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1979 9th European Microwave Conference最新文献

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Design and Specification of a Broadband R.F. QPSK Modulator for an 11 GHz 140 Mbit/s Digital Radio System using MIC Techniques 基于MIC技术的11ghz 140mbit /s数字无线电系统宽带射频QPSK调制器设计与规范
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332707
R. Goodings, J. Robinson
{"title":"Design and Specification of a Broadband R.F. QPSK Modulator for an 11 GHz 140 Mbit/s Digital Radio System using MIC Techniques","authors":"R. Goodings, J. Robinson","doi":"10.1109/EUMA.1979.332707","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332707","url":null,"abstract":"The design of a broadband QPSK R.F. phase modulator for use in an 11 GHz 140 Mbit/s digital radio system is described, in which attention was given to achieving as large an instantaneous bandwidth as possible. A new switching accuracy specification for such modulators is outlined which is directly related to system requirements. The modulator described employs PIN diode switches serially connected on a single MIC. Cross-talk degradations inherent in this approach are negligible due to the very short transition times achieved. The unit operates without adjustment over a minimum of half the 10.7-11.7 GHz band, and maintains this performance over a temperature range of 10°-60°C. Good system performance has been demonstrated.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"4 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":"116885278","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
The Distributed Oscillator : A Solution for Power GaAs IMPATT Combining 分布式振荡器:功率砷化镓集成电路的一种解决方案
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332770
Y. Archambault
{"title":"The Distributed Oscillator : A Solution for Power GaAs IMPATT Combining","authors":"Y. Archambault","doi":"10.1109/EUMA.1979.332770","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332770","url":null,"abstract":"Multidiode distributed oscillators allow combining several high power GaAs Impatt diodes in a compact module. According to this principle, the diodes are strongly coupled to a low-Q resonant circuit. The modes and resonant frequencies depend heavily upon the diode reactances. The flat cavity combiner which is described involves special techniques for suppressing unwanted parasitic modes without absorbing power on the desired TM 010 mode. A four diode structure delivers 5 W around 10 GHz, with a nearly 100% power adding efficiency and a 400 MHz locking bandwidth for a 10 dB gain. At Ku band, power combining of six 2.5 W nominal GaAs diodes inside a dielectric circular cavity, is presented.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"65 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":"114648045","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
Frequency Errors in Sub-Nyquist Sampling of a Sine Wave in the Presence of Noise or Frequency Modulation 存在噪声或调频时正弦波亚奈奎斯特采样的频率误差
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332726
M. Sarhadi, C. Aitchison
{"title":"Frequency Errors in Sub-Nyquist Sampling of a Sine Wave in the Presence of Noise or Frequency Modulation","authors":"M. Sarhadi, C. Aitchison","doi":"10.1109/EUMA.1979.332726","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332726","url":null,"abstract":"In this paper frequency errors due to sub-Nyquist sampling of a sine wave in the presence of noise or frequency modulation are analysed. The results are computed for various input signal-to-noise ratios, input noise bandwidths and the frequency deviation of the microwave signals. These errors are of great interest in the field of microwave frequency measurement and instrumentation.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"22 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":"127225655","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
Magnetostatic Hole Modes 静磁空穴模式
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332731
J. Peuzin, J. Gay
{"title":"Magnetostatic Hole Modes","authors":"J. Peuzin, J. Gay","doi":"10.1109/EUMA.1979.332731","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332731","url":null,"abstract":"This letter deals with the general concept of magnetostatic modes that are localized around cavities bored in an infinite ferromagnetic medium. The particular case of a circular hole of infinite length inside a material whose magnetization is parallel to the hole axis is studied in some detail. By using an original experimental configuration, it is shown that such a hole supports a very simple fundamental mode which is closely related to the well‐known uniform precession of a ferromagnetic rod biased along its axis.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"35 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":"126348713","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
Developments in Microwave Holographic Imaging 微波全息成像的研究进展
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332678
A. Anderson
{"title":"Developments in Microwave Holographic Imaging","authors":"A. Anderson","doi":"10.1109/EUMA.1979.332678","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332678","url":null,"abstract":"The evolution of microwave imaging is traced from its origin as a primitive analogue of optical holography to its present stage as a diagnostic imaging technique in its own right. The essential operations comprising data acquisition, data processing and display are described in terms of techniques in current use. New results from two applications which. have already demonstrated some potency - reflector antenna aperture and profile measurements and the imaging of sub-surface pipes and cables - are given. Recent approacges to microwave data processing including superresolution, `in-line' holography, and three-dimensional image construction, are also presented.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"5 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":"124908776","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: 8
Microwave Techniques in the Diagnosis and Treatment of Cancer 微波技术在癌症诊断和治疗中的应用
