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1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)最新文献

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MMIC amplifier chip sets for Ka-band communications applications 用于ka波段通信应用的MMIC放大器芯片组
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755169
R. Freitag, K. Renaldo, H. G. Henry, J. Degenford
{"title":"MMIC amplifier chip sets for Ka-band communications applications","authors":"R. Freitag, K. Renaldo, H. G. Henry, J. Degenford","doi":"10.1109/MTTTWA.1999.755169","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755169","url":null,"abstract":"A family of five PHEMT 0.4-0.5 W driver chips and four 1-1.5 W power amplifier chips spanning 28-40 GHz has been developed. A robust 0.25 /spl mu/m T-gate technology enables the constituent 500 /spl mu/m PHEMT cells to consistently achieve yields >70% and power added efficiency >35%. The demonstrated high yield and resulting low cost of these MMICs makes them attractive building blocks for today's millimeter-wave communications systems.","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","volume":"40 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":"124451513","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
High frequency propagation prediction and estimation for wireless communication systems 无线通信系统高频传播预测与估计
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755139
Hiroshi Shirai
{"title":"High frequency propagation prediction and estimation for wireless communication systems","authors":"Hiroshi Shirai","doi":"10.1109/MTTTWA.1999.755139","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755139","url":null,"abstract":"A proper site choice of base stations is important for establishing a stable and secure wireless communication channel. Accordingly, a propagation prediction method, which can be easily implemented for a high frequency wireless communication channel in an urban environment should be developed. The basic idea of the ray tracing technique to account for reflection and diffraction from the ground and surrounding building structure is discussed for propagation prediction in an urban environment.","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","volume":"7 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":"125527912","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
A 3-V RF-CMOS dual-gate up-conversion mixer 一个3v RF-CMOS双栅上转换混频器
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755143
R. O'Toole
{"title":"A 3-V RF-CMOS dual-gate up-conversion mixer","authors":"R. O'Toole","doi":"10.1109/MTTTWA.1999.755143","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755143","url":null,"abstract":"A dual-gate double-balanced mixer for an UHF-VHF avionics communication system is presented. The circuit is implemented in a standard 0.5 /spl mu/m CMOS process and is designed for avionics systems that require high dynamic range and high reliability. In this application, the mixer upconverts from VHF to 674 MHz with a conversion gain of 13.5 dB and a single side-band noise figure (SSB NF) of 3.2 dB. The double-balanced mixer consumes 45 mA of current at 3.3 volts resulting in an input referred IIP3 of +7.35 dBm. This low noise figure and high intercept point, is simultaneously achieved by design balance, and use of image and noise terminations on the input RF ports.","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","volume":"156 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":"114514372","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
A high linearity, 35 dBm L-band power amplifier for Globalstar applications 高线性度，35 dBm l波段功率放大器，用于全球星应用
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755167
S. Toncich, W. Panton
{"title":"A high linearity, 35 dBm L-band power amplifier for Globalstar applications","authors":"S. Toncich, W. Panton","doi":"10.1109/MTTTWA.1999.755167","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755167","url":null,"abstract":"A high linearity, class A power amplifier has been designed for the Globalstar transmit band. The power amplifier provides 40 dB of gain at a Pout of 35 dBm (CDMA) at 1610.73 MHz with 30% efficiency with <-75 dBW/MHz ACP at 1605 MHz, thus exceeding the ETSI emissions requirement in the GLONASS band (1585-1605 MHz). The design has been verified from -30/spl deg/C to +70/spl deg/C.","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","volume":"45 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":"122280414","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
Miniature dielectric-loaded personal telephone antennas with low SAR 具有低SAR的微型介电负载个人电话天线
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755165
B. Rosenberger
{"title":"Miniature dielectric-loaded personal telephone antennas with low SAR","authors":"B. Rosenberger","doi":"10.1109/MTTTWA.1999.755165","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755165","url":null,"abstract":"The twisted loop or bifilar helix antenna is designed to minimise the specific absorption rate (SAR). It is basically a loop antenna which is balance fed at the top by a co-axial feed which passes axially through the centre. The lower portion of the antenna is a sleeve balun which creates a transition between single-ended and balanced drive so that the loop antenna can be fed with balanced currents. Currents at the centre conductor feed point of the antenna pass round a 360/spl deg/ path including the rim of the sleeve balun and then back to the outer conductor of the co-axial cable feed.","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","volume":"28 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":"131404250","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
High-performance low-cost indium phosphide MMICs for commercial wireless applications 用于商业无线应用的高性能低成本磷化铟mmic
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755171
D. Streit, A. Oki, R. Lai, V. Medvedev, K. Kobayashi
