{"title":"Microwave Research and Industry in Eastern Central Europe","authors":"A. Jeleński","doi":"10.1109/EUMA.1992.335723","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335723","url":null,"abstract":"The organisation of research and industry in the planified economy environment, giving the historical background to the actual situation is briefly outlined in first part of this paper. In the second part more important results of microwave research and products of microwave industry in Czechoslovakia Hungary, and Poland are described. Finally problems arising during the process of economy transformation, market perspectives and trends in microwave research and development are discussed.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114553870","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}
{"title":"Electromagnetics in Novel Isotropic Media","authors":"I. Lindell","doi":"10.1109/EUMA.1992.335724","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335724","url":null,"abstract":"Basic relations of electromagnetic fields in bi-isotropic media are briefly discussed. Such media are more general than the ordinary isotropic dielectric and magnetic media because they can couple electric and magnetic polarizations. Bi-isotropic media have interesting possible applications and the main problem today lies in the fabrication, which has not yet reached an industrial level. However, before starting making such media, their usefulness must be shown theoretically.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116257892","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}
{"title":"Overview of Japanese Propagation Studies for Future Satellite Communications","authors":"M. Yamada, Y. Karasawa","doi":"10.1109/EUMA.1992.335796","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335796","url":null,"abstract":"Recent activities of propagation studies for satellite communications in Japan are summarized. The results of such studies for mobile-satellite systems and fixed-satellite systems, and countermeasures for propagation impairments are described. Finally, some plans of propagation experiments using satellites to be launched in near future are introduced.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114438462","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}
{"title":"Black-Box Modelling of Nonlinear Devices for Frequency-Domain Analysis","authors":"T. Narhi","doi":"10.1109/EUMA.1992.335853","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335853","url":null,"abstract":"A large-signal black-box model for nonlinear microwave devices is presented. The model is directly constructed from measured small-signal s-parameters and DC characteristic curves of the device without complicated parameter extraction procedures. Separate determination of device parasitics is not necessary. The model is self-consistent, very general and device-and technology-independent. Black-box model of a MESFET and its implementation in a frequency-domain analysis program is described, and measured and calculated results are compared.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125956653","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}
{"title":"Deep Space Receiver for Cassini-Huygens Radio Link","authors":"G. Boscagli, M. Comparini","doi":"10.1109/EUMA.1992.335727","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335727","url":null,"abstract":"The CASSLNI-HUYGENS mission is a deep space mission for the exploration and the study of the atmosphere of Titan. The combined Orbiter-Probe spacecraft will reach the Saturn system about 8.5 years after the launch. At that time the Probe will be separated and its mission will start transmitting scientific and housekeeping data during the descent phase to the surface of Titan via S-band radio relay link. The Probe Data Relay Link is composed by the Probe Transmitter Terminal (PTT), on Huygens spacecraft, and the Orbiter Receiving Terminal (ORT), on Cassini spacecraft. The PTT includes two chains which tranrsmit the phase modulated carriers at two different frequencies with opposite circular polarizations. On the orbiter the two signals are discriminated and separately amplified by the LNAs. The receivers acquire and synchronize the carter and subcarrier and provide the data demodulation and decoding. Major requirements of the deep space receivers are fast signal acquisition and demodulation capability at very low C/No. The paper describes the Orbiter Receiver architecture underlying the advantages of a fully digital approach.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125224528","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}
{"title":"Experimental Comparison beiween Angular and Space Diversites on a 60 Km Hop in 4 GHz Band","authors":"U. Casiraghi, D. Mandich, S. Candeo","doi":"10.1109/EUMA.1992.335702","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335702","url":null,"abstract":"This article summaris the most sipificant results applicable to the angular (AD) and space (SD) diversities cxpriment, started at the beginning of May 1991 and stili in progrss - on a 60 Km line-of-sight mia digital radio link in the north of Italy. The primary objective of this test is to evaluate the performances of thcsc fading countermeasurements in order to give the opportunity to compare them each other. Specal attention has been dedicated to the role of elevation position of the dual beam antenna and the angular separation of the two beam. The achieved results have shown that AD could be a suitable solution to counterbalance multipath fading activity also if it sounds to be less effective than SD, at least in the adopted dual beam antenna set ups.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124150299","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}
{"title":"K-and C-Band Low Phase Noise MMIC VCOs Using a Linear Varactor","authors":"M. Muraguchi, H. Kamitsuna","doi":"10.1109/EUMA.1992.335791","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335791","url":null,"abstract":"A new circuit configuration is proposed for low phase noise VCOs. A linear varactor consisting of an FET varistor and an MIM capacitor eliminates 1/f noise up-conversion of the frequency tuning element. The measured results of the fabricated 20 GHz-and 6 GHz-band MMIC VCOs indicate more than 10 dB phase noise improvement compared with conventional varactor diode-based MMIC VCOs.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"456 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124326916","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}
{"title":"A New Type of Compact Antenna Test Range","authors":"Jussi Tuovinen, Antti Vasara, A. Raiisainen","doi":"10.1109/EUMA.1992.335716","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335716","url":null,"abstract":"The application of conventional reflector type compact antenna test ranges (CATR), becomes increasingly difficult above 100 GHz. The main problems are the tight surface accuracy requirements for the reflector, and therefore the high manufacturing costs. These problems can be overcome by the use of a new hologram type of compact range, in which a planar hologram structure is used as a collimating element. This new idea is described, and its performance is studied with theoretical analyses and measurements at 110 GHz.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123508868","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}
{"title":"Rotman Lens in Microstrip Technology","authors":"B. Carlegrim, L. Pettersson","doi":"10.1109/EUMA.1992.335816","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335816","url":null,"abstract":"A microwave lens of Rotman type, to be used in a broadband multibeam antenna, has been designed in microstrip technology. The method of analysis used, based on a ray approach, is briefly described and compared for a circular geometry with a, in some respect, rigorous method. The design of a Rotman lens with 15 beam ports and 15 antenna element ports is described as are the measured and calculated transmission through the lens and the arrayfactor as calculated from the measured transmission coefficients.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121508158","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}
{"title":"A Method for Measuring Properties of Grainy Materials using Depolarized Rayleigh-Scattering","authors":"A. Toropainen","doi":"10.1109/EUMA.1992.335842","DOIUrl":"https://doi.org/10.1109/EUMA.1992.335842","url":null,"abstract":"A new method for measuring properties of grainy materials using depolarized Rayleigh-scattering is introduced. Laboratory tests at 35 GHz with white rice and polyethene grains using a vector network analyzer and two corrugated horn antennas are presented and results are compared with theoretical results based on the first order multiple scattering theory. A low-cost measurement set-up for industrial measurements is also suggested.","PeriodicalId":317106,"journal":{"name":"1992 22nd European Microwave Conference","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121930596","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}
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