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1990 20th European Microwave Conference最新文献

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A New Class of Scannable Millimeter-Wave Antennas 一类新型可扫描毫米波天线
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336174
A. Oliner
{"title":"A New Class of Scannable Millimeter-Wave Antennas","authors":"A. Oliner","doi":"10.1109/EUMA.1990.336174","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336174","url":null,"abstract":"The complexity usually associated with scanning arrays at millimeter wavelengths produces fabrication difficulties, so that alternative methods are needed that employ simpler structures. This paper describes such an alternative scanning approach, and presents a group of new and simpler radiating structures suitable for millimeter-wave applications. Additional significant advantages are that the radiation has negligible cross polarization, no blind spots and no grating lobes. The theoretical analyses for all of the antenna structures are accurate and yield dispersion relations in closed form for most of them; the array analyses take all mutual coupling effects into account. For two of the antennas, measurements have also been taken that show very good agreement with the theory.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125582032","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: 33
Ultra Broadband Extended Dynamic Range MMIC DLVA 超宽带扩展动态范围MMIC DLVA
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336187
D. Ariel, J. Lacombe
{"title":"Ultra Broadband Extended Dynamic Range MMIC DLVA","authors":"D. Ariel, J. Lacombe","doi":"10.1109/EUMA.1990.336187","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336187","url":null,"abstract":"Design, fabrication and experimental results of a 2 to 18 GHz high dynamic range MMIC DLVA featuring short recovery time are presented. This fast DLVA is a Successive Detection Logarithmic Amplifier. The microwave part consists of five 2-18 GHz GaAs MMIC stages ; each stage is composed of MMIC amplifiers, active power divider, attenuator and Schottky detector. Detected outputs levels are video limited before summation to obtain a logarithmic video response over a 65 dB extended dynamic range. No use of logarithmic video amplifier ensure short recovery time less than 200 ns over the whole dynamic range.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"228 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123187043","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
Microwave and Millimetre-Wave Staring Array Technology 微波和毫米波凝视阵列技术
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336085
C. Alder, P.R.C. Collins, R. Davis, R. Hodges, L. Irving, J. Warner, A. Webb
{"title":"Microwave and Millimetre-Wave Staring Array Technology","authors":"C. Alder, P.R.C. Collins, R. Davis, R. Hodges, L. Irving, J. Warner, A. Webb","doi":"10.1109/EUMA.1990.336085","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336085","url":null,"abstract":"This paper describes a multiple-beam, focal plane array technology which has evolved from microwave lens-fed receiver research, and has been developed to demonstrate a 35 GHz staring array radar. The key features of any sensor which exploits this technology are that it has no moving parts, and can accurately \"look\" in many independent directions simultaneously. In addition the arrays are based on integrated circuitry with the potential for full monolithic implementation in low cost silicon or GaAs. Associated research has shown that scaled versions of the technology are applicable to a range of operating frequencies from below 10 GHz up to 94 GHz. It therefore represents a less complex alternative to phased array technology for higher frequencies, and offers considerable advantages over conventional, mechanically scanned sensor hardware in terms of performance, cost, volume, weight, and reliability.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114134255","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
Performance of a Spherical Array Antenna Fabricated by Vacuum Forming Technique 真空成形技术制备球面阵列天线的性能研究
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336282
W. Chujo, Y. Konishi, Yukio Ohtaki, K. Yasukawa
{"title":"Performance of a Spherical Array Antenna Fabricated by Vacuum Forming Technique","authors":"W. Chujo, Y. Konishi, Yukio Ohtaki, K. Yasukawa","doi":"10.1109/EUMA.1990.336282","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336282","url":null,"abstract":"In this paper, a spherical array antenna applicable to mobile satellite communications is discussed. The beam scanning characteristics of the directive gain of spherical and planar arrays are examined by computer simulation, and it is shown that the gain reduction of a spherical array is suppressed about 2 dB at a scan angle of 60° compared with that of a planar array. Mechanical and electrical performance of a vacuum formed hemispherical array is introduced. Experiment results show the feasibility of easily fabricated conformal arrays with good electrical performance.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114191441","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
Results of Olympus 20 and 30 GHz Beacon Measurements 奥林巴斯20和30 GHz信标测量结果
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336116
J. R. Larsen
