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10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.最新文献

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Scattering-matrix approach for modeling of electromagnetic response of plasmons in a grid-gated double-quantum-well field-effect transistor 栅极门控双量子阱场效应晶体管中等离子体电磁响应的散射矩阵建模
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1397099
V. Popov, T. V. Teperik, Y. Zayko, N. Horing
{"title":"Scattering-matrix approach for modeling of electromagnetic response of plasmons in a grid-gated double-quantum-well field-effect transistor","authors":"V. Popov, T. V. Teperik, Y. Zayko, N. Horing","doi":"10.1109/MMET.2004.1397099","DOIUrl":"https://doi.org/10.1109/MMET.2004.1397099","url":null,"abstract":"The terahertz (THz) absorption spectra of plasmon modes in a grid-gated double-quantum-well (DQW) field-effect transistor VET) structure is analyzed theoretically and numerically using the scattering matrix approach and is shown to faithfully reproduce strong resonant features of recent .experimental observations of THz photoconductivity in such a structure.","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128893408","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
Modeling of the LF-MF radiowave propagation over inhomogeneous irregular radiopaths 非均匀不规则辐射路径上低频-中频无线电波传播的模拟
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1397047
M. Dembelov, Y. Bashkuev
{"title":"Modeling of the LF-MF radiowave propagation over inhomogeneous irregular radiopaths","authors":"M. Dembelov, Y. Bashkuev","doi":"10.1109/MMET.2004.1397047","DOIUrl":"https://doi.org/10.1109/MMET.2004.1397047","url":null,"abstract":"A method of calculation of an attenuation function of the ground wave field by means of generalized Feinherg¿s equation taking into account the terrain relief is considered. It is possible to calculate the electromagnetic field in the LF-MF range over extensive inhomogeneous paths with a \"had\" conductivity. The attenuation function is calculated on a model of a plane Earth's surface on the first part of the path. Predicting maps of geoelectric sections and topographical digital maps characterizing the terrain relief and different types of forests are the basis for attenuation function calculations.","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129245965","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
Waves in the periodic stratified media with the linear law of change of permeability 具有渗透率线性变化规律的周期性层状介质中的波
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1397041
A.V. Bolovin, Y. Terentev
{"title":"Waves in the periodic stratified media with the linear law of change of permeability","authors":"A.V. Bolovin, Y. Terentev","doi":"10.1109/MMET.2004.1397041","DOIUrl":"https://doi.org/10.1109/MMET.2004.1397041","url":null,"abstract":"Transition matrices representation has been obtained analytically in the problem Floquet - Blocb for the periodic Structures containing arcas with the linear law of change of parameters. In the electrodynamics of periodic structures the result: obtained with the use of simple models of periodic mcdia. which assume analytical presentation of the problem Floquet - Bloeh and construction of regions of instability of solutions of differential equation, arc shown widely (I). Frequency regions of instability of solutions correspond to the spectrum gap of electromagnetic waves for the endless medium and to the selective reflection of waves for the semi-cndless system. Basic physical results related to ihc problem of propagatiun of electromagnetic waves in the periodic medium, have been got with the use of two simple one . dimension models (2.3). For medium with harmonically changing of permeability in space the research has been taka by the analysis of solutions of the equation Mathieu periodic sulutions. which are studied wd tabbed as the special functions. Similarly tile frequency values corresponding to such solutions are known as own values Second model from the generally accepted ones - model of multilayer periodic medium - allows to get in the analytical kind an enough simple matnx of transition on period and to explore fundamental parameters for the periodic system: spectrum of instabilities. dispersion, coefficients of reflection. It is advisable to illustrate the character of analytical presentation in the simple models of periodic medium for the case of normal propagation of transversal electromagnetic waves in the transparmt double-layer dielcctne medium, where the equations of Maxwell for complex amplitudes of hamionic fields lcad tu the differcntial equation of the second ordcr for the electric field:","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126108517","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
Matrix operator technique for analysis of wave transformers 波变分析的矩阵算子技术
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1396944
I. Petrusenko
{"title":"Matrix operator technique for analysis of wave transformers","authors":"I. Petrusenko","doi":"10.1109/MMET.2004.1396944","DOIUrl":"https://doi.org/10.1109/MMET.2004.1396944","url":null,"abstract":"The matrix operator technique for modeling mode dinraction is presented. This approach was developed with B view to substantiate some modal expansion methods. It allows one to prove the correctness of matrix operator models and to investigate the convergence of approximate solutions analytically. In this paper, the technique is applied to the analysis of two-port wave transformers. The developed models have the form of Cayley's transform of operator matrices. The approach can be useful for analytic-numerical solution of various electromagnetic problems.","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126818399","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
Comparison of two neural network optimization approaches 两种神经网络优化方法的比较
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1397081
E. A. Grimaldi, F. Grimaccia, M. Mussetta, R. Zich
