Pub Date : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637353
A. Askarpour, P. Uslenghi
An oblate semi-spheroidal cavity is flush mounted under a metal plane, is filled with DNG metamaterial, and is excited by an axial electric dipole. The fields are found analytically everywhere as infinite series of oblate spheroidal wave functions whose expansion coefficients are determined explicitly, thus yielding a new canonical solution to a boundary-value problem.
{"title":"Radiation from an electric dipole axially mounted above a spheroidal cavity filled with DNG metamaterial","authors":"A. Askarpour, P. Uslenghi","doi":"10.1109/URSI-EMTS.2010.5637353","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637353","url":null,"abstract":"An oblate semi-spheroidal cavity is flush mounted under a metal plane, is filled with DNG metamaterial, and is excited by an axial electric dipole. The fields are found analytically everywhere as infinite series of oblate spheroidal wave functions whose expansion coefficients are determined explicitly, thus yielding a new canonical solution to a boundary-value problem.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133923692","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637118
J. Stahl, D. Kuebrich, T. Duerbaum
The compliance with standards calls for proper designed EMI filters. EMI typically comprises common mode (cm) and differential mode (dm) noise. A systematic optimization of EMI filters requires the knowledge of the contribution and distribution of these two noise sources. The paper discusses different methods that allow the independent measurement of cm and dm noise. One suitable method described in detail integrates the separation set-up into the Line Impedance Stabilization Network (LISN). However, a correct interpretation of the measured results requires a characterization of the unavoidable crosstalk of the complete set-up - i.e. the measured level at the dm output in case of pure cm excitation and vice versa. As shown in this paper, the implementation of a standard LISN introduces the highest amount of imperfections causing the undesired crosstalk. Thus, for the first time, this paper describes the characterization of the whole set-up including the LISN.
{"title":"Characterisation of an effective EMI noise separation including a standard LISN","authors":"J. Stahl, D. Kuebrich, T. Duerbaum","doi":"10.1109/URSI-EMTS.2010.5637118","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637118","url":null,"abstract":"The compliance with standards calls for proper designed EMI filters. EMI typically comprises common mode (cm) and differential mode (dm) noise. A systematic optimization of EMI filters requires the knowledge of the contribution and distribution of these two noise sources. The paper discusses different methods that allow the independent measurement of cm and dm noise. One suitable method described in detail integrates the separation set-up into the Line Impedance Stabilization Network (LISN). However, a correct interpretation of the measured results requires a characterization of the unavoidable crosstalk of the complete set-up - i.e. the measured level at the dm output in case of pure cm excitation and vice versa. As shown in this paper, the implementation of a standard LISN introduces the highest amount of imperfections causing the undesired crosstalk. Thus, for the first time, this paper describes the characterization of the whole set-up including the LISN.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131599633","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637056
D. Weile, Y. Lin
The finite difference delay modeling method is applied to the solution of two-dimensional electromagnetic scattering problems. The spatial discretization is carried out by the locally corrected Nyström method with arbitrary, analytically-described geometry models to achieve a method that exhibits higher-order convergence in both space and time. The efficacy and accuracy of the method are demonstrated with numerical results.
{"title":"Using finite difference delay modeling and the Nyström method for the discretization of two-dimensional scattering problems","authors":"D. Weile, Y. Lin","doi":"10.1109/URSI-EMTS.2010.5637056","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637056","url":null,"abstract":"The finite difference delay modeling method is applied to the solution of two-dimensional electromagnetic scattering problems. The spatial discretization is carried out by the locally corrected Nyström method with arbitrary, analytically-described geometry models to achieve a method that exhibits higher-order convergence in both space and time. The efficacy and accuracy of the method are demonstrated with numerical results.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"33 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133183856","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5636982
J. Kataja
Representation of dipole antennas as arc-length parametrized curves is presented and such representation is used to find optimal antenna shapes of given size constraints and impedance in two and three dimensions.
