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115 GHz Low Noise Cryogenic Receiver for Radioastronomy 115 GHz低噪声低温射电天文接收机
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332463
G. Beaudin, B. Lazareff, J. Mahieu
{"title":"115 GHz Low Noise Cryogenic Receiver for Radioastronomy","authors":"G. Beaudin, B. Lazareff, J. Mahieu","doi":"10.1109/EUMA.1977.332463","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332463","url":null,"abstract":"This paper describes a cryogenic front-end designed for radioastronomical observations around 115 GHz. The system includes an image-rejection filter, a single ended microstrip mixer, and a 5 GHz IF consisting of a paramp followed by a FET amplifier, all cooled at 20°K and 77°K. The mixer uses state of the art GaAs Pt/Au Schottky diodes. Modular construction using microstrip techniques allows an easy replacement of the diode. Design and construction aspects are discussed, with emphasis on scaling methods and problems associated with cooling. Measurement methods are described. Individual stage and overall performance results are presented.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127189685","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
Frequency Dependence of Corrugated Horn Mode Order 波形角模阶的频率依赖性
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332447
A. Marinčić, B. Milovanovic
{"title":"Frequency Dependence of Corrugated Horn Mode Order","authors":"A. Marinčić, B. Milovanovic","doi":"10.1109/EUMA.1977.332447","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332447","url":null,"abstract":"Corrugated conical horns are extensively used as radiators where a relatively broadband and symmetrical radiation patterns are needed. The properties of these horns were investigated by many workers, both theoretically and experimentally. In some works frequency variation of groove wall admittance was ignored, while in others certain approximations were used. In this work the characteristic equation for the corrugated conical horn is numerically solved without an approximation for the wall admittance. The results obtained for the mode order variation with frequency is compared with other two frequency dependent solutions and the difference is clearly shown.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125836607","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
Broadbanding of a Submillimetre-Wave Backward-Wave Oscillator 亚毫米波后向波振荡器的宽带化
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332433
R. Bonnefoy, G. Kantorowicz, P. Palluel
{"title":"Broadbanding of a Submillimetre-Wave Backward-Wave Oscillator","authors":"R. Bonnefoy, G. Kantorowicz, P. Palluel","doi":"10.1109/EUMA.1977.332433","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332433","url":null,"abstract":"As a consequence of the interest shown by astronomers for observation on board a space platform in the submillimetre-wave range, the European Space Agency has initiated a research and development programme on components required for advanced submillimetre-wave heterodyne detection and particularly on the local oscillator. In order to cover the spectral range of interest (between about 0.3 and 1 mm) with as few components as possible, large tunability is required. Due to its continuous electronic tuning capability, a broadband BWO seems to be most appropriate choice. A design goal of 10 mW was selected in order not to limit unduly the choice of the detector-mixer, together with a tunability of 20% in the range 0.75 - 0.95 mm. A new tube model was devised and manufactured. Although every parameter has not been optimized, the above performances were obtained, up to 50 mW over most of the bandwidth. The power consumption (between 55 and 100 W) represents a large improvement with respect to existing submillimetre tubes.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115989682","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
Numerical Solution of the Aperture Field Integral Equation for a Wide Slot Backed by a Rectangular Cavity 矩形空腔后宽槽孔径场积分方程的数值解
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332379
Kari Suneli
{"title":"Numerical Solution of the Aperture Field Integral Equation for a Wide Slot Backed by a Rectangular Cavity","authors":"Kari Suneli","doi":"10.1109/EUMA.1977.332379","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332379","url":null,"abstract":"A two-dimensional vector integral equation for the tangential electric field distribution in a cavity-backed aperture is presented. The solution of the integral equation for a rectangular cavity by the method of moments is discussed. The expansion and testing functions are pulses in the direction of the electric field and triangles transverse to the direction of the electric field. Finally, the convergence of the solution is considered.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"212 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122643325","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
Fibre Optic Communication Systems 光纤通信系统
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332387
C. Sandbank
{"title":"Fibre Optic Communication Systems","authors":"C. Sandbank","doi":"10.1109/EUMA.1977.332387","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332387","url":null,"abstract":"The basic requirements for practical optical communication systems are reviewed. The construction and performance of some of the key constituents such as the fibre, cable, sources, connectors and splices are discussed. Particular emphasis is placed on the special properties of optical communication systems such as the economic advantage of wideband trunk communication, the immunity to electrical interference, and the high strength to weight ratio of the transmission medium. Details of a repeated 140 Mbit/s field demonstration over a 9 km route between Hitchin and Stevenage are given to illustrate the features of a comprehensive optical communication system.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122831548","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: 60
