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Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference最新文献

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Site shielding and other interference reduction strategies in COST 235 成本235中的场地屏蔽和其他减少干扰的策略
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509607
M. Al-Nuaimi
{"title":"Site shielding and other interference reduction strategies in COST 235","authors":"M. Al-Nuaimi","doi":"10.1109/SBMOMO.1995.509607","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509607","url":null,"abstract":"The paper presents topic areas in the form of ten questions formulated at the start of COST Project 235 which have been investigated by Working Group 3. Many of the problems identified have received in-depth studies analytically and experimentally. The paper outlines the significant progress achieved in the formulation of a generalised site shielding procedure and more generally in the modelling of urban radiowave propagation for use in radio system planning and coordination.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134644882","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
Time domain analysis of a through hole via with time dependent skin effect model 用随时间的集肤效应模型分析通孔的时域
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509728
Xiao-Ding Cai, G. Costache
{"title":"Time domain analysis of a through hole via with time dependent skin effect model","authors":"Xiao-Ding Cai, G. Costache","doi":"10.1109/SBMOMO.1995.509728","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509728","url":null,"abstract":"This paper presents a transient simulation of a through hole via connecting transmission lines on both sides of a printed circuit board. The via is modeled by a lumped RLC equivalent circuit that takes into account the skin effect in the cylindrical conductor. In the analysis of the transmission line part, a new skin effect model accounting for the time dependent losses is included. A mathematical interface is established between discrete time domain solutions and a lumped element RLC circuit. Numerical results show reasonable response due to the through hole via.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122221717","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
Accurate evaluation of the electric fields generated for microwave hyperthermia 精确评估微波热疗产生的电场
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509609
S. Marchetti
{"title":"Accurate evaluation of the electric fields generated for microwave hyperthermia","authors":"S. Marchetti","doi":"10.1109/SBMOMO.1995.509609","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509609","url":null,"abstract":"The article presents original formulations of the E-fields generated by a vertical dipole immersed in a dissipative medium. From the latter the E-fields generated by a vertical interstitial antenna in the surrounding medium can be descended with almost analytic accuracy. This allows fast evaluation of the injected power distributions versus frequency, medium parameters and antenna geometry. The result is of major interest in applications such as the microwave hyperthermia that is a reliable technique in the therapy of localised tumours.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126019656","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
Thermal CAD for power III-V devices and MMICs 用于电源III-V器件和mmic的热CAD
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509645
F. Bonani, G. Ghione, M. Pirola, C. Naldi
{"title":"Thermal CAD for power III-V devices and MMICs","authors":"F. Bonani, G. Ghione, M. Pirola, C. Naldi","doi":"10.1109/SBMOMO.1995.509645","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509645","url":null,"abstract":"A CAD approach (using a hybrid finite-element Green's function strategy) is described for the thermal analysis of GaAs and III-V compound semiconductor devices and integrated circuits. The approach is based on a computationally efficient 3D large-scale thermal simulator allowing for non-linear multilayered and thinned substrates, via holes, and heat conduction through surface metallizations. Simulation examples concerning devices and circuits are discussed to demonstrate the simulator capabilities.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126097134","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
An improved model for the GaAs HBT frequency performance under optical illumination 光学照明下GaAs HBT频率性能的改进模型
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509712
A. de Salles, G.G. Larangeira
{"title":"An improved model for the GaAs HBT frequency performance under optical illumination","authors":"A. de Salles, G.G. Larangeira","doi":"10.1109/SBMOMO.1995.509712","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509712","url":null,"abstract":"The theory and model for the GaAs heterojunction bipolar transistor (HBT) frequency performance under optical illumination are described. Photons absorbed in the base-collector depletion region, as well as those absorbed in the neutral base and collector regions are taken into account. The relative importance of these effects and their frequency performance are studied and estimations of the high-frequency photoresponse using PSPICE circuit simulations are shown.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124903498","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
