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1991 IEEE MTT-S International Microwave Symposium Digest最新文献

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Pulse generation and measurement of radiated waveforms from an optically activated impulse generator 光激活脉冲发生器的脉冲产生和辐射波形的测量
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.147265
A. Kim, R. Zeto, R. Youmans, M. Weiner, J. Fishback, B. Lalevic
{"title":"Pulse generation and measurement of radiated waveforms from an optically activated impulse generator","authors":"A. Kim, R. Zeto, R. Youmans, M. Weiner, J. Fishback, B. Lalevic","doi":"10.1109/MWSYM.1991.147265","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.147265","url":null,"abstract":"The generation of extremely narrow, high peak power pulses using an optically activated impulse generator has been demonstrated. Radiative measurements at 1 Hz pulse repetition frequency have been conducted by pulse biasing this device up to 15 kV and subsequently triggering the device with an optical pulse from a Nd:YAG laser. The measured pulse from a wideband antenna had a pulsewidth of 1.5 ns, with a risetime of 900 ps. The frequency spectrum of this radiated waveform ranged from 50 MHz to 1 GHz. The peak field improved substantially as the bias voltage was increased from 9 kV to 15 kV. This may be attributed to the faster risetime at higher bias voltages, which can be radiated more efficiently.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130578865","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
Monolithic 38 GHz dielectric resonator oscillator 单片38 GHz介电谐振振荡器
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.147135
P. G. Wilson
{"title":"Monolithic 38 GHz dielectric resonator oscillator","authors":"P. G. Wilson","doi":"10.1109/MWSYM.1991.147135","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.147135","url":null,"abstract":"A 38 GHz monolithic DRO (dielectric resonator oscillator) incorporating a 0.3 micron HEMT (high electron mobility transistor) has been designed using a small-signal design procedure. Ten DROs have been tested, seven of which were found to be fully working at RF and gave output powers up to 0 dBm. The temperature coefficient of the frequency of oscillation was -2.1 ppm/ degrees C and the phase noise was -68 dBc/Hz at 100 kHz from carrier. The DRO is potentially inexpensive when produced in high volume and is suitable for a local oscillator in a broadband telecommunications system.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122301355","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: 18
The use of microwaves in Europe to detect, classify and communicate with vehicles 在欧洲使用微波来探测、分类和与车辆通信
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.147219
H. Roe
{"title":"The use of microwaves in Europe to detect, classify and communicate with vehicles","authors":"H. Roe","doi":"10.1109/MWSYM.1991.147219","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.147219","url":null,"abstract":"European projects concerning the use of microwave techniques to facilitate control and management of road traffic are discussed. Particular emphasis is placed on the DRIVE (Dedicated Road Infrastructure for Vehicle Safety in Europe) initiative. This project involves control of and assistance to traffic using road traffic informatics (RTI) systems of intelligent vehicle/highway systems (IVHS). This includes route guidance, road pricing, incident detection, and other facilities designed to ease the path of the driver and increase the capacity of the existing structures while making travelling safer.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123130456","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
Synthesis of non-contiguous diplexers using broadband matching theory 用宽带匹配理论合成非连续双工器
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.147058
R. Levy
{"title":"Synthesis of non-contiguous diplexers using broadband matching theory","authors":"R. Levy","doi":"10.1109/MWSYM.1991.147058","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.147058","url":null,"abstract":"An approximate but highly accurate simple closed-form solution for the element values of noncontiguous lowpass/highpass diplexers has been obtained using broadband matching theory. Excellent results are demonstrated by analysis of several diplexers of degree 10 having a return loss of 26 dB. Suggestions are made for extending the method to other types of noncontiguous multiplexers.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116487426","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: 14
S-parameter measurements and applications of superconducting flux flow transistors 超导磁通流晶体管s参数测量及应用
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.147243
J. Martens, V. Hietala, T. E. Zipperian, D. Ginley, C. Tigges, J. M. Phillips
{"title":"S-parameter measurements and applications of superconducting flux flow transistors","authors":"J. Martens, V. Hietala, T. E. Zipperian, D. Ginley, C. Tigges, J. M. Phillips","doi":"10.1109/MWSYM.1991.147243","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.147243","url":null,"abstract":"Microwave two-port S-parameter measurements and modeling were performed on superconducting flux flow transistors. These transistors, based on the magnetic control of flux flow in an array of high-temperature superconducting weak links, can exhibit significant available power gain at microwave frequencies (over 20 dB at 7-10 GHz in some devices). The input impedance is largely inductive, while the output impedance is resistive and inductive. These devices are potentially useful in numerous applications, including matched amplifiers.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131658067","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
MMIC transmission lines for multi-layered MMICs 多层MMIC传输线
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.147198
H. Ogawa, T. Hasegawa, S. Banba, H. Nakamoto
