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

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Comparison between radiometrically measured and predicted attenuation at 23.8 and 31.4 GHz in temperate climate 温带气候下23.8 GHz和31.4 GHz辐射测量衰减与预测衰减的比较
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509674
F. Barbaliscia, E. Fionda, P. Masullo
{"title":"Comparison between radiometrically measured and predicted attenuation at 23.8 and 31.4 GHz in temperate climate","authors":"F. Barbaliscia, E. Fionda, P. Masullo","doi":"10.1109/SBMOMO.1995.509674","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509674","url":null,"abstract":"The atmospheric attenuation in the absence of liquid water, both rain and clouds, is considered as a relevant parameter for the design of low availability satellite communication systems. The absorption due to oxygen and water vapour is derived from experimental radiometric measurements, carried out for one year in Roma, Italy, and calculated with the ITU-R algorithm, based on climatic surface data. The comparison shows that clear sky attenuation, mostly due to water vapour, can be accurately estimated by simplified models, the corresponding discrepancy with the measured \"truth reference\" being, however, dependent upon the degree of air humidity. The resultant indications are of relevance for the design of commercial systems, especially in those climates, such as the tropics, where the vapour density is usually higher with respect to temperate zones.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"2 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":"114676109","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
The capacity of a CDMA wireless system CDMA无线系统的容量
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509720
M. Alencar
{"title":"The capacity of a CDMA wireless system","authors":"M. Alencar","doi":"10.1109/SBMOMO.1995.509720","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509720","url":null,"abstract":"Code division multiple access is a technique in which several users access a common medium, by modulating their symbols with designed spreading sequences. This article describes and analyzes a model for the discrete-input continuous-output Gaussian multiple access channel, that uses spread spectrum techniques. The relationship between the capacity of such system and the associated probability of error is also presented.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"73 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":"124895823","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
MEF system: an object-oriented finite element package MEF系统:一个面向对象的有限元软件包
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509669
Marcus Yiui M. Leal, L.A. Bermudez
{"title":"MEF system: an object-oriented finite element package","authors":"Marcus Yiui M. Leal, L.A. Bermudez","doi":"10.1109/SBMOMO.1995.509669","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509669","url":null,"abstract":"The article presents a generic finite element package which solves a great number of electromagnetic and related problems. The adoption of object-oriented programming for the software implementation allows the treatment of complex problems and the use of the existent code for the solution of new formulations.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"28 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":"123592652","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
Heterojunction bipolar transistors under illumination: theory and experiment 光照下的异质结双极晶体管:理论与实验
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509738
L. de Barros, A. Paolella, P. Herczfeld
{"title":"Heterojunction bipolar transistors under illumination: theory and experiment","authors":"L. de Barros, A. Paolella, P. Herczfeld","doi":"10.1109/SBMOMO.1995.509738","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509738","url":null,"abstract":"A new model for the HBT has been developed which solves for the electrical and photogenerated currents in the base, emitter, and collector. The model accounts for the discontinuity in the quasi-fermi level by defining an effective carrier interface velocity. Experimental and theoretical curves relating to the device behavior are presented and compared.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"55 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":"126848283","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
Discriminator using a dual-mode dielectric-resonator-loaded cavity for narrowband microwave receiver applications 采用双模介质谐振腔负载的窄带微波接收机鉴别器
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509679
M. Mosso, A. Podcameni
{"title":"Discriminator using a dual-mode dielectric-resonator-loaded cavity for narrowband microwave receiver applications","authors":"M. Mosso, A. Podcameni","doi":"10.1109/SBMOMO.1995.509679","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509679","url":null,"abstract":"An original dielectric resonator dual-mode discriminator is described for narrow band low-cost microwave receiver applications. The device is useful for receivers possessing an ultimate bandwidth from 5 to 50 MHz. An application is presented where the discriminator is used for automatic frequency control in a Ku-band satellite beacon receiver.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"6 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":"115112867","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
CAD for the synthesis of rectangular microstrip antennas 矩形微带天线的CAD合成
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509627
D. Marcano, C. Terret, L.M. Diaz, B. Allocca
{"title":"CAD for the synthesis of rectangular microstrip antennas","authors":"D. Marcano, C. Terret, L.M. Diaz, B. Allocca","doi":"10.1109/SBMOMO.1995.509627","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509627","url":null,"abstract":"There are many powerful CAD-packages for the analysis of microstrip antennas. But the literature hasn't reported any CAD-package for the synthesis of this type of antenna. A PC software for the synthesis of coaxially fed rectangular microstrip antennas is presented, using the improved transmission line method to predict the input characteristics of a rectangular microstrip antenna. Results are shown in which there is good agreement between the synthesis and experimental results obtained by other authors.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"7 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":"116053855","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 new and efficient approach to the accurate simulation of phase noise in microwave MESFET oscillators 一种精确模拟微波MESFET振荡器相位噪声的新方法
