{"title":"A high performance ultrawideband orthomode transducer and a dual-polarized quad-ridged horn antenna based on it","authors":"F. Dubrovka, S. Piltyay","doi":"10.1109/ICATT.2011.6170737","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170737","url":null,"abstract":"A new designs of an ultrawideband (1–15 GHz) orthomode transducer and a dual-polarized quad-ridged horn antenna based on it are presented. In the operating frequency range VSWR of the orthomode transducer doesn't exceed 1.8 and the antenna's VSWR doesn't exceed 2.1. Isolation between two ports with orthogonal linear polarizations is higher than 40 dB and the antenna's gain varies from 5 to 14 dB.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129239249","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":"Several novel wire antenna designs with the quasi-isotropic radiation patterns in horizontal plane","authors":"O. Yurtsev, Y. Bobkov, S. Baty","doi":"10.1109/ICATT.2011.6170745","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170745","url":null,"abstract":"The work deals with numerical modeling results of two wire antennas that have quasi-isotropic radiation patterns in one of the main planes. First antenna is a modified Franklin antenna, which provides wider frequency bandwidth according to feed matching criteria. This antenna have isotropic radiation pattern in H-plane. It is series-fed antenna array. Second antenna is a modification of loop antennas with loops perimeter equal to one and two wavelengths. The loops in this antenna are bowed on some angle. It forms quasi-isotropic radiation pattern in bowed plane. In H-plane the antenna is a linear series-fed antenna array. The antennas were modeled using method of moment. The dimensions of antennas were optimized using crite-rias of matching and reaching of omnidirectional radiation pattern in horizontal plane.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126908670","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":"Wavefield control in multimode channels by the use of source arrays, with application to shallow-water sound","authors":"A. G. Luchinin, A. Malekhanov, A. I. Khil’ko","doi":"10.1109/ICATT.2011.6170712","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170712","url":null,"abstract":"An intrinsic feature of the long-range signal propagation in random-inhomogeneous multimode waveguides is well known to be the signal loss and coherence degradation. These key factors are both dependent on the signal modal spectrum due to the fact that the signal-carrying modes essentially differ in their decay coefficients and effects on the signal fluctuations and the coherence length both in temporal and spatial domains (for a given distance from the source). Moreover, the output performance of signal processing against the nose background in such a scenario is also critical to the modal interference if this noise is intensive enough as is compared with the non-modal (for example, isotropic) ambient noise and/or sensor noise of the receiving system. In this paper, we give a short overview of our recent research focused on the effective wavefield control in multimode channels by the use of source arrays, the amplitude-and-phase distributions of which vary to control the signal modal spectrum at the channel ‘input’. The field experiments have been realized in a typical shallow-water sound channel, and their results show the practical application of the approach presented.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126327559","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":"Analysis of natural frequency and Q-factor estimation for open dielectric resonators with variation of coupling by means of fractional-rational approximation of reflection response","authors":"M. Andreev, O. Drobakhin, D. Saltykov","doi":"10.1109/ICATT.2011.6170777","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170777","url":null,"abstract":"The analysis of the natural frequency and estimation of Q-factor of the open resonator by means of fractional-rational approximation of the reflection response has been considered. An advantage of the proposed technique in comparison with the classical methods has been demonstrated. Dependence of Q-factor of the shielded half-disk dielectric resonator and estimations of the poles and the zeros of the resonance response against the coupling coefficient value has been analyzed.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131889494","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":"The multiband antenna","authors":"A. Savochkin, A. Nudga","doi":"10.1109/ICATT.2011.6170738","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170738","url":null,"abstract":"We developed a version of the multiband antenna. The frequency dependence of input impedance and voltage standing wave ratio (VSWR) are determined. The eighteen versions of antennas with different widths of the exciting slots and different values of similarity are investigated. Antenna is studied experimentally with the given specifications. An expression for estimating the coefficient of proportionality is obtained.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130834170","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}
V. Kizimenko, D. Moskaliov, N. Naumovich, O. Yurtsev
{"title":"The influence of interchannel and intrachannel nonidentities on antenna array characteristics","authors":"V. Kizimenko, D. Moskaliov, N. Naumovich, O. Yurtsev","doi":"10.1109/ICATT.2011.6170726","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170726","url":null,"abstract":"The influence of interchannel and intrachannel non-identities on digital antenna array characteristics is studied. Non-identities are random amplitude and phase excitation errors of receive/transmit modules. Cases of fast and slow fluctuations of random errors are considered. Variation frequency of fast fluctuations is much greater than scanning frequency. Variation frequency of slow fluctuations is much less than frequency of scanning.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131039927","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":"Adaptive antenna with control of a signal on the station of troposphere communication","authors":"V. I. Rudakov, A. Gupalo, A. Kravchenko","doi":"10.1109/ICATT.2011.6170770","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170770","url":null,"abstract":"In the presentation is decides scientific problem of the application control a signals output of adaptive antenna for compares there with signals output receiver of communication troposphere station. This control dose imposable increased reliability of the station.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131139427","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":"Synthesis of amplitude radiation pattern for plane waveguide array using the variational approach and method of aperture orthogonal polynomials","authors":"M. Andriychuk, V. Tkachuk","doi":"10.1109/ICATT.2011.6170750","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170750","url":null,"abstract":"The synthesis problem of waveguide array according to the prescribed amplitude radiation pattern is considered. The mutual coupling of the separate elements of array is taken into account in the process of solution of a direct problem (analysis problem). Variational statement of the synthesis problem and application of the aperture orthogonal polynomials (AOP) method, are considered as alternative approaches to solve the synthesis problem. The functional representing a mean-square deviation of the prescribed and received amplitude radiation patterns is minimized, as well as the expansion of sought amplitude-phase distribution of current in the series by some kind of AOP that implies the finding the expansion coefficients, are used for determination of the optimal amplitude distributions of current in array. The modeling results are presented.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129566340","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":"Receiving linear antenna arrays integrated with CdHgTe hot-electron bolometer for THz imaging systems","authors":"F. Dubrovka, D. Krasilnikov, V. Petriakov","doi":"10.1109/ICATT.2011.6170733","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170733","url":null,"abstract":"Results of modelling and optimization of receiving linear antenna arrays for THz continuous-wave imaging systems, which consist of antennas integrated with hot-electron bolometers on the basis of sensitive structures of CdHgTe (cadmium-mercury-tellurium) type as a detectors of signals, are presented.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130235903","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":"Antennas based on dielectric resonators and microstrip lines in case of their orthogonal mutual orientation","authors":"I. V. Trabarov","doi":"10.1109/ICATT.2011.6170730","DOIUrl":"https://doi.org/10.1109/ICATT.2011.6170730","url":null,"abstract":"The method of excitation the system of cylindrical dielectric resonators by a microstrip line using their orthogonal mutual orientation is introduced. The design of a dielectric resonator antenna based on such an excitation method is described. The analytical expression for determining the value of coupling coefficient between a resonator and feeding microstrip line is given. An approach to determining antenna characteristics is stated. The comparison between measurements and analytical estimation of antenna characteristics is given.","PeriodicalId":433613,"journal":{"name":"2011 VIII International Conference on Antenna Theory and Techniques","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133645640","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}