Pub Date : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037029
V. Stankevych, I. Zhbadynskyi, Yurii Porokhovskyi
The problem of the stationary torsion oscillations of the opposite crack-surfaces, cracks are located in elastic biomaterial with thin interior layer, is solved by using non-classical boundary conditions. A system of two-dimensional boundary integral equations (BIEs) of the Helmholtz type with respect to unknown tangential displacements of the defects surfaces is deduced. Dependences of dynamic stress intensity factors (DSIF) in the cracks vicinity on the loading frequency and the material mismatch are analyzed.
{"title":"Boundary Integral Description of the Dynamic Cracks Interaction Through a Thin Elastic Layer","authors":"V. Stankevych, I. Zhbadynskyi, Yurii Porokhovskyi","doi":"10.1109/UkrMW58013.2022.10037029","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037029","url":null,"abstract":"The problem of the stationary torsion oscillations of the opposite crack-surfaces, cracks are located in elastic biomaterial with thin interior layer, is solved by using non-classical boundary conditions. A system of two-dimensional boundary integral equations (BIEs) of the Helmholtz type with respect to unknown tangential displacements of the defects surfaces is deduced. Dependences of dynamic stress intensity factors (DSIF) in the cracks vicinity on the loading frequency and the material mismatch are analyzed.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132797032","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10036962
Artem Hrinchenko, Oksana Mankovska, O. Yermakov
Hyperbolic metasurfaces exhibit a lot of unique properties including negative refraction, hyperlensing, surface waves manipulation and optical sensing. In this work, we provide the practical guide of the hyperbolic metasurfaces engineering. First, we retrieve the surface conductivity of a metasurface consisting of gold nanodisks from the reflectance spectrum. Then, we analyze the dependence of the resonant wavelengths and the spectral width of hyperbolic regime on the period of metasurface and size of nanodisks. The results obtained may be used to design a hyperbolic metasurface based on gold nanoparticles for any relevant purpose on demand.
{"title":"Engineering of Hyperbolic Metasurfaces Based on Gold Nanodisks","authors":"Artem Hrinchenko, Oksana Mankovska, O. Yermakov","doi":"10.1109/UkrMW58013.2022.10036962","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10036962","url":null,"abstract":"Hyperbolic metasurfaces exhibit a lot of unique properties including negative refraction, hyperlensing, surface waves manipulation and optical sensing. In this work, we provide the practical guide of the hyperbolic metasurfaces engineering. First, we retrieve the surface conductivity of a metasurface consisting of gold nanodisks from the reflectance spectrum. Then, we analyze the dependence of the resonant wavelengths and the spectral width of hyperbolic regime on the period of metasurface and size of nanodisks. The results obtained may be used to design a hyperbolic metasurface based on gold nanoparticles for any relevant purpose on demand.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122083581","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10036998
M. Buhaiov
Detection of multiple targets in high dynamic range and noise varying environment is a great challenge of modern radar techniques. Traditional CFAR algorithms cannot provide reliable detection of all targets in such sophisticated environment. To overcome this drawback we propose detector with iterative thresholding of frequency samples relative standard deviation. Applying proposed approach will ensure reliable detection of multiple targets regardless of dynamic range of signals and noise power.
{"title":"Multiple Targets CFAR Detector with Iterative Thresholding of Frequency Samples RSD","authors":"M. Buhaiov","doi":"10.1109/UkrMW58013.2022.10036998","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10036998","url":null,"abstract":"Detection of multiple targets in high dynamic range and noise varying environment is a great challenge of modern radar techniques. Traditional CFAR algorithms cannot provide reliable detection of all targets in such sophisticated environment. To overcome this drawback we propose detector with iterative thresholding of frequency samples relative standard deviation. Applying proposed approach will ensure reliable detection of multiple targets regardless of dynamic range of signals and noise power.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123614122","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037047
A. Svezhentsev, V. Volski, G. Vandenbosch
Plane wave scattering by a periodic finite array with graphene patches on a cylindrical surface (CPFGA) is studied. In discussed CPFGA N graphene patches are placed on a dielectric rod (DR) surface in the azimuth direction. To build a problem solution the Method of Moments (MoM) was applied in the spectral domain using Piece Wise Sinusoidal (PWS) basis functions. The cases of $mathrm{N}=1,2,3,4$ patches are studied. The radar cross section versus frequency is studied for both E- and H-plane wave polarization. The current distributions and far fields at the resonant frequencies are calculated.
