Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017827
A. Synyavskyy, N. Synyavska
The results of investigation of stochastic features of an echo signal received by a high-resolution coherent radar are shown in the paper. The analytical relation between discrete model parameters of scattering and distribution laws of received signal magnitude was established in this analysis. It was shown that the probability density function of signal magnitude depends on the scattering technique, in the general case essentially differs from the Rice-Rayleigh distribution. and cannot be written in explicit form. The proposed approach allows us to obtain analytically distribution functions which describe the stochastic features of scattered signal magnitude with good accuracy.
{"title":"Analytical form of distribution functions of received signals for high resolution coherent radar","authors":"A. Synyavskyy, N. Synyavska","doi":"10.1109/MIKON.2002.1017827","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017827","url":null,"abstract":"The results of investigation of stochastic features of an echo signal received by a high-resolution coherent radar are shown in the paper. The analytical relation between discrete model parameters of scattering and distribution laws of received signal magnitude was established in this analysis. It was shown that the probability density function of signal magnitude depends on the scattering technique, in the general case essentially differs from the Rice-Rayleigh distribution. and cannot be written in explicit form. The proposed approach allows us to obtain analytically distribution functions which describe the stochastic features of scattered signal magnitude with good accuracy.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121256152","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}
Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017959
M. Mazur
A method of designing biconical antennas with unequal cone angles with optimised radiating patterns in elevation is investigated. The design formulas are obtained from the simplified results of full wave analysis presented in the literature. The theoretical results are verified with measurements of the fabricated model giving a good agreement.
{"title":"The approach to exact and fast design of biconical antenna with unequal cone angles","authors":"M. Mazur","doi":"10.1109/MIKON.2002.1017959","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017959","url":null,"abstract":"A method of designing biconical antennas with unequal cone angles with optimised radiating patterns in elevation is investigated. The design formulas are obtained from the simplified results of full wave analysis presented in the literature. The theoretical results are verified with measurements of the fabricated model giving a good agreement.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124706696","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}
Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017920
P. Dyderski
The article presents design method of stepped transmission-line microwave filters and transformers with improved parameters. In many situations microwave filters and transformers designed by conventional methods (without discontinuity influence on frequency characteristics taken into account) have not acceptable characteristics. Discrepancy between ideal and measured characteristics increases with frequency because of to large Z/sub max//Z/sub min/ ratio (e.g. d/sub max//d/sub min/ for coaxial line) and large dimensions in comparison to /spl lambda/. Significant improvement of discussed networks parameters can be accomplished by using optimisation procedures and taking adequate discontinuity model into account. As a result we obtain filters and transformers with very well convergent theoretical and measured characteristics.
{"title":"Stepped transmission-line microwave filters and transformers with improved parameters","authors":"P. Dyderski","doi":"10.1109/MIKON.2002.1017920","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017920","url":null,"abstract":"The article presents design method of stepped transmission-line microwave filters and transformers with improved parameters. In many situations microwave filters and transformers designed by conventional methods (without discontinuity influence on frequency characteristics taken into account) have not acceptable characteristics. Discrepancy between ideal and measured characteristics increases with frequency because of to large Z/sub max//Z/sub min/ ratio (e.g. d/sub max//d/sub min/ for coaxial line) and large dimensions in comparison to /spl lambda/. Significant improvement of discussed networks parameters can be accomplished by using optimisation procedures and taking adequate discontinuity model into account. As a result we obtain filters and transformers with very well convergent theoretical and measured characteristics.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124859305","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}
Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017964
A. Kirilenko, D. Kulik, Y. Parkhomenko, L. Rud, V. Tkachenko
The main goal of the paper is to present a new generalized mode-matching (GMM) approach to both mode bases and S-matrices calculation of complicated waveguide circuits. Development of the GMM procedures makes it possible to realize totally automatic algorithms for a wide set of configurations avoiding a specialized analytical treatment of each new boundary-value problem. Moreover, the background for linking up the interface tools of a circuit geometry specification and editing is provided by the GMM approach together with the special algorithms for recognizing the object configurations and for data preparation. The class of objects that can be calculated by the suggested approach includes any WG circuits with metal boundaries specified in the Cartesian coordinate system or with the smooth boundaries that may be replaced by a staircase surface. The corresponding electromagnetic solvers are closer to the software based on the mesh methods in generality, in the same time saving the high accuracy and computation speed typical for highly specialized mode-matching procedures.
