Pub Date : 2018-07-01DOI: 10.1109/MMET.2018.8460347
O. Klimishen, S. Berezina, Y. Kozhushko, I. Vasil'eva
The paper analyses some challenges, that arise at processing of composite images. It classifies the factors influencing tone intensity of images received by optoelectronic surveillance systems. An approach for tone correction of heterogeneous images is substantiated. The paper proves that for investigation of changes in color properties of multi-tone images the hue-saturation-value (HSV) color model is more appropriate.
{"title":"On the Possibility of Tone Correction of Heterogeneous Images Received by Optoelectronic Surveillance Systems","authors":"O. Klimishen, S. Berezina, Y. Kozhushko, I. Vasil'eva","doi":"10.1109/MMET.2018.8460347","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460347","url":null,"abstract":"The paper analyses some challenges, that arise at processing of composite images. It classifies the factors influencing tone intensity of images received by optoelectronic surveillance systems. An approach for tone correction of heterogeneous images is substantiated. The paper proves that for investigation of changes in color properties of multi-tone images the hue-saturation-value (HSV) color model is more appropriate.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124010848","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460251
V. Pavlikov, V. Volosyuk, S. Zhyla
Passive radars are such radars that record and process signals of the objects own radiation within the radio wave band. They are used to solve a wide range of remote sensing problems. The observations registered by such radars are a mixture of stochastic signals of the investigated and interfering objects, as well as the internal noise of the receiver. Signals and noise are completely random, and their statistical characteristics are the same. Another feature of the transmitting radio thermal signals is that their emission spectrum is ultra-wideband (UWB) (except for polyatomic gases, which are characterized by discrete absorption and emission lines). Therefore, it is expedient to provide wide- or UWB for the passive radars operating frequencies band. Transition to UWB signal processing requires the improvement of the passive UWB radars theory. This theory should be able to synthesize new algorithms for signal processing and reveal the physical essence of parameter estimates at the output of the radar. This will allow solving the inverse problems of estimating the parameters and characteristics of the objects. Results of many years of research are summarized in this paper, a logical connection is formed between the key elements of the microwave radiation theory, the mathematical apparatus for processing UWB signals and the fundamentals of the optimal signal processing algorithms synthesis. Examples of the signal processing algorithm synthesis in a single- and a multichannel passive radar are also given.
{"title":"Ultra-wideband Passive radars Fundamental Theory and Applications","authors":"V. Pavlikov, V. Volosyuk, S. Zhyla","doi":"10.1109/MMET.2018.8460251","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460251","url":null,"abstract":"Passive radars are such radars that record and process signals of the objects own radiation within the radio wave band. They are used to solve a wide range of remote sensing problems. The observations registered by such radars are a mixture of stochastic signals of the investigated and interfering objects, as well as the internal noise of the receiver. Signals and noise are completely random, and their statistical characteristics are the same. Another feature of the transmitting radio thermal signals is that their emission spectrum is ultra-wideband (UWB) (except for polyatomic gases, which are characterized by discrete absorption and emission lines). Therefore, it is expedient to provide wide- or UWB for the passive radars operating frequencies band. Transition to UWB signal processing requires the improvement of the passive UWB radars theory. This theory should be able to synthesize new algorithms for signal processing and reveal the physical essence of parameter estimates at the output of the radar. This will allow solving the inverse problems of estimating the parameters and characteristics of the objects. Results of many years of research are summarized in this paper, a logical connection is formed between the key elements of the microwave radiation theory, the mathematical apparatus for processing UWB signals and the fundamentals of the optimal signal processing algorithms synthesis. Examples of the signal processing algorithm synthesis in a single- and a multichannel passive radar are also given.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125212499","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 : 2018-07-01DOI: 10.1109/mmet.2018.8460367
A. Puzanov, A. Kuleshov, Y. Kovshov, S. Ponomarenko
Numerical calculations of torch discharge (TD) resistance (Rd) without accounting the inductance show that calculations accuracy decreases if a) the TD diameter decreases; b) the TD length increases; c) value of Rd is small (less 1 k Ω); d) “measured” frequencies approach f0,1. It results in a necessity to introduce an equivalent inductance into the Neiman’ scheme. It is shown that the resonant frequency fr of discharge circuit is proportional approximately to fmaxthat is the upper limit of the frequency range where the circuit theory remains suitable for the TD modeling. Thus, the definition of fr and fmaxallows to make the function a more precise. (The function a is the voltage ratio at those the TD holds its electrical and geometrical characteristics).
