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Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)最新文献

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Performance of an adaptive rate modem using quasi-analytic simulation techniques 基于准解析仿真技术的自适应速率调制解调器性能研究
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709157
P. Hofstetter, M. Wickert
{"title":"Performance of an adaptive rate modem using quasi-analytic simulation techniques","authors":"P. Hofstetter, M. Wickert","doi":"10.1109/RAWCON.1998.709157","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709157","url":null,"abstract":"Analysis of bit error rate (BER) of a /spl pi//M-MDPSK modem in an (additive white Gaussian noise) AWGN channel using quasi-analytic simulation techniques is considered in this paper. Implementation losses, most notable at M=32 and 64, which result from practical transmit and receive filtering, can be largely overcome by increased accuracy symbol timing recovery and a fixed equalization filter.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128927314","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
Modeling and characterization of wire bonding and tape automatic bonding. Analytical formulas and experimental validation 线键合和胶带自动键合的建模和表征。分析公式及实验验证
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709191
N. Hassaine, Y. Shen, P. Ntake
{"title":"Modeling and characterization of wire bonding and tape automatic bonding. Analytical formulas and experimental validation","authors":"N. Hassaine, Y. Shen, P. Ntake","doi":"10.1109/RAWCON.1998.709191","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709191","url":null,"abstract":"A simplified method has been established to model and characterize two types of short interconnections: wire bonding and tape automatic bonding (TAB). A comparison between these two parasitic elements is presented and analytical formulas easy to use in CAD applications are proposed to calculate their inductance. These results are compared with measurements performed in the frequency range of (1-30) GHz.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121742276","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
Application of RF LDMOS power transistors for 2.2 GHz wideband-CDMA RF LDMOS功率晶体管在2.2 GHz宽带cdma中的应用
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709198
A. Wood, W. Brakensiek
{"title":"Application of RF LDMOS power transistors for 2.2 GHz wideband-CDMA","authors":"A. Wood, W. Brakensiek","doi":"10.1109/RAWCON.1998.709198","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709198","url":null,"abstract":"Wideband CDMA was conceived to carry high bit rate data and video information in addition to voice traffic. The IMT2000 standard has adopted the 2.11 to 2.17 GHz band for this service, posing the design challenge of a higher operating frequency band than the PCS (1.8-1.99 GHz) and wider modulation bandwidth for the signals. This paper describes the results for a 60 W single-ended and a 120 W push-pull RF LDMOS device characterized with W-CDMA signals in the IMT2000 frequency band.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124624769","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
GaAs HBT power amplifier with smooth gain control characteristics 具有平滑增益控制特性的GaAs HBT功率放大器
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709201
E. Jarvinen
{"title":"GaAs HBT power amplifier with smooth gain control characteristics","authors":"E. Jarvinen","doi":"10.1109/RAWCON.1998.709201","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709201","url":null,"abstract":"A gain control scheme giving simultaneously an effective power switch-off operation and smooth gain control characteristics is presented. The concept was applied to a 3-stage power amplifier which was a part of a 900-MHz transmitter chip. The chip was realised by using GaAs MMIC technology and was mounted on a ceramic substrate. The power amplifier was tested separately by mounting it directly on a conventional FR4 board. In this lossy environment the power amplifier delivered an output power of 33.2 dBm with a supply voltage of 3.5 V. The maximum value of the gain control slope was 22 V/V showing a good agreement to the simulations.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124113319","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
Triple input single chip diversity LNA 三输入单芯片分集LNA
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709205
U. Lott
{"title":"Triple input single chip diversity LNA","authors":"U. Lott","doi":"10.1109/RAWCON.1998.709205","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709205","url":null,"abstract":"For mobile terminals using antenna diversity, a prototype monolithic integrated triple input low noise amplifier (LNA) with diversity function has been realized. The diversity LNA has more than 10 dB gain and less than 4 dB noise figure from 4 to 5 GHz. For comparison, a single LNA was fabricated on the same wafer showing very similar performance. The chip area is reduced by more than 30% and the power consumption by 50% compared to a multichip LNA with a switch.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134043584","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
Resonant frequency of dielectric resonator 介质谐振器的谐振频率
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709189
Juseop Lee, Sang‐Min Han, Young-Sik Kim
