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1976 6th European Microwave Conference最新文献

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Film Mode Attenuation Due to Random Surface Irregularities 随机表面不规则性引起的膜模式衰减
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332328
J. Hinken
{"title":"Film Mode Attenuation Due to Random Surface Irregularities","authors":"J. Hinken","doi":"10.1109/EUMA.1976.332328","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332328","url":null,"abstract":"A method for the approximate calculation of the attenuation constant of dielectric film modes due to small two dimensional random boundary deviations from eveness is presented. The irregularities are replaced by effective sources, the radiated power of which accounts for the loss, suffered by an incident mode. Results for the H0-and E0-mode are plotted versus their film asymmetry parameters. When the deviations are assumed to be grooves transvers to the propagation direction, the problem becomes two dimensional and the results show good agreement with an earlier more accurate treatment.","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":"133485398","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
Element Patterns for Linear Phased Arrays with Descattering Net Works 具有散射网络的线性相控阵的单元图
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332298
J. Andersen, A. Zaghloul
{"title":"Element Patterns for Linear Phased Arrays with Descattering Net Works","authors":"J. Andersen, A. Zaghloul","doi":"10.1109/EUMA.1976.332298","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332298","url":null,"abstract":"The limitations on the element pattern for linear arrays are studied and it is shown that the ideal element pattern is the omnidirectional pattern, leading to a very wide angular scan. Lossless interconnecting networks are used to improve the element pattern and the behaviour as the network size increases is investigated. Asymptotic expressions are given for very large arrays where the network effect is also shown.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"373 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132702522","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
Resonated Combline Bandpass Filter 谐振组合带通滤波器
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332245
G. Hoffman
{"title":"Resonated Combline Bandpass Filter","authors":"G. Hoffman","doi":"10.1109/EUMA.1976.332245","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332245","url":null,"abstract":"By loading the interior conductors of a classical combline filter with a series resonating impedance, very steep upper band skirt response may be generated. The procedure is particularly interesting for extending etched circuit combline filter technology to the lower microwave frequencies, with significant increases on filter performance and space requirements.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"131 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":"114663419","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
Accurate Scattering Parameter Measurements on Non-Connectable Microwave Networks 非连通微波网络散射参数的精确测量
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332275
R. Speciale, R. Grabowski, N. Franzen
{"title":"Accurate Scattering Parameter Measurements on Non-Connectable Microwave Networks","authors":"R. Speciale, R. Grabowski, N. Franzen","doi":"10.1109/EUMA.1976.332275","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332275","url":null,"abstract":"The development of an explicit and exact algorithm, computing the equivalent error representation for a network analyzer system, makes accurate measurements possible upon non-connectable microwave networks, embedded in complex transmission line environments. Typical examples are measurements at non-standard impedance levels and upon non-TEM waveguide modes.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"100 6 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":"116014552","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: 13
4 GHz Low Noise Parametric Amplifier 4 GHz低噪声参量放大器
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332334
L. F. Franti
{"title":"4 GHz Low Noise Parametric Amplifier","authors":"L. F. Franti","doi":"10.1109/EUMA.1976.332334","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332334","url":null,"abstract":"A rugged and reliable 4 GHz uncooled parametric amplifier is presented. The solution is particularly suited to domestic systems and for installations where cost of maintenance is a problem. It complies with the specifications for ground stations operating with Intelsat Satellites. Some features are: 1) a low pump frequency of 44 GHz from a reliable Gunn Oscillator operating at 11 GHz followed by a X4 multiplier. 2) a unique gain stability, particularly long term, assured by a very effective loop. 3) a compact and reliable 4 GHz W/G circulator with very low noise contribution and with intrinsic rejection of spurious signals generated by the transmitter. Design criteria and the principal parts of the project, as well as the results obtained will be described in the paper.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"72 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":"125756263","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 Effect of Rain on Echoes in the Vicinity of mm-Pulse Radars 降雨对毫米脉冲雷达附近回波的影响
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332306
W. Wiesbeck
