发布求助
文献互助 智能选刊 最新文献

Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)最新文献

筛选
英文 中文
One class of waveguide resonators: algorithms based on semi-inversion technique in time and frequency domain 一类波导谐振器:基于时频半反转技术的算法
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.888531
N. Yashina
{"title":"One class of waveguide resonators: algorithms based on semi-inversion technique in time and frequency domain","authors":"N. Yashina","doi":"10.1109/MMET.2000.888531","DOIUrl":"https://doi.org/10.1109/MMET.2000.888531","url":null,"abstract":"An approach, based on extraction and analytical inversion of the singular part of the boundary value problem (BVP) operator in the frequency and time domain is applied to the one class of resonant structures in waveguides (coaxial type plane discontinuities bifurcation's, shunts, slots, irises, steps, disks etc.). Thus the initial BVP and BVP are reduced to the matrix equation of the second kind or to the Volterra integral equation of the second kind (with a straightforward scheme of time marching). All steps of the technique are mathematically proved. The convergence of numerical algorithms is proved also and estimated analytically. Special attention is paid to computer implementation of algorithms developed and various tests of them. Thus the convergence of numerical solutions is thoroughly investigated and analytical estimates are illustrated by numerical results.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131240843","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
Transient radio wave scattering by aeration zones 瞬态无线电波散射的曝气区
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.888576
S. Masalov, O.O. Puzanov
{"title":"Transient radio wave scattering by aeration zones","authors":"S. Masalov, O.O. Puzanov","doi":"10.1109/MMET.2000.888576","DOIUrl":"https://doi.org/10.1109/MMET.2000.888576","url":null,"abstract":"It is shown that the availability of water can be detected only by reflection from a capillary fringe situated in a region contiguous with water. One has to take into account this result for a more exact determination of the water depth in ground. It has been established that the observed pulse acquires a duration above the source pulse. The calculation results have shown that measurement errors of frequency dependencies of permittivities and specific conductivities that are used as initial data manifest during the calculation of the diffraction fields for structures of large depth (that are more than 2-3 meters). This is a result of the small amplitudes of the pulses reflected from deep discontinuities. In fact these errors bring about a \"false reflection\" preceding reflections from the capillary fringe and water. This effect reveals a violation of the causality law and is a consequence of the disturbed connection between the real and imaginary parts of complex permittivity. As it is known, this connection is determined after the Kramers-Kronig relations. On this basis a conclusion is made about the necessity of refinement of the source experimental data.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132673651","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
Two reflector non-symmetric shaped antenna systems 双反射面非对称形天线系统
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.888578
E. Hasanov
{"title":"Two reflector non-symmetric shaped antenna systems","authors":"E. Hasanov","doi":"10.1109/MMET.2000.888578","DOIUrl":"https://doi.org/10.1109/MMET.2000.888578","url":null,"abstract":"Two reflector antenna systems with non-symmetric reflecting surfaces under GO approximation are investigated. It is shown, that the problem of forming a desired far field pattern leads to solving the system of partial differential equations with respect to mapping functions between wave fronts. One of these equations is nonlinear and expresses the energy conversation law. It is shown that this equation can be solved separately in the class of non-smooth functions which has a discontinuity of the first kind along a given curve.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130377243","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
Adiabatic invariants for electromagnetic waves guided by time-varying plasma structures 时变等离子体结构引导电磁波的绝热不变量
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.888525
M. Bakunov, V.B. Gildenburg, N. Zharova, S. N. Zhukov
{"title":"Adiabatic invariants for electromagnetic waves guided by time-varying plasma structures","authors":"M. Bakunov, V.B. Gildenburg, N. Zharova, S. N. Zhukov","doi":"10.1109/MMET.2000.888525","DOIUrl":"https://doi.org/10.1109/MMET.2000.888525","url":null,"abstract":"Propagation of an electromagnetic wave along a planar waveguiding structure containing gaseous/solid-state plasma slabs with time-varying free carrier density is considered in the case when the time-scale of density variations is much greater than the wave period. Both ionization and deionization (recombination, attachment) processes are included. General relations describing frequency shifting and energy losses of a guided wave are derived for arbitrary open/closed waveguiding structure. Adiabatic invariants, i.e., combinations of wave energy and frequency conserving in the course of temporal variations of the waveguiding medium, are found. Detailed analyses are given for surface waves guided by the boundary of a time-varying plasma half-space and a plasma slab.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115094417","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
Plane wave scattering on a reflector antenna located over an impedance plane 位于阻抗平面上的反射天线上的平面波散射
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.890468
Y. Yukhanov, A. Yukhanov
