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1976 6th European Microwave Conference最新文献

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Applications of GTD to Antenna Problems GTD在天线问题中的应用
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332248
K. Pontoppidan
{"title":"Applications of GTD to Antenna Problems","authors":"K. Pontoppidan","doi":"10.1109/EUMA.1976.332248","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332248","url":null,"abstract":"A general computer program package based on the geometrical theory of diffraction (GTD) is presented. The programs are based on a modular approach such that a complex geometry is broken down into smaller and simpler substructures. The applicability of the program package is illustrated by a number of examples ranging from dipole antennas mounted on simple geometrical structures to reflector antenna systems. A GTD-solution for a circular symmetric focus-fed reflector antenna is compared to a physical optics solution. It turns out, that with a uniform aperture illumination the two methods give almost identical results in the complete side-lobe region. The results expected for more realistic illuminations are discussed.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115033902","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
Millimeter Impatt Amplifier Optimization for Telecommunication Systems 电信系统中毫米波输入放大器的优化
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332330
I. Doumbia, J. De Jaeger, G. Salmer
{"title":"Millimeter Impatt Amplifier Optimization for Telecommunication Systems","authors":"I. Doumbia, J. De Jaeger, G. Salmer","doi":"10.1109/EUMA.1976.332330","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332330","url":null,"abstract":"High and moderate power Ka-Band (33-40 GHz) Impatt diode amplifiers for use especially in telecommunication systems have been investigated. We point out the means of obtaining optimal conditions (for SDR or DDR diode parameters and operating conditions) for the principal amplifier characteristics : gain-bandwidth product, output power levels, group delay variations, AM-PM conversion rates. The theoretical results achieved, corroborated by the experimental ones, show the excellent behaviour of these Impatt amplifiers operating in telecommunication systems.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114622742","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 Modular Multiplexer Operating Simultaneously in Four Frequency Bands with Two Linear Orthogonal Polarization Each 一种同时工作于四个频带的模块化多路复用器，每个频带有两个线性正交偏振
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332320
P. Magne, N. Bui-Hai
{"title":"A Modular Multiplexer Operating Simultaneously in Four Frequency Bands with Two Linear Orthogonal Polarization Each","authors":"P. Magne, N. Bui-Hai","doi":"10.1109/EUMA.1976.332320","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332320","url":null,"abstract":"A multiplexer using quasi-optical filters, directional couplers, Tchebischeff and Butterworth filters and orthomode transducer, can operate simultaneously in four CCIR frequency bands for Microwave links : - One half 3.6 - 4.2 GHz frequency plan for Radio Links carrying 1800 telephone channels - One half 5.925 - 6.425 GHz frequency plan for Radio Links carrying 1800 telephone channels (CCIR Rec. 382.1) - One half 6.43 - 7.11 GHz frequency plan for Radio Links carrying 2700 telephone channels (CCIR Rec. 384.1) - One half 10.7- 11.7 GHz frequency plan for Radio Links carrying 1800 telephone channels (CCIR Rec. 387.1)","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116610604","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
Detailed Investigation on the Group-Type Unidirectional Inter-Digital SAW Transducer with its Application to Low Insertion Loss Surface Wave Filters 群型单向跨数SAW换能器及其在低插入损耗表面波滤波器中的应用研究
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332284
F. Nyffeler
{"title":"Detailed Investigation on the Group-Type Unidirectional Inter-Digital SAW Transducer with its Application to Low Insertion Loss Surface Wave Filters","authors":"F. Nyffeler","doi":"10.1109/EUMA.1976.332284","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332284","url":null,"abstract":"Filters employing the standard two-transducer configuration have an inherent 6 dB minimum insertion loss due to bidirectionality. Furthermore, they show a strong passband ripple owing to various reflections between the electrodes. In this paper, the applicability to very low insertion loss SAW filters of a recently proposed group-type unidirectional inter-digital transducer (GTIDT) is examined. Good agreement was found between theoretical and experimental data. A filter with minimum insertion loss of 1 dB without tuning and a passband ripple of less than 0.2 dB could be fabricated.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130051002","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
Microwave Imaging of Rotating Objects with Narrowband Signals 旋转物体窄带微波成像
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332250
H. Gniss, K. Magura
{"title":"Microwave Imaging of Rotating Objects with Narrowband Signals","authors":"H. Gniss, K. Magura","doi":"10.1109/EUMA.1976.332250","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332250","url":null,"abstract":"The experimental investigations as described in this paper are based upon the evaluation of image-field distributions from the scattered fields of rotating objects measured at 36 GHz. Starting with a discussion of the reconstructing formalism and a suitable conversion into Fourier integral form, which is not restricted on small angular ranges, some illustrative examples of reconstruction for simple shaped objects (circular cylinders and flat plates) as well as for a more complex object in the plane of rotation are shown. The effects on the image quality due to various angular ranges used for the computer-aided reconstruction, and problems arising from fictive scattering centers, as a consequence of multiple scattering between various object parts, are discussed.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127982640","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
Coplanar Lines : Application to Broadband Microwave Integrated Circuits 共面线:在宽带微波集成电路中的应用
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332244
M. Houdart