{"title":"Resonant frequency of dielectric resonator","authors":"Juseop Lee, Sang‐Min Han, Young-Sik Kim","doi":"10.1109/RAWCON.1998.709189","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709189","url":null,"abstract":"In this paper, an effective dielectric constant (EDC) has been introduced in an axial attenuation constant of dielectric waveguide model (DWM) method to calculate more accurately the resonant frequency of the TE/sub 01/spl delta// mode of a dielectric resonator (DR) in an MIC environment. The accuracy of this method is shown to be better than 1.5% error.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130461815","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 novel approach for gain and bandwidth enhancement of patch antennas 一种提高贴片天线增益和带宽的新方法
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709176
Y. Qian, D. Sievenpiper, V. Radisic, E. Yablonovitch, T. Itoh
{"title":"A novel approach for gain and bandwidth enhancement of patch antennas","authors":"Y. Qian, D. Sievenpiper, V. Radisic, E. Yablonovitch, T. Itoh","doi":"10.1109/RAWCON.1998.709176","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709176","url":null,"abstract":"The microstrip patch is one of the most preferred antenna structures for low-cost and compact design of wireless communication systems and RF sensors. To overcome several intrinsic limitations of the patch antenna such as narrow bandwidth, low gain, and degradation of radiation efficiency at higher frequencies, we propose a novel technique for gain and bandwidth enhancement based on the photonic band-gap (PBG) concept. The Ku-band prototype demonstrates over 3 times bandwidth improvement, and 1.6 dB higher gain or 45% increase in effective radiated power (ERP), compared with a regular patch with identical dimensions. System design issues such as co-site interference can also be alleviated by the improved beam patterns of the new PBG antenna.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128085142","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: 77
Microstrip bowtie patch antenna for wireless indoor communications 用于室内无线通信的微带领结贴片天线
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709172
C. H. Ng, S. Uysal, M. Leong
{"title":"Microstrip bowtie patch antenna for wireless indoor communications","authors":"C. H. Ng, S. Uysal, M. Leong","doi":"10.1109/RAWCON.1998.709172","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709172","url":null,"abstract":"A novel methodology is presented for the design of a wideband microstrip bowtie patch antenna (MBA) of finite length placed on a dielectric substrate. Here, a microstrip line feed network was used in HP Microwave Design System (MDS/sup TM/) to match the MBA, since this type of feed network facilitates the construction of an array. Experimental measurements for the bowtie designed in the X-band are shown to agree well with the simulated predictions, especially the radiation patterns. The resonant length of the antenna was found to be around twice the dielectric wavelength of 20.2 mm. The bandwidth obtained is about 9.7%.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128093348","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
Advanced chip-in-board thin film hybrid technology with integrated polyimide film capacitors for ultra high-speed and millimeter-wave applications 先进的片内薄膜混合技术，集成聚酰亚胺薄膜电容器，用于超高速和毫米波应用
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709149
W. Nohr, G. Hanke, D. Weber
{"title":"Advanced chip-in-board thin film hybrid technology with integrated polyimide film capacitors for ultra high-speed and millimeter-wave applications","authors":"W. Nohr, G. Hanke, D. Weber","doi":"10.1109/RAWCON.1998.709149","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709149","url":null,"abstract":"The processing of extreme high bit rates (/spl ges/20 Gbit/s) or signal frequencies (/spl ges/20 GHz) is of increasing importance for advanced telecommunications. Therefore a suitable circuit arrangement is necessary. Problems like frequency dispersion of microstrip lines, frequency dependence of parasitic impedances, and transforming characteristics of any finite length of layer must be solved. For this purpose a chip-in-board embedding technique with integrated film capacitors was developed. The article describes the manufacturing of such thin film hybrid circuits containing planar capacitors and feed-through capacitors. The chip interconnection technology is represented too.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131214882","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
Transmission techniques for increased power efficiency in OFDM-based wireless communication systems 在基于ofdm的无线通信系统中提高功率效率的传输技术
Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194) Pub Date : 1998-08-09 DOI: 10.1109/RAWCON.1998.709125
R. Dinis, A. Gusmão
{"title":"Transmission techniques for increased power efficiency in OFDM-based wireless communication systems","authors":"R. Dinis, A. Gusmão","doi":"10.1109/RAWCON.1998.709125","DOIUrl":"https://doi.org/10.1109/RAWCON.1998.709125","url":null,"abstract":"Due to their robustness against the time-dispersive effects of multipath propagation, OFDM schemes are widely considered for high rate transmission in digital wireless systems. This paper deals with power efficiency issues in OFDM-based broadband wireless systems for the MM-wave band. We consider grossly nonlinear power amplifiers only, within conventional and two-branch transmitter structures; channel coding and interleaving in the frequency domain; a space-diversity, maximal-ratio combining scheme, and, as an alternative to conventional ARQ, similar time-diversity, packet combining schemes. A set of simulation results is presented and discussed.","PeriodicalId":226788,"journal":{"name":"Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121132941","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
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