{"title":"Automatic electromagnetic solvers based on mode-matching, transverse resonance, and S-matrix techniques","authors":"A. Kirilenko, D. Kulik, Y. Parkhomenko, L. Rud, V. Tkachenko","doi":"10.1109/MIKON.2002.1017964","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017964","url":null,"abstract":"The main goal of the paper is to present a new generalized mode-matching (GMM) approach to both mode bases and S-matrices calculation of complicated waveguide circuits. Development of the GMM procedures makes it possible to realize totally automatic algorithms for a wide set of configurations avoiding a specialized analytical treatment of each new boundary-value problem. Moreover, the background for linking up the interface tools of a circuit geometry specification and editing is provided by the GMM approach together with the special algorithms for recognizing the object configurations and for data preparation. The class of objects that can be calculated by the suggested approach includes any WG circuits with metal boundaries specified in the Cartesian coordinate system or with the smooth boundaries that may be replaced by a staircase surface. The corresponding electromagnetic solvers are closer to the software based on the mesh methods in generality, in the same time saving the high accuracy and computation speed typical for highly specialized mode-matching procedures.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125906631","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}
Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017844
D. Usanov, A. Skripal, A. Abramov
The influence of optical radiation on the performance of a synchronized microwave Gunn-diode oscillator in the coherent signals subtraction mode has been described theoretically and investigated experimentally. The high sensitivity of the oscillator characteristics to the change of the optical intensity affecting the semiconductor diode structure has been shown. It is suggested to use this mode for the creation of optoelectronic microwave systems with the controlled amplitude and phase of the output signal and for the high-accuracy indication of optical radiation.
{"title":"Optical control of semiconductor synchronized microwave oscillators in the power suppression mode","authors":"D. Usanov, A. Skripal, A. Abramov","doi":"10.1109/MIKON.2002.1017844","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017844","url":null,"abstract":"The influence of optical radiation on the performance of a synchronized microwave Gunn-diode oscillator in the coherent signals subtraction mode has been described theoretically and investigated experimentally. The high sensitivity of the oscillator characteristics to the change of the optical intensity affecting the semiconductor diode structure has been shown. It is suggested to use this mode for the creation of optoelectronic microwave systems with the controlled amplitude and phase of the output signal and for the high-accuracy indication of optical radiation.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123229339","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}
Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017798
L. Ligthart, S. Groh, W. Klembowski
One of the instruments (opportunities) to enhance the collaboration between East and West European Institutes is the Science for Peace Sub-Programme, part of the NATO Science Programme. Since its foundation in 1958 the NATO Science Programme has developed support mechanisms like advanced study institutes, collaborative research grants and science fellowships in order to support training of young scientists and engineers, mechanisms that are still in use. Since the early 1990s the NATO Science Programme has been extended to support also scientists from NATO Partner countries. In 1999 the Science Programme was transformed so that support is now devoted to collaboration between scientists of Partner countries and NATO countries. NATO activities in research and technology are stimulated via the Research and Technology Organisation, RTO. In this paper attention is paid to the Science for Peace Sub-Programmes and to other science sub-programmes. We overview the NATO and Partner countries, elucidate some examples of projects under NATO funding, and describe RTO areas.
{"title":"NATO programmes in science and technology for Eastern and Central Europe","authors":"L. Ligthart, S. Groh, W. Klembowski","doi":"10.1109/MIKON.2002.1017798","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017798","url":null,"abstract":"One of the instruments (opportunities) to enhance the collaboration between East and West European Institutes is the Science for Peace Sub-Programme, part of the NATO Science Programme. Since its foundation in 1958 the NATO Science Programme has developed support mechanisms like advanced study institutes, collaborative research grants and science fellowships in order to support training of young scientists and engineers, mechanisms that are still in use. Since the early 1990s the NATO Science Programme has been extended to support also scientists from NATO Partner countries. In 1999 the Science Programme was transformed so that support is now devoted to collaboration between scientists of Partner countries and NATO countries. NATO activities in research and technology are stimulated via the Research and Technology Organisation, RTO. In this paper attention is paid to the Science for Peace Sub-Programmes and to other science sub-programmes. We overview the NATO and Partner countries, elucidate some examples of projects under NATO funding, and describe RTO areas.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125250432","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}
Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017842
J. Mazur, M. Mazur, J. Michalski, E. Sedek
New gyrators based on a ferrite coupled line section (FCL) are developed and investigated. The scattering parameters are calculated for microstrip and slot-line configurations providing the practical information for design of these components. As an example, an isolator using the microstrip gyrator is designed and its scattering characteristics are calculated and discussed.