{"title":"Coplanar Lines : Application to Broadband Microwave Integrated Circuits","authors":"M. Houdart","doi":"10.1109/EUMA.1976.332244","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332244","url":null,"abstract":"The paper begins with a brief review of some of the shortcomings of the microwave microcircuit techniques most widely used in research and industry (e.g. microstrip, suspended stripline, and slot line). This is followed by a discussion of the advantages likely to be associated with the utilization of the coplanar line technique. The propagation characteristics are then determined using a digital calculation program. Finally, several applications are discussed involving or impedance matchers capable of operating at Ku-band frequencies.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"23 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129026567","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: 88
Calculation of Microstrip Lines by Means of Singular Integral Equations 用奇异积分方程计算微带线
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332348
V. Ivashka, Ju. Lauchius, V. Shugurov
{"title":"Calculation of Microstrip Lines by Means of Singular Integral Equations","authors":"V. Ivashka, Ju. Lauchius, V. Shugurov","doi":"10.1109/EUMA.1976.332348","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332348","url":null,"abstract":"In case of homogeneous filling the electromagnetic field of the lowest mode in a microstrip line is transverse and can be described by harmonic functions. If the filling is piecewise homogeneous the longitudinal components of electric and magnetic fields arise for lower frequencies being much less than transverse ones. This allows one to use the approximation of transverse electromagnetic waves. The idea of the proposed method is to represent the potential in the form of a Cauchy type integral. Thus the differential equations are satisfied. Then the boundaryr conditions lead to singular integral equations [ I]. We used to solve the equations numerically. In some simplest cases it is possible to get a solution in an analytical form. The main advantages of a method are: I. The method reduces the solution of a two-dimensional problem to one-dimensional one drasticadly shortening computer time. 2. The algorithm of the solution and the form of the equations don't depend on the shape of the line cross section. 3. The conduct of the solution in angular points rigorously corresponds to the static one. 4. From the computational point of view it appeared to be more convenient to apply the method to the line having real geometrical sizes (say finite thickness of a strip). If one considers a line having infinitely thin strips it is convenient to use the representation by Muskhelishvili","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122815214","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
Experimental Determination of Slowness Curves of Acoustic Surface Waves on Anisotropic Media 各向异性介质中声表面波慢度曲线的实验测定
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332280
F. Pirio, M. Sinou
{"title":"Experimental Determination of Slowness Curves of Acoustic Surface Waves on Anisotropic Media","authors":"F. Pirio, M. Sinou","doi":"10.1109/EUMA.1976.332280","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332280","url":null,"abstract":"Diffraction effects are important in many acoustic surface wave (a.s. w) devices : delay lines, acoustic lenses, apodized filters, helical long delay lines... If the slowness curve (i.e dependance of the slowness with propagation direction) is known, theoritical prediction of these effects can be done. But in some important cases, such as Li Nb 03, the cristalline constants are not known with a sufficient precision to permit an accurate computation of the slowness curve. Two global experimental methods can be used to determine the slowness.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122841138","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
Theory and Design of Medium Gain Dielectric Antennas 中增益介质天线的理论与设计
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332268
L. Ligthart, C.J. den Hollander
{"title":"Theory and Design of Medium Gain Dielectric Antennas","authors":"L. Ligthart, C.J. den Hollander","doi":"10.1109/EUMA.1976.332268","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332268","url":null,"abstract":"Double application of the Kirchhoff-Huygens-vector formula facilitates computation of the far field radiation pattern of dielectric antennas with rotational symmetry excited by cylindrical waveguides within practical computing times. In this paper special attention will be given to the near field expressions at the surface of the dielectric body, when higher order modes can propagate in the waveguide. These near field expressions allow a more analytical approach for the far field expressions. In designing medium gain dielectric antennas it would appear that the front of the dielectric works approximately like a lens and simple optical relations may be used for derivation of the curvature of the dielectric body. This computational method has formed the basis for designing a dielectric antenna with properties similar to those of a corrugated horn.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127507338","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
Design of Low Loss 12 GHz Output Multiplexer for the Second Generation Telesat Canada Satellite 第二代加拿大远程卫星低损耗12ghz输出多路复用器设计
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332247
S. Kallianteris
{"title":"Design of Low Loss 12 GHz Output Multiplexer for the Second Generation Telesat Canada Satellite","authors":"S. Kallianteris","doi":"10.1109/EUMA.1976.332247","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332247","url":null,"abstract":"The basic design considerations for the 12 GHz low loss TE103 filters are described. The synthesis, optimization and realization of a new type low loss non-contiguous triplexer which uses the above filters and a WR75 manifold is presented. Test results of an engineering model unit currently being qualified for use in the F-4 Telesat Canada communications satellite are also provided, and are in good agreement with the calculated ones. The measured unloaded Q'S of the 4 pole TE103 dual mode elliptic filters used are well over 9,000.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126749926","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
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