Pub Date : 2016-09-01DOI: 10.1109/UWBUSIS.2016.7724163
Oleg O. Drobakhin, G. Sherstyuk, A. G. Mamedov, A.Yu. Tuluk
The algorithm of inverse aperture synthesis using generalized inverse filtering with evolutionary control realized in spatial frequency domain is considered. Optimal values of regularization parameters of filtration with evolutionary control by numerical simulation have been obtained. The optimal values provide the maximization of sharpness of the edges of the reconstructed radio image in combination with minimization of parasitic ripples in it. In contradistinction to the traditional inverse aperture synthesis for single-frequency signal, proposed approach is applied to the samples of signal obtained by transformation of multifrequency measured data to time domain. The suggested method provides improving sharpness of the radio image synthesized.
{"title":"Inverse aperture synthesis in the intermediate zone of radiation for radio image forming by optimal filtration with evolutionary control","authors":"Oleg O. Drobakhin, G. Sherstyuk, A. G. Mamedov, A.Yu. Tuluk","doi":"10.1109/UWBUSIS.2016.7724163","DOIUrl":"https://doi.org/10.1109/UWBUSIS.2016.7724163","url":null,"abstract":"The algorithm of inverse aperture synthesis using generalized inverse filtering with evolutionary control realized in spatial frequency domain is considered. Optimal values of regularization parameters of filtration with evolutionary control by numerical simulation have been obtained. The optimal values provide the maximization of sharpness of the edges of the reconstructed radio image in combination with minimization of parasitic ripples in it. In contradistinction to the traditional inverse aperture synthesis for single-frequency signal, proposed approach is applied to the samples of signal obtained by transformation of multifrequency measured data to time domain. The suggested method provides improving sharpness of the radio image synthesized.","PeriodicalId":423697,"journal":{"name":"2016 8th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121819088","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 : 2016-09-01DOI: 10.1109/UWBUSIS.2016.7724187
L. Filins’kyy
The model of water foam as a multilayer dielectric is presented in the paper. The structure was composed of seven layers, each of them had its own value of dielectric permittivity and loss tangent. The layers had a thickness of 5 and 10 mm for comparison. Calculations were made for the electromagnetic wave range of 8 - 12 GHz. Layers had value of foaming ratio of very wide range of 6 - 350. The results proved that model under discussion had data of good quality for absorbers design.
{"title":"Investigation of reflection and transmission characteristics in the foam medium","authors":"L. Filins’kyy","doi":"10.1109/UWBUSIS.2016.7724187","DOIUrl":"https://doi.org/10.1109/UWBUSIS.2016.7724187","url":null,"abstract":"The model of water foam as a multilayer dielectric is presented in the paper. The structure was composed of seven layers, each of them had its own value of dielectric permittivity and loss tangent. The layers had a thickness of 5 and 10 mm for comparison. Calculations were made for the electromagnetic wave range of 8 - 12 GHz. Layers had value of foaming ratio of very wide range of 6 - 350. The results proved that model under discussion had data of good quality for absorbers design.","PeriodicalId":423697,"journal":{"name":"2016 8th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131445043","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 : 2016-09-01DOI: 10.1109/UWBUSIS.2016.7724179
K. Kuznetsov, Y. Shckorbatov, N. Kolchigin, O. Nikolov
Cell answer to stress induced by microwaves, gamma-radiation and static magnetic field in reaction of cell nuclei and permeability of cell membranes in exfoliated human buccal epithelium cells have been investigated. Modification of the effects induced by gamma-radiation after exposure to microwaves and static magnetic field have been shown. Donor-ralated differences in cell answer to electromagnetic fields have been shown.
{"title":"Changes of chromatin and cell membranes in exfoliated human buccal epithelium cells exposed to non-ionizing and ionizing electromagnetic fields","authors":"K. Kuznetsov, Y. Shckorbatov, N. Kolchigin, O. Nikolov","doi":"10.1109/UWBUSIS.2016.7724179","DOIUrl":"https://doi.org/10.1109/UWBUSIS.2016.7724179","url":null,"abstract":"Cell answer to stress induced by microwaves, gamma-radiation and static magnetic field in reaction of cell nuclei and permeability of cell membranes in exfoliated human buccal epithelium cells have been investigated. Modification of the effects induced by gamma-radiation after exposure to microwaves and static magnetic field have been shown. Donor-ralated differences in cell answer to electromagnetic fields have been shown.","PeriodicalId":423697,"journal":{"name":"2016 8th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122858636","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 : 2016-09-01DOI: 10.1109/UWBUSIS.2016.7724146
O. Sukharevsky, V. Vasilets, G. Zalevsky
In our review the developed electrodynamic numerical methods for modeling of scattering characteristics of complex-shaped electrically large and resonant radar objects are considered. Futures of mentioned numerical algorithms and their advantages in comparison with other well known techniques are discussed. Proposed algorithms allow obtaining frequency responses of air, ground, and subsurface radar objects for given sounding conditions. Particular qualities of object ultrawideband impulse response modeling are also briefly discussed. In conclusion we demonstrate some results of numerical modeling of ultrawideband impulse responses of different air, ground, and subsurface objects in VHF, UHF, and SHF bands. Such results have a wide field of application for solving applied problems at the stage of development of effective wideband radars of different types.
