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MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings最新文献

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Modified auxiliary sources method for investigation of diffraction on the voluminous bodies of complicated form 研究复杂形状体积体衍射的修正辅助源法
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565632
F. Bogdanov, R. Zaridze, D. Karkashadze, P. Shubitidze
{"title":"Modified auxiliary sources method for investigation of diffraction on the voluminous bodies of complicated form","authors":"F. Bogdanov, R. Zaridze, D. Karkashadze, P. Shubitidze","doi":"10.1109/MMET.1996.565632","DOIUrl":"https://doi.org/10.1109/MMET.1996.565632","url":null,"abstract":"Based on the method of auxiliary sources, an effective method of solution of the problem of electromagnetic wave diffraction on a voluminous body is suggested, and numerical results for some geometries are obtained and analysed. The suggested method is based on the presentation of the solution as a combined expansion in terms of elementary (fundamental) and multiple (sphere harmonics) solutions of the Helmholtz equation. Type and distribution of the auxiliary sources are chosen in dependence of the main singularities of the incident and scattered fields. It is shown that only a correct choice of auxiliary sources ensures a boundary problem solution with guaranteed accuracy.","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":"114043400","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}
引用次数: 2
Contrast enhancement of remotely-sensed images 遥感图像的对比度增强
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565764
R. Vorobel
{"title":"Contrast enhancement of remotely-sensed images","authors":"R. Vorobel","doi":"10.1109/MMET.1996.565764","DOIUrl":"https://doi.org/10.1109/MMET.1996.565764","url":null,"abstract":"Environmental remote sensing is the measurement, from a distance, of the spectral features of the Earth's surface and atmosphere by sensor at the satellites or aircraft. These measurements are formed by the digital image of surface. For any particular area that is being imaged it is unlikely that full dynamic range of the sensor will be used. Not much detail can be seen on the image. Contrast between the dark and light areas for small detail is very low. All this problems make it important to have a contrast enhancement technique for image enhancement. In practice there are two cases for image enhancement. The first is processing of images at the frequency domain. The second is processing of images at the spatial domain.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"15 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":"130420662","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}
引用次数: 13
The numerical technique for analysis of the electromagnetic scattering by complicated periodic structures 复杂周期结构电磁散射的数值分析技术
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565769
S. Maly
{"title":"The numerical technique for analysis of the electromagnetic scattering by complicated periodic structures","authors":"S. Maly","doi":"10.1109/MMET.1996.565769","DOIUrl":"https://doi.org/10.1109/MMET.1996.565769","url":null,"abstract":"This paper presents a technique for the study of electrodynamics properties of complex media, composites and arrays that have a periodical structure. This technique is based on the minimal autonomous blocks (MAB) method and the theory of periodical structures. In accordance with Floquet's theorem, the problem of scattering of the plane electromagnetic wave from an array of one- or two-dimensional objects may be transformed to determine propagating Floquet's harmonics of the scattering field in the space wave guide.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"27 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":"114802170","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}
引用次数: 3
Measuring signal parameter estimation under object and material investigation by means of pulse electromagnetic fields 用脉冲电磁场估计物体和材料调查下的测量信号参数
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565737
P. Drabich
{"title":"Measuring signal parameter estimation under object and material investigation by means of pulse electromagnetic fields","authors":"P. Drabich","doi":"10.1109/MMET.1996.565737","DOIUrl":"https://doi.org/10.1109/MMET.1996.565737","url":null,"abstract":"Pulse electromagnetic sounding is one effective method for environment, object and material physicomechanical characteristics study. The investigated environment information is contained in response signals that represent a sequence of fading voltage pulses. Under investigation, the receiving converter is also affected by a number of random and regular noises of pulse and continuous character that cause a stochastic structure of the informative signal and do not allow one to determine its informative characteristics without special processing. The processing mode of the stochastic signals depends sufficiently on their mathematical model. For the problem of registered signal parameter estimation, its mathematical model may be presented in the form of a sequence combination of its homogeneous informative elements (momentary signal meanings, durations, etc.) that are random processes.","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":"130035928","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}
引用次数: 0
About one method of antenna array's synthesis through a given amplitude directivity pattern with regard to the mutual coupling 讨论了一种基于互耦的给定振幅方向图的天线阵列合成方法
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565777
L. Pasnak, P. Savenko
{"title":"About one method of antenna array's synthesis through a given amplitude directivity pattern with regard to the mutual coupling","authors":"L. Pasnak, P. Savenko","doi":"10.1109/MMET.1996.565777","DOIUrl":"https://doi.org/10.1109/MMET.1996.565777","url":null,"abstract":"A synthesis method for the linear antenna array of radiators through a given amplitude directivity pattern which accounts for the mutual coupling is described. Mutual couplings of radiators are taken into account by the method of an induced electromotive force. The number of optimal solutions of the synthesis problem and its qualitative characteristics are investigated by the branching theory methods. The numerical algorithms solving this problem are based on the successive approximation method. This method of synthesis is generalized on the case of nonequidistant antenna arrays.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"178 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":"115006194","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}
