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1976 6th European Microwave Conference最新文献

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A New Look at the Integral Equation Solution of High Frequency Diffraction Problems 高频衍射问题积分方程解的新认识
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332253
R. Mittra
{"title":"A New Look at the Integral Equation Solution of High Frequency Diffraction Problems","authors":"R. Mittra","doi":"10.1109/EUMA.1976.332253","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332253","url":null,"abstract":"In this paper we report a transform method for combining the integral equation and high frequency asymptotic techniques, e.g., the geometrical theory of diffraction or GTD. The method takes advantage of the fact that the Fourier transform of the unknown surface current distribution is proportional to the scattered far field. Two methods are developed for systematically improving the initial form of the high frequency asymptotic solution by manipulating the integral equation in the Fourier transform domain. Two salient features of the transform method are that it provides a convenient validity check of the solution and that it yields both the induced surface current density as well as the far field. Several illustrative examples that demonstrate the usefulness of the approach for handling a variety of electromagnetic scattering problems in the resonance region and above, and comparison with other methods are included in this paper.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"15 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":"130393431","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
Reduced Coupling Aperture of Microstrip Stubs Provides New Aspects in Stub Filter Design 微带短节的减小耦合孔径为短节滤波器的设计提供了新的思路
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332242
G. Kompa
{"title":"Reduced Coupling Aperture of Microstrip Stubs Provides New Aspects in Stub Filter Design","authors":"G. Kompa","doi":"10.1109/EUMA.1976.332242","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332242","url":null,"abstract":"Generally microstrip stubs are coupled galvanically over the whole cross-section of the adjoining main lines. Reducing the coupling aperture two effects can be observed being superimposed: Smaller coupling apertures lead to higher skirt selectivity, increase, however, the excitation of higher-order modes in the main lines. The resulting transmission characteristics seem to provide new applications in stub filter design.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"78 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":"123010227","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
The Peripheral or Edge-Guidedmodeson the Inhomogeneously and Homogeneously Ferrite Loadedstripline 非均匀和均匀铁氧体加载带状线的外围或边缘导向模型
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332336
D. Bolle
{"title":"The Peripheral or Edge-Guidedmodeson the Inhomogeneously and Homogeneously Ferrite Loadedstripline","authors":"D. Bolle","doi":"10.1109/EUMA.1976.332336","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332336","url":null,"abstract":"The results of a rigorously formulated solution of the edge-guided mode on inhomogeneouslyand homogeneously ferrite loaded stripline are presented. The assumption that the width of the stripline is sufficiently large so that interaction between the edges may be neglected, has been invoked. In addition, it is assumed that the central strip conductor is located centrally between the ground plane and the shielding plate. This high degree of symmetry leads to a canonial geometry where we have a groundplane supporting a substrate of ferrite (x>o) and dielectric (x<o) or of ferrite alone. The substrate, in turn, supports a conducting half plane for x>o.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"3 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":"123652325","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: 5
Noise Suppression in Microwave Imagery by Exploitation of the MTF Approach to Human Vision 利用人类视觉的MTF方法抑制微波图像中的噪声
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332256
A. Anderson, P. Armstrong, J. Bennett, J. Mayhew
{"title":"Noise Suppression in Microwave Imagery by Exploitation of the MTF Approach to Human Vision","authors":"A. Anderson, P. Armstrong, J. Bennett, J. Mayhew","doi":"10.1109/EUMA.1976.332256","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332256","url":null,"abstract":"Optimised presentation of images from a microwave holographic system is essential, particularly the suppression of the effects of noise on the human visual system. Recent research into the human visual system has led to Fourier models of the visual cortex, and the proposition that object recognition is possible on relatively few critical low spatial frequency components. It is therefore possible to suppress interfering noise without losing essential object information by designing a suitable filtering function compatible with the human modulation transfer function, noise and object spectral distributions. A technique is described in which an unrecognizable microwave image distribution is processed to yield a clearly identifiable target shape.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"3 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":"122091767","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
Acoustic Surface Wave and Charge Transfer Devices in Some Signal Processing Applications 声表面波和电荷转移器件在某些信号处理中的应用
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332276
J. Hénaff
{"title":"Acoustic Surface Wave and Charge Transfer Devices in Some Signal Processing Applications","authors":"J. Hénaff","doi":"10.1109/EUMA.1976.332276","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332276","url":null,"abstract":"Both acoustic surface wave and charge transfer devices technologies are now maturing. The present paper presents a survey of few analog applications restricted to civil communication systems. Actually, the input signal is delayed and weighted in the same way in both devices. This yields two very important applications, i.e. delay lines and filters. In spite of disjoined frequency operation fields, the design of these functions are very similar in the two technologies and leads also to similar achievements in terms of BT product, dynamic range, etc... The present applications and the complementarity of both techniques are described.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"118 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":"122495343","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
