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2010 URSI International Symposium on Electromagnetic Theory最新文献

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Phaseless retrieval of point-like scatterers: Theoretical foundation of the subspace method 点散射体的无相位检索:子空间法的理论基础
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637018
Xudong Chen
{"title":"Phaseless retrieval of point-like scatterers: Theoretical foundation of the subspace method","authors":"Xudong Chen","doi":"10.1109/URSI-EMTS.2010.5637018","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637018","url":null,"abstract":"This paper investigates the theoretical foundation of subspace based method for solving electromagnetic inverse scattering problem of locating point-like scatterers and retrieving their polarization tensors, using phaseless scattering data. The key step is to prove the injectivity of a coefficient-to-intensity mapping operator. As corollaries, the multiple-signal-classification method can be used to locate point-like scatterers, and polarization tensors can be non-iteratively retrieved. This paper provides the theoretical foundation to recently published phaseless retrieval work. Finally, the advantage and disadvantage of the subspace method are discussed.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"310 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":"124473013","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
An approach for solving the time domain electric field integral equation (TD-EFIE) utilizing a novel basis function 利用一种新的基函数求解时域电场积分方程的方法
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637059
J. Bringuier, R. Mittra
{"title":"An approach for solving the time domain electric field integral equation (TD-EFIE) utilizing a novel basis function","authors":"J. Bringuier, R. Mittra","doi":"10.1109/URSI-EMTS.2010.5637059","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637059","url":null,"abstract":"In this paper we present a novel technique for solving the time domain electric field integral equation (TD-EFIE). This approach is based on a new choice for the basis functions in the time domain that have closed-form representations and are causal.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"14 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":"125956559","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
Microwave breast imaging by the filtered forward-backward time-stepping method 微波乳腺成像的滤波正反向时间步进方法
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637368
T. Takenaka, T. Moriyama, K. H. Hong Ping, Takafumi Yamasaki
{"title":"Microwave breast imaging by the filtered forward-backward time-stepping method","authors":"T. Takenaka, T. Moriyama, K. H. Hong Ping, Takafumi Yamasaki","doi":"10.1109/URSI-EMTS.2010.5637368","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637368","url":null,"abstract":"In this paper, an inverse scattering technique referred to as the filtered forward-backward time-stepping method is applied to microwave imaging for breast cancer detection. A two-dimensional numerical breast phantom (derived from MR images) with high contrast between fat and fibroglandular tissues, and low contrast between fibroglandular and tumor tissues are used to assess the efficacy of the proposed method.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"51 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":"127336805","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: 12
Efficient calculation of 1-D periodic Green's functions for leaky-wave applications 漏波应用中一维周期格林函数的高效计算
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637089
S. Paulotto, G. Valério, D. Jackson, D. Wilton, P. Baccarelli, F. T. Celepcikay, W. Johnson, A. Galli
{"title":"Efficient calculation of 1-D periodic Green's functions for leaky-wave applications","authors":"S. Paulotto, G. Valério, D. Jackson, D. Wilton, P. Baccarelli, F. T. Celepcikay, W. Johnson, A. Galli","doi":"10.1109/URSI-EMTS.2010.5637089","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637089","url":null,"abstract":"In this paper an approach is described for the efficient computation of the mixed-potential scalar and dyadic Green's functions for a one-dimensional periodic (periodic along x direction) array of point sources embedded in a planar stratified structure. Suitable asymptotic extractions are performed on the slowly converging spectral series. The extracted terms are summed back through the Ewald method, modified and optimized to efficiently deal with all the different terms. The accelerated Green's functions allow for complex wavenumbers, and are thus suitable for application to leaky-wave antennas analysis. Suitable choices of the spectral integration paths are made in order to account for leakage effects and the proper/improper nature of the various space harmonics that form the 1-D periodic Green's function.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"4 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":"127971309","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: 8
Energy vs. group velocity for elastic waves in homogeneous anisotropic solid media 均匀各向异性固体介质中弹性波的能量与群速度
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637253
K. Langenberg, R. Marklein, K. Mayer
{"title":"Energy vs. group velocity for elastic waves in homogeneous anisotropic solid media","authors":"K. Langenberg, R. Marklein, K. Mayer","doi":"10.1109/URSI-EMTS.2010.5637253","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637253","url":null,"abstract":"As for electromagnetic waves the energy velocity for time harmonic elastic waves is defined by the ratio of the (real part) of the elastodynamic complex Poynting vector and their time-averaged elastic energy density. For time harmonic plane waves in homogeneous anisotropic materials an explicit analytic expression can be derived involving the phase propagation vector and the eigenvectors (polarizations) of the respective wave modes (quasi-pressure, quasi-shear). Numerical evaluation yields plane wave energy velocity diagrams for these wave modes that depend on the direction of the phase vector. On the other hand, for impulsive elastic wave packets a group velocity can be defined under certain assumptions as the gradient in phase space of the dispersion relation. As will be shown in the paper, if definable, the group velocity can be alternatively computed by the expression for the energy velocity. This is particularly interesting because frequency band-limited impulsive elastic waves emanating from point sources (band-limited time domain Green functions, Huygens elementary elastic wave packets) exhibit a spatial structure identical to plane wave energy velocity diagrams giving rise to their calculation without the explicit knowledge of the pertinent Green functions. Therefore, time harmonic plane waves serve as a computational tool for impulsive point source excited waves that has consequences for elastic wave diffraction tomographic imaging.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"42 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":"126845786","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: 6
