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1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest最新文献

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An 800 MHz-band front-end MCM for antenna diversity type mobile communication handset terminals 用于天线分集型移动通信手持终端的800 mhz频段前端MCM
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595136
N. Suematsu, K. Hiroshige, A. Sakai, K. Maemura, N. Kasai, Y. Iyama, O. Ishida
{"title":"An 800 MHz-band front-end MCM for antenna diversity type mobile communication handset terminals","authors":"N. Suematsu, K. Hiroshige, A. Sakai, K. Maemura, N. Kasai, Y. Iyama, O. Ishida","doi":"10.1109/MTTTWA.1997.595136","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595136","url":null,"abstract":"An 800 MHz-band front-end multi-chip module (MCM) was developed for antenna diversity type handset terminals of the Japanese personal digital cellular systems (PDC). This module includes a dual input GaAs FET low noise amplifier (LNA) with a switching function, a SAW filter and a GaAs dual-gate FET mixer. Since the dual input LNA works as two independent LNAs and a SPDT switch, a very small size and a low production cost front-end MCM can be obtained. The package size of this MCM is 0.13 cc. With -10 dBm local input power and a supply d.c. current of 4.0 mA and a d.c. voltage of 3 V, a noise figure of 3.2 dB and a conversion gain of 22.5 dB were obtained.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"86 21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126288764","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
Future trends of HBT technology for commercial and defense applications HBT技术在商业和国防应用中的未来趋势
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595125
A. Oki, D. Streit, D. Umemoto, L. Tran, K. Kobayashi, F. Yamada, P. Grossman, T. Block, M. Lammert, S. Olson, J. Cowles, M. Hoppe, L. Yang, A. Gutierrez-Aitken, R. Kagiwada, S. Nojima, E. Rezek, W. Pratt, J. Neal, P. Seymour, V. Steel
{"title":"Future trends of HBT technology for commercial and defense applications","authors":"A. Oki, D. Streit, D. Umemoto, L. Tran, K. Kobayashi, F. Yamada, P. Grossman, T. Block, M. Lammert, S. Olson, J. Cowles, M. Hoppe, L. Yang, A. Gutierrez-Aitken, R. Kagiwada, S. Nojima, E. Rezek, W. Pratt, J. Neal, P. Seymour, V. Steel","doi":"10.1109/MTTTWA.1997.595125","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595125","url":null,"abstract":"Heterojunction bipolar transistor (HBT) technology has been under development since the early 1980s. In the mid-1990s HBT technology has matured providing components for high volume low cost commercial wireless applications, as well as for high performance defense avionics, ground, and space applications. We discuss the status and future trends of HBT IC technology and production for defense and commercial applications, including advanced technology development, and comparison to MESFET, HEMT, and silicon based bipolar technology. Brief mention is made of power amplifiers and signal synthesizers.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122369814","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
Analysis of passive components for wireless applications using TLM electromagnetic simulations 利用TLM电磁仿真分析无线应用中的无源元件
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595130
M. Righi, C. Eswarappa, W. Hoefer
{"title":"Analysis of passive components for wireless applications using TLM electromagnetic simulations","authors":"M. Righi, C. Eswarappa, W. Hoefer","doi":"10.1109/MTTTWA.1997.595130","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595130","url":null,"abstract":"The electromagnetic simulation of passive components for PCS systems such as miniaturized ceramic bandpass filters is presented. We have used the transmission line modelling (TLM), a general-purpose space-time discrete method, to perform the simulations. We have compared the computed scattering parameters of the filter with available measurement results. The features of the filter responses agree well.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123460593","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
Wireless digital communication: a signal processing prospective 无线数字通信:一种信号处理的前景
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595096
A. Viterbi
{"title":"Wireless digital communication: a signal processing prospective","authors":"A. Viterbi","doi":"10.1109/MTTTWA.1997.595096","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595096","url":null,"abstract":"Summary form only given, as follows. Wireless connectivity for voice and data is becoming an almost universal reality in the developed world. For underdeveloped nations, fixed wireless at lower cost and higher bandwidth efficiency, may dramatically raise the level of service and the population percentage served. The digital signal processing technology which provides reliable communication through the unreliable medium of terrestrial propagation is described, with emphasis on the technologies which are enabling the current rapid accelerating wireless subscriber growth.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"144 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126844596","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 microwave feedforward amplifier with improved phase compensation and wideband distortion cancellation 一种改进相位补偿和宽带失真消除的微波前馈放大器
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595115
Y.K.G. Hau, V. Postoyalko, J. Richardson
{"title":"A microwave feedforward amplifier with improved phase compensation and wideband distortion cancellation","authors":"Y.K.G. Hau, V. Postoyalko, J. Richardson","doi":"10.1109/MTTTWA.1997.595115","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595115","url":null,"abstract":"A new approach to the design of a wideband feedforward amplifier is investigated. Phase equalisers instead of linear delay lines are employed in the feedforward reference paths to match the nonlinear delay/phase characteristics of both the main and error amplifiers. A harmonic balance simulation indicates that this provides significant improvement in intermodulation cancellation over a wide bandwidth.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133182532","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
Wireless at the crossroads: network challenges for the new millennium 十字路口的无线:新千年的网络挑战
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595097
G. Brody
