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IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.最新文献

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Spectral analysis of negative refractive index metamaterials utilizing signal processing techniques and time-domain simulations 利用信号处理技术和时域模拟的负折射率超材料的光谱分析
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469612
T. Kokkinos, R. Adve, C. Sarris
{"title":"Spectral analysis of negative refractive index metamaterials utilizing signal processing techniques and time-domain simulations","authors":"T. Kokkinos, R. Adve, C. Sarris","doi":"10.1109/WCACEM.2005.1469612","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469612","url":null,"abstract":"In this paper, signal processing techniques, mostly used for the direction of arrival (DoA) estimation in smart antenna systems, are combined with time-domain simulations in order to perform dispersion analysis of negative refractive index (NRI) metamaterials. The time-domain response of infinite arrays of unit cells giving rise to NRI metamaterials is calculated using the finite difference time domain (FDTD) method together with periodic boundary conditions (PBC). Subsequently, the correlation method, the MUSIC algorithm and the matrix pencil method are applied to the FDTD results and the resonances of those structures are estimated. A comparative study of the aforementioned algorithms is performed and the advantages of the matrix pencil algorithm are pointed out.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121393741","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
Design and optimisation of an antenna array for WiMAX base stations WiMAX基站天线阵列的设计与优化
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469753
W. Mahler, F. Landstorfer
{"title":"Design and optimisation of an antenna array for WiMAX base stations","authors":"W. Mahler, F. Landstorfer","doi":"10.1109/WCACEM.2005.1469753","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469753","url":null,"abstract":"To increase the capacity and coverage in broadband data communication according to the IEEE 802.16e WiMAX standard, in intelligent base station antenna with beam- and nullsteering over a full circle is developed and optimised. In this paper a circular antenna array of 8 vertical dipoles with a feeding network is described, which provides m beams simultaneously in m directions for m subscribers with a full coverage of 360/spl deg/ around the basestation. By means of optimisation techniques it is either possible to provide a null without ambiguity in every direction, or to optimize the side lobe attenuation by calculating the amplitudes and phases of every antenna of the array. With this, detection finding or location based services are also possible.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122241707","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: 14
A new integral equation for the calculation of the internal impedance of a conductor 一种新的计算导体内阻抗的积分方程
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469588
L. Knockaert
{"title":"A new integral equation for the calculation of the internal impedance of a conductor","authors":"L. Knockaert","doi":"10.1109/WCACEM.2005.1469588","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469588","url":null,"abstract":"A new exact integral equation pertinent to the calculation of the skin effect induced internal impedance of a straight conductor, based on the correct boundary assumptions, is derived. Applied to a circular wire, it is shown that the exact internal impedance is persistently underestimated when employing classical techniques such as quasi-static approximation.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122304752","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
European effort towards a unified framework for the analysis of antenna structures 欧洲对天线结构分析统一框架的努力
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469716
G. Vandenbosch, R. Gillard, P. Kildal, S. Maci, J. Martinaud, G. Vecchi, J. Zapata
{"title":"European effort towards a unified framework for the analysis of antenna structures","authors":"G. Vandenbosch, R. Gillard, P. Kildal, S. Maci, J. Martinaud, G. Vecchi, J. Zapata","doi":"10.1109/WCACEM.2005.1469716","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469716","url":null,"abstract":"This paper gives an overview of the ongoing and planned efforts within the software integration action of ACE, the FP6 Network of Excellence of the European Union dedicated to antennas.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126108455","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
Digital joint phase and sampling instant synchronisation for UMTS standard 数字联合相位和采样即时同步UMTS标准
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469760
Y. Serrestou, K. Raoof, J. Lienard
{"title":"Digital joint phase and sampling instant synchronisation for UMTS standard","authors":"Y. Serrestou, K. Raoof, J. Lienard","doi":"10.1109/WCACEM.2005.1469760","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469760","url":null,"abstract":"In asynchronous direct-sequence code division multiple access (DS-CDMA) receivers, one of the major functions is timing and phase synchronisation. Many proposed solutions treat these functions separately. In this paper we present a new joint synchronisation solution for UMTS standard. This solution is based on a digital delay and phase looked loops. In addition this implementation is programmable for the two modes of UMTS (FDD and TDD) with variable over-sampling factor. It has tested in real time on TigerSHARC DSP.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116110230","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