Characterization of composite materials in waveguides 波导中复合材料的表征
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637156
D. Sjoberg, C. Larsson
{"title":"Characterization of composite materials in waveguides","authors":"D. Sjoberg, C. Larsson","doi":"10.1109/URSI-EMTS.2010.5637156","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637156","url":null,"abstract":"The effective properties of a composite material can be predicted using homogenization techniques. In order to verify these predictions, it is common to extract material data from a scattering experiment, where the primary data extracted are wave parameters such as wave number and wave impedance. Using Cramér-Rao lower bounds, we show that in a waveguide setting the wave impedance is ill-determined at resonance and the wave number is well-determined, but both permittivity and permeability are ill-determined. We also show that a priori knowledge is essential in order to extract anisotropic material data.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"70 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":"123148065","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
A simulation model for wideband MIMO vehicle-to-vehicle fading channels in T-junction propagation environments t型交叉口传播环境下宽带MIMO车对车衰落信道仿真模型
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637080
Zhou Wei, M. Patzold, Chen Wei, He Zhiyi
{"title":"A simulation model for wideband MIMO vehicle-to-vehicle fading channels in T-junction propagation environments","authors":"Zhou Wei, M. Patzold, Chen Wei, He Zhiyi","doi":"10.1109/URSI-EMTS.2010.5637080","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637080","url":null,"abstract":"In this paper, we propose a high-performance simulation model for wideband multiple-input multiple-output (MIMO) vehicle-to-vehicle (V2V) fading channels in T-junction propagation environments. The so-called Riemann sum method (RSM) is applied for the parametrisation of the simulation model. Furthermore, the statistical properties of the wideband MIMO V2V channel simulation model, such as the space-time-frequency cross-correlation function (STF-CCF), the two-dimensional spatial cross-correlation function (2D spatial CCF) and the temporal auto-correlation function (ACF) are studied. Finally, the high accuracy of the proposed simulation model is demonstrated by comparing the correlation properties of the simulation model with those of the underlying reference model. This research work is important for designers of MIMO V2V communication systems as the proposed simulation tool allows the analysis, optimization, and test of high data rate transmission schemes under realistic T-junction scattering conditions.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"210 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":"123039343","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
Analysis of the UWB antennas angular dependent radiation of impulse signals 超宽带天线脉冲信号的角相关辐射分析
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637446
E. Pancera, J. Fortuny-Guasch, W. Wiesbeck
{"title":"Analysis of the UWB antennas angular dependent radiation of impulse signals","authors":"E. Pancera, J. Fortuny-Guasch, W. Wiesbeck","doi":"10.1109/URSI-EMTS.2010.5637446","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637446","url":null,"abstract":"In this paper an analysis of the time domain angular dependent behavior and distortion of UWB antennas on the radiated pulse is presented. In particular, the variation of the time domain parameters in the different angular directions is investigated and quantified using the distortion parameter as a figure of merit.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"17 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":"123107688","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
Smart Antennas in aerospace applications 航空航天应用中的智能天线
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637077
J. Verpoorte, H. Schippers, C. Roeloffzen, D. Marpaung
{"title":"Smart Antennas in aerospace applications","authors":"J. Verpoorte, H. Schippers, C. Roeloffzen, D. Marpaung","doi":"10.1109/URSI-EMTS.2010.5637077","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637077","url":null,"abstract":"The interest in Smart Antennas for aerospace applications is growing. This paper describes smart antennas which can be used on aircraft. Two aerospace applications are discussed in more detail: a phased array antenna with optical beam forming and a large vibrating phased array antenna with electronic compensation techniques.","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":"122203202","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
On the numerical evaluation of the testing integrals for the Galerkin discretization of surface integral equations 曲面积分方程Galerkin离散化测试积分的数值计算
2010 URSI International Symposium on Electromagnetic Theory Pub Date : 2010-11-15 DOI: 10.1109/URSI-EMTS.2010.5637093
G. Lombardi, R. Graglia, M. Bercigli, R. Guidi
{"title":"On the numerical evaluation of the testing integrals for the Galerkin discretization of surface integral equations","authors":"G. Lombardi, R. Graglia, M. Bercigli, R. Guidi","doi":"10.1109/URSI-EMTS.2010.5637093","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2010.5637093","url":null,"abstract":"The testing integrals used to discretize surface integral equations by application of the Moment Method are usually considered as regular ‘trivial’ integrals to be computed. This paper discusses some fundamental problems relevant to the numerical evaluation of these integrals and presents several test cases.","PeriodicalId":404116,"journal":{"name":"2010 URSI International Symposium on Electromagnetic Theory","volume":"31 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":"122226367","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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