{"title":"High-performance low-cost indium phosphide MMICs for commercial wireless applications","authors":"D. Streit, A. Oki, R. Lai, V. Medvedev, K. Kobayashi","doi":"10.1109/MTTTWA.1999.755171","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755171","url":null,"abstract":"We describe a high-volume InP-based HEMT and HBT production line that produces both monolithic microwave and millimeter-wave circuits for wireless applications. Products as diverse as 900 MHz InP HBT cellular power amplifiers and 155 GHz InP HEMT low noise amplifiers are manufactured on the same fab line, modeled after our successful GaAs HEMT and HBT fab line. These products have found acceptance in both high volume commercial wireless applications as well as more specialized millimeter wave applications.","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","volume":"1 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":"130152273","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
Experiences in industry-university wireless technology collaboration 有产学研无线技术合作经验
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755141
C. Scholefield, V. Leung, H.A. Alnuweiri
{"title":"Experiences in industry-university wireless technology collaboration","authors":"C. Scholefield, V. Leung, H.A. Alnuweiri","doi":"10.1109/MTTTWA.1999.755141","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755141","url":null,"abstract":"Universities and industry have different paradigms by which they measure success. Universities have a long-term focus of intellectual enquiry, while industry has a short-term focus dictated by rapidly changing competition. Certain obstacles such as contractual arrangements and intellectual property considerations can obstruct the free-flow of ideas between university and industry. Ideas are presented on how the university-industry relationship may be enhanced.","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","volume":"9 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":"133932479","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
Estimating 28 GHz LMDS channel dispersion in urban areas using a ray-tracing propagation model 利用射线追踪传播模型估计城市地区28ghz LMDS信道色散
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755138
H. R. Anderson
{"title":"Estimating 28 GHz LMDS channel dispersion in urban areas using a ray-tracing propagation model","authors":"H. R. Anderson","doi":"10.1109/MTTTWA.1999.755138","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755138","url":null,"abstract":"Broadband wireless systems such as LMDS operating in the millimeter wave band offer the potential for a highly flexible, high-speed, two-way information distribution network to serve local and metropolitan areas. To date, relatively little research has been done to characterize such wireless channels in order to determine the degree of sophistication required in the transmission hardware. This paper uses a ray-tracing propagation model to investigate the dispersive nature of the transmission channel in a typical urban environment. The results of this work show that highly directional antennas can effectively reduce channel dispersion so that high-speed digital transmission should be possible without requiring equalizers in the receivers. This research also suggests that intelligent use of stable reflection paths could provide an effective means of providing LMDS service to non line-of-sight locations.","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","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":"130872885","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: 6
A broadband microstrip-fed slot antenna 宽带微带馈电槽天线
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755163
William R. Deal, V. Radisic, Y. Qian, T. Itoh
{"title":"A broadband microstrip-fed slot antenna","authors":"William R. Deal, V. Radisic, Y. Qian, T. Itoh","doi":"10.1109/MTTTWA.1999.755163","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755163","url":null,"abstract":"In this paper, a new variation of the microstrip-fed slot antenna is investigated. Simulation and experimental results indicate large operating bandwidth and good radiation properties, making this antenna an excellent candidate for wireless applications.","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","volume":"34 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":"134345316","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: 31
Low cost, high performance RF substrates 低成本，高性能射频基板
1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390) Pub Date : 1900-01-01 DOI: 10.1109/MTTTWA.1999.755130
N. Santhanam
{"title":"Low cost, high performance RF substrates","authors":"N. Santhanam","doi":"10.1109/MTTTWA.1999.755130","DOIUrl":"https://doi.org/10.1109/MTTTWA.1999.755130","url":null,"abstract":"In the past 50 years, as the lower frequency bands in the electromagnetic spectrum have been rapidly used, the common frequencies for wireless applications have increased from 500 MHz to 77 GHz+. Also, in the last decade, the market has moved from a predominately military market, to a 100% consumer-driven market. These factors, in conjunction with several more wireless applications in a competitive marketplace, have created the need to reduce the cost of all components. One area of focus is the laminate cost, and the cost of PCB (printed circuit board) fabrication. Designers and laminate manufacturers, in collaboration with several resins manufacturers, have been experimenting with, and designing various substrates to reduce the overall cost. These designers and manufacturers have had limited success, and have constantly run into deficiencies. This paper looks at some of the deficiencies, and some of the myths, and attempts to answer the question: \"is there is really a true low-cost, microwave and RF substrate?\".","PeriodicalId":261988,"journal":{"name":"1999 IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (Cat. No. 99TH8390)","volume":"48 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":"132535437","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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