Novel interpolator structure for digital symbol synchronisation 一种新的数字符号同步插补器结构
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469755
M. Kiviranta
{"title":"Novel interpolator structure for digital symbol synchronisation","authors":"M. Kiviranta","doi":"10.1109/WCACEM.2005.1469755","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469755","url":null,"abstract":"Timing adjustment in a digital modem is performed by interpolation after sampling with a fixed clock. A novel interpolator structure is proposed to avoid extrapolation problem, which arises if the fixed clock sampling rate is assumed to be equal to the nominal sampling rate of the interpolator output signal. The simulations indicate that the proposed structure works well and is superior to the conventional implementation.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124941663","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
A novel HE-coupling for explicit multigrid-FDTD 一种新的显式多网格fdtd he耦合
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469578
P. Chow, T. Yamagajo, T. Kubota, T. Namiki
{"title":"A novel HE-coupling for explicit multigrid-FDTD","authors":"P. Chow, T. Yamagajo, T. Kubota, T. Namiki","doi":"10.1109/WCACEM.2005.1469578","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469578","url":null,"abstract":"In this paper we put forward a novel coupling method that directly ties both the field variables, electric (E) and magnetic (H), in the multigrid-FDTD algorithm. Conventional leapfrog multigrid-FDTD or subgridding only directly couples one field variable between the grids, either the E or the H field, and the one that is not coupled is indirectly linked with the first by the FDTD equations. The FDTD method staggers the E and H fields. This means a strong numerical coupling for the directly connected field but only a weak coupling for the second field for multigrid-FDTD. There is nothing to prevent the weakly connected field from disengaging from each other in different grids, and if it does, it leads to instability. This can happen because there is nothing explicit that ties them together. Finally, a new and coherent approximation has been derived using the divergence and Green's theorems for the spatial derivative terms in the FDTD equations to enhance stronger coupling in multigrid-FDTD.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122862878","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
Phased array for limited coverage 有限覆盖的相控阵
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469573
H. Luh
{"title":"Phased array for limited coverage","authors":"H. Luh","doi":"10.1109/WCACEM.2005.1469573","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469573","url":null,"abstract":"The limited scan (or coverage) phased array is often used to illuminate a reflector (or lens) as the radiating aperture. Since the reflector can not capture all of the feed array energy, the antenna basically is a lossy system. In addition, it is not applicable to small antennas. The phased array to be addressed in this paper is a \"hardwired\" and \"lossless\" phased array. For simplicity purposes, the author considers a one-dimensional linear array of eight elements (for a base station antenna). A numerical example is used to illustrate the phased array design.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122921811","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
Identification of particles in complex structures from scattering data by an optimization method 用最优化方法从散射数据中识别复杂结构中的粒子
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469609
F. Seydou, T. Seppanen, O. Ramahi
{"title":"Identification of particles in complex structures from scattering data by an optimization method","authors":"F. Seydou, T. Seppanen, O. Ramahi","doi":"10.1109/WCACEM.2005.1469609","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469609","url":null,"abstract":"Multiple disjoint multilayered particles are eliminated by plane electromagnetic waves of fixed frequency. We consider the inverse problem of finding the layers and the refractive indices of the configuration. To this end, we use an optimization method that is due to Colton and Monk, arid give numerical results that show the performance of the algorithm.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131177052","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
Vectorial GO and diffraction decomposition of physical optics scattering of dipole wave from planar surfaces in terms of modified edge representation line integrals 基于修正边缘表示线积分的平面偶极子波物理光学散射矢量GO和衍射分解
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469649
L. Rodriguez, K. Sakina, M. Ando
{"title":"Vectorial GO and diffraction decomposition of physical optics scattering of dipole wave from planar surfaces in terms of modified edge representation line integrals","authors":"L. Rodriguez, K. Sakina, M. Ando","doi":"10.1109/WCACEM.2005.1469649","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469649","url":null,"abstract":"In this article, following the Young's ideas, the physical optics (PO) radiation integral of the Herztian dipole wave scattered by a planar surface, is decomposed analytically by modified edge representation (MER) Line Integrals. It is shown, for the first time, numerically and analytically that two kinds of MER line integrals, that is, along the periphery of the scatterer and around the inner stationary phase point (SPP), correspond to the diffraction and the GO field, respectively.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132721052","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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