{"title":"Scattering Characteristics of Periodic Finite Array with Graphene Patches on Cylindrical Surface","authors":"A. Svezhentsev, V. Volski, G. Vandenbosch","doi":"10.1109/UkrMW58013.2022.10037047","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037047","url":null,"abstract":"Plane wave scattering by a periodic finite array with graphene patches on a cylindrical surface (CPFGA) is studied. In discussed CPFGA N graphene patches are placed on a dielectric rod (DR) surface in the azimuth direction. To build a problem solution the Method of Moments (MoM) was applied in the spectral domain using Piece Wise Sinusoidal (PWS) basis functions. The cases of $mathrm{N}=1,2,3,4$ patches are studied. The radar cross section versus frequency is studied for both E- and H-plane wave polarization. The current distributions and far fields at the resonant frequencies are calculated.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127091461","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037052
A. Pokusinskyi, A. Kasatkin
Nonlinear $rf$ dynamics of composite Abrikosov vortices in two-band superconductors is considered in the framework of the elaborated phenomenological model. The possibility of dissociation of composite Abrikosov vortices with a whole magnetic flux quantum into fractional components under the influence of a rather strong microwave current is argued. The threshold for such kind of dissociation is calculated as a function of the microwave current amplitude and frequency. The possible manifestation of this type of vortex dissociation through the peculiarities of the amplitude dependencies of nonlinear surface resistance at different frequencies is considered.
{"title":"Nonlinear Microwave Dynamics of Fractional Vortices in Two-Band Superconductors","authors":"A. Pokusinskyi, A. Kasatkin","doi":"10.1109/UkrMW58013.2022.10037052","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037052","url":null,"abstract":"Nonlinear $rf$ dynamics of composite Abrikosov vortices in two-band superconductors is considered in the framework of the elaborated phenomenological model. The possibility of dissociation of composite Abrikosov vortices with a whole magnetic flux quantum into fractional components under the influence of a rather strong microwave current is argued. The threshold for such kind of dissociation is calculated as a function of the microwave current amplitude and frequency. The possible manifestation of this type of vortex dissociation through the peculiarities of the amplitude dependencies of nonlinear surface resistance at different frequencies is considered.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129126804","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037165
G. P. Zouros
In this work the resonant frequencies in spheroidal metallic cavities loaded with isotropic and anisotropic material, are studied. For the case of isotropic infills, an extended bound-ary condition integral equation method (referred hereafter as extended integral equation) is employed while, a local point tech-nique is developed for anisotropic loadings. The anisotropy used in this work is of uniaxial type while prolate and oblate spheroidal cavities are studied. The extended integral equation is based on numerical integration of the involved special functions along the generating curve of the spheroidal surface. On the contrary, the local point technique satisfies the requisite boundary condition at a predefined set of points on the generating curve without the necessity to apply integration techniques. The emerging hybrid modes are examined and discussed. In particular, the spheroidal cavity spectrum for isotropic infills is extracted and compared by both the extended integral equation and the local point technique. Concerning uniaxial loaded cavities, the resonant frequencies are calculated solely by the local point technique. To validate these results, we utilize the HFSS commercial software. The local point technique turns out to be computationally efficient in terms of CPU time and memory consumption, as compared to the commercial solver. Various numerical results are presented and discussed.
{"title":"Resonant Frequencies Studies in Isotropic and Anisotropic Spheroidal Cavities by an Extended Integral Equation and a Local Point Technique: Invited Paper","authors":"G. P. Zouros","doi":"10.1109/UkrMW58013.2022.10037165","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037165","url":null,"abstract":"In this work the resonant frequencies in spheroidal metallic cavities loaded with isotropic and anisotropic material, are studied. For the case of isotropic infills, an extended bound-ary condition integral equation method (referred hereafter as extended integral equation) is employed while, a local point tech-nique is developed for anisotropic loadings. The anisotropy used in this work is of uniaxial type while prolate and oblate spheroidal cavities are studied. The extended integral equation is based on numerical integration of the involved special functions along the generating curve of the spheroidal surface. On the contrary, the local point technique satisfies the requisite boundary condition at a predefined set of points on the generating curve without the necessity to apply integration techniques. The emerging hybrid modes are examined and discussed. In particular, the spheroidal cavity spectrum for isotropic infills is extracted and compared by both the extended integral equation and the local point technique. Concerning uniaxial loaded cavities, the resonant frequencies are calculated solely by the local point technique. To validate these results, we utilize the HFSS commercial software. The local point technique turns out to be computationally efficient in terms of CPU time and memory consumption, as compared to the commercial solver. Various numerical results are presented and discussed.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129007760","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037012
O. Maksymovych, T. Solyar, A. Mazurak
A method of studying dynamic stresses in orthotropic plates with holes has been developed. To solve the problem, the Laplace transform and the method of integral equations are used. The kernels of integral equations are given as the sum of kernels for a static problem and integrated functions. The Prudnikov formula fitted to dynamic problems of the theory of elasticity is used to perform the Laplace inversion. Dynamic stresses near an elliptical hole for various anisotropic materials are calculated. It is shown that the developed algorithm allows us to determine dynamic stresses over time with controlled accuracy.