对不考虑电感的焊枪放电电阻Rd的数值计算表明:a)焊枪放电直径减小，计算精度降低;b) TD长度增大;c) Rd值很小(小于1 k Ω);D)“测量”频率接近f0,1。因此，有必要在内曼格式中引入等效电感。结果表明，放电电路的谐振频率近似与fmax成正比，fmax是电路理论仍然适用于TD建模的频率范围的上限。因此，定义fr和fmaxf可以使函数更加精确。(函数a是TD保持其电气和几何特性时的电压比)。
{"title":"Torch Discharge Active Resistance Determination Considering Its Equivalent Inductance","authors":"A. Puzanov, A. Kuleshov, Y. Kovshov, S. Ponomarenko","doi":"10.1109/mmet.2018.8460367","DOIUrl":"https://doi.org/10.1109/mmet.2018.8460367","url":null,"abstract":"Numerical calculations of torch discharge (TD) resistance (R<inf>d</inf>) without accounting the inductance show that calculations accuracy decreases if a) the TD diameter decreases; b) the TD length increases; c) value of R<inf>d</inf> is small (less 1 k Ω); d) “measured” frequencies approach f<inf>0,1</inf>. It results in a necessity to introduce an equivalent inductance into the Neiman’ scheme. It is shown that the resonant frequency f<inf>r</inf> of discharge circuit is proportional approximately to f<inf>max</inf>that is the upper limit of the frequency range where the circuit theory remains suitable for the TD modeling. Thus, the definition of f<inf>r</inf> and f<inf>max</inf>allows to make the function a more precise. (The function a is the voltage ratio at those the TD holds its electrical and geometrical characteristics).","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"25 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114045497","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460262
M. Kaliberda, S. Pogarsky, L. Lytvynenko
The scattering by graphene multi-layered strip grating is considered. To model the whole structure two different approaches are used and compared. The first one is based on the operator method. Here we obtain system of operator equations which are equivalent to the Fredholm integral equations. The solution of a so-called key problem, the diffraction problem by a single planar graphene grating, is obtained by the method of singular integral equations. The second approach is based entirely on the method of singular integral equations. Frequency dependences of the scattering and absorption coefficients are presented in the THz range.
{"title":"Modeling of Wave Scattering by Graphene Strip Gratings Using Integral Equations Combined with Operator Method","authors":"M. Kaliberda, S. Pogarsky, L. Lytvynenko","doi":"10.1109/MMET.2018.8460262","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460262","url":null,"abstract":"The scattering by graphene multi-layered strip grating is considered. To model the whole structure two different approaches are used and compared. The first one is based on the operator method. Here we obtain system of operator equations which are equivalent to the Fredholm integral equations. The solution of a so-called key problem, the diffraction problem by a single planar graphene grating, is obtained by the method of singular integral equations. The second approach is based entirely on the method of singular integral equations. Frequency dependences of the scattering and absorption coefficients are presented in the THz range.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115447967","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460333
V. Fitio, I. Yaremchuk, A. Bendzyak, Y. Bobitski
Developed a numerical method for calculating propagation constants of localized modes of planar waveguides, as well as the solution of the stationary Schrödinger equation. The method is based on the Fourier transform of the wave equation. As a result, we obtain an integral equation in which the integral is replaced by summation. Ultimately, we obtain the problem of linear algebra with eigenvalues and eigenvectors. The method is verified on many examples. It is numerically stable and provides high accuracy of calculation (Abstract)
{"title":"Numerical Analysis of Gradient Planar Waveguides in Frequency Domain","authors":"V. Fitio, I. Yaremchuk, A. Bendzyak, Y. Bobitski","doi":"10.1109/MMET.2018.8460333","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460333","url":null,"abstract":"Developed a numerical method for calculating propagation constants of localized modes of planar waveguides, as well as the solution of the stationary Schrödinger equation. The method is based on the Fourier transform of the wave equation. As a result, we obtain an integral equation in which the integral is replaced by summation. Ultimately, we obtain the problem of linear algebra with eigenvalues and eigenvectors. The method is verified on many examples. It is numerically stable and provides high accuracy of calculation (Abstract)","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129499793","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460255
A. Kupriianov, V. Tuz, V. Khardikov, W. Han, Y. Kivshar
We demonstrate how to excite a resonant state resembling an axial toroidal dipole in metasurfaces made of particle clusters composed of three dielectric disks (trimers). The toroidal dipole response appears due to a symmetry breaking in the cluster geometry, via an energy release from an electromagnetic trapped (dark) mode. We consider several designs of metasurfaces where an asymmetry is introduced into the cluster by either employing disks of different radii or identical disks with holes. We discuss in detail the effect of different asymmetries in metasurface's geometry on characteristics of the axial toroidal dipole response.
