The evolution of short-superwide-band electromagnetic pulses (EMP) excited by rectangular aperture antennas is investigated. The existence of the range of pulse and antenna parameters is demonstrated, at which the pulse propagates with negligible loss of energy (phenomenon of electromagnetic missile). On the basis of exact solution of the diffraction problem and the numerical treatment of results the evolution of EMP shape is ivestigated and described.
{"title":"The emp radiation by aperture antennas","authors":"V. Balakirev, G. L. Sidel’nikov","doi":"10.1109/AEM.1996.872852","DOIUrl":"https://doi.org/10.1109/AEM.1996.872852","url":null,"abstract":"The evolution of short-superwide-band electromagnetic pulses (EMP) excited by rectangular aperture antennas is investigated. The existence of the range of pulse and antenna parameters is demonstrated, at which the pulse propagates with negligible loss of energy (phenomenon of electromagnetic missile). On the basis of exact solution of the diffraction problem and the numerical treatment of results the evolution of EMP shape is ivestigated and described.","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123845900","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":"Doppler HF radar measurements of backscattered signals induced by small-scale field-aligned irregularities of subpolar f-region ionosphere","authors":"V. P. Uryadov, O. Maksimenko, X. M. Boguta","doi":"10.1109/AEM.1996.873169","DOIUrl":"https://doi.org/10.1109/AEM.1996.873169","url":null,"abstract":"","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123458431","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}
The use of microstrip printed circular antennas is an alternative approach. These antennas have low profile and can be easily connected to the back side of the handset, providing a nice-looking and compact device. In addition, they are light, compact and easy to fabricate In this paper, antennas of this kind were developed and measured, both at 900 MHz and 1.8 GHz. Essential characteristics for the implementation of these antennas were the low cost of fabrication (by using cheap substrate material), achievement of a radiation pattern with high front-to-back ratio, in order to significantly reduce the amount of electroinagnetic radiation to which the user would be exposed, and reflection coefficient and efficiency, similar to those of monopole antennas
{"title":"Microstrip circular antennas operating at 900 MHz and 1.8 GHz","authors":"C. Capsalis, F. E. Vellis, P. Trakadas","doi":"10.1109/AEM.1996.872836","DOIUrl":"https://doi.org/10.1109/AEM.1996.872836","url":null,"abstract":"The use of microstrip printed circular antennas is an alternative approach. These antennas have low profile and can be easily connected to the back side of the handset, providing a nice-looking and compact device. In addition, they are light, compact and easy to fabricate In this paper, antennas of this kind were developed and measured, both at 900 MHz and 1.8 GHz. Essential characteristics for the implementation of these antennas were the low cost of fabrication (by using cheap substrate material), achievement of a radiation pattern with high front-to-back ratio, in order to significantly reduce the amount of electroinagnetic radiation to which the user would be exposed, and reflection coefficient and efficiency, similar to those of monopole antennas","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114867059","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}
It is known, that a slot antenna, placed immediately on the ground surface, provides low radiation into the air and low coupling between transmitting and receiving antennas. A "front to back ratio" is much greater then that for an electric dipole. This work is devoted to the investigation of a slot antenna (Fig. 1), placed at a small height h<0.02-0.05 /spl lambda/ above the ground surface.
{"title":"Analysis of characteristics of a slot antenna used in georadar","authors":"S. Druchinin","doi":"10.1109/AEM.1996.872867","DOIUrl":"https://doi.org/10.1109/AEM.1996.872867","url":null,"abstract":"It is known, that a slot antenna, placed immediately on the ground surface, provides low radiation into the air and low coupling between transmitting and receiving antennas. A \"front to back ratio\" is much greater then that for an electric dipole. This work is devoted to the investigation of a slot antenna (Fig. 1), placed at a small height h<0.02-0.05 /spl lambda/ above the ground surface.","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127980248","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":"Electromagnetic scatering by arbitrary dielectric bodies","authors":"B. Notaroš, B. Popovic","doi":"10.1109/AEM.1996.873055","DOIUrl":"https://doi.org/10.1109/AEM.1996.873055","url":null,"abstract":"","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128004044","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":"Research on passive microwave remote sensing of soils and vegetation at the institute of electronics - BAS","authors":"B.I. Vichey, K. Kostov, E. Krasteva","doi":"10.1109/AEM.1996.873180","DOIUrl":"https://doi.org/10.1109/AEM.1996.873180","url":null,"abstract":"","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121686932","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}
Applications of the solid state nuclear track detectors (SSNTD) face the problem of rapid estimation of track density. While visual counting or the employment of sophisticated image analysis systems ensure accurate determination of number of tracks, other techniques are devoted to the non-expensive and fast assessment of the track density. In this work we present a fast, non-destructive method for estimation of SSNTD track density. It employs laser beam, which incident on the detector/air interface so that Total Internal Reflection (TIR) occurs on the smooth surface but not on the etched tracks. The experimental results suggest that in the present version the method gives reliable results for track densities /spl ges/ l0/sup 3/tr.cm/sup -2/ (the sensitivity was determined to be about 500tr.cm/sup -2/).
{"title":"Rapid track density determination of ssntd by frustration of total internal reflection of laser beam","authors":"P. Popov, D. Presiyanov, A. Ogoyski","doi":"10.1109/AEM.1996.873162","DOIUrl":"https://doi.org/10.1109/AEM.1996.873162","url":null,"abstract":"Applications of the solid state nuclear track detectors (SSNTD) face the problem of rapid estimation of track density. While visual counting or the employment of sophisticated image analysis systems ensure accurate determination of number of tracks, other techniques are devoted to the non-expensive and fast assessment of the track density. In this work we present a fast, non-destructive method for estimation of SSNTD track density. It employs laser beam, which incident on the detector/air interface so that Total Internal Reflection (TIR) occurs on the smooth surface but not on the etched tracks. The experimental results suggest that in the present version the method gives reliable results for track densities /spl ges/ l0/sup 3/tr.cm/sup -2/ (the sensitivity was determined to be about 500tr.cm/sup -2/).","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115776590","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":"Application of quasi - distance measurement technique to the pulse phase radio distance measurement system (PPRDMS)","authors":"T. Petrov, V. I. Ivanov, P.T. Roussanov","doi":"10.1109/AEM.1996.873201","DOIUrl":"https://doi.org/10.1109/AEM.1996.873201","url":null,"abstract":"","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134173992","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}
In the paper, two-dimensional problems of optimization of continuous parameters of the antennas with semitransparent surfaces are considered. The problems concern the resonant antenna (E-polarization case) and leaky-wave antenna (H-polarization case).
{"title":"Optimization of plane resonant and leaky-waves antennas with semitransparent aperture","authors":"R. I. Germanyuk, N. N. Voitovich, O. Zamorska","doi":"10.1109/AEM.1996.872844","DOIUrl":"https://doi.org/10.1109/AEM.1996.872844","url":null,"abstract":"In the paper, two-dimensional problems of optimization of continuous parameters of the antennas with semitransparent surfaces are considered. The problems concern the resonant antenna (E-polarization case) and leaky-wave antenna (H-polarization case).","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131475767","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":"Retrieval of radiation current from date of measure electromagnetic field in wave and quasi-static zones","authors":"V. Korotkov","doi":"10.1109/AEM.1996.873049","DOIUrl":"https://doi.org/10.1109/AEM.1996.873049","url":null,"abstract":"","PeriodicalId":445510,"journal":{"name":"Trans Black Sea Region Symposium on Applied Electromagnetism","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132600081","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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