引用次数: 1
A new field theory approach for design of circular corrugated horn with axial slots 一种新的场理论方法来设计带轴向槽的圆形波纹角
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565719
F. Dubrovka, P. Stepanenko
{"title":"A new field theory approach for design of circular corrugated horn with axial slots","authors":"F. Dubrovka, P. Stepanenko","doi":"10.1109/MMET.1996.565719","DOIUrl":"https://doi.org/10.1109/MMET.1996.565719","url":null,"abstract":"Presents results of a theoretical investigation of circular corrugated horns with axial slots. A new field theory approach for calculation of the generalized scattering matrices of separate modules, which are obtained by dividing the circular horn into simple regions, is proposed. The problem is solved by the integral equation method. The numerical results obtained have been compared with known data. It is shown that the approach is highly efficient in its computer resources usage.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"48 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":"114976345","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}
引用次数: 2
Using active mediums for measuring transformations of the electromagnetic oscillation 利用有源介质测量电磁振荡的变换
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565739
F. Roman, M. Bogdana
{"title":"Using active mediums for measuring transformations of the electromagnetic oscillation","authors":"F. Roman, M. Bogdana","doi":"10.1109/MMET.1996.565739","DOIUrl":"https://doi.org/10.1109/MMET.1996.565739","url":null,"abstract":"The electromagnetic oscillations (e.m.o.) have a wide frequency range: from tenth parts of Hz (the infra-LF oscillations in a plasma of near space) to 1020 Hz (for the /spl gamma/-radiation). The electromagnetic radiation (e.m.r.), whose sources are molecules, atoms and atomic nuclei have a quantum character caused by terminating of energy of the radiating object. A durability of molecule, atom and atomic nucleus radiate processes is 10/sup -10/...10/sup -8/ sec. The radiate process in resonators may continue even 10/sup -3/ sec. There are, for example, 10/sup 5/...10/sup 7/ oscillations of the EM field intensity per one radiate act with frequency 10/sup -15/ Hz. Therefore, the e.m.o. of the first radiate act may be considered as a narrow-band process. During the interaction of e.m.o. with substance the power of EM field in substance is created by e.m.o.","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":"132334056","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}
引用次数: 0
Spherical waves representation of the Green's functions in the far field zone of printed antennas 打印天线远场区格林函数的球形波表示
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565650
S. Marchetti
{"title":"Spherical waves representation of the Green's functions in the far field zone of printed antennas","authors":"S. Marchetti","doi":"10.1109/MMET.1996.565650","DOIUrl":"https://doi.org/10.1109/MMET.1996.565650","url":null,"abstract":"The field problem for microwave and millimeter wave printed circuits and antennas is commonly approached with the aid of potential functions that are formulated in the spectral domain. In the space domain the latter are expressed like Sommerfeld integrals assessable only numerically. However, analytic asymptotic expressions are available for the far field problem. The present work presents a new expression for the Green's functions far field contribution that is a superposition of outgoing spherical waves and presents several useful feature for the analysis and synthesis of patch antennas.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"236 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":"127663967","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}
引用次数: 1
An arbitrary signal propagation in waveguides 任意信号在波导中的传播
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565707
S. B. Nikitskiy, O. Tretyakov, K. Yemelyanov
{"title":"An arbitrary signal propagation in waveguides","authors":"S. B. Nikitskiy, O. Tretyakov, K. Yemelyanov","doi":"10.1109/MMET.1996.565707","DOIUrl":"https://doi.org/10.1109/MMET.1996.565707","url":null,"abstract":"Transient electromagnetic wave propagation in a hollow waveguide of arbitrary cross section with perfectly conducting walls is considered. The time domain method employed is faithful to the nature of transients and thus is an efficient one. By means of the evolutionary waveguide equations method, the original vector electromagnetic problem is reduced to integration of the scalar one-dimensional Klein-Gordon equation. With the separation of variables method, its solution is obtained as an expansion in terms of the special basic set for the Klein-Gordon equation. The expansion coefficients are readily deduced by making use of the definition of an input signal. Analytical forms of the signal near its front, and numerical computations in other space-time domains are represented.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"50 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":"134061962","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}
引用次数: 5
1-D inverse problem solution for multilayered dielectric structure using K-signal conception 用k信号概念求解多层介质结构一维反问题
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings Pub Date : 1996-09-10 DOI: 10.1109/MMET.1996.565752
O. Drobakhin, D. Saltykov
{"title":"1-D inverse problem solution for multilayered dielectric structure using K-signal conception","authors":"O. Drobakhin, D. Saltykov","doi":"10.1109/MMET.1996.565752","DOIUrl":"https://doi.org/10.1109/MMET.1996.565752","url":null,"abstract":"1D inverse problem for multilayered dielectric structures is induced by different applications. The constancy of every layer parameters is given. This situation corresponds to the partial-constant profile of permittivity. The problem is to estimate values of dielectric constants and thickness of every layer simultaneously with only one-side access, thus only reflection coefficient (RC) information can be used.","PeriodicalId":270641,"journal":{"name":"MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings","volume":"142 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":"124467241","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}
引用次数: 1
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