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1979 9th European Microwave Conference最新文献

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A Two-Reflector Beam Waveguide Feed for Intelsat-A Ground-Station Antennas with Frequency Reuse Operation 频率复用Intelsat-A地面站天线的双反射波束馈源
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332689
U. Leupelt
{"title":"A Two-Reflector Beam Waveguide Feed for Intelsat-A Ground-Station Antennas with Frequency Reuse Operation","authors":"U. Leupelt","doi":"10.1109/EUMA.1979.332689","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332689","url":null,"abstract":"A beamwaveguide feed system for large groundstation antennas composed of only two beam reflectors is described. It is fully capable of 4/6 GHz frequency reuse operations. After discussing the main design principles the RF-properties of the beam waveguide are demonstrated by scale model measurements. The mechanical realization of the original feed components and the essential electrical parameters (gain, radiation patterns, crosspolarization isolation) of a recently completed 32m-Cassegrain-antenna are presented.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134580510","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
Thin Film Transfer Components for Cheap MICs 用于廉价麦克风的薄膜传输元件
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332651
E. England
{"title":"Thin Film Transfer Components for Cheap MICs","authors":"E. England","doi":"10.1109/EUMA.1979.332651","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332651","url":null,"abstract":"A solution to the problem of pattern definition, which sometimes exists in the production of cheap MICs, is described. The process (l) involves the transfer of high definition, thin film style, component patterns from a carrier to the main substrate. The concept allows common substrates to be tailored to individual requirements and promises the use of low cost MICs to be extended in frequency. The performance of components transferred into thick film and copper laminate style circuits is compared with wholly thin film constructed items.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"2020 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133557487","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
Scattering of Plane and Guided Waves from Composite Dielectric Bodies 平面波和导波在复合介质中的散射
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332759
J. Fikioris, N. Uzunoglu
{"title":"Scattering of Plane and Guided Waves from Composite Dielectric Bodies","authors":"J. Fikioris, N. Uzunoglu","doi":"10.1109/EUMA.1979.332759","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332759","url":null,"abstract":"Scattering from eccentrically stratified spheres and infinite cylinders is considered. For a dielectric slab waveguide the scattering of a guided mode froman internal cylindrical cal inhomogeneity is also treated. For the case of a spherical (cylindrical) inhomogeneity embedded inside a dielectric sphere(cylinder) the method of separation of variables is used in conjuction with translational addition theorems for spherical vector waves(cylindrical waves). On the other hand, an integral equation involving the appropriate Green's function is employed for the problem of scattering from inhomogeneities inside a dielectric slab guide.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133324087","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 Novel High Speed A/D Conversion Technique using a Voltage Controlled Oscillator and a Microwave Digital Discriminator 一种采用压控振荡器和微波数字鉴别器的高速A/D转换技术
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332762
A. Akademir, C. Aitchison
{"title":"A Novel High Speed A/D Conversion Technique using a Voltage Controlled Oscillator and a Microwave Digital Discriminator","authors":"A. Akademir, C. Aitchison","doi":"10.1109/EUMA.1979.332762","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332762","url":null,"abstract":"A very high speed A/D conversion teahnique potentially suitable for video and radar applications is described [1]. The new teahnique combines two existing microwave components, a voltage-controlled oscillator and a digital frequency discriminator. The digital discriminator output gives parallel bits directly in Gray code form, eliminating the costly and complex encoding logic circuits of conventional fast AID conversion techniques. Only n comparators are required for an n-bit word and the basic advantage of the teahnique is that the complex logic operations of the parallel (or flash) baseband approaah are eliminated. Experimental performance of a 4-bit A/D converter using the new teahnique at a low frequency is given confirming the validity of the principle.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117203099","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
Spaceborne K-Band Parametric Amplifiers : Present and Future 星载k波段参数放大器:现在与未来
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332643
A. D'ambrosio
{"title":"Spaceborne K-Band Parametric Amplifiers : Present and Future","authors":"A. D'ambrosio","doi":"10.1109/EUMA.1979.332643","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332643","url":null,"abstract":"The paper discusses some peculiar aspects of spaceborne paramps. An operational unit, operating at 14 GHz, is described with some detail. Recent developments at 20 GHz and at 30 GHz are likewise presented and discussed. Finally some conclusions are drawn.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122924811","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
Loaded Q-Factors of Partial-Height and Full-Height Triangular Resonators for Use in Waveguide Circulators 用于波导环行器的部分高度和全高度三角形谐振器的负载q因子
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332740