GaAs Power Mesfet Amplifier Design GaAs功率介面效应放大器设计
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332346
J. A. Angus, D. Abbott, E. Kelly
{"title":"GaAs Power Mesfet Amplifier Design","authors":"J. A. Angus, D. Abbott, E. Kelly","doi":"10.1109/EUMA.1976.332346","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332346","url":null,"abstract":"GaAs power MESFETs capable of producing in excess of 600 mW with 6 dB gain and 33% power added efficiency at 8 GHz have been produced. The use of these devices in amplifiers for S, C and X-bands will be described. Techniques for effective heat sinking whilst maintaining low parasitics will be discussed together with the characterisation of the devices, including a technique for measuring device 'S' parameters under pulse bias conditions. Examples of amplifiers for the 2.7 GHz to 3.3 GHz band and the 5.0 GHz to 5.5 GHz band will be presented. A 9.5 GHz amplifier using one micron gate length power FETs will be described.","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":"122859587","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
Open Semiconductor Waveguide for Millimeter Wave Application 毫米波应用的开放式半导体波导
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332313
R. Karg, H. Ermert, H. Brand, G. Appelhans
{"title":"Open Semiconductor Waveguide for Millimeter Wave Application","authors":"R. Karg, H. Ermert, H. Brand, G. Appelhans","doi":"10.1109/EUMA.1976.332313","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332313","url":null,"abstract":"A rectangular dielectric semiconductor waveguide is theoretically investigated by transverse mode matching methods. In an experiment the resistivity of the semiconductor material is changed by illuminating with a GaAs laser beam. Depending on the configuration and intensity of the light spot the waveguide behaves like a termination or a short. This effect is controllable in position and time. In a further step the radiation from a local inhomogeneity in an open structure is intentionally used for generating a light-controlled radiating element.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"49 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":"129322258","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
Beam-Waveguide Feed for Satellite Communication Earth Station with Frequency-Reuse 频率复用的卫星通信地面站波束波导馈电
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332267
J. Roger, C. Aubry, J. Poitevin
{"title":"Beam-Waveguide Feed for Satellite Communication Earth Station with Frequency-Reuse","authors":"J. Roger, C. Aubry, J. Poitevin","doi":"10.1109/EUMA.1976.332267","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332267","url":null,"abstract":"This paper describes the analysis, design and experimental evaluation of a Beam-waveguide feed for satellite communication earth station with frequency reuse, in the 11/14 GHz band. A theorical model is presented which accounts for the electromagnetic behaviour of the system by means of simple formulas and results in a simple synthesis procedure. Numerical results for a more refined analysis are presented. Experimental results are presented as well as main expected secondary performances.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"75 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":"121362067","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
Dielectric Wafer Filters in Waveguide 波导介质晶圆滤波器
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332246
B. Nicholson, B. Watson
{"title":"Dielectric Wafer Filters in Waveguide","authors":"B. Nicholson, B. Watson","doi":"10.1109/EUMA.1976.332246","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332246","url":null,"abstract":"Filters comprising dielectric wafers in TE10 mode rectangular, and TE01 mode circular or semi-circular waveguides are described. Their suitability for use in overmoded guides and for high power levels is explained. Design procedures and a computer optimisation process are formulated which allow wafers of standard thickness to be used. Examples of applications in a band-branching unit for a circular waveguide millimetric communications system, and a high power diplexer are given. Good agreement between computed and measured results has been obtained and constructional details and performance figures are presented.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"63 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":"126664853","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
"The Field Focusing Filter" a Novel form of Microwave Band Branching Filter “场聚焦滤波器”是一种新型的微波带分支滤波器
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332243
D. Davies, A. Y. Niazi
{"title":"\"The Field Focusing Filter\" a Novel form of Microwave Band Branching Filter","authors":"D. Davies, A. Y. Niazi","doi":"10.1109/EUMA.1976.332243","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332243","url":null,"abstract":"The paper describes a new form of microwave branching filter which may be realised in either waveguide or a microstrip form. The filter incorporates a semicircular non resonant cavity in which the various output frequency bands are focused to emerge at different output ports. This concept can provide a large number of matched output channels without the use of circulators and the shape of the output frequency responses can be varied by control of the geometry of the filter design. Theoretical and experimental results are presented for prototype filter units operating at different microwave frequencies. Proposals are made to incorporate electronic control of bandwidth and centre frequency of such filters.","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":"130611613","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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