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1986 16th European Microwave Conference最新文献

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Microwave and Millimeter-Wave Transistor Devices 微波和毫米波晶体管器件
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334178
Y. Takayama
{"title":"Microwave and Millimeter-Wave Transistor Devices","authors":"Y. Takayama","doi":"10.1109/EUMA.1986.334178","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334178","url":null,"abstract":"This paper will review the recent advances in microwave and millimeter-wave, especially above X-band, transistors and monolithic integrated circuits in Japan. GaAs and related-compound semiconductor devices including GaAs MESFETs, GaAs MMICs, two-dimensional electron gas transistors and heterojunction bipolar transistors will be focussed.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132073115","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
Medical Imaging using Microwaves and Ultrasound 利用微波和超声波进行医学成像
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334172
H. Ermert
{"title":"Medical Imaging using Microwaves and Ultrasound","authors":"H. Ermert","doi":"10.1109/EUMA.1986.334172","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334172","url":null,"abstract":"Based on analogies between microwaves and ultrasonic waves common procedures for medical diagnostic imaging are summarized. Common problems as well as differences between microwaves and ultrasound are pointed out and resulting limitations with respect to this kind of application are discussed. Furthermore, activities in this field are reviewed, corresponding literature is presented.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115211745","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
Design of Microstrip-Slotline Ring 3 dB Directional Couplers with Offset Center Frequencies 中心频率偏置的微带-槽线环形3db定向耦合器设计
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334226
J. Chramiec
{"title":"Design of Microstrip-Slotline Ring 3 dB Directional Couplers with Offset Center Frequencies","authors":"J. Chramiec","doi":"10.1109/EUMA.1986.334226","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334226","url":null,"abstract":"Principle of operation and analysis of microstrip-slotline ring 3 dB directional couplers featuring an offset between the center frequencies of two coupling characteristics is presented. Potential applications of such couplers include various balanced nonlinear and parameetric circuits. Theoretical and experimental characteristics of three couplers designed to possess the centre frequencies of 4 and 12 GHz, 6 and 12 GHz, 10.7 and 12 GHz are also given.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114829360","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
Design of Sloping Septum Polarizers using Coupled Wave Equations 用耦合波方程设计斜隔极化器
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334229
J. Hinken, K. Jedamski, F. Henze
{"title":"Design of Sloping Septum Polarizers using Coupled Wave Equations","authors":"J. Hinken, K. Jedamski, F. Henze","doi":"10.1109/EUMA.1986.334229","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334229","url":null,"abstract":"Converters between circular and linear polarisation are of great interest e.g. in satellite communications. The operation bandwidth of waveguide polarizers with cylindrical pure metal or pure dielectric inserts can be increased by combining both /1/ Pure metal inserts, however, are advantageous at high temperature variations as in outdoor units. Stepped metal septum polarizers can be designed to give near 0 dB ellipticity over medium bandwidth /2/. Sloping metal septum polarizers are assumed to give only bandwidths up to 5 % /2/. But they seem desirable for high return loss. In /3/ it is shown that the behaviour of stepped septum polarizers can be calculated by using mode matching techniques to obtain the generalized scattering matrix of each step. The modal fields of the ridge waveguide eigenvalue problem have to be known. Although it is on principle also possible to calculate sloping septum polarizers with this method by treating them as stepped ones with many very small steps /3/, this does not seem convenient because of the computational effort.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114643131","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
MMICs, Modelling, and CAD-Where do we Go from Here? mmic，建模和cad -我们从这里走到哪里?
