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2007 International Conference on Electromagnetics in Advanced Applications最新文献

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Scattering by a DNG Wedge DNG楔形的散射
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387240
V. Daniele, P. Uslenghi
{"title":"Scattering by a DNG Wedge","authors":"V. Daniele, P. Uslenghi","doi":"10.1109/ICEAA.2007.4387240","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387240","url":null,"abstract":"The scattering of a plane electromagnetic wave by a double-negative (DNG) metamaterial wedge of arbitrary aperture angle is considered, in the frequency domain. The boundary-value problem is solved by separation of variables, and the modal expansion coefficients are determined as residues of a suitable meromorphic function.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127443315","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: 4
Fast Numerical Analysis of Finite Arrays of Antennas in Finite Dielectric Volumes 有限介电体积中天线有限阵列的快速数值分析
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387367
C. Craeye, X. Dardenne
{"title":"Fast Numerical Analysis of Finite Arrays of Antennas in Finite Dielectric Volumes","authors":"C. Craeye, X. Dardenne","doi":"10.1109/ICEAA.2007.4387367","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387367","url":null,"abstract":"This paper presents a formulation for the fast analysis of finite arrays of antennas embedded in finite dielectric volumes. The Method of Moments system of equations is reduced with the help of a Macro Basis Functions approach; this reduction is accelerated with the help of a multipole formulation. Fast pattern evalulation is carried out with the help of a FFT-based approach. Comparisons with full-wave solutions are shown for broadband dipoles embedded in dielectric spheres.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"716 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125971076","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: 6
Application of Lévy Mutation Operator in Evolutionary Programming Optimization of Antennas l<s:1>变异算子在天线进化规划优化中的应用
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387269
A. Hoorfar, S. Lakhani, V. Jamnejad
{"title":"Application of Lévy Mutation Operator in Evolutionary Programming Optimization of Antennas","authors":"A. Hoorfar, S. Lakhani, V. Jamnejad","doi":"10.1109/ICEAA.2007.4387269","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387269","url":null,"abstract":"In this paper, we discuss the implementation of Evolutionary Programming (EP) using a mutation operator based on Levy probability distribution and investigate its performance in optimization of selected antenna problems. Since the shape-parameter, alpha, in the Levy distribution results in Cauchy and Gaussian distributions for values of 1 and 2, respectively, one can design adaptive schemes that dynamically change the shape of Levy distribution in generation of offsprings during the evolutionary process in order to exploit the desirable properties of these two distributions. In particular, we introduce a simple adaptive scheme and compare its performance in antenna optimization to adaptive and non-adaptive schemes, previously reported in the literature.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125917700","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: 8
Analysis and Design of a Broadband Circular Switched Parasitic Array above finite plate and finite plate with skirt 有限板上和带裙板的宽带圆形开关寄生阵列的分析与设计
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387405
S. Panagiotou, T. D. Dimousios, C. Capsalis
{"title":"Analysis and Design of a Broadband Circular Switched Parasitic Array above finite plate and finite plate with skirt","authors":"S. Panagiotou, T. D. Dimousios, C. Capsalis","doi":"10.1109/ICEAA.2007.4387405","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387405","url":null,"abstract":"The circular switched parasitic array (CSPA) is a smart antenna system promising to play an important role in mobile systems manufacturing. In this paper, an effort to optimize the overall structure of a five-element monopole CSPA above a square wire grid plate in order to form a desired radiation pattern and achieve impedance bandwidth at the V UHF band is carried out utilizing the genetic algorithms (GA) optimization technique. The resulting configuration is then compared with the same monopole array placed above a wire grid plate with skirt.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126976036","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
The Coupling of Perfectly Conducting and Impedance Coaxial Waveguides 完美导电与阻抗同轴波导的耦合
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387385
A. Biiyiikaksoy, L. Hakki Tayyar, F. Hacivelioğlu, G. Uzgoren
{"title":"The Coupling of Perfectly Conducting and Impedance Coaxial Waveguides","authors":"A. Biiyiikaksoy, L. Hakki Tayyar, F. Hacivelioğlu, G. Uzgoren","doi":"10.1109/ICEAA.2007.4387385","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387385","url":null,"abstract":"In the present work a matrix Wiener-Hopf equation connected with the scattering of the dominant TEM mode at the junction of a two-part coaxial waveguide is solved and the influence of the inner and outer cylinders radii and the surface impedances on the reflection and transmission coefficients are presented.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124849073","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
Utilization of target diffraction to measure a high electromagnetic field 利用靶衍射测量高电磁场
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387420
S. Vauchamp, M. Lalande, J. Andrieu, B. Jecko, J. Lasserre, A. Paupert, G. Teyssidou, R. Pouzalgues
