Pub Date : 2006-05-22DOI: 10.1109/MIKON.2006.4345166
J. Duchiewicz, A. E. Sowa, J. Witkowski, T. Duchiewicz
Fast and sensitive simultaneous measurement of many signals by means of multi-channel coherent receiver is described. All received signals are of different modulating frequencies, synchronous to one reference frequency. The ratio of all modulating signals periods to reference period is an integer. Two practical applications of multi-channel coherent receiver are given: multipoint measurement of electromagnetic field distribution with MST method and two-channel EPR spectrometer.
{"title":"Simultaneous coherent measurement of many h.f. signals","authors":"J. Duchiewicz, A. E. Sowa, J. Witkowski, T. Duchiewicz","doi":"10.1109/MIKON.2006.4345166","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345166","url":null,"abstract":"Fast and sensitive simultaneous measurement of many signals by means of multi-channel coherent receiver is described. All received signals are of different modulating frequencies, synchronous to one reference frequency. The ratio of all modulating signals periods to reference period is an integer. Two practical applications of multi-channel coherent receiver are given: multipoint measurement of electromagnetic field distribution with MST method and two-channel EPR spectrometer.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121670108","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345134
S. Pralgauskaitė, J. Matukas, V. Palenskis, E. Šermukšnis, J. Vyšniauskas
Correlation function method was used for the optical noise investigation in InGaAsP/InP multiple-quantum-well lasers. It was observed that correlation factor between laser optical noises measured by two photodetectors decreases with laser current increasing above threshold. It is found that this correlation factor decrease is determined by fluctuations of directivity diagram of laser radiation in free space. These excess fluctuations can be eliminated using aperture near the laser emission facet that passes only central part of the beam.
{"title":"Correlation Function Method for Semiconductor Laser Optical Noise Investigation and Fluctuations of Directivity Diagram of Laser Radiation","authors":"S. Pralgauskaitė, J. Matukas, V. Palenskis, E. Šermukšnis, J. Vyšniauskas","doi":"10.1109/MIKON.2006.4345134","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345134","url":null,"abstract":"Correlation function method was used for the optical noise investigation in InGaAsP/InP multiple-quantum-well lasers. It was observed that correlation factor between laser optical noises measured by two photodetectors decreases with laser current increasing above threshold. It is found that this correlation factor decrease is determined by fluctuations of directivity diagram of laser radiation in free space. These excess fluctuations can be eliminated using aperture near the laser emission facet that passes only central part of the beam.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"353 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122788707","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345108
D. Vavriv
Recent advances in the design and realization of high-resolution radars for environmental studies are discussed. Two types of such instruments are considered: Doppler, millimeter-wave meteorological radars and an airborne SAR system, which have been developed at the Institute of Radio Astronomy of the National Academy of Sciences of Ukraine. The meteorological radars have been designed for long-term, unattainable operation at remote locates. The SAR system benefits essentially from a novel algorithm, which enables the estimation of the antenna beam orientation angles directly from the radar returns. The SAR with this technique introduced can be operated from small aircrafts without using of a complicated navigation system. The set-up of these instruments, the technical solutions, and the signal processing techniques introduced are discussed. The results obtained during measurement campaigns are presented as well.
{"title":"High-Resolution Radars for Environmental Studies","authors":"D. Vavriv","doi":"10.1109/MIKON.2006.4345108","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345108","url":null,"abstract":"Recent advances in the design and realization of high-resolution radars for environmental studies are discussed. Two types of such instruments are considered: Doppler, millimeter-wave meteorological radars and an airborne SAR system, which have been developed at the Institute of Radio Astronomy of the National Academy of Sciences of Ukraine. The meteorological radars have been designed for long-term, unattainable operation at remote locates. The SAR system benefits essentially from a novel algorithm, which enables the estimation of the antenna beam orientation angles directly from the radar returns. The SAR with this technique introduced can be operated from small aircrafts without using of a complicated navigation system. The set-up of these instruments, the technical solutions, and the signal processing techniques introduced are discussed. The results obtained during measurement campaigns are presented as well.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125567263","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345201
M. Surma
In this paper, the improved asymptotic waveform evaluation (AWE) are outlined as the efficient, based on method-of-moments, technique for obtaining broad-band response of the radiators/scatterers. The proposed approach allows to make conventional AWE techniques more effective with respect to time of analysis and memory requirements. The technique consists in fast algorithm for evaluation of impedance matrix derivatives and current vector derivatives, i.e. the most important elements for AWE technique.
