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2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory最新文献

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Electromagnetic waves in a waveguide with a magnetoactive anisotropic periodically modulated filling 磁有源各向异性周期性调制填充波导中的电磁波
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671815
E. Gevorkyan
{"title":"Electromagnetic waves in a waveguide with a magnetoactive anisotropic periodically modulated filling","authors":"E. Gevorkyan","doi":"10.1109/DIPED.2008.4671815","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671815","url":null,"abstract":"Interaction of transverse-electric (TE) waves with magneto-active anisotropic periodically modulated in space and time filling of the waveguide with arbitrary cross section is considered. The wave equation for the potential of TE field is derived from the Maxwell equations. The method of solving of the wave equation is developed. Under the assumption that the modulation indexes are small, analytical expressions for the TE field are found in the region of weak interaction between the signal wave and the modulation wave.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114379516","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}
引用次数: 3
Application of modified Newton method to nonlinear integral equation of circular antenna synthesis problem 修正牛顿法在圆天线综合问题非线性积分方程中的应用
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671824
M. Andriychuk, O. O. Bulatsyk, N. N. Voitovich
{"title":"Application of modified Newton method to nonlinear integral equation of circular antenna synthesis problem","authors":"M. Andriychuk, O. O. Bulatsyk, N. N. Voitovich","doi":"10.1109/DIPED.2008.4671824","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671824","url":null,"abstract":"An equation arisen in the synthesis problem of antenna systems according to the prescribed amplitude radiation pattern is investigated. The proposed modification of the Newton method allows finding the branched solutions depending on the value of characteristic physical parameter. The algorithm is described and numerical results are presented.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133452010","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}
引用次数: 1
On the control of radiation directivity of elementary source coupled in electromagnetic crystals 电磁晶体中耦合基源辐射指向性的控制
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671819
V. Jandieri
{"title":"On the control of radiation directivity of elementary source coupled in electromagnetic crystals","authors":"V. Jandieri","doi":"10.1109/DIPED.2008.4671819","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671819","url":null,"abstract":"A directivity of radiation from a line source coupled to 2D electromagnetic crystals is investigated using a Fabry-Perot resonator model for the coupled radiating structure. It is shown that the directivity is characterized by the transmission windows of the electromagnetic crystals in the frequency and angular spectral domains and the transverse resonance condition in the space surrounded by the electromagnetic crystals. A directivity diagram that relates the transmission and reflection spectra of electromagnetic crystals and the size of the resonator to the radiation patterns attainable by a line source is presented. Several numerical examples validate the usefulness of the diagram for designing unique electromagnetic crystal antennas.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129013080","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}
引用次数: 0
About the electromagnetic compatibility of dipole antenna 关于偶极子天线的电磁兼容性
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671807
G. Kevanishvili, Z. Sikmashvili, I. Kevanishvili, K. Kotetishvili, A.B. Asanidze, G. Chikhladze
{"title":"About the electromagnetic compatibility of dipole antenna","authors":"G. Kevanishvili, Z. Sikmashvili, I. Kevanishvili, K. Kotetishvili, A.B. Asanidze, G. Chikhladze","doi":"10.1109/DIPED.2008.4671807","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671807","url":null,"abstract":"The electromagnetic compatibility (EMC) of an active dipole is investigated by new method. On first stage, the new, correct solution of Hallenpsilas integral equation is given relative to the axial current of the dipole. It is shown that this solution besides sinusoidal (classic) term, considered by the action of e.m.f. applied to the center of the dipole, contains new terms as well, created by interference of the fields radiated by the different arms of the dipole. The so-called compatibility function is introduced, being the modulus of the integral field in far zone. The analysis of this function makes possible satisfactorily characterize the EMC of the dipole. The great number of numerous results is presented, proving the effectiveness of the method of estimation and improvement of the EMC of the antenna.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114184217","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}
引用次数: 5
Matching the complex impedance of the body with the field of incident wave 将物体的复杂阻抗与入射波场进行匹配
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671790
B. Katsenelenbaum
