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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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Analysis of electromagnetically coupled microstrip antennas printed on anisotropic substrates 各向异性基板上电磁耦合微带天线的分析
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.2003.1244878
V. D. Costa, I. Bianchi, J.C.S. Lacava, L. Cividanes
{"title":"Analysis of electromagnetically coupled microstrip antennas printed on anisotropic substrates","authors":"V. D. Costa, I. Bianchi, J.C.S. Lacava, L. Cividanes","doi":"10.1109/IMOC.2003.1244878","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244878","url":null,"abstract":"This paper presents a full-wave spectral-domain analysis for electromagnetically coupled microstrip antennas printed on anisotropic substrates. Working in the Fourier domain and using the symbolic derivation capability of the Mathematica/spl trade/ package, spectral Green's functions in compact and closed-form are derived. To better visualize the behavior of these functions, typical 2D and 3D graphics are presented. Rectangular patch antennas and printed dipoles are analyzed to illustrate the formulation.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"28 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":"125372736","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
Optical network optimization with transmission impairments based on genetic algorithm 基于遗传算法的传输损伤光网络优化
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.2003.1244886
Marcos A. C. Lima, A. C. César, Aluizio F. R. Araújo
{"title":"Optical network optimization with transmission impairments based on genetic algorithm","authors":"Marcos A. C. Lima, A. C. César, Aluizio F. R. Araújo","doi":"10.1109/IMOC.2003.1244886","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244886","url":null,"abstract":"We propose routing and wavelength assignment in WDM networks based on a genetic algorithm. Two transmission impairments are added to the usual set of routing constraints. They are polarization mode dispersion (PMD) and amplified spontaneous emission (ASE). Through simulation, we find substantial savings in terms of equipment cost, optimizing the placement of wavelength converters and PMD compensators. Also, the proposed technique limits the number of cascaded amplifiers and reduces the number of wavelength conversions, enhancing the optical signal quality.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"12 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":"121177306","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: 33
Realizations of microwave filters with resonating bend cad using a genetic algorithm 用遗传算法实现微波滤波器的谐振弯曲cad
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.2003.1244821
P. Jarry, H. Filho, E. Kerhervé, J. Pham, M. Lecouve, N. Boutheiller
{"title":"Realizations of microwave filters with resonating bend cad using a genetic algorithm","authors":"P. Jarry, H. Filho, E. Kerhervé, J. Pham, M. Lecouve, N. Boutheiller","doi":"10.1109/IMOC.2003.1244821","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244821","url":null,"abstract":"In space, microwave bend filters applications are often encountered. Our researches are in keeping with the general pattern of straight and curved waveguide filter structures. More particularly, evanescent modes raise a tremendous interest. An efficient VisualC++ CAD tool has been already developed on CNES behalf for these filtering straight structures at X-band. A genetic algorithm (GA) optimization completed it to carry out the filter synthesis. The accuracy of this computed mode-matching technique applied to an evanescent mode straight waveguide was confirmed by many prototypes. We proceed with the analysis of waveguide bends in order to replace dielectric insert terms. Thus, the objective of this paper is to describe an efficient and simple method to model waveguides with bends, applied to the synthesis of high power filtering structures. In this paper, we are focusing on the bend study and on the critical problem of the straight/curved waveguide discontinuity too, before the plotted results.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"206 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":"128443684","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
Optical and electrical characterisation of an p/sup +/-InAs/sub 0.96/Sb/sub 0.04//n/sup 0/-InAs/sub 0.96/Sb/sub 0.04//n/sup +/-In As photodetector for mid-infrared application 中红外应用的p/sup +/-InAs/sub 0.96/Sb/sub 0.04//n/sup 0/-InAs/sub 0.96/Sb/sub 0.04//n/sup +/ in As光电探测器的光学和电学特性
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.2003.1244836
P. Chakrabarti, A. Krier, X.L. Huang, P. Fenge, R. Lal
