发布求助
文献互助 智能选刊 最新文献

1977 7th European Microwave Conference最新文献

筛选
英文 中文
Dielectric Loss Measurements Below 15 Kelvin by using Superconducting Microwave Resonators 用超导微波谐振器测量15开尔文以下的介电损耗
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332483
W. Meyer
{"title":"Dielectric Loss Measurements Below 15 Kelvin by using Superconducting Microwave Resonators","authors":"W. Meyer","doi":"10.1109/EUMA.1977.332483","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332483","url":null,"abstract":"The paper deals with the theoretical and practical investigation of superconducting Nb3 Sn-helical-resonators with quality factors greater than 108 which allow the determination of dielectric loss tangents in the range of 0.1 to 10GHz and below 15KHz with an absolute accuracy of 10-7. The cryogenic loss of various polymers is found to be considerably smaller than the room temperature data, its pronounced temperature and frequency dependence is qualitatively explained by tunneling relaxation as well as the low frequency tail of the infrared absorption, both mechanisms being enhanced by dipolarity and irregularity of the molecular structure.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114534170","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 Propagation in a Waveguide Containing Composite Structure of Semiconductor and Ferrite 微波在含半导体和铁氧体复合结构波导中的传播
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332418
P. Gupta, S. Tolpadi
{"title":"Microwave Propagation in a Waveguide Containing Composite Structure of Semiconductor and Ferrite","authors":"P. Gupta, S. Tolpadi","doi":"10.1109/EUMA.1977.332418","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332418","url":null,"abstract":"In this communication propagation characteristics of a waveguide filled with a composite system of semiconductor and ferrite slab have been investigated. The dispersion relation for the propagation of electromagnetic waves along the interface between a low-loss ferrimagnetic material and a high mobility current carrying semiconductor is obtained. It is shown that the drift carrier stream in the semiconductor including diffusion and collision effects play an important role in the behaviour of space charge waves. There is an interaction between a wave in semiconductor having drift and diffusion effects and a wave in ferrite which gives rise to a growing wave with drifting carrier present in the semiconductor. It is suggested that solid state travelling wave anplifier can be adjacent to ferrite slab.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123860559","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
Design, Measurement and Application of Lumped Elements up to J-Band j波段集总元件的设计、测量与应用
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332468
R. Pengelly, D. Rickard
{"title":"Design, Measurement and Application of Lumped Elements up to J-Band","authors":"R. Pengelly, D. Rickard","doi":"10.1109/EUMA.1977.332468","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332468","url":null,"abstract":"Lumped-element design, fabrication and characterization has been extended for MIC requirements up to l8GHz. Spiral or loop inductors and overlay or interdigital capacitors have been measured at appropriate frequencies leading to satisfactory equivalent circuits. Variations in parasitic reactances and Q-factor with frequency, substrate dielectric constant and component geometry are presented. Particular applications include filter networks and FET amplifier matching circuits, the latter enabling octave coverage amplifier modules over X and J-band frequencies to be realised.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125379773","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: 22
The Theory for the Dielectric Slab Waveguide with Complex Refractive Index Applied to GaAs Lasers 复折射率介质平板波导应用于砷化镓激光器的理论
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332400
J. Buus
{"title":"The Theory for the Dielectric Slab Waveguide with Complex Refractive Index Applied to GaAs Lasers","authors":"J. Buus","doi":"10.1109/EUMA.1977.332400","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332400","url":null,"abstract":"In this paper we investigate the homogeneous dielectric slab waveguide in the case of complex dielectric constants. A method for calculating the field distribution in a dielectric waveguide with an arbitrary symmetrical variation in the refractive index is developed, and some of the results are presented. The results are applied to the GaAs laser. It is fonud that the guiding mechanism is a combination of gain guiding and index antiguiding. Based on the calculations an explanation of the kinks on the light current characteristics is suggested.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114143971","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
A Multifeed Offset Reflector Antenna for the INTELSAT V Communications Satellite INTELSAT V通信卫星的多馈源偏置反射器天线
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332449
C. Han
{"title":"A Multifeed Offset Reflector Antenna for the INTELSAT V Communications Satellite","authors":"C. Han","doi":"10.1109/EUMA.1977.332449","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332449","url":null,"abstract":"An array-fed offset reflector antenna is used to provide shaped hemispheric and zonal coverage for the INTELSAT V communications satellite. The objectives of frequency reuse via both sidelobe isolation and cross-polarization isolation and efficient beam shaping are accomplished by optimizing feeding coefficients and minimizing the circular cross-polarization of the square waveguide feed-array cluster. Corroborating measurements on the performance parameters, such as minimum coverage gain, maximum coverage gain variation, and side lobe and cross-polarization isolation, are presented.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117225150","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: 10
The Development of Circular Waveguide TEOON Mode Filters 圆波导TEOON模式滤波器的研制
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332403
I. Powell, B. Watson, J. Weale, R. Waldron
