. Resin","doi":"10.1109/MMET.1996.565742","DOIUrl":"https://doi.org/10.1109/MMET.1996.565742","url":null,"abstract":"Surface magnetic microwave polaritons of finite amplitude propagating along the interface between ferrite and nonlinear dielectric, located in external weakly non-uniform wall-like magnetic field, are theoretically investigated. The analysis is based on application of variational method added with bilinear relation like Lorenz lemma. It was shown that the wave dispersion and transverse wave profile along field non-uniformity essentially depend on wave amplitude.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116230352","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}
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