{"title":"Results of Olympus 20 and 30 GHz Beacon Measurements","authors":"J. R. Larsen","doi":"10.1109/EUMA.1990.336116","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336116","url":null,"abstract":"Results of concurrent 20 and 30 GHz measurements with radiometers and beacon receivers using 4 separate antennas are presented. Clear cases of ice-depolarisation and variations in scaling of attenuation have been found in the unusual climate of the winter 1989/90.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116135560","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
Noise Analysis of Nonlinear Microwave Circuits 非线性微波电路的噪声分析
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336183
S. Heinen, R. Stahlmann, N. Haensel, S. Kosslowski, J. Kunisch, N. Koster, I. Wolff
{"title":"Noise Analysis of Nonlinear Microwave Circuits","authors":"S. Heinen, R. Stahlmann, N. Haensel, S. Kosslowski, J. Kunisch, N. Koster, I. Wolff","doi":"10.1109/EUMA.1990.336183","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336183","url":null,"abstract":"This paper introduces a new noise analysis algorithm, which is perfectly suited for linear and nonlinear applications. The adjoint system method is extended to compute the noise correlation matrix of multiport networks with arbitrary topology. The algorithm is easy to implement in general purpose CAD tools because only a nodal formulation of the system equations is needed.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125004526","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
Numerical Evidence for Hysteresis in Nonlinear Slab-Guided TE and TM Waves 非线性板导TE波和TM波迟滞的数值证据
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336089
A. C. Zabeu, J. Souza
{"title":"Numerical Evidence for Hysteresis in Nonlinear Slab-Guided TE and TM Waves","authors":"A. C. Zabeu, J. Souza","doi":"10.1109/EUMA.1990.336089","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336089","url":null,"abstract":"By means of finite difference methods, together with variational techniques, solutions are obtained for both TE and TM waves guided by dielectric slabs surrounded by arbitrarily nonlinear material, illustrating the onset of bistability and hysteresis. The method relies on an iterative scheme to arrive at self-consistent and stable solutions. The dependence of the signal intensity threshold for the occurrence of hysteresis with respect to the slab thickness is investigated.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122675907","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 by the Infinite Microstrip-Patch Array 无限微带贴片阵列的散射
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336277
A. Ilyinsky, V. Ivakhnenko
{"title":"Scattering by the Infinite Microstrip-Patch Array","authors":"A. Ilyinsky, V. Ivakhnenko","doi":"10.1109/EUMA.1990.336277","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336277","url":null,"abstract":"The paper deals with the problem of electromagnetic scattering by the infinite rectangular microstrip-patch array. The boundary problem for Maxwell's equations in stratified media is reduced to the electric field integral equation for the unknown surface current distribution on the patch in a unit cell of the grid. We inverse the vector differential operator in this equation and obtain a new system of integral equations of first kind for the unknown surface current on the patch. This system with weakly singular kernels is solved numerically, the collocation method with subsectional basis functions is used.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131487012","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
Dielectric Resonator Method for Nondestructive Measurement of Complex Permittivity of Microwave Dielectric Substrates 微波介质基片复介电常数无损测量的介质谐振器方法
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336092
T. Nishikawa, K. Wakino, Hiroaki Tanaka, Y. Ishikawa
{"title":"Dielectric Resonator Method for Nondestructive Measurement of Complex Permittivity of Microwave Dielectric Substrates","authors":"T. Nishikawa, K. Wakino, Hiroaki Tanaka, Y. Ishikawa","doi":"10.1109/EUMA.1990.336092","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336092","url":null,"abstract":"A new technique for the measurement of the complex permittivity of dielectric substrates was developed. This method is a non-contact measurement using two dielectric resonators which support the TE016 mode. The complex permittivity is analyzed using finite element method. The nondestructive measurement of located small area in a dielectric substrate can be achieved. This paper describes some examples of measurement.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126977701","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
Performance Limits of Automatic Gain Control in AM Microwave Systems 调幅微波系统中自动增益控制的性能限制
1990 20th European Microwave Conference Pub Date : 1990-10-01 DOI: 10.1109/EUMA.1990.336300
T. Faragó
{"title":"Performance Limits of Automatic Gain Control in AM Microwave Systems","authors":"T. Faragó","doi":"10.1109/EUMA.1990.336300","DOIUrl":"https://doi.org/10.1109/EUMA.1990.336300","url":null,"abstract":"The behaviour of an automatic gain control system is analysed in the presence of deterministic input signals. The response of the system to a single modulated signal is calculated by solving a linear first-order differential equation with periodically varying coefficient. The steady-state response is obtained in terms of the harmonics, and computer simulation is used to evaluate the dynamic performance.","PeriodicalId":248044,"journal":{"name":"1990 20th European Microwave Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121883065","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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