{"title":"Efficient Method for Obtaining Derivatives of Current Vector for AWE Techniques","authors":"M. Surma","doi":"10.1109/MIKON.2006.4345201","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345201","url":null,"abstract":"In this paper, the improved asymptotic waveform evaluation (AWE) are outlined as the efficient, based on method-of-moments, technique for obtaining broad-band response of the radiators/scatterers. The proposed approach allows to make conventional AWE techniques more effective with respect to time of analysis and memory requirements. The technique consists in fast algorithm for evaluation of impedance matrix derivatives and current vector derivatives, i.e. the most important elements for AWE technique.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126271451","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345104
W. Boerner, Kun Shan Chen
Worldwide, medium-to short-term earthquake prediction is becoming ever more essential for safeguarding man due to an un-abating population increase, but hitherto, there have been no verifiable methods of reliable earthquake prediction developed -except for a few isolated examples of such in China and in Greece. This dilemma is a result of previous and still current approaches to earthquake prediction which are squarely based on the seismic measurement of crustal movements, observable only after a tectonic stress-change discharge (earthquake) has occurred. The prediction models derived from past histories of measurements were mainly carried out during the past 40-50 years, although initiated soon after the San Francisco earthquake of 1906. During the past decade it was proved and shown that it is not possible to derive reliable models for earthquake predictions from crustal movement measurements alone - as valuable and as indispensable those indeed are - and that an entirely new approach must be taken and rigorously pursued over many years and decades to come, and most likely throughout this twenty-first century. Of considerable importance will be the full integration of multi-band (P-K Band) repeat-pass differential interferometric Polarimetric Synthetic Aperture Radar (POL-SAR) space borne and high-altitude platform monitoring operations which will be considered here in conjunction with "seismo-electromagnetic " ground measurements. It will be shown that Taiwan is ideally suited for studying earthquake related electromagnetic precursor studies in that the island is separated from other continental regions, and there exist the resources, the dedication and will power for advancing our knowledge most rapidly. Both land-based and sub-oceanic measurement networks already exist, which need to be upgraded and perfected. With the aid of experienced and knowledgeable experts, this will be done soon.
{"title":"Implementation of differential repeat-pass SAR interferometry for (i) the search for earthquake precursory land-cover deformation in Taiwan in co-ordination with the integrated Search for Taiwanese Earthquake Precursors iSTEP' Taiwanese program for promoting research excellence; and (ii) the assessm","authors":"W. Boerner, Kun Shan Chen","doi":"10.1109/MIKON.2006.4345104","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345104","url":null,"abstract":"Worldwide, medium-to short-term earthquake prediction is becoming ever more essential for safeguarding man due to an un-abating population increase, but hitherto, there have been no verifiable methods of reliable earthquake prediction developed -except for a few isolated examples of such in China and in Greece. This dilemma is a result of previous and still current approaches to earthquake prediction which are squarely based on the seismic measurement of crustal movements, observable only after a tectonic stress-change discharge (earthquake) has occurred. The prediction models derived from past histories of measurements were mainly carried out during the past 40-50 years, although initiated soon after the San Francisco earthquake of 1906. During the past decade it was proved and shown that it is not possible to derive reliable models for earthquake predictions from crustal movement measurements alone - as valuable and as indispensable those indeed are - and that an entirely new approach must be taken and rigorously pursued over many years and decades to come, and most likely throughout this twenty-first century. Of considerable importance will be the full integration of multi-band (P-K Band) repeat-pass differential interferometric Polarimetric Synthetic Aperture Radar (POL-SAR) space borne and high-altitude platform monitoring operations which will be considered here in conjunction with \"seismo-electromagnetic \" ground measurements. It will be shown that Taiwan is ideally suited for studying earthquake related electromagnetic precursor studies in that the island is separated from other continental regions, and there exist the resources, the dedication and will power for advancing our knowledge most rapidly. Both land-based and sub-oceanic measurement networks already exist, which need to be upgraded and perfected. With the aid of experienced and knowledgeable experts, this will be done soon.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129987156","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345308
P. Miazga
Merging optimization techniques and simulation technologies presents an opportunity for creation of optimal structure, bypassing expensive and time consuming process of model construction and measurement. However simulation process for a complicated circuit may take significantly long time, which grows with increasing of model accuracy. Optimization process may call for simulation (depending on count of varying parameters, and circuit behavior) tens, hundreds or even thousand times. The two design requirements: create project in a reasonable time with a reasonable accuracy, conflict one with each other. In practice the design engineer insist on using the fastest simulation model possible. The trap associated with this approach is discussed in presented paper. An influence of simulation model accuracy on convergence of optimization process and exactness of the final result is discussed.
{"title":"Simulation Optimization of Electromagnetic Structure - Case Study","authors":"P. Miazga","doi":"10.1109/MIKON.2006.4345308","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345308","url":null,"abstract":"Merging optimization techniques and simulation technologies presents an opportunity for creation of optimal structure, bypassing expensive and time consuming process of model construction and measurement. However simulation process for a complicated circuit may take significantly long time, which grows with increasing of model accuracy. Optimization process may call for simulation (depending on count of varying parameters, and circuit behavior) tens, hundreds or even thousand times. The two design requirements: create project in a reasonable time with a reasonable accuracy, conflict one with each other. In practice the design engineer insist on using the fastest simulation model possible. The trap associated with this approach is discussed in presented paper. An influence of simulation model accuracy on convergence of optimization process and exactness of the final result is discussed.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"142 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129271378","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345310
N. Don, A. Kirilenko
The property of multi-aperture irises to cause the rejection phenomena because of the interaction of two or more "iris aperture" eigen oscillations is used to propose the simplest rejection section in a circular waveguide. As an iris limiting case the set of narrow azimuth-placed arc-shaped slots with a large central aperture has been studied. Saving the low insertion loss near the stopband frequency these sections can reject the TE11 and TM01 modes totally and partially the other ones.
