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2016 URSI International Symposium on Electromagnetic Theory (EMTS)最新文献

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Comparison of potential-based analysis methods for simple and complex media 简单介质和复杂介质基于电位分析方法的比较
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571392
M. Havrilla
{"title":"Comparison of potential-based analysis methods for simple and complex media","authors":"M. Havrilla","doi":"10.1109/URSI-EMTS.2016.7571392","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571392","url":null,"abstract":"A comparison of vector and scalar potential formulations for simple and complex media is presented. Boundary conditions for the various formulations are provided, including new scalar potential boundary conditions valid for layered bianisotropic gyrotropic media. Advantages and limitations of each technique are discussed in order to identify the most suitable method of analysis for a given class of material.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121564596","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
Multiple scattering by dense random media: Volume-element extinction 密集随机介质的多重散射:体元消光
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571510
K. Muinonen, J. Markkanen, A. Virkki, A. Penttila, D. Mackowski
{"title":"Multiple scattering by dense random media: Volume-element extinction","authors":"K. Muinonen, J. Markkanen, A. Virkki, A. Penttila, D. Mackowski","doi":"10.1109/URSI-EMTS.2016.7571510","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571510","url":null,"abstract":"We consider multiple scattering of electromagnetic waves in dense discrete random media of particles. Here we focus on the exact computation of the coherent and incoherent scattered far fields for finite volume elements of spherical particles. We solve the scattering problem with the Superposition T-matrix method. We derive the incoherent extinction coefficient and, subsequently, the extinction mean-free-path length for volume elements with varying numbers of spherical particles as well as varying volume fractions of particles. In addition to confirming known results for incoherent scattering, we show new results, in particular, for the polarization effects in incoherent scattering.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128032693","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
Some new techniques for evaluating Sommerfeld integrals for microstrip antenna analysis 微带天线分析中索默菲尔德积分的几种新方法
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571390
Deb Chatterjee, Sadasiva M. Rao, M. Kluskens
{"title":"Some new techniques for evaluating Sommerfeld integrals for microstrip antenna analysis","authors":"Deb Chatterjee, Sadasiva M. Rao, M. Kluskens","doi":"10.1109/URSI-EMTS.2016.7571390","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571390","url":null,"abstract":"A new transformation for evaluating Sommerfeld integrals is derived here when the path is deformed in the upper half of the complex plane. This transformation has the feature that as the lateral separation ρ → ∞, the argument of the Bessel function diminishes. It is argued that this approach shall facilitate much efficient calculation of Sommerfeld integrals.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125008964","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
Transfer operator approach for cavities with apertures 带孔洞的转移算子方法
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571490
G. Gradoni, S. Creagh, G. Tanner
{"title":"Transfer operator approach for cavities with apertures","authors":"G. Gradoni, S. Creagh, G. Tanner","doi":"10.1109/URSI-EMTS.2016.7571490","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571490","url":null,"abstract":"We describe a representation of the boundary integral equations for wave propagation in enclosures which leads to a direct description of transport and dynamical characteristics of the problem. The formalism is extended to account for arbitrary and possibly statistical sources driving a polygonal cavity problem and to account for apertures. In this approach, the boundary integral equations are encoded within a shift operator which propagates waves leaving the boundary until they return to the boundary as an incoming wave. The response of the system to non-deterministic, statistical sources characterised by correlation functions can be treated, providing a direct path to ray-tracing approaches through the Wigner function. The high frequency limit is retrieved semiclassically and provides a simple ray tracing scheme transporting densities of rays as an averaged response. Interference effects due to transport along multiple paths can also be accounted for.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123810523","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
Spatio-temporal imaging of light transport in strongly scattering media 强散射介质中光传输的时空成像
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571372
A. Badon, Dayan Li, G. Lerosey, C. Boccara, M. Fink, A. Aubry
{"title":"Spatio-temporal imaging of light transport in strongly scattering media","authors":"A. Badon, Dayan Li, G. Lerosey, C. Boccara, M. Fink, A. Aubry","doi":"10.1109/URSI-EMTS.2016.7571372","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571372","url":null,"abstract":"We report on the passive measurement of time-dependent Green's functions in the optical frequency domain with low-coherence interferometry. Inspired by previous studies in acoustics and seismology, we show how the mutual coherence function of a broadband and incoherent wave-field can directly yield the Green's functions between scatterers of a complex medium. Both the ballistic and multiple scattering components of the Green's function are retrieved. This simple and powerful approach directly yields a wealth of information about the medium under investigation. In particular, it allows to investigate locally the growth of the diffusive halo within the scattering medium. Local measurements of transport parameters can thus be performed and allow to image a strongly scattering layer with a unprecedented resolution of a few transport mean free paths. This constitutes a major breakthrough compared to state-of-the-art techniques such as optical diffuse tomography.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123899538","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
Flat transformation optics 平面变换光学
