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Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)最新文献

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Novel heterostructure MSM photodetectors for Gigabit Ethernet 用于千兆以太网的新型异质结构MSM光电探测器
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244834
A. Cola, B. Nabet, X. Chen, F. Quaranta, A. Cataldo, M. Lomascolo, A. Taurino, M. Currie
{"title":"Novel heterostructure MSM photodetectors for Gigabit Ethernet","authors":"A. Cola, B. Nabet, X. Chen, F. Quaranta, A. Cataldo, M. Lomascolo, A. Taurino, M. Currie","doi":"10.1109/IMOC.2003.1244834","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244834","url":null,"abstract":"A key element in the field of sensors for short haul communications is the development of high performance photodetectors. Along this direction, we present here an accurate investigation of photodetectors based on AlGaAs/GaAs heterojunction structures. In these devices, the absorption region is in the GaAs layer where is formed, at the interface with AlGaAs, a two-dimensional electron gas (2-DEG). This HMSM (heterostructure metal-semiconductor-metal) photodetector contains an AlGaAs distributed Bragg reflector for detection at 850 nm. The beneficial effect of the 2-DEG in the GaAs absorption layer is evidenced by comparing samples with and without doping in the AlGaAs layer. We start from properties of the grown structure, and then we investigate the static and dynamic properties. Particularly, photocurrent spectra exhibit a 30 nm wide peak at 850 nm, while time response measurements give a bandwidth over 30 GHz. A combination of very low dark current and capacitance, fast response, wavelength selectivity, and compatibility with high electron mobility transistors makes this device especially suitable for Gigabit Ethernet applications.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128113660","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
Photonic crystal fibers 光子晶体光纤
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244868
J. Lægsgaard, Hansen P Kim, M. Nielsen, T. Hansen, J. Riishede, K. Hougaard, T. Sørensen, T. Larsen, N. Mortensen, J. Broeng, J. B. Jensen, A. Bjarklev
{"title":"Photonic crystal fibers","authors":"J. Lægsgaard, Hansen P Kim, M. Nielsen, T. Hansen, J. Riishede, K. Hougaard, T. Sørensen, T. Larsen, N. Mortensen, J. Broeng, J. B. Jensen, A. Bjarklev","doi":"10.1109/IMOC.2003.1244868","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244868","url":null,"abstract":"Photonic crystal fibers having a complex microstructure in the transverse plane constitute a new and promising class of optical fibers. Such fibers can either guide light through total internal reflection or the photonic bandgap effect, In this paper, we review the different types and applications of photonic crystal fibers with particular emphasis on recent advances in the field.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129294246","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: 303
The influence of the height variation on the frequency bandgap in an AMC, artificial magnetic conductor, for wireless applications: an EM experimental design approach 高度变化对无线应用的人工磁性导体频率带隙的影响:一种电磁实验设计方法
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244861
L. Kretly, A.M.P.A. Silva
{"title":"The influence of the height variation on the frequency bandgap in an AMC, artificial magnetic conductor, for wireless applications: an EM experimental design approach","authors":"L. Kretly, A.M.P.A. Silva","doi":"10.1109/IMOC.2003.1244861","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244861","url":null,"abstract":"This work presents the effect of the height variation of an AMC, artificial magnetic conductor. The AMC is a metal-dielectric structure which has a high surface impedance inside a forbidden frequency band. The prototype for this work is first designed to have a bandgap around 1.9 GHz. The variation of the structure height allows a dislocation on the resonance frequency and the forbidden frequency band, bandgap, as is shown in the measured results. The experimental design approach is based on simple EM formulation.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131423521","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
Hertz vector potential analysis of FSS on anisotropic substrates 各向异性基片上FSS的赫兹矢量电位分析
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244906
A. Campos, A. D’assunção
{"title":"Hertz vector potential analysis of FSS on anisotropic substrates","authors":"A. Campos, A. D’assunção","doi":"10.1109/IMOC.2003.1244906","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244906","url":null,"abstract":"This work presents an analytical determination of the dyadic Green's function for frequency selective surfaces (FSS) on anisotropic dielectric layers. The structure analyzed is composed of a periodic array of conducting patch elements. Results are obtained for the reflected power by using the moment method combined with the Hertz vector potential method. Curves for the reflected power versus frequency are presented as a function of the structural parameters, assuming that the optical axis in the anisotropic substrate is oriented along the FSS conducting patch array main axes.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123009823","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: 9
A novel antenna array based on quasi-Yagi element for adaptive wireless system applications 一种基于准八木元的自适应无线系统天线阵列
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244876
L. Kretly, C. E. Capovilla, S. Barbin