{"title":"Matching the complex impedance of the body with the field of incident wave","authors":"B. Katsenelenbaum","doi":"10.1109/DIPED.2008.4671790","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671790","url":null,"abstract":"An electromagnetic wave falls onto a body. The body position is fixed with respect to the wave. The surface impedance of the body can be matched with the wave field structure in such a way that the scattered field is small in the direction opposite to that of the incoming wave as well as in the close directions. The matching means that the impedance at each point of the illuminated surface provides the same relation of tangential components of the electric and magnetic fields as in the incident wave. If the incident wave is the plane one, then the matching impedance is real.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115914030","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}
引用次数: 0
Acoustic imaging using a maximum likelihood approach 使用最大似然方法的声学成像
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671833
Y. Kerner, M. Porat
{"title":"Acoustic imaging using a maximum likelihood approach","authors":"Y. Kerner, M. Porat","doi":"10.1109/DIPED.2008.4671833","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671833","url":null,"abstract":"We develop a new method to exploit pairs of acoustic scans of the same image with the aim of enhancing the quality of acoustic imaging. Each image pair is assumed to be co-registered with 90deg separation between the two insonification directions. Using multi-channel image restoration, the proposed approach provides significant improvement in the quality of ultrasound imaging. Enhanced images are presented, and the advantages of this new approach over presently available methods are discussed.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"626 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123273124","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}
引用次数: 2
The method of minimum of duration in application to permittivity profile reconstruction 最小持续时间法在介电常数剖面重建中的应用
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671800
S. Alexin, O. Antropov, O. Drobakhin
{"title":"The method of minimum of duration in application to permittivity profile reconstruction","authors":"S. Alexin, O. Antropov, O. Drobakhin","doi":"10.1109/DIPED.2008.4671800","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671800","url":null,"abstract":"A new approach to permittivity profile reconstruction based on impulse reflection response processing is considered. The impulse response data is examined to be obtained with use of microwave reflection coefficient data extrapolation technique completed with discrete Fourier transform. The extrapolation is carried through special functional minimization procedure providing minimum of quasiduration of impulse response (method of minimum of duration, MMD). Results of numerical data processing using Gelpsilafand-Levitan iterative scheme for permittivity profile reconstruction are presented.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124461775","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}
引用次数: 0
Diffraction of the electromagnetic wave on the tape lattice located above shielded anizotropic environment 电磁波在位于屏蔽各向异性环境之上的带晶格上的衍射
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671799
V. A. Abdulkadyrov, G. N. Gestrina
{"title":"Diffraction of the electromagnetic wave on the tape lattice located above shielded anizotropic environment","authors":"V. A. Abdulkadyrov, G. N. Gestrina","doi":"10.1109/DIPED.2008.4671799","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671799","url":null,"abstract":"Interaction of an electromagnetic wave with an anisotropic substrate in presence of periodic shields has been investigated. The fields reflected from the structure have been obtained in analytic form. The electrodynamic approach for finding a scattered field from plane periodic shields above a full anisotropy medium placed on the conducting plane, is suggested. The analytical expressions for the components of a scattered electromagnetic field are obtained.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131890479","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}
引用次数: 0
Analysis of antenna characteristics in a Fresnel zone 菲涅耳区天线特性分析
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671805
B. Levin
{"title":"Analysis of antenna characteristics in a Fresnel zone","authors":"B. Levin","doi":"10.1109/DIPED.2008.4671805","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671805","url":null,"abstract":"The method of calculating measurement error of directivity characteristics for antenna placed in a Fresnel zone is presented. The method of account is based on substitution of a plane area field with rays converging to an observation point by a no plane area field with parallel rays.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"55 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123424047","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}
引用次数: 3
Reconstructing the acoustic pressure field based on ellipsoidal coordinate 基于椭球坐标的声压场重构
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671831
Yang Ruiliang, Gao Long
{"title":"Reconstructing the acoustic pressure field based on ellipsoidal coordinate","authors":"Yang Ruiliang, Gao Long","doi":"10.1109/DIPED.2008.4671831","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671831","url":null,"abstract":"A new formulation based on ellipsoid coordinate is proposed to describe acoustic pressure in the acoustic field, which is suitable for reconstructing acoustic pressures field radiated not only from a sphere or an ellipsoid, but also from other sources similar to an ellipsoid, which extends the appropriate application domain of traditional HELS largely.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128621102","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}
引用次数: 2
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