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334174
R. Pucel
{"title":"MMICs, Modelling, and CAD-Where do we Go from Here?","authors":"R. Pucel","doi":"10.1109/EUMA.1986.334174","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334174","url":null,"abstract":"During the past decade remarkable advances have been made in the integration of microwave circuits on semiconductor chips. This progress could not have taken place without the concomitant advances in the technology of planar circuits, modelling techniques, and computer-aided design (CAD) software. It is evident from developments in the United States and elsewhere that there is an increasing demand for improved circuit performance, higher design accuracy, and greater circuit density on a chip, all with higher yield. Unfortunately, industry's progress in improved device and component modelling, as well as advances in CAD techniques to meet these requirements, have not kept pace. In light of this observation, it is appropriate for us to \"take stock\" of where we are, where we wish to be in the near future, and what must be done to get there. In general terms, this is the theme of this paper.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129120537","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: 22
A MM-Wave SAR-Design for Helicopter Application (ROSAR) 一种用于直升机的毫米波sar (ROSAR)设计
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334213
H. Klausing, N. Bartsch, C. Boesswetter
{"title":"A MM-Wave SAR-Design for Helicopter Application (ROSAR)","authors":"H. Klausing, N. Bartsch, C. Boesswetter","doi":"10.1109/EUMA.1986.334213","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334213","url":null,"abstract":"First developments on Synthetic Aperture Radar (SAR) system based on use of Doppler information to obtain high resolution in azimuth direction were originated in 1951 by Carl Wiley. For short range battlefield reconnaissance applications mm wave imaging sensors find increasing interest. Preliminary studies show that high resolution SAR sensors in the usual sidelooking configuration may be developed at 35 GHz and 94 GHz in the near future. Imaging systems, based on Synthetic Aperture Radar concept for airborne and spaceborne applications are designed for a straight linear flight path. In this paper an unusual concept of a Synthetic Aperture Radar with rotating antennas for high resolution imaging is discussed, based on the rotational rather than the translational movement of the antenna phase center. The ROSAR concept has potential benefits for civil and military helicopter borne imaging applications, if the antennas are mounted at the tips of the rotor blades, for example. The concept has two main potential benefits, that are, the imaging field of view is 360° and there is no need for a forward velocitiy, because the rotor induced Doppler spectrum is used for imaging only. For the special helicopter requirements the mm wave frequencies (35 GHz/94 GHz) looks feasible. As opposed to SAR systems, based on linear antenna movement, high resolution ROSAR imaging is based on synthetic apertures of circular shape and the ROSAR processing differs considerably from the regular SAR processing schemes.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130648596","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
Propagation of High Frequency Waves in Tunnel 高频波在隧道中的传播
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334198
S. Kyheng, P. Degauque, J. Baudet
{"title":"Propagation of High Frequency Waves in Tunnel","authors":"S. Kyheng, P. Degauque, J. Baudet","doi":"10.1109/EUMA.1986.334198","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334198","url":null,"abstract":"Theoretical and experimental approaches of the propagation of high frequency waves in tunnel are described. The frequency range extends from 900 MHz to 10 GHz. In the experimental part, it is interesting to know, not only the mean value of the attenuation constant but also the important variations of the field amplitude due to multiple paths. Indeed this effect must be taken into account to elaborate the optimum coding of a digital transmission.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132405314","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
C-Band Attenuator/Phase Shifter Unit c波段衰减器/移相器单元
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334236
J. P. Starski
{"title":"C-Band Attenuator/Phase Shifter Unit","authors":"J. P. Starski","doi":"10.1109/EUMA.1986.334236","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334236","url":null,"abstract":"A C band attenuator/phase shifter unit has been designed. The unit has an attenuation range of 0-40 dB and can control the phase in 45° steps between 0-360°. The bandwidth is approximatly 18% with a center frequency of 5.5 GHz. The unit consists of an attenuator and 3 bit PIN diode phase shifter. The attenuator is of the absorptive type and uses phase optimized PIN diode modules. The unwanted phase variation as a function of attenuation is minimized to ±15° in the entire frequency range. Each phase shifter bit is of the hybrid coupler reflective type and uses broadside coupled transmission lines as matching networks as well as DC isolation. The matching networks are designed to give optimized phase vs frequency response.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"413 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114121946","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
Pulsed and CW N-Type Silicon Single-Drift Impatt Diodes for 140 GHz 用于140 GHz的脉冲和连续n型硅单漂移冲击二极管
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334254
J. Wenger, J. Freyer, W. Harth
{"title":"Pulsed and CW N-Type Silicon Single-Drift Impatt Diodes for 140 GHz","authors":"J. Wenger, J. Freyer, W. Harth","doi":"10.1109/EUMA.1986.334254","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334254","url":null,"abstract":"The drift-zone length and optimum doping density of 140 GHz Impatt diodes is evaluated from measurements of the breakdown voltage versus doping concentration. Pulsed and cw n-type single drift diodes were fabricated and the rf-performance was investigated. Relatively high output power levels of 1.6 W (pulsed) and 70 mW (cw) with efficiency values of 2.6 % and 3.2%, respectively, indicate a proper design. Improved repro ducibility can be achieved using a technology with beam-lead diodes and quartz ring packages.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115829990","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
MMIC Prospects in Microwave Communications 微波通信中的MMIC展望
1986 16th European Microwave Conference Pub Date : 1986-10-01 DOI: 10.1109/EUMA.1986.334175
F. Ivanek
{"title":"MMIC Prospects in Microwave Communications","authors":"F. Ivanek","doi":"10.1109/EUMA.1986.334175","DOIUrl":"https://doi.org/10.1109/EUMA.1986.334175","url":null,"abstract":"Potential applications of monolithic microwave integrated circuits (MMIC) in microwave communications received comparatively little attention in articles, conference papers, etc., so far. A notable exception was the Workshop on MMICs held last year at this Conference. It included a session entitled \"Impact of MMICS on Communications and Broadcasting Systems \" . The presentations and discussion clearly demonstrated the widespread interest among equipment designers to use MMICs as soon as these can satisfy the performance requirements at justifiable cost.","PeriodicalId":227595,"journal":{"name":"1986 16th European Microwave Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131390616","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
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