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

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Integral equation formulation for the impedance representation of aperture-coupled devices with finite wall conductivity 有限壁电导率的孔耦合器件阻抗的积分方程表达式
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469721
M. Mattes, J. Mosig
{"title":"Integral equation formulation for the impedance representation of aperture-coupled devices with finite wall conductivity","authors":"M. Mattes, J. Mosig","doi":"10.1109/WCACEM.2005.1469721","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469721","url":null,"abstract":"Recently a method, which is based on the integral equation technique, has been proposed to compute an admittance or impedance representation of planar transitions between waveguides. Although the method provides satisfactory simulation results when compared to measurements, it does not take into account the ohmic losses due to a finite conductivity in the transition walls. In this paper, we propose a simple and easy to implement extension to this method in order to include in the impedance representation the missing ohmic losses of the waveguide junction. Though the method has been developed in the framework of waveguide devices, like filters, it is applicable to any aperture-coupled structure based on metallic surfaces with finite conductivity, e.g. slot antennas.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"87 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":"125056264","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
Computational electromagnetics applied to analyzing the efficient utilization of the RF transmission hyperspace 应用计算电磁学分析射频传输超空间的有效利用
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469769
A. Drozd, I. Kasperovich, C. E. Carroll, A.C. Blackburn
{"title":"Computational electromagnetics applied to analyzing the efficient utilization of the RF transmission hyperspace","authors":"A. Drozd, I. Kasperovich, C. E. Carroll, A.C. Blackburn","doi":"10.1109/WCACEM.2005.1469769","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469769","url":null,"abstract":"New spectrum sharing techniques for wireless systems have recently been investigated that enable the joint utilization of all orthogonal electromagnetic (EM) transmission resources, including, but not limited to rime, frequency, geographic space, modulation/code, and polarization. This multi-dimensional environment is referred to as the transmission hyperspace (TH), a term intended to convey the notion of a multi-dimensional resource space, expressed as an n-tuple, in which each dimension allows orthogonality amongst users. The challenges faced in the modeling and analysis of large-scale TH-enabled problems is presented in terms of assigning the n-tuple for the purpose of enhancing throughput. The key aspects of the TH for efficient spectrum management are discussed. The TH approach is anticipated to provide several orders of magnitude improvement in RF resource utilization and aggregate information throughput.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"54 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":"124163300","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: 38
Dual-band circularly polarized microstrip antenna 双频圆极化微带天线
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469736
Tso-Wei Li, Cheng-Liang Lai, Jwo-Shiun Sun
{"title":"Dual-band circularly polarized microstrip antenna","authors":"Tso-Wei Li, Cheng-Liang Lai, Jwo-Shiun Sun","doi":"10.1109/WCACEM.2005.1469736","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469736","url":null,"abstract":"A new dual-band circularly polarized microstrip antenna is presented experimentally. In this paper, using dual-radiator a new design dual-band antenna can be obtained. The frequency ratio of this design is flexible which more than 1.4.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"113 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":"122123935","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: 20
Dynamic and electrical analysis of MEMS capacitor with accelerated motion effects 具有加速运动效应的MEMS电容器的动力学和电学分析
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469696
K. Kawano, S. Shahrani, T. Mori, M. Kuroda, M. Tentzeris
{"title":"Dynamic and electrical analysis of MEMS capacitor with accelerated motion effects","authors":"K. Kawano, S. Shahrani, T. Mori, M. Kuroda, M. Tentzeris","doi":"10.1109/WCACEM.2005.1469696","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469696","url":null,"abstract":"MEMS technology is growing rapidly in RF field, because of the advantage over p-i-n diode or FET switches. An accurate knowledge of the electromagnetic field evolution around a moving or rotating body is very important for the design, optimization and realization of new optical devices or microwave devices, such as the RF-MEMS structures. We propose the numerical technique based on the finite-difference time-domain method with an adaptive implementation of grid generation. This simulation method is applied to the analysis of a two-dimensional MEMS variable capacitor with accelerated motions. The acceleration of the MEMS capacitor is derived under the equilibrium between the spring force and electrical force. Using this acceleration, the numerical results that express the relationship between the acceleration of the plates and the spring constant and the mass of the plates are shown.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"36 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":"131407693","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
Two-level preconditioning techniques for electromagnetic wave scattering problems 电磁波散射问题的两级预处理技术
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469692
Jeonghwa Lee, Jun Zhang, Caicheng Lu
{"title":"Two-level preconditioning techniques for electromagnetic wave scattering problems","authors":"Jeonghwa Lee, Jun Zhang, Caicheng Lu","doi":"10.1109/WCACEM.2005.1469692","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469692","url":null,"abstract":"We investigate preconditioned iterative solutions of large dense complex valued matrices arising from discretizing the hybrid integral equations of electromagnetic scattering. Due to the specific data pattern, we propose to construct two-level (TL) preconditioners to treat the conducting and dielectric parts more efficiently. The main purpose of this study is to show that the TL preconditioning is effective with the MLFMA and can reduce the number of Krylov iterations substantially by using subdivided domain of the near part matrix for each level. Our experimental results indicate that the TL preconditioning maintains the computational complexity of the MLFMA, but converges much faster, thus effectively reduces the overall simulation time for the coated material objects.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"46 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":"131423532","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
