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1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings最新文献

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Simulation of power control in CDMA cellular system CDMA蜂窝系统功率控制仿真
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.646848
Hao Wuyang, Feng Zhenghe
{"title":"Simulation of power control in CDMA cellular system","authors":"Hao Wuyang, Feng Zhenghe","doi":"10.1109/SBMOMO.1997.646848","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.646848","url":null,"abstract":"Power control in CDMA cellular system is analyzed in detail in this paper. It is well known that power control plays a very important role in CDMA cellular systems. When a mobile subscriber rambles in the cell, especially when very close to the border, the realization of power control is practically based on the result of the detection of pilot signal power, rather than the distance used in the previous analyses. An investigation of this effect is made and results are given in this paper.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"41 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126182100","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 educational software for small signal microwave amplifier design 小信号微波放大器设计教育软件
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.646797
I.R. Borgers, L. Bermudez, P. D. de Carvalho
{"title":"An educational software for small signal microwave amplifier design","authors":"I.R. Borgers, L. Bermudez, P. D. de Carvalho","doi":"10.1109/SBMOMO.1997.646797","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.646797","url":null,"abstract":"This paper describes a new software for solid state microwave amplifier design. The software has been developed for a PC Windows environment with the Borland C++ programming language and using object oriented techniques. All steps of the design of small signal microwave amplifier are supervised by this extensible software: transistor choice, gain and noise analysis, single and multiple frequencies matching, lumped elements and hybrid microstrip and stripline circuit design, and biasing circuits for FET and bipolar transistors. Many kinds of graphics and data files are available for amplifier analysis: transistor s2p data file, input and output constant gain circles for single and multiple frequencies, maximum gain, input and output stability circles, output gain and scattering parameters graphics.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126854224","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
Measurements of chirp and linewidth enhancement factor of DFB semiconductor lasers using a self-homodyne interferometric system 用自同差干涉系统测量DFB半导体激光器的啁啾和线宽增强系数
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.646904
A. Saavedra, R. Passy, J. P. von der Weid, E. Manganote, A. Bordeaux
{"title":"Measurements of chirp and linewidth enhancement factor of DFB semiconductor lasers using a self-homodyne interferometric system","authors":"A. Saavedra, R. Passy, J. P. von der Weid, E. Manganote, A. Bordeaux","doi":"10.1109/SBMOMO.1997.646904","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.646904","url":null,"abstract":"A self-homodyne interferometric optical system fed by a modulated DFB semiconductor laser is used to obtain the AM and FM response, the chirp parameter and the linewidth enhancement factor of these lasers. Three different DFB lasers were measured and the results are in good agreement with those obtained by others techniques. The knowledge of these lasers characteristics are important in high-performance optical communications systems, to improve the FM response, the transmission data rates, predict channel densities and reduce crosstalk.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121967377","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
Some experimental results for the head/hand effects in personal communications 个人交流中头/手效应的一些实验结果
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.646849
A. Neto, J. Nogueira de Carvalho, J. Costa e Silva
{"title":"Some experimental results for the head/hand effects in personal communications","authors":"A. Neto, J. Nogueira de Carvalho, J. Costa e Silva","doi":"10.1109/SBMOMO.1997.646849","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.646849","url":null,"abstract":"In this work, some experimental results for the head/hand effects in personal communications are presented, for the real situation of a person during a call in the AMPS system. The hand-held unit has a monopole antenna. A simple measurement procedure is described and experimental results are discussed including biological effect aspects and wireless communication system performance. The experimental procedure and obtained results instigate other researchers to persue a better characterization of the head/hand-handset interaction in personal communication systems.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116841232","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
Integrated active antennas on silicon 硅上集成有源天线
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.646862
E. Biebl
{"title":"Integrated active antennas on silicon","authors":"E. Biebl","doi":"10.1109/SBMOMO.1997.646862","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.646862","url":null,"abstract":"Integrated active antennas have been designed, fabricated, and used as low-cost front-ends for sensor and communication applications in the frequency bands around 61 and 76.5 GHz allocated for industrial and vehicular applications. The active antenna concept, i.e. the spatial integration of antenna and active element, results in minimization of the required chip size, high reproducibility, and, thus, low costs. The design of active millimeter wave antennas with respect to the impedance matching of antenna and active element as well as the radiation characteristics is discussed. The fabrication process on high resistivity silicon substrates is presented. Application of these front-ends in radar and communication systems is demonstrated.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129872556","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
A reflector antenna synthesis for proposed Brasilsat B3 South American coverage at C and Ku-bands 巴西卫星B3在C和ku波段南美覆盖的反射器天线综合