{"title":"Optical and electrical characterisation of an p/sup +/-InAs/sub 0.96/Sb/sub 0.04//n/sup 0/-InAs/sub 0.96/Sb/sub 0.04//n/sup +/-In As photodetector for mid-infrared application","authors":"P. Chakrabarti, A. Krier, X.L. Huang, P. Fenge, R. Lal","doi":"10.1109/IMOC.2003.1244836","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244836","url":null,"abstract":"An InAsSb p/sup +/-n junction photodetector grown on InAs substrate by liquid phase epitaxy has been modeled and characterized. The results obtained on the basis of the model are compared and contrasted with experimentally measured values. Both electrical and optical characterisation of the device has been carried out for exploring the application potential of the device in an absorption spectroscopy based gas sensors. The model enables one to explain the various mechanisms that shape the characteristics of the device under actual operating condition. It can also be used as a tool for optimizing the detector.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"18 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":"132237080","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
Study of dynamic behavior of /spl delta/-doped HMSM photodetector /spl δ /掺杂HMSM光电探测器的动态行为研究
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.2003.1244835
Xia Zhao, Hung-Jen Huang, Xiying Chen, B. Nabet, A. Cataldo, A. Cola, F. Quaranta
{"title":"Study of dynamic behavior of /spl delta/-doped HMSM photodetector","authors":"Xia Zhao, Hung-Jen Huang, Xiying Chen, B. Nabet, A. Cataldo, A. Cola, F. Quaranta","doi":"10.1109/IMOC.2003.1244835","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244835","url":null,"abstract":"We have previously reported the time response of a /spl delta/-doped heterostructure metal-semiconductor-metal photodetector (HMSM-PD) with FWHM of 11 ps for a 4 /spl mu/m finger gap device. Comparison of the /spl delta/-doped and undoped devices shows improved performance due to the /spl delta/-doping. In this paper, we simulate the device dynamics behavior using Ramo's theorem. Results show that the introduction of a /spl delta/-doping layer significantly changes the 2D potential and field profiles from horizontally oriented to vertically oriented ones due to the screening effect of the highly crowded two dimensional electron gas (2DEG) formed along the interface of the heterojunction, which reduces the carrier travel distance, hence the transit time of carriers in the device. With this knowledge, we expect to achieve high speed performance without further scaling down of the device.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"2012 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":"131110234","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
An EDFA theoretical analysis considering different configurations and pumping wavelengths 考虑不同结构和泵浦波长的EDFA理论分析
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.2003.1244840
S. Milo, R. Souza, M.B.Ce. Silva, E. Conforti, A. Bordonalli
{"title":"An EDFA theoretical analysis considering different configurations and pumping wavelengths","authors":"S. Milo, R. Souza, M.B.Ce. Silva, E. Conforti, A. Bordonalli","doi":"10.1109/IMOC.2003.1244840","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244840","url":null,"abstract":"The propagation behavior of an erbium-doped fiber amplifier parameters is theoretically analyzed in this work for different amplifier configurations and pumping wavelengths. These configurations were devised from the basic amplifier arrangement and developed to improve specific amplifier operational characteristics. By using the amplifier basic theory for pumping at 980 nm and 1480 nm, the configurations were modeled and simulated for given input boundary conditions. As a result, the longitudinal characteristics of signal, pumping, spontaneous emission, and noise figure were observed for all configurations and compared to those of the conventional amplifier. All simulations were carried out using parameters from a commercial erbium-doped fiber.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"115 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":"115320499","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: 11
3D visualization of temperature distributions induced by a cellular telephone in a model of the human head 三维可视化的温度分布引起的蜂窝电话在一个人的头部模型
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.2003.1244882
A. O. Rodrigues, J. J. Viana, L.O.C. Rodrigues, J. Vasconcelos, J. A. Ramírez, T. Green, E. Freeman