{"title":"Development of ferrite coupled lines gyrator","authors":"J. Mazur, M. Mazur, J. Michalski, E. Sedek","doi":"10.1109/MIKON.2002.1017842","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017842","url":null,"abstract":"New gyrators based on a ferrite coupled line section (FCL) are developed and investigated. The scattering parameters are calculated for microstrip and slot-line configurations providing the practical information for design of these components. As an example, an isolator using the microstrip gyrator is designed and its scattering characteristics are calculated and discussed.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126655618","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}
Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017983
R. Kubacki, M. Krukowski, J. Kieliszek, J. Sobiech
A new program of evaluation of the electromagnetic field strength distribution has been presented. This program has been mainly designed for calculating the area of safety zones around microwave antennas. New expressions of the E and H fields by modifying vector potentials have been derived. The received formulas allow the calculation of the EM field distribution in the near-field. The calculation program can be used for a wide class of microwave antennas, like GSM or radar antennas. The real topography of the ground is included for calculation of the incident, reflected and resultant rays.
{"title":"New computational model of electromagnetic field distribution for predicting of the safety zones in the near-field of microwave antennas","authors":"R. Kubacki, M. Krukowski, J. Kieliszek, J. Sobiech","doi":"10.1109/MIKON.2002.1017983","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017983","url":null,"abstract":"A new program of evaluation of the electromagnetic field strength distribution has been presented. This program has been mainly designed for calculating the area of safety zones around microwave antennas. New expressions of the E and H fields by modifying vector potentials have been derived. The received formulas allow the calculation of the EM field distribution in the near-field. The calculation program can be used for a wide class of microwave antennas, like GSM or radar antennas. The real topography of the ground is included for calculation of the incident, reflected and resultant rays.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116131826","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}
Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017815
V. Lyubchenko, N. Zaitsev, V.N. Volkov
A 60 GHz radio bridge as part of a local area network with 100 Mbit/s rate is described in an application to the remote control of a research experiment in real time.
介绍了一种速率为100mbit /s的60 GHz无线网桥在科研实验实时远程控制中的应用。
{"title":"60 GHz radio channel in the research experiment network","authors":"V. Lyubchenko, N. Zaitsev, V.N. Volkov","doi":"10.1109/MIKON.2002.1017815","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017815","url":null,"abstract":"A 60 GHz radio bridge as part of a local area network with 100 Mbit/s rate is described in an application to the remote control of a research experiment in real time.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"43 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114040982","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}
Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017901
S. Koshevaya, V. Grimalsky, J. Sánchez-Mondragón, J. Escobedo-Alatorre, M. Tecpoyotl-Torres
Superheterodyne amplification of sub-millimeter electromagnetic waves in GaAs due to negative differential mobility is analyzed. The nonlinearity arises from the current and the magnetic field of the electromagnetic waves. The case of interaction of two traveling counter-propagating electromagnetic waves and the following space charge wave in an n-GaAs film placed onto an i-GaAs substrate is considered The case of 2D electron gas is also analyzed. The simulation of this nonlinear interaction shows a certain increment of the amplification.
{"title":"Superheterodyne amplification of sub millimeter electromagnetic waves in nGaAs film","authors":"S. Koshevaya, V. Grimalsky, J. Sánchez-Mondragón, J. Escobedo-Alatorre, M. Tecpoyotl-Torres","doi":"10.1109/MIKON.2002.1017901","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017901","url":null,"abstract":"Superheterodyne amplification of sub-millimeter electromagnetic waves in GaAs due to negative differential mobility is analyzed. The nonlinearity arises from the current and the magnetic field of the electromagnetic waves. The case of interaction of two traveling counter-propagating electromagnetic waves and the following space charge wave in an n-GaAs film placed onto an i-GaAs substrate is considered The case of 2D electron gas is also analyzed. The simulation of this nonlinear interaction shows a certain increment of the amplification.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114578845","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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