{"title":"On shape optimization of wire dipole antennas","authors":"J. Kataja","doi":"10.1109/URSI-EMTS.2010.5636982","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5636982","url":null,"abstract":"Representation of dipole antennas as arc-length parametrized curves is presented and such representation is used to find optimal antenna shapes of given size constraints and impedance in two and three dimensions.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133195131","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5636990
W. Hoefer
The computational reversal of time and the method of monochromatic field injection are discussed in the context of electromagnetic structure synthesis and the realization of material profiles using space- and time-discrete electromagnetic algorithms, notably the Transmission Line Matrix (TLM) method. Salient properties of theses procedure, including uniqueness, resolution, and minimum loss are considered.
{"title":"Time reversal and optimal electromagnetic structure synthesis","authors":"W. Hoefer","doi":"10.1109/URSI-EMTS.2010.5636990","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5636990","url":null,"abstract":"The computational reversal of time and the method of monochromatic field injection are discussed in the context of electromagnetic structure synthesis and the realization of material profiles using space- and time-discrete electromagnetic algorithms, notably the Transmission Line Matrix (TLM) method. Salient properties of theses procedure, including uniqueness, resolution, and minimum loss are considered.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128883958","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637033
C. Eyraud, J. Geffrin, A. Litman
We propose a quantitative reconstruction of an aggregate of spheres from microwave experimental data. A joint work between the inversion developments and the experimental ones has been necessary to image accurately this complex shape target. Indeed, the current target is an assembly of very small particles with respect to the wavelength. The challenge was both to be able to measure its scattered field and to retrieve its intrinsic details. In particular, we took into account the real random noise with a Bayesian formulation.
{"title":"3D Quantitative imaging of a complex shape target from microwave scattering measurements","authors":"C. Eyraud, J. Geffrin, A. Litman","doi":"10.1109/URSI-EMTS.2010.5637033","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637033","url":null,"abstract":"We propose a quantitative reconstruction of an aggregate of spheres from microwave experimental data. A joint work between the inversion developments and the experimental ones has been necessary to image accurately this complex shape target. Indeed, the current target is an assembly of very small particles with respect to the wavelength. The challenge was both to be able to measure its scattered field and to retrieve its intrinsic details. In particular, we took into account the real random noise with a Bayesian formulation.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"206 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131846972","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637155
B. Witzigmann
This paper gives an overview of physics-based modeling of semiconductor optoelectronic devices, which are key components in fields such as photovoltaics, solid-state lighting, communications and sensing. Despite this broad application range, some common underlying theory can be identified: accurate modeling of light-matter interaction, semi-coherent carrier transport in nanostructures, accurate calculation of electromagnetic characteristics. In this contribution, a selection of models and devices are discussed and their applicability for analysis purposes is demonstrated
{"title":"Computational optoelectronics as analysis and design tool","authors":"B. Witzigmann","doi":"10.1109/URSI-EMTS.2010.5637155","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637155","url":null,"abstract":"This paper gives an overview of physics-based modeling of semiconductor optoelectronic devices, which are key components in fields such as photovoltaics, solid-state lighting, communications and sensing. Despite this broad application range, some common underlying theory can be identified: accurate modeling of light-matter interaction, semi-coherent carrier transport in nanostructures, accurate calculation of electromagnetic characteristics. In this contribution, a selection of models and devices are discussed and their applicability for analysis purposes is demonstrated","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115785234","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637268
M. Heckler, A. Dreher
This paper describes a technique known as discrete mode matching, which is suitable for the full-wave simulation of conformal microstrip structures. This contribution presents the theory behind this method, along with the analysis of microstrip lines and antennas conformed on cylindrical surfaces. The results have been compared with data obtained using other techniques and good agreement has been verified.