{"title":"A novel antenna array based on quasi-Yagi element for adaptive wireless system applications","authors":"L. Kretly, C. E. Capovilla, S. Barbin","doi":"10.1109/IMOC.2003.1244876","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244876","url":null,"abstract":"This work presents the design and performance characteristics of a novel antenna array structure. The prototype is composed by three equal quasi-Yagi antennas 120/spl deg/ shifted, due to this new layout to allow the configuration of the radiation pattern, forming directional patterns with high directivity, and keeping the same performance as the isolated element has in band terms. The array was designed for working at 2.4 GHz and optimized to include 1.9 GHz, GSM-USA standard. The simulation and design optimization were done by a commercial software using MoM (moment method). There is an acceptable agreement between the simulation and measured results of return loss of the array.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123306446","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: 15
Tunable RF MEMS microinductors for future communication systems 用于未来通信系统的可调谐射频MEMS微电感器
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244918
C. Tassetti, G. Lissorgues, J. Gilles
{"title":"Tunable RF MEMS microinductors for future communication systems","authors":"C. Tassetti, G. Lissorgues, J. Gilles","doi":"10.1109/IMOC.2003.1244918","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244918","url":null,"abstract":"Tunable microinductors; can be designed controlling the magnetic coupling coefficient. This paper presents the design and fabrication of a new tunable RF MEMS microinductor. This component requires electrostatic actuators to control the inductance value. We report a 50% inductance variation from 1.5 to 5GHz measured on test wafers. A method to compute the inductance variation due to the mechanical displacement is briefly described. A compact lumped element model, based on the geometry, gives results in good agreement with measurements in the RF frequency range.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114878932","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: 12
ADE omnidirectional dual reflector antennas ADE全向双反射面天线
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244890
J. Bergmann, F. Moreira
{"title":"ADE omnidirectional dual reflector antennas","authors":"J. Bergmann, F. Moreira","doi":"10.1109/IMOC.2003.1244890","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244890","url":null,"abstract":"In this work an axially-displaced-ellipse (ADE) dual-reflector antenna is suggested for the achievement of an omnidirectional coverage. Its geometry is briefly presented and some relevant features are compared against previously suggested reflector antennas, designed for the same purpose. The present antenna configuration is capable of yielding the desired aperture illumination with relatively smaller reflector dimensions, providing a compact arrangement suited for use at the base station of point-to-multi-point radio links. Numerical simulations are presented to illustrate the usefulness of the proposed reflector antenna.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117258697","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
A simple numerical method for the calculation of temperature coefficient of resonant frequency of dielectric ring loaded cavity 一种计算介电环加载腔谐振频率温度系数的简单数值方法
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244899
M. Mohammad‐Taheri
{"title":"A simple numerical method for the calculation of temperature coefficient of resonant frequency of dielectric ring loaded cavity","authors":"M. Mohammad‐Taheri","doi":"10.1109/IMOC.2003.1244899","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244899","url":null,"abstract":"A precise numerical method is presented for calculation of the temperature coefficient of a dielectric ring placed coaxially in a cylindrical waveguide cavity. In this method, a simple but general and flexible method based on the first degree finite element basic function is used to calculate resonant frequency variations due to various parameters of resonators. Using this method, the quality factor of the resonator can also be easily calculated.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126024475","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
Multilayer microstrip loop directional filter 多层微带环形定向滤波器
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244826
S. Uysal
{"title":"Multilayer microstrip loop directional filter","authors":"S. Uysal","doi":"10.1109/IMOC.2003.1244826","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244826","url":null,"abstract":"A three-section loop directional filter on duroid-alumina substrates is successfully designed for a 3.5% bandwidth at 6 GHz with less than 4 dB insertion loss. It is seen that compact filters with steep roll-off and low insertion loss can be obtained with the multilayer approach.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128694097","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
A general and robust method for multi-criteria design of microwave oscillators using an evolutionary strategy 基于进化策略的微波振荡器多准则设计的通用鲁棒方法
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244846
L. Brito, P. D. de Carvalho
{"title":"A general and robust method for multi-criteria design of microwave oscillators using an evolutionary strategy","authors":"L. Brito, P. D. de Carvalho","doi":"10.1109/IMOC.2003.1244846","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244846","url":null,"abstract":"This paper describes a general and robust method applied to the optimization of microwave oscillators. This method is a combination of the harmonic balance method, the device-line measurement technique and a multi-objective evolutionary optimizer. The importance of using proper harmonic loads is considered. An example shows that the multi-objective evolutionary algorithm allows the robust exploitation of the trade-off curve of the figures of merit of the oscillator.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121444030","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
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