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332674
J. Edrich
{"title":"Microwave Techniques in the Diagnosis and Treatment of Cancer","authors":"J. Edrich","doi":"10.1109/EUMA.1979.332674","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332674","url":null,"abstract":"Naturally emitted thermal radiation of the human body at cm and mm wavelengths can be utilized to image subcutaneous temperature distributions and detect thermally active tumors. Contacting thermographs that were developed for such point-by-point measurements at long cm wavelengths are compared with remotely focussed, imaging thermographs for short cm and mm wavelengths in regard to instrumentation, measurement methods and clinical results in the detection of breast cancer and other tumors. For treatment of cancer microwave irradiation can produce hyperthermia in a more localized region than conventional methods. Various forms of controlling hyperthermia using subcutaneous probes are discussed, and potentials. preliminary animal experiments and limitations of new forms of noninvasive controls using microwave radiometry are given.","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":"125651664","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
Waveguides for Microwave Integrated Circuits 微波集成电路用波导
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332653
J. Hinken
{"title":"Waveguides for Microwave Integrated Circuits","authors":"J. Hinken","doi":"10.1109/EUMA.1979.332653","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332653","url":null,"abstract":"A new integrated fabrication process for microwave circuits is presented basing on waveguides as transmission lines. On principle they are dielectric filled waveguides of about semicircular cross-section. They are manufactured by warming up a thermo-plastic dielectric rectangular strip on a metal plate until it begins to flow and assumes the desired cross-section. Then the strip on the plate is evaporated with a metal layer, the thickness of which is enlarged by electroforming. When compared to other new MIC types the main advantages are the absent radiation loss in bends, space saving design possibilities at acceptable waveguide attenuation. A directional coupler made in this new technology shows the feasibility of the proposed process. Results of measurements near 40 GHz are shown.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"113 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":"116545603","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
High Power X-Band GaAs Field Effect Transistors 大功率x波段砷化镓场效应晶体管
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332711
B. Hewitt, R. C. Ellis, Richard P. Thomas, R. Healy, M. Benedek
{"title":"High Power X-Band GaAs Field Effect Transistors","authors":"B. Hewitt, R. C. Ellis, Richard P. Thomas, R. Healy, M. Benedek","doi":"10.1109/EUMA.1979.332711","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332711","url":null,"abstract":"Design considerations and processing techniques related to high power X-band GaAs field effect transistors will be presented. Particular emphasis will be placed on the problems associated with common lead inductance, gate-drain breakdown voltage and thermal resistance. The microwave performance of large periphery designs (up to 10 mms) will be reported. The superior performance of via-hole source connected devices with integral plated heat sinks will be stressed.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"21 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":"134476659","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
Remote Sensing of Terrain with a Microwave Scatterometer Having an Adjustable Complex Polarisation Response 具有可调复极化响应的微波散射计遥感地形
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332666
S. Simpson, B. Chambers
{"title":"Remote Sensing of Terrain with a Microwave Scatterometer Having an Adjustable Complex Polarisation Response","authors":"S. Simpson, B. Chambers","doi":"10.1109/EUMA.1979.332666","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332666","url":null,"abstract":"A remote sensing technique, based upon the measurement of three complex reflection coefficients, is discussed and shown to facilitate the characterisation of a scattering surface as a function of the incident polarisation. An experimental microwave scatterometer is described and typical results obtained from terrain are presented.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"24 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":"133240417","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
Theoretical Study of Circular Waveguide Latching Phaser 圆波导锁相器的理论研究
1979 9th European Microwave Conference Pub Date : 1979-10-01 DOI: 10.1109/EUMA.1979.332732
K. Ivanov
{"title":"Theoretical Study of Circular Waveguide Latching Phaser","authors":"K. Ivanov","doi":"10.1109/EUMA.1979.332732","DOIUrl":"https://doi.org/10.1109/EUMA.1979.332732","url":null,"abstract":"The propagation of angular symmetrical TE mode in an infinitely long perfectly conducting circular waveguide, loaded with cylindrically stratified isotropic dielectric and latching ferrite, magnetised azimuthally to remanence, is studied theoretically. The transcendental characteristic equations of two remanent phaser configurations, valid for arbitrary range of remanent magnetization and permittivity of dielectric filling are derived in terms of Kummer and Tricomi confluent hypergeometric functions of pure imaginary argument, Bessel and Neumann functions. A tabulation of zeros of Kummer function is performed, useful for numerical computations. The nonreciprocal phase characteristics of a cylindrical guide, completely filled with azimuthally magnetised remanent ferrite and propagating TE mode are presented in normalized form for the two latched states of magnetization.","PeriodicalId":128931,"journal":{"name":"1979 9th European Microwave Conference","volume":"33 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":"114746753","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
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