{"title":"The Simplest Notch Rejection Sections in the Circular Waveguide","authors":"N. Don, A. Kirilenko","doi":"10.1109/MIKON.2006.4345310","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345310","url":null,"abstract":"The property of multi-aperture irises to cause the rejection phenomena because of the interaction of two or more \"iris aperture\" eigen oscillations is used to propose the simplest rejection section in a circular waveguide. As an iris limiting case the set of narrow azimuth-placed arc-shaped slots with a large central aperture has been studied. Saving the low insertion loss near the stopband frequency these sections can reject the TE11 and TM01 modes totally and partially the other ones.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128556621","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345173
I. Bragin, V. P. Sgibnev, S. I. Bragin, T. B. Shevaldykina, M. B. Kamenkov, N. Maslova, E. L. Elizavetova, I. V. Istyakov, J.B. Bragina, D. Khidasheli, Y. Zhou, F. Zerrouk
The article shows the way to decrease temperature measurement error by reduction of influence of reflection coefficient from skin. The scheme of a radiometric receiver with feedback in high frequency section is represented. This kind of scheme compensates signal decrease due to antenna mismatch. The article provides a description of the radiometric complex structure.
{"title":"Radiometric Complex for Determination Man Temperature Profile","authors":"I. Bragin, V. P. Sgibnev, S. I. Bragin, T. B. Shevaldykina, M. B. Kamenkov, N. Maslova, E. L. Elizavetova, I. V. Istyakov, J.B. Bragina, D. Khidasheli, Y. Zhou, F. Zerrouk","doi":"10.1109/MIKON.2006.4345173","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345173","url":null,"abstract":"The article shows the way to decrease temperature measurement error by reduction of influence of reflection coefficient from skin. The scheme of a radiometric receiver with feedback in high frequency section is represented. This kind of scheme compensates signal decrease due to antenna mismatch. The article provides a description of the radiometric complex structure.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"33 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120993841","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345329
I. Bragin, V. P. Sgibnev, M. B. Kamenkov, S. I. Bragin, T. B. Shevaldykina, A. A. Morozov, A. S. Chebotarev, B. N. Savin, N. Maslova, E. L. Elizavetova, D. Khidasheli
Results of development of space-based radiometric receivers in a frequency range 10 GHz ... 206 GHz is considered. Are resulted technical characteristics the developed radiometric systems intended for remote sensing of a surface of the Earth (including ocean) and atmosphere. Results of flight measurements also are submitted.
{"title":"Results of Development of Radiometric Receivers mm and Submillimeter Range","authors":"I. Bragin, V. P. Sgibnev, M. B. Kamenkov, S. I. Bragin, T. B. Shevaldykina, A. A. Morozov, A. S. Chebotarev, B. N. Savin, N. Maslova, E. L. Elizavetova, D. Khidasheli","doi":"10.1109/MIKON.2006.4345329","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345329","url":null,"abstract":"Results of development of space-based radiometric receivers in a frequency range 10 GHz ... 206 GHz is considered. Are resulted technical characteristics the developed radiometric systems intended for remote sensing of a surface of the Earth (including ocean) and atmosphere. Results of flight measurements also are submitted.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121189664","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 : 2006-05-22DOI: 10.1109/MIKON.2006.4345205
Chen Tianzhou, Lou Jizhou, Huang Jiangwei
This paper introduces a t-weighted routing algorithm to maximize the lifetime of ad-hoc networks. We consider the weight t of an edge as two parts: the time remaining for the transmission node to transmit data, and the time remaining for the receiving node to receive and forward data. To get the value of t, we apply a method called one node look-ahead (ONL). Then we bring forward a power-aware routing algorithm based on t to maximize the lifetime of networks. Simulation results show that our t-based lifetime maximization algorithm has a great effect on the improvement of ad-hoc networks' lifetime.
{"title":"A T-Based Lifetime Maximization Algorithm for Ad-Hoc Networks","authors":"Chen Tianzhou, Lou Jizhou, Huang Jiangwei","doi":"10.1109/MIKON.2006.4345205","DOIUrl":"https://doi.org/10.1109/MIKON.2006.4345205","url":null,"abstract":"This paper introduces a t-weighted routing algorithm to maximize the lifetime of ad-hoc networks. We consider the weight t of an edge as two parts: the time remaining for the transmission node to transmit data, and the time remaining for the receiving node to receive and forward data. To get the value of t, we apply a method called one node look-ahead (ONL). Then we bring forward a power-aware routing algorithm based on t to maximize the lifetime of networks. Simulation results show that our t-based lifetime maximization algorithm has a great effect on the improvement of ad-hoc networks' lifetime.","PeriodicalId":315003,"journal":{"name":"2006 International Conference on Microwaves, Radar & Wireless Communications","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127193846","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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