{"title":"Comparison of two neural network optimization approaches","authors":"E. A. Grimaldi, F. Grimaccia, M. Mussetta, R. Zich","doi":"10.1109/MMET.2004.1397081","DOIUrl":"https://doi.org/10.1109/MMET.2004.1397081","url":null,"abstract":"This paper compares two optimization methods for training Neural Networks: the typical supervised feed-forward hackpropagation algorithm and an improved Particle Swarm Optimization method. The aim is to highlight advantages and drawbacks of these techniques in order to suitably apply them to electromagnetic problems. Some numerical results and comparisons are presented analyzing a load forecasting problem. Neural Networks are trained for a particular power system load consuption signal, for future time prediction.","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116150277","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
Transient wave beam diffraction by lossy dielectric half space 有耗介质半空间瞬态波束衍射
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1397025
A. Butrym, Yu-Yi Zheng, A. Dumin, O. Tretyakov
{"title":"Transient wave beam diffraction by lossy dielectric half space","authors":"A. Butrym, Yu-Yi Zheng, A. Dumin, O. Tretyakov","doi":"10.1109/MMET.2004.1397025","DOIUrl":"https://doi.org/10.1109/MMET.2004.1397025","url":null,"abstract":"Absrrrrd The paper considers a problem of a 3D impulse wave beam excitation by a circular disk with transient currents, its propagation in free space and diffraction by lossy dielectric half space. The problem is solved directly in Time Domain by Mode Basis Method. The fields are expanded into integrals by transversal modes for free space (socalled Bessel modes), the amplitudes of the expansion satisfy Kfein-Gordon equation. The evolution of tbese amplitudes with propagation and at diffraction is described with convolntion type propagation and diffraction operators.","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116651269","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: 7
Separated turnstile antenna on small LEO satellites 小型近地轨道卫星上的分离旋转门天线
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1397094
E. S. Moghaddam, N. Aboutorabian, S. Amiri, P. Rezael, S. Nikmehr
{"title":"Separated turnstile antenna on small LEO satellites","authors":"E. S. Moghaddam, N. Aboutorabian, S. Amiri, P. Rezael, S. Nikmehr","doi":"10.1109/MMET.2004.1397094","DOIUrl":"https://doi.org/10.1109/MMET.2004.1397094","url":null,"abstract":"Separated turnstile Antenna can provide saddle-shaped and hemispherical patterns. Its ability in making the arbitrary earth covering pattern has provided a lot of applications in small LEO satellites. In this article, the proper pattern for separated turnstile antenna which is mounted on a small LEO satellite, is synthesized and shaped. Wired model of separated turnstile antenna is analyzed by Moment Method and its gain pattern, polarization and input impedance are calculated. Ability of dual band operation of this antenna has been investigated in the paper and a dual band separated turnstile antenna bas been designed for the satellite. Also, Effects of antenna geometrical parameters on its pattern have been researched and calculated in the paper.","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121491684","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
Mathematical modeling and simulation of backscattering from hydrometeors of different types 不同类型水成物后向散射的数学建模与模拟
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1397014
A. Pitertsev, F. Yanovsky
{"title":"Mathematical modeling and simulation of backscattering from hydrometeors of different types","authors":"A. Pitertsev, F. Yanovsky","doi":"10.1109/MMET.2004.1397014","DOIUrl":"https://doi.org/10.1109/MMET.2004.1397014","url":null,"abstract":"This paper deals with modeling and simulation of backscattering at microwave remote sensing of clods. The case of ice crystals of different forms is considered. Results are useful for recognition of hydrometer types.;","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"54 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116779511","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
A new perturbation technique for eigenenergies of the screened coulomb potential 屏蔽库仑势本征能的新摄动技术
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1397033
I. Dobrovolska, R. S. Tutik
{"title":"A new perturbation technique for eigenenergies of the screened coulomb potential","authors":"I. Dobrovolska, R. S. Tutik","doi":"10.1109/MMET.2004.1397033","DOIUrl":"https://doi.org/10.1109/MMET.2004.1397033","url":null,"abstract":"The explicit semiclassical treatment of the logarithmic perturbation theory for the bound-state problem of the radial Shrodinger equation with the screened Coulomb potential is developed. Based upon h -expansions and new quantization conditions a novel procedure for deriving perturbation expansions is offered. Avoiding disadvantages of the standard approach, new bandy recursion formulae with the same simple form both for ground and excited states have been obtained.","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125224299","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
Electromagnetic modelling of cylindrically conformal array antennas 圆柱共形阵列天线的电磁建模
10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004. Pub Date : 2004-09-14 DOI: 10.1109/MMET.2004.1397087
A. Svezhentsev
{"title":"Electromagnetic modelling of cylindrically conformal array antennas","authors":"A. Svezhentsev","doi":"10.1109/MMET.2004.1397087","DOIUrl":"https://doi.org/10.1109/MMET.2004.1397087","url":null,"abstract":"An excitation problem for a cylindrical microstrip phased array antenna Is discussed. The array consists of N periodically arranged elements. Each element represents a sub-array of M patches. Each patch Is fed by a probe which is introduced in a line charge approximation. The Integral equation for finding the patch surface currents Is formulated and solved in the spatial domain by the moment method. The far field is calculated io a wide frequency range.","PeriodicalId":300473,"journal":{"name":"10th International Conference on Mathematical Methods in Electromagnetic Theory, 2004.","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122730860","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
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