{"title":"Utilization of target diffraction to measure a high electromagnetic field","authors":"S. Vauchamp, M. Lalande, J. Andrieu, B. Jecko, J. Lasserre, A. Paupert, G. Teyssidou, R. Pouzalgues","doi":"10.1109/ICEAA.2007.4387420","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387420","url":null,"abstract":"XLIM, French research institute based at the University of Limoges, develops a patented project which is called \"Michelson project\". The objective of this study is to measure a high electromagnetic field in a selected location by using the diffraction of a target. To realize this measurement, a target, a receiving antenna and a system of acquisition are needed. This method allows to measure high electromagnetic field without risk of receiving antenna breakdown, and disturbs less the field in the zone of the measurement, because no cables are used and the dimensions of the target are small. According to the source and so according to the chosen receiving antenna, the Michelson method can measure as well harmonic signals as transient signals.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123765404","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
Theoretical contributions concerning biophysical mechanisms of interaction between external millimeter wave electromagnetic field and living biological systems 对外部毫米波电磁场与生物系统相互作用的生物物理机制的理论贡献
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387488
A. Rotaru, N. Ciobanu, D. B. Rusu, O. V. Betskii, D. Ghitu
{"title":"Theoretical contributions concerning biophysical mechanisms of interaction between external millimeter wave electromagnetic field and living biological systems","authors":"A. Rotaru, N. Ciobanu, D. B. Rusu, O. V. Betskii, D. Ghitu","doi":"10.1109/ICEAA.2007.4387488","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387488","url":null,"abstract":"In the present, the study of millimeter waves interaction with living biological systems represent one of the most dynamic field of modern biophysics because of well known using of EHF EMF (extremely high-frequency electromagnetic field) athermal biological effects in biology, medicine and agriculture (mostly in former USSR territory). Despite the huge number of the scientific works on this problem, both experimental and theoretical, nevertheless the generation physiological and physical mechanisms of experimentally observed athermal biological effects and also the pathway interaction or physical behavior phenomenology of millimeter waves in strong anisotropic mediums, like living biological organisms, are still unclear. In this paperwork, we propose a new generation and interaction mechanism between millimeter waves and living biological systems, based on the Frohlich Hypothesis, respectively through coherent phonons formation.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121991887","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
Design of Multiple Antennas at 5 GHz for Mobile Phone and its MIMO Performances 手机5ghz多天线设计及其MIMO性能研究
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387227
S. Vergerio, M. Elayachi, J. Rossi, P. Brachat
{"title":"Design of Multiple Antennas at 5 GHz for Mobile Phone and its MIMO Performances","authors":"S. Vergerio, M. Elayachi, J. Rossi, P. Brachat","doi":"10.1109/ICEAA.2007.4387227","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387227","url":null,"abstract":"MIMO systems require the implementation of multiple antennas at the mobile well adapted in both electromagnetic performances and decorrelation. We propose here a design of two PIFA elements working in the 4.7-6.2 GHz band and placed in orthogonal or in parallel configuration on a ground plane whose dimensions are compatible with a mobile phone. Its characteristics are suitable for MIMO applications. We have simulated the MIMO capacity in outdoor and in indoor environments with a geometrical propagation model based on measurements. The best capacity was found in a NLOS environment and for the antenna in orthogonal configuration which has a radiation pattern predominant in the vertical plane.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123261711","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
Analytic Properties of a Class of Hyperboloidal Beams in Nearly-Spheroidal Fabry-Perot Optical Cavities 近球面法布里-珀罗光学腔中一类双曲光束的解析性质
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387237
V. Galdi, G. Castaldi, V. Pierro, I. Pinto, J. Agresti, R. DeSalvo
{"title":"Analytic Properties of a Class of Hyperboloidal Beams in Nearly-Spheroidal Fabry-Perot Optical Cavities","authors":"V. Galdi, G. Castaldi, V. Pierro, I. Pinto, J. Agresti, R. DeSalvo","doi":"10.1109/ICEAA.2007.4387237","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387237","url":null,"abstract":"This paper deals with a study of the analytic structure and properties of a family of \"hyperboloidal\" beams (HBs) which spans from the standard Gaussian-beam configuration to \"flat-top\" beam configurations of interest for low-thermal-noise optical cavities for gravitational interferometry. In this connection, starting from a Gauss-Laguerre-type representation, a generalized duality relation (involving fractional Fourier transform operators of complex order) between two generic HBs is derived.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123543219","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
Design of Long-Period Grating Couplers Based on Asymmetric Dual-Core Fibres 基于非对称双芯光纤的长周期光栅耦合器设计
2007 International Conference on Electromagnetics in Advanced Applications Pub Date : 2007-11-21 DOI: 10.1109/ICEAA.2007.4387437
F. Chan, K. Yasumoto
{"title":"Design of Long-Period Grating Couplers Based on Asymmetric Dual-Core Fibres","authors":"F. Chan, K. Yasumoto","doi":"10.1109/ICEAA.2007.4387437","DOIUrl":"https://doi.org/10.1109/ICEAA.2007.4387437","url":null,"abstract":"We demonstrate a grating coupler using an asymmetric dual-core fibre with a pair of long-period gratings (LPGs). Simple formulas for the achievement of high coupling efficiency are derived and the results are compared with reported LPG couplers based on two discrete fibres. Our results show that with a proper choice of grating parameters, the coupling efficiency reaches 100%. A passing band with steep band transitions and side lobes less than ~25 dB can be achieved.","PeriodicalId":273595,"journal":{"name":"2007 International Conference on Electromagnetics in Advanced Applications","volume":"6 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131837098","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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