{"title":"The Effect of Rain on Echoes in the Vicinity of mm-Pulse Radars","authors":"W. Wiesbeck","doi":"10.1109/EUMA.1976.332306","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332306","url":null,"abstract":"In recent years the development of mm-wave pulse radars was pushed forward very rapidly. It can be shown that precipitation echoes, the main interference source, cannot be computed from the well-known formula for weather radars in which a conical energy distribution is assumed. It is necessary to approximate the real nearfield energie distribution. In this letter this is done by a hyperbolic transition from the effective antenna area to the farfield cone. The new definition for a nearfield gain is used to derive the equation for rain echoes from 1m to 10,000 m. It is shown that in contrast to the behaviour in the farfield the echoes are proportional to the inverse of the gain. This is because antennas with high farfield-gain have a low nearfield-gain.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"12 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":"130588129","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
Surface Roughness Measurements by using Low-Resolution FM-CW Radar Altimeters 用低分辨率FM-CW雷达高度计测量表面粗糙度
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332304
S. Axelsson
{"title":"Surface Roughness Measurements by using Low-Resolution FM-CW Radar Altimeters","authors":"S. Axelsson","doi":"10.1109/EUMA.1976.332304","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332304","url":null,"abstract":"When a radar altimeter is used over a rough ground surface, a noise component is added to the output signal. The mean deviation of the noise mainly depends on the range spread of the reflectors located within the antenna beam. The close relationship between noise and range spread can be used to estimate the height of surface roughnesses by low-resolution radar altimetry. Experimental results compare favorably with theoretical predictions.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"12 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":"126672265","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 New Tracking Modes Coupler using a Corrugated Feed for Satellite Communication Earth-Station Antenna 一种用于卫星通信地面站天线的波纹馈电跟踪模式耦合器
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332266
S. Drabowitch
{"title":"A New Tracking Modes Coupler using a Corrugated Feed for Satellite Communication Earth-Station Antenna","authors":"S. Drabowitch","doi":"10.1109/EUMA.1976.332266","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332266","url":null,"abstract":"A corrugated tracking modes coupler operating with any linear or circular polarization is described. This device propagates without disturbance the received and transmitted HE11 communication modes, and selects as tracking modes, the TM01 and HE21 modes by use of their specific phase velocities which are equalized by the proper design of the corrugated guide geometry. The tracking modes are coupled by four arrays of transversal slots in four \"collecting guides\" having the same phase velocity. Experimental performances in the 10.95 - 14,5 GHz band are given. They show a very low parasitic coupling of the HE11 mode, no distortion of its primary radiation patterns and a good tracking sensitivity.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"29 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":"116598818","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
Some Novel Characterisation Techniques Used in the Design of X-Band GaAs FET Amplifiers 用于x波段GaAs场效应管放大器设计的一些新型表征技术
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332238
R. Soares, S. Cripps
{"title":"Some Novel Characterisation Techniques Used in the Design of X-Band GaAs FET Amplifiers","authors":"R. Soares, S. Cripps","doi":"10.1109/EUMA.1976.332238","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332238","url":null,"abstract":"Some improved techniques are described for characterising FETs at X-band frequencies. Device s-parameters are measured on an Automatic Network Analyser using co-axial calibration standards, and much better agreement has been obtained between theoretical and experimental amplifier responses. The measurement of minimum device noise figure, and more especially the accurate determination of optimum source impedance as a function of frequency, present some awkward problems at these frequencies. Some techniques will be presented which overcome many of these problems. The application of these techniques to practical amplifier fabrication will be illustrated by reference to several units, including a temperature compensated 9-10 GHz amplifier with 4.5 dB maximum noise figure, and a wide-band balanced amplifier.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"6 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":"134231618","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
Large Signal Effects in the Avalanche Region of High-Efficiency Impatt Diodes 高效冲击二极管雪崩区的大信号效应
1976 6th European Microwave Conference Pub Date : 1976-10-01 DOI: 10.1109/EUMA.1976.332296
P. Blakey
{"title":"Large Signal Effects in the Avalanche Region of High-Efficiency Impatt Diodes","authors":"P. Blakey","doi":"10.1109/EUMA.1976.332296","DOIUrl":"https://doi.org/10.1109/EUMA.1976.332296","url":null,"abstract":"The avalanche regions of 'lo-hi-lo' and 'hi-la' IMPATTs are significantly different even though their drift regions may be similar. It is likely that this will cause differences in the large signal behaviour of the two structures. This possibility is investigated using computer simulation.","PeriodicalId":377507,"journal":{"name":"1976 6th European Microwave Conference","volume":"18 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":"133381028","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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