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

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Effect of shape deformation of a patch antenna on its characteristic modes 贴片天线形状变形对其特征模态的影响
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571492
M. Honkala, A. Lehtovuori, Elias Raninen, P. Yla-Oijala
{"title":"Effect of shape deformation of a patch antenna on its characteristic modes","authors":"M. Honkala, A. Lehtovuori, Elias Raninen, P. Yla-Oijala","doi":"10.1109/URSI-EMTS.2016.7571492","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571492","url":null,"abstract":"This paper studies how deforming the shape of a patch antenna affects its characteristic modes by applying the characteristic modes theory to analyze EM fields in antenna designs. The resonant frequencies of the lowest modes are in special focus in order to excite several modes in as small a space as possible.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114097837","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 spectrum and preconditioning of electromagnetic volume integral equations 电磁体积积分方程的谱与预处理
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571533
J. Markkanen, P. Yla-Oijala, S. Jarvenpaa
{"title":"On the spectrum and preconditioning of electromagnetic volume integral equations","authors":"J. Markkanen, P. Yla-Oijala, S. Jarvenpaa","doi":"10.1109/URSI-EMTS.2016.7571533","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571533","url":null,"abstract":"Spectral properties of current-based volume integral equation of electromagnetic scattering are investigated in the case of isotropic and bi-isotropic objects. Using Helmholtz decomposition the spectrum is derived separately for the solenoidal, irrotational, and harmonic subspaces. Based on this analysis, preconditioning strategies of the matrix equation are discussed.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"954 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114540480","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
Scattering analysis of asymmetric metamaterial resonators by the Riemann-Hilbert approach 用黎曼-希尔伯特方法分析非对称超材料谐振腔的散射
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571384
Piotr M. Kamiński, R. Ziolkowski, S. Arslanagić
{"title":"Scattering analysis of asymmetric metamaterial resonators by the Riemann-Hilbert approach","authors":"Piotr M. Kamiński, R. Ziolkowski, S. Arslanagić","doi":"10.1109/URSI-EMTS.2016.7571384","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571384","url":null,"abstract":"This work presents an analytical treatment of an asymmetric metamaterial-based resonator excited by an electric line source, and explores its beam shaping capabilities. The resonator consists of two concentric cylindrical material layers covered with an infinitely thin conducting shell with an aperture. Exact analytical solution of the problem is derived; it is based on the n-series approach which is casted into the equivalent Riemann-Hilbert problem. The examined configuration leads to large enhancements of the radiated field and to steerable Huygens-like directivity patterns. Particularly, the directivities can be reshaped by changing the source location, as well as the extent of the aperture. The present results may provide alternative strategies for beam shaping and may contribute to development of novel nano-antenna designs.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121464684","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
On multi-dimensional systems; properties of their transfer functions 关于多维系统;它们的传递函数的性质
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571440
B. Jonsson, M. Gustafsson
{"title":"On multi-dimensional systems; properties of their transfer functions","authors":"B. Jonsson, M. Gustafsson","doi":"10.1109/URSI-EMTS.2016.7571440","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571440","url":null,"abstract":"A range of interesting electromagnetic systems like antennas, extraordinary transmission and absorbers have been shown to have certain bandwidth limitations given by a family of sum-rules. Common for the systems are that they are passive, linear and time-translational invariant. In this paper we shortly review the extension from one-dimensional passive systems to multi-dimensional systems, aiming towards constraining the system properties. The most well-known case of system constraints follows from multi-dimensional passivity, where a Schwartz-kernel representation theorem maps Borel-measures with a growth condition to the (complexified) Fourier transform of the transfer function. A weaker form of system constraints follow from generalizations of Kramers-Kronig relations. One such approach is a generalized Cauchy-Bochner representations, under Sobolev space limitations on the transform pair. This approach is closely connected to that the support of the transfer function is within an acute cone. Another approach to system transfer constraints is the multi-dimensional Hilbert-transform, often with square-integrable function requirements. It is observed that the Cauchy-Bochner representation and the multi-dimensional Hilbert transform yield different representations in higher dimensions although they give the same in one dimension. We end the paper with a few explicit examples of functions that satisfy the constraints.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133346187","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
Analytical investigations of ground modifications assisting the detection of a buried object 协助探测被埋物体的地面变化的分析调查
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571519
C. Valagiannopoulos, N. Tsitsas, A. Sihvola
{"title":"Analytical investigations of ground modifications assisting the detection of a buried object","authors":"C. Valagiannopoulos, N. Tsitsas, A. Sihvola","doi":"10.1109/URSI-EMTS.2016.7571519","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571519","url":null,"abstract":"A ground-penetrating radar (GPR) antenna excites a perfectly electric conducting inclusion buried inside the ground. The scattering problem is solved semi-analytically via integral equation techniques. The permittivity and thickness of a superstrate deposited atop the ground are determined such that the detectability of the inclusion is significantly increased. Results from numerical simulations are presented exhibiting the effectiveness of the approach. Emphasis is given on the effects that the shape of the buried inclusion has on the scattered field.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129170846","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