{"title":"Numerical methods for modeling of radar wideband signal scattering by aerial, ground and subsurface objects","authors":"O. Sukharevsky, V. Vasilets, G. Zalevsky","doi":"10.1109/UWBUSIS.2016.7724146","DOIUrl":"https://doi.org/10.1109/UWBUSIS.2016.7724146","url":null,"abstract":"In our review the developed electrodynamic numerical methods for modeling of scattering characteristics of complex-shaped electrically large and resonant radar objects are considered. Futures of mentioned numerical algorithms and their advantages in comparison with other well known techniques are discussed. Proposed algorithms allow obtaining frequency responses of air, ground, and subsurface radar objects for given sounding conditions. Particular qualities of object ultrawideband impulse response modeling are also briefly discussed. In conclusion we demonstrate some results of numerical modeling of ultrawideband impulse responses of different air, ground, and subsurface objects in VHF, UHF, and SHF bands. Such results have a wide field of application for solving applied problems at the stage of development of effective wideband radars of different types.","PeriodicalId":423697,"journal":{"name":"2016 8th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123643857","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 : 2016-09-01DOI: 10.1109/UWBUSIS.2016.7724194
V. Katrich, V. Lyashchenko, N. Medvedev
The electrodynamic characteristics of coaxial-slot systems are calculated by the magnetomotive forces method (MMF) taking into account the internal and external space interconnections between the radiators on conditions of arbitrary location of the slot elements when internal and external spaces were filled with the dielectric for any values of permittivity. The problem of influence of interconnections between the radiators on the excitation and radiation of the array of narrow circumferential or arc transverse slots cut in the infinitely thin and perfectly conducting coaxial line screen was solved in this paper. The results of calculation and analysis of the amplitude and phase distributions in the slot arrays, directional and energy antenna characteristics depending on the working wavelength in cases of the slot element location on the infinite coaxial lines have been proposed. These results were compared with the results of the calculation without mutual interconnections.
{"title":"Electrodynamic characteristics of multielement coaxial-slot antenna","authors":"V. Katrich, V. Lyashchenko, N. Medvedev","doi":"10.1109/UWBUSIS.2016.7724194","DOIUrl":"https://doi.org/10.1109/UWBUSIS.2016.7724194","url":null,"abstract":"The electrodynamic characteristics of coaxial-slot systems are calculated by the magnetomotive forces method (MMF) taking into account the internal and external space interconnections between the radiators on conditions of arbitrary location of the slot elements when internal and external spaces were filled with the dielectric for any values of permittivity. The problem of influence of interconnections between the radiators on the excitation and radiation of the array of narrow circumferential or arc transverse slots cut in the infinitely thin and perfectly conducting coaxial line screen was solved in this paper. The results of calculation and analysis of the amplitude and phase distributions in the slot arrays, directional and energy antenna characteristics depending on the working wavelength in cases of the slot element location on the infinite coaxial lines have been proposed. These results were compared with the results of the calculation without mutual interconnections.","PeriodicalId":423697,"journal":{"name":"2016 8th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121881859","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/UWBUSIS.2016.7724164
B. Kochetov, A. Fedorov
Future progress and development in ultrasensitive detection and quantum-limited amplification of microwave signals in a wide frequency band is expected to be achieved by using new type architectures of parametric amplifiers based on chains of coupled Josephson junctions or superconducting quantum interference devices (SQUID). Over the past years the classical theory of the amplifiers in the framework of a nonlinear wave equation governing the node flux evolution along an array of coupled Josephson oscillators has been developed under continuum approximation. Although such amplifiers imply the quantum nature utilizing the Josephson effects there is no quantum approach to take into account quantum phenomena in Josephson traveling-wave parametric amplifiers (JTWPA). Here we formulate the Lagrangian approach to a one-dimensional chain of coupled Josephson junctions and take the first step to develop the quantum theory of JTWPAs by deriving an approximate quantum Hamiltonian of the chain.
{"title":"The Lagrangian approach to a Josephson traveling-wave parametric amplifier","authors":"B. Kochetov, A. Fedorov","doi":"10.1109/UWBUSIS.2016.7724164","DOIUrl":"https://doi.org/10.1109/UWBUSIS.2016.7724164","url":null,"abstract":"Future progress and development in ultrasensitive detection and quantum-limited amplification of microwave signals in a wide frequency band is expected to be achieved by using new type architectures of parametric amplifiers based on chains of coupled Josephson junctions or superconducting quantum interference devices (SQUID). Over the past years the classical theory of the amplifiers in the framework of a nonlinear wave equation governing the node flux evolution along an array of coupled Josephson oscillators has been developed under continuum approximation. Although such amplifiers imply the quantum nature utilizing the Josephson effects there is no quantum approach to take into account quantum phenomena in Josephson traveling-wave parametric amplifiers (JTWPA). Here we formulate the Lagrangian approach to a one-dimensional chain of coupled Josephson junctions and take the first step to develop the quantum theory of JTWPAs by deriving an approximate quantum Hamiltonian of the chain.","PeriodicalId":423697,"journal":{"name":"2016 8th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)","volume":"PP 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":"126355639","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：