{"title":"Wireless at the crossroads: network challenges for the new millennium","authors":"G. Brody","doi":"10.1109/MTTTWA.1997.595097","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595097","url":null,"abstract":"Summary form only given. We are living in the Information Age. Information, its creation, processing, storage and delivery will be the dominant global force for the next several decades. The Information Age is characterized by the convergence of data communications, telecommunications, entertainment, broadcasting, cashless commerce and advertising. The heart of this combination is telecommunications. Wireless communications, specifically wireless personal communications, are poised to enter the mainstream of the Information Age. Wireless communication must provide the quality, reliability and ubiquity demanded by the services and end users. This must be accomplished in an increasingly complex environment of interconnected networks which are growing at a revolutionary pace. Furthermore, network flexibility and interworking will be paramount aspects of completing the global, information infrastructure. All of this will combine to require more sophistication from wireless networks and network providers than ever required before in history. Parallel networks, optimized for typical applications-such as video, wideband data, voice, etc.-will emerge. A wide variety of air interfaces will proliferate. End-user devices will continue to improve in processing power, human-machine interfaces, battery life and form factor. The challenges are significant, the opportunities immense and the benefit to society of a job well done, will be immeasurable.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131915719","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 single GaAs MMIC for up and down conversion in PCN transceivers 用于PCN收发器中上下转换的单个GaAs MMIC
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595135
M. A. Luqueze, D. Consonni, D. Viveiros, V.P. Neto
{"title":"A single GaAs MMIC for up and down conversion in PCN transceivers","authors":"M. A. Luqueze, D. Consonni, D. Viveiros, V.P. Neto","doi":"10.1109/MTTTWA.1997.595135","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595135","url":null,"abstract":"An active GaAs MMIC converter has been designed for dual operation in up and down frequency conversion, aiming at various applications in wireless telecommunication systems. The circuit design was specified for use in PCN transceivers, operating over the 200 MHz to 2.5 GHz RF band, with 45 to 500 MHz IF band. The converter design was based on a Gilbert (1968) cell structure, employing GaAs MESFET differential pairs and active baluns. Optimized characteristics were achieved by simulating the schematic and layout topologies, using the HP-EESOF CAD environment. The converter was sent for fabrication at the GEC-Marconi foundry, UK, as part of the former Eurochip Multi-Project-Wafer (now Europractice MPW). Measured results of the converter confirm its capability of delivering gain and presenting high isolation between ports, as well as adequate compression characteristics, in both transceiver pathways. Such results distinguish this device from commercially available mixers for PCN systems, for its dual operation as up and down converter and for its flexibility of use.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128255168","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
A coupled-segment quadrifilar helical antenna 一种耦合分段四线螺旋天线
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595108
D. Filipovic, M. A. Tassoudji, E. Ozaki
{"title":"A coupled-segment quadrifilar helical antenna","authors":"D. Filipovic, M. A. Tassoudji, E. Ozaki","doi":"10.1109/MTTTWA.1997.595108","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595108","url":null,"abstract":"A novel coupled-segment quadrifilar helical antenna is presented, for which a shorter axial length than a conventional quadrifilar helix is obtained. The coupled segment technique allows for modification of the radiation patterns to a shape which is more desirable for satellite communications systems, such as Globalstar.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"38 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120906825","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
A broadband, high gain PCS antenna using aperture coupled microstrip patches 一种采用孔径耦合微带贴片的宽带高增益PCS天线
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1997-02-23 DOI: 10.1109/MTTTWA.1997.595118
W. Harokopus, S. Sanzgiri, P. Gilliland
{"title":"A broadband, high gain PCS antenna using aperture coupled microstrip patches","authors":"W. Harokopus, S. Sanzgiri, P. Gilliland","doi":"10.1109/MTTTWA.1997.595118","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595118","url":null,"abstract":"Multibeam or \"smart antennas\" are needed to increase the coverage and consequently the cell size of the base stations for Personnel Communication Systems (PCS). Multibeam antennas provide increased gain, while still providing coverage over the entire cell. The microstrip patch antenna is a logical choice for this application because in addition to meeting the electrical specifications, the antenna is flat in appearance, and is capable of dual polarisation operation. The patch antenna can also be built with relatively low weight and cost. A 20 dB aperture coupled patch antenna has been demonstrated.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122698211","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
28 GHz solid state channelized transceiver for digital LMCS 用于数字LMCS的28ghz固态信道化收发器
1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1997.595102
Tae Ri Lee
{"title":"28 GHz solid state channelized transceiver for digital LMCS","authors":"Tae Ri Lee","doi":"10.1109/MTTTWA.1997.595102","DOIUrl":"https://doi.org/10.1109/MTTTWA.1997.595102","url":null,"abstract":"Summary form only given, as follows. A low cost 0.5 watt channelized transceiver unit (CTU) for 28 GHz Local Multipoint Communication System (LMCS) application is presented. The system advantages include modularity, efficiency, flexibility, reliability, frequency agility, and sufficient fade margin designed for the Canadian system. The CTU is a modular unit with up to 8 sectorialized hub, each sector having a rectangular fan shaped beam, suitable for two-way asymmetrical communication. The individual module including signal processing unit, linear SSPA, power combiner, digital modulator, analog modulator and sectoral antenna is explained. The measured performance of the field demonstrations in Brazil and Macau is also presented.","PeriodicalId":264044,"journal":{"name":"1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126157517","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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