Teaching experiment in Aalto University: Progressive inquiry, reverse engineering, and company collaboration in a hands-on antenna course 阿尔托大学的教学实验:天线实践课程中的渐进式探究、逆向工程和公司合作
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571434
J. Holopainen, D. Tzarouchis
{"title":"Teaching experiment in Aalto University: Progressive inquiry, reverse engineering, and company collaboration in a hands-on antenna course","authors":"J. Holopainen, D. Tzarouchis","doi":"10.1109/URSI-EMTS.2016.7571434","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571434","url":null,"abstract":"We describe a teaching experiment conducted in a hands-on antenna course in Aalto University. The course was specifically designed to fulfill the higher level (senior master's and post-graduate) educational objectives and it was implemented by applying the principles of the “progressive inquiry” model. The model was introduced and applied in two practical assignments, giving special emphasis on skills such as group cooperation and expertise development within realistic scenes, i.e., reverse engineering and collaboration with a company.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124608684","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 power transfer through a metallic wire medium slab 宽带电力传输通过金属线介质板
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571463
S. Kosulnikov, D. Vovchuk, I. Nefedov, S. Tretyakov, C. Simovski
{"title":"Broadband power transfer through a metallic wire medium slab","authors":"S. Kosulnikov, D. Vovchuk, I. Nefedov, S. Tretyakov, C. Simovski","doi":"10.1109/URSI-EMTS.2016.7571463","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571463","url":null,"abstract":"The work contains an experimental confirmation and a theoretical study of broadband power transfer in wire medium slabs. The motivation of this work is a set of novel thermophotovoltaic devices suggested earlier. The key element of these devices is a wire medium slab which electromagnetically connects hot and cold parts without touching them due to a small gap between the ends of the wires and these parts of the system. The electromagnetic connection implies radiative heat transfer. This transfer presumably holds in a very wide band of infrared frequencies. However, this theory was never confirmed experimentally. Even the conceptual possibility of broadband electromagnetic power transfer through a wire medium layer was obtained only in numerical simulations. In the present work, the authors propose a test-bed system, qualitatively mimicking the radiation by a thermal emitter in the radio frequency range. The thermal emitter is replaced by an input waveguide and the photovoltaic (cold) part - by an output waveguide. They are separated by a substantial air gap in which an array of parallel wires is introduced, not touching the waveguide walls.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125269013","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
Magnetoelectric coupling without electric and magnetic response? 没有电和磁响应的磁电耦合?
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571356
M. Albooyeh, S. Hashemi, V. Asadchy, R. Alaee, M. Yazdi, M. Mirmoosa, C. Rockstuhl, C. Simovski, S. Tretyakov
{"title":"Magnetoelectric coupling without electric and magnetic response?","authors":"M. Albooyeh, S. Hashemi, V. Asadchy, R. Alaee, M. Yazdi, M. Mirmoosa, C. Rockstuhl, C. Simovski, S. Tretyakov","doi":"10.1109/URSI-EMTS.2016.7571356","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571356","url":null,"abstract":"We theoretically consider electrically small reciprocal particles, which show bianisotropic magneto-electric coupling. We study how strong the magneto-electric effect can be in comparison with the electric and magnetic polarizations induced directly by the corresponding electric and magnetic incident fields. In particular, we prove that it is not possible to realize a passive reciprocal particle, which would have exactly zero electric or magnetic polarizability but still exhibit magneto-electric coupling effects. On the other hand, we prove that magnetoelectric coupling coefficient can be very large as compared to both electric and magnetic polarizabilities of the same particle, in contrast to some claims found in the literature.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123250153","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 issue of simulating very large endfire arrays with complex antenna geometries 关于模拟具有复杂天线几何形状的超大型末射阵列的问题
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571506
Jakob Helander, D. Sjoberg, D. Tayli
{"title":"On the issue of simulating very large endfire arrays with complex antenna geometries","authors":"Jakob Helander, D. Sjoberg, D. Tayli","doi":"10.1109/URSI-EMTS.2016.7571506","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571506","url":null,"abstract":"This paper discusses some of the main issues of efficient analysis of electrically very large endfire arrays, and further proposes approaches for developing flexible simulation tools for this particular purpose. Some initial results supporting the endfire array design issue are presented, as well as some preliminary examples of implemented compression- and acceleration methods.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127228328","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
Dual topological transition in polaritonic wire media and its radiative implications 极化线介质的双拓扑跃迁及其辐射意义
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-19 DOI: 10.1109/URSI-EMTS.2016.7571306
M. Mirmoosa, S. Kosulnikov, C. Simovski
{"title":"Dual topological transition in polaritonic wire media and its radiative implications","authors":"M. Mirmoosa, S. Kosulnikov, C. Simovski","doi":"10.1109/URSI-EMTS.2016.7571306","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571306","url":null,"abstract":"Here, theoretically we uncover two topological transitions of the wave dispersion at midinfrared frequencies in a wire medium formed by lithium tantalate nanowires. We show while one transition is fixed at one certain frequency, the other transition happening at lower frequency can be blue shifted which enables to achieve a broadband enhancement of emission for an infrared emitter embedded into the medium.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123506266","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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