{"title":"The Development of Circular Waveguide TEOON Mode Filters","authors":"I. Powell, B. Watson, J. Weale, R. Waldron","doi":"10.1109/EUMA.1977.332403","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332403","url":null,"abstract":"Unwanted circularly symmetric modes of the TE<sup>O</sup><sub>ON</sub> family are generated at discontinuities in a circular waveguide and can cause serious impairment within the guided millimetre-wave transmission system. This paper describes the development of a TE<sup>O</sup><sub>ON</sub> mode filter which operates using the phase difference between two or more sectorial waveguides, and provides cancellation to the undesired TE<sup>O</sup><sub>02</sub> and TE<sup>O</sup><sub>03</sub> modes whilst passing the wanted TE<sup>O</sup><sub>01</sub> mode. To establish the principle, an experimental model of a two-section filter has been constructed and its TE<sup>O</sup><sub>01</sub> and TE<sup>O</sup><sub>02</sub> mode transmission performance has been measured. TE<sup>O</sup><sub>01</sub> and TE<sup>O</sup><sub>02</sub> mode transmission losses of ⩽0.3 dB and ⩾10 dB for a 12 GHz frequency band centred at 36 GHz respectively have been measured. Ultimately, a broadband, 30 to 110 GHz, four-section filter is proposed which exhibits a theoretical TE<sup>O</sup><sub>02</sub> mode transmission loss of greater than 20 dB.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116670864","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
Modeling and Approximation for Statistical Evaluation and Optimization of Microwavedesigns 微波设计统计评估与优化的建模与近似
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332420
J. Bandler, H. L. Abdel-Malek
{"title":"Modeling and Approximation for Statistical Evaluation and Optimization of Microwavedesigns","authors":"J. Bandler, H. L. Abdel-Malek","doi":"10.1109/EUMA.1977.332420","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332420","url":null,"abstract":"This paper shows how, by suitably updated approximations, one may surmount the obstacle of expensive experimental tuning or repeated computer simulations of trial designs when optimal designs or statistical analyses are required. The authors address themselves to the efficient use of available software by designers wishing to exploit the current state of the art in techniques of statistical design, tolerance assignment and optimal tuning. The ideas and results are new to microwave design.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126641398","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
Characterisation of a non-1inear Satellite Transistor Amplifier in a Single-Channel-Per-Carrier Link 单载波链路中非线性卫星晶体管放大器的特性
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332487
W. Kriedte, A. Woode
{"title":"Characterisation of a non-1inear Satellite Transistor Amplifier in a Single-Channel-Per-Carrier Link","authors":"W. Kriedte, A. Woode","doi":"10.1109/EUMA.1977.332487","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332487","url":null,"abstract":"The paper describes the test-set and the test methods to assess the performance of a satellite power amplifier designed for multicarrier operation. The following specific characteristics are measured: -1. Single carrier characteristic -2. Carrier to Intermodulation Power Ratio for Multicarrier Operation -3. Current Ripple or Power Supply Line -4. S/N or BER in a Link Simulation","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128931049","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
11 GHz Parametric Amplifier for Communications via Satellite 用于卫星通信的11ghz参数放大器
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332455
C. Bassi, T. D'Arcangelo
{"title":"11 GHz Parametric Amplifier for Communications via Satellite","authors":"C. Bassi, T. D'Arcangelo","doi":"10.1109/EUMA.1977.332455","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332455","url":null,"abstract":"The 11 GHz band is getting popularity for communications via satellite. A new uncooled parametric amplifier has therefore been designed in this frequency range to cover the operational needs of commercial traffic (Intelsat V satellites) as well as those of specific communication experiments in the 11/ 14 GHz bands related to OTS (Orbital Test Satellite, ESA) ECS (European Communication Satellite, ESA) and SIRIO (Italian Satellite for Propagation and Communication tests). The paper is a comprehensive description of the 11 GHz parametric amplifier developed by GTE-Telecomunicazioni, from the view point of its characteristics and of the design philosophy.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122934276","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
The Onsala 20 M Millimeter Wave Radio Telescope 安萨拉20米毫米波射电望远镜
1977 7th European Microwave Conference Pub Date : 1977-10-01 DOI: 10.1109/EUMA.1977.332461
O. Rydbeck, B. Ronnang, B. Hansson, J. Ellder, Å. Hjalmarson, E. Kollberg, R. D'Amato
{"title":"The Onsala 20 M Millimeter Wave Radio Telescope","authors":"O. Rydbeck, B. Ronnang, B. Hansson, J. Ellder, Å. Hjalmarson, E. Kollberg, R. D'Amato","doi":"10.1109/EUMA.1977.332461","DOIUrl":"https://doi.org/10.1109/EUMA.1977.332461","url":null,"abstract":"A 20 millimeter wave telescope, enclosed in a 30 m metal space frame radome, has recently been completed and put into operation by Research Laboratory of Electronics. A number of novel features are incorporated in this new, Cassegrainian - type instrument. The main reflector is semi-homologous, which permits operations up to 120 GHz, and probably higher. In order to obtain a maximum aperture efficiency for each elevation the subreflector is (automatically) moveable with five degrees of freedom. The telescope is designed for multifrequency operation in the frequency range 8-120 GHz. Lens shortened feed horns are used in the lowest part of this range. TW-maser amplifiers are used up to about 45 GHz. Above 65, and up to about 120 GHz, resistive mixers (later to be cooled) are presently used. This new telescope, the largest one of its kind, its radiometer systems, and the most important results obtained with the same will be presented and discussed.","PeriodicalId":369354,"journal":{"name":"1977 7th European Microwave Conference","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126003945","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信