Estimation of the parameters of a rain cell model from attenuation measurements in converging terrestrial links 从收敛地面链路的衰减测量估计一个雨单体模型的参数
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509676
E. Costa, L. S. Silva Mello, G. L. Siqueira, N. Dhein, C. M. Einloft
{"title":"Estimation of the parameters of a rain cell model from attenuation measurements in converging terrestrial links","authors":"E. Costa, L. S. Silva Mello, G. L. Siqueira, N. Dhein, C. M. Einloft","doi":"10.1109/SBMOMO.1995.509676","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509676","url":null,"abstract":"A rain cell model is used to derive expressions for the attenuation in six converging links (operating at 15 GHz and 18 GHz) and the measured rainfall rate at their nodal point. These expressions are adjusted to the experimental data to estimate the parameters of the model and to provide information on the structure and dynamics of rain cells in tropical regions.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125071375","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
Trends in mobile communication 移动通信趋势
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509718
H.J. Schmitt
{"title":"Trends in mobile communication","authors":"H.J. Schmitt","doi":"10.1109/SBMOMO.1995.509718","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509718","url":null,"abstract":"Some current developments of digital mobile systems are discussed including new coding techniques, channel modelling and simulation programs. Progress in high GHz-techniques and smart hardware development is illustrated. International exposure limits for biological interaction are summarized.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130455615","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
A tridimensional solenoidal basis function to analyze 3D scattering of homogeneous dielectrics using the method of moments 用矩量法分析均匀介质三维散射的三维螺线线基函数
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509734
L. Mendes, Sérgio Antenor
{"title":"A tridimensional solenoidal basis function to analyze 3D scattering of homogeneous dielectrics using the method of moments","authors":"L. Mendes, Sérgio Antenor","doi":"10.1109/SBMOMO.1995.509734","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509734","url":null,"abstract":"The use of rectangular and triangular basis functions with the method of moments to analyze the problem of scattering of electromagnetic waves by dielectric objects with high dielectric constant (/spl epsi//sub I/>10) leads to convergence problems due to the spurious charges associated with the basis functions. This paper proposes a solenoidal 3D basis function that can be used in the method of moments to overcome this problem.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124409774","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
A 622.08 MHz narrow bandwidth SAW filter for clock recovery 用于时钟恢复的622.08 MHz窄带宽SAW滤波器
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509635
C. M. Cabreira, C. Finardi, A.M. de Almeida, M. Barnet
{"title":"A 622.08 MHz narrow bandwidth SAW filter for clock recovery","authors":"C. M. Cabreira, C. Finardi, A.M. de Almeida, M. Barnet","doi":"10.1109/SBMOMO.1995.509635","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509635","url":null,"abstract":"This paper describes the development of a 622.08 MHz surface acoustic wave (SAW) filter for use in clock recovery units to recover the clock signal from NRZ (non-return-to-zero) data streams in SONET and SDH systems. A narrow bandwidth filter (less than 0.2%) using two different interdigital transducers (IDTs), working on two different harmonic frequencies, was designed and fabricated by the R&D Centre of Telebras. A description of the design and the fabrication are summarized and measurement results of the SAW filter are shown.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124549854","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
Quasi-static model for circular transmission lines 圆形输电线路的准静态模型
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509721
D. Jaisson
{"title":"Quasi-static model for circular transmission lines","authors":"D. Jaisson","doi":"10.1109/SBMOMO.1995.509721","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509721","url":null,"abstract":"Models have been developed for circular transitions of commonly used transmission lines, such as the stripline and the microstrip line, and have been included in commercial microwave CAD packages. Yet no general theory has been made for modeling the bends of other transmission lines, such as the coplanar waveguide. A model was derived for general circular transmission lines, based on a quasi-static approximation. This model was applied to a circular coplanar waveguide. Measurement of the latter showed good agreement with the model.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124602023","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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