{"title":"Determination of Dynamic Stress Concentrations in Orthotropic Plates Based on the Regularized Laplace Inversion Formula","authors":"O. Maksymovych, T. Solyar, A. Mazurak","doi":"10.1109/UkrMW58013.2022.10037012","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037012","url":null,"abstract":"A method of studying dynamic stresses in orthotropic plates with holes has been developed. To solve the problem, the Laplace transform and the method of integral equations are used. The kernels of integral equations are given as the sum of kernels for a static problem and integrated functions. The Prudnikov formula fitted to dynamic problems of the theory of elasticity is used to perform the Laplace inversion. Dynamic stresses near an elliptical hole for various anisotropic materials are calculated. It is shown that the developed algorithm allows us to determine dynamic stresses over time with controlled accuracy.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117017521","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037016
K. Lukin, D. Tatyanko, O. Zemlyaniy, V. Palamarchuck, S. Lukin, M. Zaets
The papers presents a data acquisition hardware and software that have been designed for 16-th antenna Stepped-Frequency Noise SAR with MISO configuration for 2D real-time imaging. Data acquisition board, program algorithm and its realization are described. There is considered a multi thread program realization and program execution time estimation. Experimental results of 2D real-time image processing are presented.
{"title":"Data Acquisition and Signal Processing by 16-Antennas' Receiver of Stepped Frequency Noise SAR","authors":"K. Lukin, D. Tatyanko, O. Zemlyaniy, V. Palamarchuck, S. Lukin, M. Zaets","doi":"10.1109/UkrMW58013.2022.10037016","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037016","url":null,"abstract":"The papers presents a data acquisition hardware and software that have been designed for 16-th antenna Stepped-Frequency Noise SAR with MISO configuration for 2D real-time imaging. Data acquisition board, program algorithm and its realization are described. There is considered a multi thread program realization and program execution time estimation. Experimental results of 2D real-time image processing are presented.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"21 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120982289","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037095
D. Mayboroda, S. Pogarsky
The paper presents the results of modeling the main electrodynamic characteristics of a disk microstrip antenna with a set of slotted inhomogeneities. The geometric dimensions of inhomogeneities meet the law of decreasing geometric progression with a given denominator. Antenna feeding is carried out using a complex composition element: connection with external circuits is carried out using a segment of a grounded coplanar line, and the excitation of the disk resonator itself is carried out using an additional ring resonator. The simulation was carried out within the framework of the finite element method. The possibility of operation in several frequency subranges is shown.
{"title":"Disk Antenna with Conductive Feeding","authors":"D. Mayboroda, S. Pogarsky","doi":"10.1109/UkrMW58013.2022.10037095","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037095","url":null,"abstract":"The paper presents the results of modeling the main electrodynamic characteristics of a disk microstrip antenna with a set of slotted inhomogeneities. The geometric dimensions of inhomogeneities meet the law of decreasing geometric progression with a given denominator. Antenna feeding is carried out using a complex composition element: connection with external circuits is carried out using a segment of a grounded coplanar line, and the excitation of the disk resonator itself is carried out using an additional ring resonator. The simulation was carried out within the framework of the finite element method. The possibility of operation in several frequency subranges is shown.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121275008","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037174
O. Zaichenko, N. Zaichenko, Iurii Khoroshailo, Olga Grigorieva
The multiprobe microwave multimeter frequency properties dependence on the its sensors periodicity is considered in the report. The multimeter is device for incident, passing, reflected power and modulus and phase of load reflection coefficient measurement. The part of multiprobe microwave multimeter is a section with equidistantly mounted sensors. It is a periodic structure. The proposed model of a multiprobe microwave multimeter unit with equidistantly mounted sensors is grounded on the Floquet theorem and continuity condition. There was analyzed mathematical models for periodic structures and their frequency properties. There was explained presence of passing band and forbidden band in the frequency range on the basis of this model.
{"title":"Multiprobe Microwave Multimeter Frequency Properties Dependence on the Its Sensors Periodicity","authors":"O. Zaichenko, N. Zaichenko, Iurii Khoroshailo, Olga Grigorieva","doi":"10.1109/UkrMW58013.2022.10037174","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037174","url":null,"abstract":"The multiprobe microwave multimeter frequency properties dependence on the its sensors periodicity is considered in the report. The multimeter is device for incident, passing, reflected power and modulus and phase of load reflection coefficient measurement. The part of multiprobe microwave multimeter is a section with equidistantly mounted sensors. It is a periodic structure. The proposed model of a multiprobe microwave multimeter unit with equidistantly mounted sensors is grounded on the Floquet theorem and continuity condition. There was analyzed mathematical models for periodic structures and their frequency properties. There was explained presence of passing band and forbidden band in the frequency range on the basis of this model.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121295120","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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