Beta test analysis of WIPL-DP WIPL-DP的Beta测试分析
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469540
S. Tabet, C. Card
{"title":"Beta test analysis of WIPL-DP","authors":"S. Tabet, C. Card","doi":"10.1109/WCACEM.2005.1469540","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469540","url":null,"abstract":"During the Beta Test (BT) phase, WIPL-D [B.M. Kolundzija et al., 2000] was parallelized for matrix fill/solution, to supplement the frequency parallelization developed in the Alpha Test (AT) phase [S. Tabet et al. April 2004]. The new WIPL-DP code was required to run on three distinct HPC platforms. The BT phase was the final testing phase of WIPL-DP5 since the IOT&E was eliminated from the requirements. WIPL-DP was successfully parallelized for frequency and matrix fill/solution. The revised code received threshold level (or better) performance rating for all critical technical parameters (CTPs) tested. The chosen test case for the BT phase was a further modification to the version used in the AT phase of the \"human head adjacent to a cellular phone\" (DEMO-531) problem. This WIPL-DP effort was funded under the common high performance computing software support initiative (CHSSI) as described in S. Tabet et al. (2004). The goal of this initiative was to provide efficient, scalable, portable software codes, algorithms, tools, models and simulations that can run on a variety of DOD high performance computing platforms that can be used by scientists and engineers to solve computing problems.","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":"125504810","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
Antennas for distributed nanosatellite networks 分布式纳米卫星网络天线
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469661
Taeko Mizuno, J.D. Roque, B. Murakami, L. Yoneshige, G. S. Shiroma, R. Miyamoto, W. Shiroma
{"title":"Antennas for distributed nanosatellite networks","authors":"Taeko Mizuno, J.D. Roque, B. Murakami, L. Yoneshige, G. S. Shiroma, R. Miyamoto, W. Shiroma","doi":"10.1109/WCACEM.2005.1469661","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469661","url":null,"abstract":"Distributed nanosatellite networks have the advantage of being reconfigurable, redundant, and readily deployable. Two types of antennas designed for this application are presented: a flexible UHF antenna for Earth-to-satellite communications, and an X-band retrodirective array for secure satellite-to-satellite crosslink communications.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"134 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":"124643397","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: 17
Parallel ICCG solvers for a finite-element eddy-current analysis on heterogeneous parallel computation environment 异构并行计算环境下有限元涡流分析的并行ICCG求解方法
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469673
T. Iwashita, M. Shimasaki, Junwei Lu
{"title":"Parallel ICCG solvers for a finite-element eddy-current analysis on heterogeneous parallel computation environment","authors":"T. Iwashita, M. Shimasaki, Junwei Lu","doi":"10.1109/WCACEM.2005.1469673","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469673","url":null,"abstract":"This paper investigates fast electromagnetic field analysis on parallel computers mutually integrated by means of grid computing technology. To utilize the heterogeneous parallel computation environment, we introduce four parallelized ICCG solvers: the block ICCG, load-balanced block ICCG, algebraic block red-black ordering, and recursive reordering methods. These solvers are evaluated in a finite edge-element eddy-current analysis on integrated parallel computers.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"83 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":"116631163","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 wide-band 0.5 /spl mu/m CMOS low-noise amplifier 一种宽带0.5 /spl μ m CMOS低噪声放大器
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469699
I. Lo, D. Yo, Ken Cheung, V.M. Lubecke, O. Boric-Lubecke
{"title":"A wide-band 0.5 /spl mu/m CMOS low-noise amplifier","authors":"I. Lo, D. Yo, Ken Cheung, V.M. Lubecke, O. Boric-Lubecke","doi":"10.1109/WCACEM.2005.1469699","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469699","url":null,"abstract":"A wide-band low-noise amplifier designed in 0.5 /spl mu/m CMOS process is discussed in this paper. Simulation results show that this low-noise amplifier is able to achieve a very wide bandwidth from 70 MHz to 1.6 GHz, with the maximum gain of 12.4 dB, and NF below 2 dB. In addition, compared to other known CMOS wide-band topologies, this low-noise amplifier has a better linearity with its 1 dB compression point at 0.5 dBm.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"109 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120841969","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 study of non-uniform meandered and fork-type grounded antenna using iterative method 非均匀弯曲叉型接地天线的迭代研究
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005. Pub Date : 2005-04-03 DOI: 10.1109/WCACEM.2005.1469744
H. Zairi, A. Gharsallah, M. Glaoui, L. Desclos
{"title":"A study of non-uniform meandered and fork-type grounded antenna using iterative method","authors":"H. Zairi, A. Gharsallah, M. Glaoui, L. Desclos","doi":"10.1109/WCACEM.2005.1469744","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469744","url":null,"abstract":"En efficient iterative method is used to characterize a printed microstrip antenna which is designed for triple-band operations at 900 MHz, 1800 MHz, and 2450 MHz bands. The numerical results demonstrated the attractive bandwidth and radiation performance of the proposed structure.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"17 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":"116455936","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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