{"title":"Axial Toroidal Dipole Modes in All- Dielectric Trimer Metasurfaces","authors":"A. Kupriianov, V. Tuz, V. Khardikov, W. Han, Y. Kivshar","doi":"10.1109/MMET.2018.8460255","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460255","url":null,"abstract":"We demonstrate how to excite a resonant state resembling an axial toroidal dipole in metasurfaces made of particle clusters composed of three dielectric disks (trimers). The toroidal dipole response appears due to a symmetry breaking in the cluster geometry, via an energy release from an electromagnetic trapped (dark) mode. We consider several designs of metasurfaces where an asymmetry is introduced into the cluster by either employing disks of different radii or identical disks with holes. We discuss in detail the effect of different asymmetries in metasurface's geometry on characteristics of the axial toroidal dipole response.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129736658","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460337
S. Khutornenko, A. Osadchuk, D. Vasilchuk, D. Semenets, V. V. Abramova
The paper deals with development of ma-trix-operation method of solving equations of thickness-shear (TSh) vibrations of piezo-electric quartz plates for rotated Y-cut with the aim of analytic description of vibrations when the plate has a limited length. The basic equations of TSh - vibrations for arbitrary boundary conditions are obtained.
{"title":"TSh Vibrations of Limited Size Plates of Rotated Y-cut Quartz with Development of Matrix-operation Method for Solving Equations","authors":"S. Khutornenko, A. Osadchuk, D. Vasilchuk, D. Semenets, V. V. Abramova","doi":"10.1109/MMET.2018.8460337","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460337","url":null,"abstract":"The paper deals with development of ma-trix-operation method of solving equations of thickness-shear (TSh) vibrations of piezo-electric quartz plates for rotated Y-cut with the aim of analytic description of vibrations when the plate has a limited length. The basic equations of TSh - vibrations for arbitrary boundary conditions are obtained.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127978709","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460387
Y. Kovshov, S. Ponomarenko, S. Kishko, A. Likhachev, A. Danik, E. Khutoryan, Dmytro Zahrevskyi, A. Kuleshov
Effective operation of a clinotron, as well as any other Cherenkov electron vacuum device, critically depends on electron beam formation quality and velocity spreads. Main results, related with an electron gun analysis and electron beam formation for a clinotron are presented in this paper. To study the longitudinal velocity spreads, the sheet electron beam has been investigated by means of 3D particle tracking simulations. Verification of obtained results was carried out by simulation in CST Particle Studio.
{"title":"Tracking Analysis of a Sheet Electron Beam for Clinotron Tube","authors":"Y. Kovshov, S. Ponomarenko, S. Kishko, A. Likhachev, A. Danik, E. Khutoryan, Dmytro Zahrevskyi, A. Kuleshov","doi":"10.1109/MMET.2018.8460387","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460387","url":null,"abstract":"Effective operation of a clinotron, as well as any other Cherenkov electron vacuum device, critically depends on electron beam formation quality and velocity spreads. Main results, related with an electron gun analysis and electron beam formation for a clinotron are presented in this paper. To study the longitudinal velocity spreads, the sheet electron beam has been investigated by means of 3D particle tracking simulations. Verification of obtained results was carried out by simulation in CST Particle Studio.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128078946","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460230
Y. Penkin, V. Katrich, M. Nesterenko, S. Berdnik
A mathematical model of the T-junction of two rectangular waveguides coupling through a narrow slot is developed by a method of induced magnetomotive forces (MMF). A membrane made of a material with metallic properties overlaps the slot aperture. The hollow waveguides are working in single mode regime. It was shown that a thin bismuth membrane can be used to control power division between the output arms of the waveguide junction.
{"title":"Coupling of Two Rectangular Waveguides Through a Slot with an Impedance Membrane","authors":"Y. Penkin, V. Katrich, M. Nesterenko, S. Berdnik","doi":"10.1109/MMET.2018.8460230","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460230","url":null,"abstract":"A mathematical model of the T-junction of two rectangular waveguides coupling through a narrow slot is developed by a method of induced magnetomotive forces (MMF). A membrane made of a material with metallic properties overlaps the slot aperture. The hollow waveguides are working in single mode regime. It was shown that a thin bismuth membrane can be used to control power division between the output arms of the waveguide junction.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130079639","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460224
A. Spiridonov, E. Karchevskii
Effective numerical approach based on a modification of the residual inverse iteration method for solution of the Lasing Eigenvalue Problem is proposed. The numerical study demonstrates that this algorithm allows to compute all the spectral characteristics of dielectric microcavity lasers in a given frequency interval with high accuracy.
{"title":"Residual Inverse Iteration for the Lasing Eigenvalue Problem","authors":"A. Spiridonov, E. Karchevskii","doi":"10.1109/MMET.2018.8460224","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460224","url":null,"abstract":"Effective numerical approach based on a modification of the residual inverse iteration method for solution of the Lasing Eigenvalue Problem is proposed. The numerical study demonstrates that this algorithm allows to compute all the spectral characteristics of dielectric microcavity lasers in a given frequency interval with high accuracy.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133257986","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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