{"title":"3D visualization of temperature distributions induced by a cellular telephone in a model of the human head","authors":"A. O. Rodrigues, J. J. Viana, L.O.C. Rodrigues, J. Vasconcelos, J. A. Ramírez, T. Green, E. Freeman","doi":"10.1109/IMOC.2003.1244882","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244882","url":null,"abstract":"This paper is concerned with the three-dimensional (3D) visualization of the temperature distribution and the temperature rise in a refined model of the human head of a cellular telephone user. The human head model has a resolution of 1.86/spl times/1.11/spl times/1.11 mm and is composed of twelve different tissues. The cellular telephone is modelled as a dipole antenna, operating at 1.8 GHz and radiating powers of 120 and 600 mW. The SAR distribution and the temperature rise were calculated using the FDTD method. Differently from previous researches, a program was developed to visualize the temperature distribution and temperature rise in 3D, in different layers or in different materials of the model. 3D visualization allows a better and more natural understanding of the possible thermal effects. The device operating at 1.8 GHz, 120 and 600 mW resulted in maximum temperature rise values of 0.4/spl deg/C and 2/spl deg/C, respectively; and maximum SAR of 3.9 W/kg. These values do not exceed the safety standards.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"6 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":"123872631","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
Use of a symmetrical linear array structure to reduce mutual interference between users in a circular cell system 使用对称线性阵列结构来减少圆形小区系统中用户之间的相互干扰
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.2003.1244828
Wamberto J. L. Queiroz, F.G.S. Silva, M. Alencar
{"title":"Use of a symmetrical linear array structure to reduce mutual interference between users in a circular cell system","authors":"Wamberto J. L. Queiroz, F.G.S. Silva, M. Alencar","doi":"10.1109/IMOC.2003.1244828","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244828","url":null,"abstract":"This work shows how to use symmetrical linear antenna arrays to improve the lower bounds of the mean square value and standard deviation of the mutual interference between signal users uniformly distributed in a circular cell model. A general expression is obtained for the lower bounds to be used with excitation coefficients of design methods such as Tschebyscheff method, binomial method and a new method that uses excitation coefficients values uniformly distributed in an appropriate interval. It is shown that this new design method overcomes the classical methods and demands a lower computational effort. In both cases, the classical and the new excitation coefficients method, the array elements are distributed along the array axis provided that elements placed at the ends have the same excitation amplitude.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"744 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":"120972746","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
Patches driver on the quasi-Yagi antenna: analyses of bandwidth and radiation pattern 准八木天线的贴片驱动:带宽和辐射方向图分析
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.2003.1244877
L. Kretly, C. E. Capovilla
{"title":"Patches driver on the quasi-Yagi antenna: analyses of bandwidth and radiation pattern","authors":"L. Kretly, C. E. Capovilla","doi":"10.1109/IMOC.2003.1244877","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244877","url":null,"abstract":"This work presents the optimization of a broadband uniplanar quasi-Yagi antenna at 2.2 GHz and a novel structure, called the quasi-Yagi patch antenna, based on patches instead of a dipole as driver element. This center frequency was chosen due to wideband characteristic of the quasi-Yagi antenna to allow its operation at 1.9 GHz, GSM-USA standard, as well 2.4-2.5 GHz, 802.11 b WLAN and Bluetooth. The simulation results were obtained using FDTD (finite difference time domain method), due to great accuracy in calculating return loss, and radiation pattern. The return loss measurements indicate that the novel design is suitable for wireless communications.","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":"116398427","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: 19
A PBG-photonic band gap-static phase-shifter for steerable antenna array 一种用于可控天线阵列的pbg -光子带隙静态移相器
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.2003.1244859
L. Kretly, A. Távora
{"title":"A PBG-photonic band gap-static phase-shifter for steerable antenna array","authors":"L. Kretly, A. Távora","doi":"10.1109/IMOC.2003.1244859","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244859","url":null,"abstract":"A 4-patch CPW-FULL antenna array, fed through CPW lines with multiple UC-PBG matrices is presented in this paper. The multiple UC-PBG matrices are designed to work as phase shifters between the elements of the array. By changing the number of lines in the PBG matrix of each element it is possible to perform beam steering. The antenna structure presented here is applicable to 3G communication systems and is designed to operate at 2.45 GHz, with a beam steering step of approximately 45/spl deg/.","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":"116740737","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
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