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509626
Chang-Li Chen, X. Hong, B. Gao
{"title":"A new and efficient approach to the accurate simulation of phase noise in microwave MESFET oscillators","authors":"Chang-Li Chen, X. Hong, B. Gao","doi":"10.1109/SBMOMO.1995.509626","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509626","url":null,"abstract":"We present a new and efficient approach to the simulation of accurate near-carrier phase noise in free-running microwave MESFET oscillators. First, a new kind of noise analysis model of the oscillators is proposed that contains a complete nonlinear noise model of the MESFET. Then an efficient algorithm is proposed to predict the accurate near-carrier phase noise in the microwave MESFET oscillators by the nonlinear current method. Examples of application prove that the new approach is suitable for microwave CAD and excellent in both efficiency and precision in predicting phase noise in the microwave MESFET oscillators.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"470 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":"116450299","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
Mapping of installed optical cables on electric energy transmission lines in Brazil and possible new applications 测绘巴西电力传输线路上安装的光缆及其可能的新应用
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509666
M. Drummond, L. Valente, L.R. Kawase, L.S. Demenicis, R. Dutra
{"title":"Mapping of installed optical cables on electric energy transmission lines in Brazil and possible new applications","authors":"M. Drummond, L. Valente, L.R. Kawase, L.S. Demenicis, R. Dutra","doi":"10.1109/SBMOMO.1995.509666","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509666","url":null,"abstract":"A great number of optical cable has been installed on electric energy transmission lines in Brazil. This work has been done by power utilities and telecommunication companies, which are, in general, state owned companies. However most of this work has been done independently. However, it became necessary to agglutinate this information. Cepel, the Brazilian Electric Energy Research Center, decided to compile all information related to the installation and use of optical cable on transmission lines (OCTL) in Brazil. We believe this work will help companies to link all the existing and planned systems, and to improve their connections and compatibility. The authors show tables and graphs with updated information. They also discuss how these systems can be used to monitor the energy transmission lines in a remote way to improve the system performance.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"65 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":"122980962","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
24-channel synchronous parallel optical fiber interconnection 24通道同步并行光纤互连
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509602
F. R. Barbosa, J. S. Pereira, F. M. Matsumoto, A. Coral
{"title":"24-channel synchronous parallel optical fiber interconnection","authors":"F. R. Barbosa, J. S. Pereira, F. M. Matsumoto, A. Coral","doi":"10.1109/SBMOMO.1995.509602","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509602","url":null,"abstract":"The article describes the complete experimental demonstration of an optoelectronic parallel interconnection spanning 24 parallel channels comprising three units of hermetically packaged monolithic 8-element laser array, integrated 8-element fiber optical ribbon, and monolithic 8-element photodetector array, and the corresponding 24-channel electronic circuitry for drive and reception. The experimental system has a 300 m fiber length per channel. All channels are totally independent both electrically and optically. The measured optical crosstalk (XTK) is <-40 dB, and the thermal XTK is <-30 dB. The total skew is less than 5 ns; and the BER is <10/sup -14/. Successful installation of the optical multichannel interconnection in a digital switching (Tropico RA) system demonstrated error-free operation and no degradation in performance, compared to the present (/spl ap/10 m cable length) standard electrical interconnection.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"85 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":"122118630","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
On null steering in rectangular planar array using external elements 矩形平面阵列中利用外部元件的零导向问题
Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Pub Date : 1995-07-24 DOI: 10.1109/SBMOMO.1995.509640
S. Zainud-Deen
{"title":"On null steering in rectangular planar array using external elements","authors":"S. Zainud-Deen","doi":"10.1109/SBMOMO.1995.509640","DOIUrl":"https://doi.org/10.1109/SBMOMO.1995.509640","url":null,"abstract":"Two methods of null steering in planar arrays are described. One utilizes four external elements oriented along the symmetrical axes of the array and the other uses two of the actual edge elements of the array together with two external elements placed beyond the other ends of the array. In both methods the choice of the external element positions and the use of conjugated phase shifts are utilized to produce a superimposed interferometer pattern whose peaks coincide, approximately, with all of the peaks of the sidelobes and whose zeros coincide with the nulls of the array pattern. Simple closed form expressions for the amplitudes of the cancellation signals that fed to the external elements are given. A comparison is made between the two methods.","PeriodicalId":225072,"journal":{"name":"Proceedings of 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference","volume":"7 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":"129412386","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
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