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.648815
J. Bergmann, F. Hasselmann
{"title":"A reflector antenna synthesis for proposed Brasilsat B3 South American coverage at C and Ku-bands","authors":"J. Bergmann, F. Hasselmann","doi":"10.1109/SBMOMO.1997.648815","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.648815","url":null,"abstract":"A shaped reflector antenna synthesis, making, use of physical-optics diffraction in conjunction with a pseudospline global description of the reflector surface is presented for the proposed C and Ku-bands coverage of the South American territory by BRASILSAT B3 satellite. Unique features of the synthesis technique are shown to substantially reduce the computational effort to attend specified main and exterior bounds of coverage areas at two frequencies of the chosen band of operation simultaneously.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128627865","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
Complete nomenclature of symmetrical electromagnetic two-ports with gyrotropic media 具有旋向介质的对称电磁双端口的完全命名
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.646795
V. A. Dmitriyev
{"title":"Complete nomenclature of symmetrical electromagnetic two-ports with gyrotropic media","authors":"V. A. Dmitriyev","doi":"10.1109/SBMOMO.1997.646795","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.646795","url":null,"abstract":"By using formalism of the point magnetic groups, eight possible scattering matrices of symmetrical two-ports with gyrotropic media are obtained. The magnetic groups of symmetry which generate these matrices are defined. The properties of the two-ports and possibilities of the realization of some electromagnetic functions on the basis of such two-ports are discussed.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"2009 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125592404","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
OTDM quasi-all-optical demultiplexing techniques comparative analysis OTDM准全光解复用技术比较分析
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.648864
M. Mosso, W. Ruziscka, F. Souto Da Silva, C.F. Castanheira Da Silva
{"title":"OTDM quasi-all-optical demultiplexing techniques comparative analysis","authors":"M. Mosso, W. Ruziscka, F. Souto Da Silva, C.F. Castanheira Da Silva","doi":"10.1109/SBMOMO.1997.648864","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.648864","url":null,"abstract":"This work compares recently developed demultiplexing OTDM techniques that use constructive and destructive interference approaches for channels switching. The techniques under analysis are the Mach-Zehnder Interferometer (MZI) and some of those operating in the fiber non-linear region, i.e.: Non-Linear-Optical Mirror (NOLM) Terahertz Optical Asymmetric Demultiplexer (TOAD) and Four Wave Mixing (FWM). The parameters used for comparison are the switching pulse power and temporal width, and the devices physical dimensions. It is shown that the TOAD offers the most advantageous results.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132058736","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
Electromagnetic wave propagation in general multimode waveguide structures exhibiting simultaneously attenuation, dispersion and coupling phenomena 电磁波在一般多模波导结构中的传播同时表现出衰减、色散和耦合现象
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.648822
R. Vacek
{"title":"Electromagnetic wave propagation in general multimode waveguide structures exhibiting simultaneously attenuation, dispersion and coupling phenomena","authors":"R. Vacek","doi":"10.1109/SBMOMO.1997.648822","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.648822","url":null,"abstract":"A power flow equation describing the power flow of electromagnetic waves in a real multimode waveguide represented by a linear multichannel transmission system exhibiting an attenuation, dispersion, and an interchannel interaction is solved in three iterative ways. In the case of constant attenuation and constant propagation velocities in all channels and for the convolution interchannel interaction, a closed analytical solution of the problem is presented. Interesting forms of the solution, transfer function, and impulse response of the system which enable us to separate and compare the attenuation, dispersion, and coupling effects independently of each other are derived. The transfer function, the impulse response, and excitation conditions for their measurements are further discussed. Relations which make it possible to compare different experimental data obtained under specific excitation conditions in various laboratories are determined. Finally, a linear system with memory at time is studied and it is shown that the real multimode waveguide as a linear multichannel transmission system can be considered as a general linear system with memory at space.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132064581","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
New method of computation of electrical Y-matrix for arbitrary connected multielements SAW devices 提出了一种计算任意连接多单元SAW器件电性y矩阵的新方法
1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings Pub Date : 1997-08-11 DOI: 10.1109/SBMOMO.1997.646837
S. Balashov, R. C. Pinto, C. M. Cabreira, C. Finardi
{"title":"New method of computation of electrical Y-matrix for arbitrary connected multielements SAW devices","authors":"S. Balashov, R. C. Pinto, C. M. Cabreira, C. Finardi","doi":"10.1109/SBMOMO.1997.646837","DOIUrl":"https://doi.org/10.1109/SBMOMO.1997.646837","url":null,"abstract":"We treat SAW devices as an arbitrary multielement system. To describe this system, modified form of chain matrix (E-matrix) is introduced. E-matrix has a propriety of turning the calculation of the transfer matrix of this system into a simple multiplication procedure. This allows to perform computation of electrical response of almost any type of SAW device, since the total transfer matrix could be reduced into a Y-matrix. Examples and simulation results confirming method described are shown.","PeriodicalId":377339,"journal":{"name":"1997 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. 'Linking to the Next Century'. Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130061139","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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