{"title":"Full-wave and fast analysis of conformal microstrip lines and antennas","authors":"M. Heckler, A. Dreher","doi":"10.1109/URSI-EMTS.2010.5637268","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637268","url":null,"abstract":"This paper describes a technique known as discrete mode matching, which is suitable for the full-wave simulation of conformal microstrip structures. This contribution presents the theory behind this method, along with the analysis of microstrip lines and antennas conformed on cylindrical surfaces. The results have been compared with data obtained using other techniques and good agreement has been verified.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115103139","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637074
M. Havrilla, M. Hyde
A dual-probe rectangular waveguide material-parameter extraction technique capable of accommodating lowloss samples is presented. The technique's ability to easily measure reflection and transmission (R/T) coefficients necessary for simultaneous extraction of permittivity and permeability over all frequencies is discussed. Love's equivalence principle is used to create a system of coupled magnetic field integral equations (MFIEs) for the theoretical R/T coefficients which are subsequently solved using the Method of Moments (MoM). The material parameters are extracted via least squares by minimizing the magnitude of the difference of the theoretical and measured R/T coefficients. It is shown how the signal processing concept of time-domain gating can be utilized to mitigate edge diffraction effects of the finite waveguide flange. Material parameter extraction results, based on a single waveguide mode expansion, for various lossy and lowloss materials are provided to verify the technique.
{"title":"Dual-probe lowloss material extraction technique","authors":"M. Havrilla, M. Hyde","doi":"10.1109/URSI-EMTS.2010.5637074","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637074","url":null,"abstract":"A dual-probe rectangular waveguide material-parameter extraction technique capable of accommodating lowloss samples is presented. The technique's ability to easily measure reflection and transmission (R/T) coefficients necessary for simultaneous extraction of permittivity and permeability over all frequencies is discussed. Love's equivalence principle is used to create a system of coupled magnetic field integral equations (MFIEs) for the theoretical R/T coefficients which are subsequently solved using the Method of Moments (MoM). The material parameters are extracted via least squares by minimizing the magnitude of the difference of the theoretical and measured R/T coefficients. It is shown how the signal processing concept of time-domain gating can be utilized to mitigate edge diffraction effects of the finite waveguide flange. Material parameter extraction results, based on a single waveguide mode expansion, for various lossy and lowloss materials are provided to verify the technique.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115112372","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 : 2010-11-15DOI: 10.1109/URSI-EMTS.2010.5637068
E. Yiğit, S. Demirci, C. Ozdemir
This paper presents a brief overview on the imaging aspects of ground penetrating radar (GPR). Different experiments in three fields of investigation are conducted to demonstrate the feasibility of GPR for the imaging of subsurface materials. First, the GPR signatures of electrically and dimensionally different objects located inside the sand pool are obtained and processed into a focused image. The resulted image reveals that even the targets which have inherently low-level returns can be located by GPR. The second experiment is aimed to detect the water leaks from the plastic pipes via GPR technique. It is shown that additional water around the leak manifest itself as reflecting regions in the image, thereby giving information about the leak location. Furthermore, the GPR measurement of concrete column is performed to locate and image the stirrups within the columns. The results dictate the usability of GPR for concrete column analysis in measuring the position and size of stirrups.
{"title":"On the imaging applications of ground penetrating radar","authors":"E. Yiğit, S. Demirci, C. Ozdemir","doi":"10.1109/URSI-EMTS.2010.5637068","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637068","url":null,"abstract":"This paper presents a brief overview on the imaging aspects of ground penetrating radar (GPR). Different experiments in three fields of investigation are conducted to demonstrate the feasibility of GPR for the imaging of subsurface materials. First, the GPR signatures of electrically and dimensionally different objects located inside the sand pool are obtained and processed into a focused image. The resulted image reveals that even the targets which have inherently low-level returns can be located by GPR. The second experiment is aimed to detect the water leaks from the plastic pipes via GPR technique. It is shown that additional water around the leak manifest itself as reflecting regions in the image, thereby giving information about the leak location. Furthermore, the GPR measurement of concrete column is performed to locate and image the stirrups within the columns. The results dictate the usability of GPR for concrete column analysis in measuring the position and size of stirrups.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"826 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116142399","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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