G. Riblet, J. Helszajn, B. O'Donnell
{"title":"Loaded Q-Factors of Partial-Height and Full-Height Triangular Resonators for Use in Waveguide Circulators","authors":"G. Riblet, J. Helszajn, B. O'Donnell","doi":"10.1109/EUMA.1979.332740","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332740","url":null,"abstract":"Except for some data on single and coupled, quarter-wave long, disk resonators operating in the waveguide turnstile mode, very little information is available on the loaded Q-factor of directly coupled resonators for use in the design of waveguide circulators. This paper investigates the dependence of the loaded Q-factor of resonators with triangular configuration on the orientation of its side dimension with respect to the output waveguide of the circulator. Coupling to the apex of the resonator corresponds to a lower value for the loaded Q-factor than is the case for coupling midway along its side. However, the difference is not as pronounced as in the case of stripline circuits. This work suggests that the apex coupled partial-height triangular rather than disk resonator may be the preferred geometry for use in the design of quarter-wave coupled waveguide circulators using single quarter-wave long resonators.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123174777","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: 7
Microwave Moisture Measurement System 微波水分测量系统
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332725
J.M. Ozamiz, S. J. Hewitt
{"title":"Microwave Moisture Measurement System","authors":"J.M. Ozamiz, S. J. Hewitt","doi":"10.1109/EUMA.1979.332725","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332725","url":null,"abstract":"A microwave moisture-measuring system based on phase (dielectric constant) monitoring is described. The system is insensitive to amplitude variations and is being mechanically integrated with a production line. A strip-line sensor configuration is used. It has been designed having in mind a particular application, the monitoring and control of the moisture content of a moving stream of tobacco, but it could be equally applied to other materials or production processes.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128060960","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
New Approach to Designing Broadband GaAs FET Amplifiers for Optimum Large-Signal Gain Performance 为获得最佳大信号增益性能而设计宽带GaAs场效应管放大器的新方法
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332715
C. Rauscher, H. A. Willing
{"title":"New Approach to Designing Broadband GaAs FET Amplifiers for Optimum Large-Signal Gain Performance","authors":"C. Rauscher, H. A. Willing","doi":"10.1109/EUMA.1979.332715","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332715","url":null,"abstract":"An accurate direct method is described for designing broadband GaAs FET amplifiers for optimum power gain performance. The theoretical background of the approach together with experimental verification is given. A power amplifier example is included for illustration.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128604771","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
Microwave Power for Thermonuclear Fusion Machines 热核融合机的微波功率
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332677
G. Mourier
{"title":"Microwave Power for Thermonuclear Fusion Machines","authors":"G. Mourier","doi":"10.1109/EUMA.1979.332677","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332677","url":null,"abstract":"Present experimental machines used in research on controlled thermonuclear fusion require additional power of a few or many megawatts for a few seconds. Although experiments with energetic neutral beams are progressing satisfactorily, this technique may not be feasible in large machines. RF waves can also be used, in several frequency bands, and plasma physicists are working to solve the problems of coupling the power to the plasma and dissipating it there. The general problems of generators are briefly outlined, and those of the RF-window and the collectors of the electron tubes are discussed in more detail. The present possibilities of amplitrons and klystrons are indicated. These tubes are capable of producing the frequencies corresponding to the so-called lower hybrid resonance (LHR) in the plasma. Also discussed are the ways of increasing the efficiency of klystrons above 65%. The gyrotron, a millimetric-wave tube that can excite the electron cyclotron resonance (ECR) is presented and discussed in a similar way. It is apparent that technical difficulties are associated with the plasma at lower frequencies and with the electron tubes at higher frequencies.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117048702","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
Spectral Domain Immittance Approach for Dispersion Characteristics of Shielded Microstrips with Tuning Septums 带调谐隔膜的屏蔽微带色散特性的谱域阻抗法
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332743
T. Itoh
{"title":"Spectral Domain Immittance Approach for Dispersion Characteristics of Shielded Microstrips with Tuning Septums","authors":"T. Itoh","doi":"10.1109/EUMA.1979.332743","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332743","url":null,"abstract":"A method for deriving dispersion relations in a new versatile MIC transmission line, a microstrip line with tuning septums, is developed based on the spectral domain immittance matrix. Formulation is accomplished almost by inspection. Some examples of numerical results are included.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"20 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125770624","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: 29
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