{"title":"Plane wave scattering on a reflector antenna located over an impedance plane","authors":"Y. Yukhanov, A. Yukhanov","doi":"10.1109/MMET.2000.890468","DOIUrl":"https://doi.org/10.1109/MMET.2000.890468","url":null,"abstract":"The influence of an impedance plane on the efficient surface of diffusing (radar cross-section (RCS)) of a parabolic antenna is considered in this paper. The features of diffusing are analyzed on the basis of combination of the method of physical optometrists (of physical optics) and integral equations. It is shown that due to mutual reflections from the mirror antenna and the impedance plane, the RCS can double its angular sector. The results of numerical experiments are also presented.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"361 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115900022","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
Signal compression based on zonal selection methods 基于区域选择方法的信号压缩
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.888563
W. Dziech, R. Baran, D. Wiraszka
{"title":"Signal compression based on zonal selection methods","authors":"W. Dziech, R. Baran, D. Wiraszka","doi":"10.1109/MMET.2000.888563","DOIUrl":"https://doi.org/10.1109/MMET.2000.888563","url":null,"abstract":"Compression of signals in the spectral domain consists of the rejection of related transform coefficients and reconstruction of signals by inverse transforms. There exist two basic methods used to select coefficients to be transmitted: threshold selection and zonal selection. In threshold selection the reconstruction is made with a subset of coefficients that are larger than a specified threshold. In the zonal method the reconstruction is made with a subset of coefficients lying in a predetermined zone. Only those coefficients are selected for further processing, the remaining coefficients are set to zero. In this paper, zonal compression techniques performed on chosen signals using different transforms are investigated. The mean square error (MSE) is used as a measure of signal reconstruction quality. Plots of the MSE versus compression percentage are included for comparison of methods.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115450365","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: 10
Concerning transition radiation by a relativistic electron in a thin metallic plate 关于金属薄板上的相对论性电子的跃迁辐射
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.888517
S. N. Dobrovol'sky, N. Shul'ga
{"title":"Concerning transition radiation by a relativistic electron in a thin metallic plate","authors":"S. N. Dobrovol'sky, N. Shul'ga","doi":"10.1109/MMET.2000.888517","DOIUrl":"https://doi.org/10.1109/MMET.2000.888517","url":null,"abstract":"The influence of transverse target's size on the transition radiation spectrum of a relativistic electron moving through the thin metallic plate is considered. It has been shown that significant spectrum distortion can occur in the millimeter range of waves in comparison to the case of an infinite metallic plate. This effect takes place for \"forward\" and \"backward\" radiation in both cases, i.e. for normal incidence of electron on the target as well as for oblique incidence.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"244 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124691732","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
Plane wave diffraction by the right-angled wedge coated with the thin bi-isotropic layers 平面波衍射由直角楔形包覆薄双各向同性层
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.890456
S.G. Vashtalov, O. Dotsenko
{"title":"Plane wave diffraction by the right-angled wedge coated with the thin bi-isotropic layers","authors":"S.G. Vashtalov, O. Dotsenko","doi":"10.1109/MMET.2000.890456","DOIUrl":"https://doi.org/10.1109/MMET.2000.890456","url":null,"abstract":"The diffraction problem is considered for the plane electromagnetic wave incident on a right-angled perfectly conducting wedge, whose metallic faces are coated with thin layers of the bi-isotropic materials. Generalized second-order impedance boundary conditions for a thin covering is used. We applied the Sommerfeld-Maliuzhinets (1958) integral to the spectral representation of the total electromagnetic field. The total field must satisfy the Helmholtz equation, the edge condition and the proper conditions at infinity.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122036652","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
Analysis of a loaded E-plane cross-shaped junction of rectangular waveguides 矩形波导加载e面十字结的分析
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.890483
V. Karlov
{"title":"Analysis of a loaded E-plane cross-shaped junction of rectangular waveguides","authors":"V. Karlov","doi":"10.1109/MMET.2000.890483","DOIUrl":"https://doi.org/10.1109/MMET.2000.890483","url":null,"abstract":"Using the method of overlapping regions, an electromagnetic model of an E-plane cross-shaped divider is developed. The coupling region of the cross-shaped divider includes rectangular resonance cavities. Numerical values of the scattering matrix coefficients are obtained.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126206155","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
Analysis of electromagnetic characteristics of multi-layered periodic structures with turning layers 具有转动层的多层周期结构的电磁特性分析
Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413) Pub Date : 2000-09-12 DOI: 10.1109/MMET.2000.888574
Dmitry Kokody, Sergey Prosvirnin
{"title":"Analysis of electromagnetic characteristics of multi-layered periodic structures with turning layers","authors":"Dmitry Kokody, Sergey Prosvirnin","doi":"10.1109/MMET.2000.888574","DOIUrl":"https://doi.org/10.1109/MMET.2000.888574","url":null,"abstract":"The characteristics of reflection and transmission of multi-layered double-periodic structures with C-shaped inclusions in cells are considered. The case of turning each second layer of the system by 90 degrees is researched. It loosens the dependence of the reflection and transmission operators on the polarization of an incident wave.","PeriodicalId":344401,"journal":{"name":"Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129493699","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信