{"title":"MMIC transmission lines for multi-layered MMICs","authors":"H. Ogawa, T. Hasegawa, S. Banba, H. Nakamoto","doi":"10.1109/MWSYM.1991.147198","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.147198","url":null,"abstract":"Multilayered MMIC (monolithic microwave integrated circuit) transmission line configurations are proposed, and their performance is experimentally investigated. Four transmission line structures have been fabricated using polyimide films: (1) microstrip line with overlay, (2) inverted microstrip line, (3) trapezoid microstrip line, and (4) valley microstrip line. The minimum transmission line loss can be achieved by the trapezoid microstrip line if the characteristic impedance of each line is the same. The valley microstrip line can have the minimum line loss if the line width of each line is the same.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130815181","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: 45
Analysis and design of slot-coupled directional couplers between double-sided substrate microstrip lines 双面基板微带线间槽耦合定向耦合器的分析与设计
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.147114
M. F. Wong, V. F. Hanna, Odile Picon, Henri Baudrand
{"title":"Analysis and design of slot-coupled directional couplers between double-sided substrate microstrip lines","authors":"M. F. Wong, V. F. Hanna, Odile Picon, Henri Baudrand","doi":"10.1109/MWSYM.1991.147114","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.147114","url":null,"abstract":"The characteristics of a slot-coupled directional coupler between two microstrip lines coupled through a rectangular slot in the common ground plane are studied. First, conformal mapping techniques are used to obtain analytic closed-form expressions for the coupler even and odd mode impedances and propagation constants for any coupler configuration. Secondly, a full-wave analysis is performed using the spectral domain approach to determine the dispersion properties of the coupler parameters. Theoretical and experimental results for a 10 dB coupler at 10 GHz are presented.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130890656","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: 99
Effect of distributed gate diode on MESFET power performance evaluated by harmonic balance simulation 用谐波平衡仿真评价分布式栅极二极管对MESFET功率性能的影响
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.147077
P. White
{"title":"Effect of distributed gate diode on MESFET power performance evaluated by harmonic balance simulation","authors":"P. White","doi":"10.1109/MWSYM.1991.147077","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.147077","url":null,"abstract":"A mechanism for power limitation in GaAs MESFETs which arises from the distributed conduction properties of the resistive gate diode is evaluated using harmonic balance simulation in conjunction with a distributed diode model. It is shown that 1 dB compressed power output and peak efficiency depend on unit gate finger width, which has significance for device layout and choice of gate technology in high-power applications. Simulations for a typical X-band FET showed that 1 dB compressed power output and peak efficiency decreased with increasing gate finger width. The predicted power reduction of 50 mW/mm and efficiency reduction of 8% when gate finger width was increased from 50 to 200 mu are supported qualitatively by experimental data.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132269672","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
Component technology for 40 GHz fibre optic systems 40ghz光纤系统的组件技术
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.146989
I. Bennion, A. Carter, A. Moseley, M. Wale, R. Walker
{"title":"Component technology for 40 GHz fibre optic systems","authors":"I. Bennion, A. Carter, A. Moseley, M. Wale, R. Walker","doi":"10.1109/MWSYM.1991.146989","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.146989","url":null,"abstract":"The authors describe the design, manufacture, and performance of integrated optical modulators and InGaAs photodetectors for microwave optical systems operating up to 40 GHz. Critical design issues are examined and the achievements of current research are discussed. In particular, it is noted that GaAs integrated optical modulators based on a velocity-matched transmission line configuration which have been designed for bandwidths of up to 40 GHz indicate considerable potential for higher-frequency operation. The high modulation efficiency of these devices leads to modest drive power requirements which are compatible with solid-state sources. At the receive end of the link, high-efficiency, wide-bandwidth photodiodes are als available.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"29 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133451955","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
A modified dynamic model for planar microwave circuits 一种改进的平面微波电路动力学模型
1991 IEEE MTT-S International Microwave Symposium Digest Pub Date : 1991-07-10 DOI: 10.1109/MWSYM.1991.147207
T. Rozzi, A. Morini, A. Pallotta, F. Moglie
{"title":"A modified dynamic model for planar microwave circuits","authors":"T. Rozzi, A. Morini, A. Pallotta, F. Moglie","doi":"10.1109/MWSYM.1991.147207","DOIUrl":"https://doi.org/10.1109/MWSYM.1991.147207","url":null,"abstract":"An attempt is made to enhance the effectiveness of the method of moments in solving planar microwave circuits problems. The proposed dynamic model is a modified version of that presented by H.Y. Yang and N.G. Alexopolous (1988). The novelty of this approach consists of introducing a technique of fundamental mode sampling which substantially reduces the complexity of the analysis and the computation time involved in the characterization of all practical discontinuities. The numerical results are in good agreement with experimental data.<<ETX>>","PeriodicalId":263441,"journal":{"name":"1991 IEEE MTT-S International Microwave Symposium Digest","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114054281","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: 13
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