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571469
M. Mencagli, E. Martini, S. Maci
{"title":"Flat transformation optics","authors":"M. Mencagli, E. Martini, S. Maci","doi":"10.1109/URSI-EMTS.2016.7571469","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571469","url":null,"abstract":"This paper presents an approach for the analysis of surface-wave (SW) propagation on modulated surface impedance described through a 2-D coordinate transformation. This approach is based on an extension of geometrical optics (GO) description for plane waves in graded index materials to SWs supported by modulated, impenetrable isotropic or anisotropic impedance boundary conditions. In particular, it extends to SWs the basic concepts of GO (ray-path, ray-velocity, transport of energy), thus, resulting in an elegant formulation which allows for close-form analysis of planar operational devices. Furthermore, being the modulated surface impedance based on 2-D coordinate mapping, it allows one to determine ray path without resorting to ray tracing.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129490012","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
Broadband metasurface for surface wave lenses 面波透镜的宽带超表面
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571467
R. C. Mitchell-Thomas, I. Hooper, J. Sambles, A. Hibbins, O. Quevedo–Teruel
{"title":"Broadband metasurface for surface wave lenses","authors":"R. C. Mitchell-Thomas, I. Hooper, J. Sambles, A. Hibbins, O. Quevedo–Teruel","doi":"10.1109/URSI-EMTS.2016.7571467","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571467","url":null,"abstract":"This paper presents the design of a metasurface that exhibits glide symmetry. This allows the metasurface to support a mode that is confined to the surface for a broad band of frequencies. In addition it is shown that the mode index of such surfaces depends only weakly on the frequency over a given range. We then propose these structures as a practical solution to the fabrication of broadband surface-wave lenses designed using quasi-conformal transformation optics technique.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124969760","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: 4
Linear antenna synthesis with maximum directivity using improved fruit fly optimization algorithm 基于改进果蝇优化算法的最大指向性线性天线综合
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571494
Nattaset Mhudtongon, C. Phongcharoenpanich, Koki Watanabe
{"title":"Linear antenna synthesis with maximum directivity using improved fruit fly optimization algorithm","authors":"Nattaset Mhudtongon, C. Phongcharoenpanich, Koki Watanabe","doi":"10.1109/URSI-EMTS.2016.7571494","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571494","url":null,"abstract":"Linear antenna array synthesis with maximum directivity using an improved fruit fly optimization algorithm with adaptive fruit fly swarm population size, namely IMFOA, is presented in this paper. The IMFOA is a recently explored, high-performance algorithm, and suitable for solving the optimization problems. To show the versatility of the presented method, the objective of antenna design is to achieve maximum directivity for linear antenna array by controlling amplitude and spacing parameters of the array antenna. A design example is presented that illustrate the use of the IMFOA, and the optimization goal in example is accurately provided and easily achieved. The result of the IMFOA is validated by comparing with results obtained using the MFOA method, and GA/Fminsearch method. Finally, the IMFOA method is efficient and accurate for electromagnetic problems of the linear antenna array in free space.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130192935","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
Web-based application to obtain the propagation in outdoor environments importing data from OpenStreetMaps 基于web的应用程序，从OpenStreetMaps导入数据，以获得在室外环境中的传播
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571415
Josefa Gómez, A. Tayebi, O. Gutiérrez, Maria Angeles Fernandez de Sevilla, F. Saez de Adana
{"title":"Web-based application to obtain the propagation in outdoor environments importing data from OpenStreetMaps","authors":"Josefa Gómez, A. Tayebi, O. Gutiérrez, Maria Angeles Fernandez de Sevilla, F. Saez de Adana","doi":"10.1109/URSI-EMTS.2016.7571415","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571415","url":null,"abstract":"The implementation of a web-based application to obtain the propagation in outdoor environments is presented in this paper. The tool provides the results of an empirical formulation in a friendly user interface. The main advantage of the proposed system is that the data of the environment are obtained from OpenStreetMaps allowing the calculation at any part of the world with an easy accessibility to the required data. Moreover, the formulation is applicable to rural and urban environments. The web application has been implemented using HTML5 and CSS3. The open source JavaScript library Leaflet has been used to include interactive maps.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122352476","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
A combined approach for shape reconstruction from under-sampled data 欠采样数据形状重建的组合方法
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-08-01 DOI: 10.1109/URSI-EMTS.2016.7571297
A. Dell’Aversano, G. Leone, R. Solimene
{"title":"A combined approach for shape reconstruction from under-sampled data","authors":"A. Dell’Aversano, G. Leone, R. Solimene","doi":"10.1109/URSI-EMTS.2016.7571297","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571297","url":null,"abstract":"A combined Migration-MUSIC approach is adopted to deal with the inverse problem of reconstructing the shape of strong scatterers composed of elementary shapes and embedded within an electrically large investigation domain from under-sampled backscattered field data. The scatterers are deployed over a metallic plane, which mimics the ground floor, as in SAR scenarios. In order to mitigate aliasing, migration images obtained by using disjoint available frequency bands are combined in an interferometric way. Next as each elementary shape is characterized by a small amount of parameters, a MUSIC algorithm is employed to reconstruct them separately.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121434353","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
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