A One Megawatt, Seven Per Cent Bandwidth, Pulsed Klystron Amplifier 一兆瓦，百分之七带宽，脉冲速调管放大器
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332432
D. Perring, G. Phillips, J. Randall
{"title":"A One Megawatt, Seven Per Cent Bandwidth, Pulsed Klystron Amplifier","authors":"D. Perring, G. Phillips, J. Randall","doi":"10.1109/EUMA.1977.332432","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332432","url":null,"abstract":"The paper reports on aspects of the design of a broadband klystron amplifier currently going into production. The tube has a low interception gridded gun, an overlapping mode extended interaction output section and a seven cavity buncher section. The design of buncher section is discussed and compared with the practical results.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122031210","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
First Achieved 30 % P-N Junction GaAs Hi-Lo Impatt Diodes Having MTTF of 1011 Hours 首次实现了MTTF为1011小时的30% P-N结GaAs Hi-Lo输入二极管
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332470
K. Nishitani, H. Sawano, T. Ishii, S. Mitsui, K. Shirahata
{"title":"First Achieved 30 % P-N Junction GaAs Hi-Lo Impatt Diodes Having MTTF of 1011 Hours","authors":"K. Nishitani, H. Sawano, T. Ishii, S. Mitsui, K. Shirahata","doi":"10.1109/EUMA.1977.332470","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332470","url":null,"abstract":"By improving the carrier profile of a P-N junction GaAs IMPATT diode with a Hi-Lo structure, an efficiency of 30%, which is comparable to that of an excellent pt Schottky barrier type, has been first achieved. The diode showing the excellent 30% efficiency is depleted with the electric field of 20 kV/cm at the end of the drift region. The narrowed avalanche region and the reduced carrier concentration of the drift region enable the diode to operate at notably reduced bias voltage and current. Owing to the high reliability expected for the P-N junction type, the high efficiency and the low input power, output power of 3 watts is obtained with MTTF of 1011 hours.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122127352","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
Subnanosecond Operation of a Microstrip Optoelectronic Switch 微带光电开关的亚纳秒操作
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332478
R. Castagné, R. Laval, S. Laval, A. Meriau
{"title":"Subnanosecond Operation of a Microstrip Optoelectronic Switch","authors":"R. Castagné, R. Laval, S. Laval, A. Meriau","doi":"10.1109/EUMA.1977.332478","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332478","url":null,"abstract":"Experimental results and a theoretical model concerning optoelectronic switches are reported. These devices mainly consists in a microstrip line, deposited on a high resistivity semiconductor. The upper strip has a break which can be illuminated by a laser pulse. The latter generates an electron hole plasma of high density near the semiconductor surface allowing the signal transmission accross the gap. In order to verify some assumptions allowing further simplification to describe the operation of such devices, a numerical model has been derived. It leads to a simpler analytical model in which the inductive phenomena and the propagation process along the active part of the device are taken into account. These models have been compared to experimental results in the nanosecond range and allow to forecast the performances in the picosecond range.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114030796","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 3 GHz Radar Beacon ("Racon") using a Microwave Acoustic Delay Line 使用微波声学延迟线的3ghz雷达信标(“Racon”)
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332474
D. Abadie, M. de Vecchis, J. Puyhaubert
{"title":"A 3 GHz Radar Beacon (\"Racon\") using a Microwave Acoustic Delay Line","authors":"D. Abadie, M. de Vecchis, J. Puyhaubert","doi":"10.1109/EUMA.1977.332474","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332474","url":null,"abstract":"The design criteria for a S band Radar Beacon responding at the sole frequency of the interrogating radar are given. A microwave acoustic delay line is used to create the response of the beacon and the capability of encoding this response by a proper design of the delay line is shown. The choice of the components according to the desired characteristics is discussed. Results of laboratory and in-site tests are given, showing that such a beacon is usable in a navigational system.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124114348","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
Interacting Step Discontinuities in Planar Dielectric Waveguides 平面介质波导中的相互作用阶跃不连续
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332421
T. Rozzi
{"title":"Interacting Step Discontinuities in Planar Dielectric Waveguides","authors":"T. Rozzi","doi":"10.1109/EUMA.1977.332421","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332421","url":null,"abstract":"Planar dielectric waveguides play an important role in electro-optics. In many laser configurations and integrated optical components, grooves are etched in the planar surface or overlays are deposited on it. The step is an idealization of such a discontinuity. This paper has two aims. First, the field problem of an arbitrary large step under multimode excitation is solved by means of a rigorous variational approach. Step discontinuities however are seldom isolated. Mostly a cascade is employed. The second aim of the paper is to show how appropriately generalized methods of network theory can be applied to the rigorous analysis of such cascades, either finite or infinite, periodic or aperiodic.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131223449","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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