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

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Flexible millimetre-wave frequency reconfigurable antenna for wearable applications in 5G networks 用于5G网络可穿戴应用的柔性毫米波频率可重构天线
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571536
S. F. Jilani, B. Greinke, Y. Hao, A. Alomainy
{"title":"Flexible millimetre-wave frequency reconfigurable antenna for wearable applications in 5G networks","authors":"S. F. Jilani, B. Greinke, Y. Hao, A. Alomainy","doi":"10.1109/URSI-EMTS.2016.7571536","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571536","url":null,"abstract":"In order to keep pace with the growing research and development on millimetre-wave (MMW) antennas for the fifth generation (5G) networks, this paper integrates the frequency reconfigurability in a flexible antenna operating at MMW frequency spectrum. The proposed antenna is designed on liquid crystal polymer (LCP) substrate which is currently well recognised for its distinguishing performance at high frequencies. Antenna geometry consists of a radiating patch like a shape of tuning fork and two stubs which can be made part of radiating element by means of two switches. The proposed antenna offers a frequency reconfiguration over an operational frequency range of 20.7-36 GHz by four different switch configurations. Surface mount PIN diodes have been assembled on LCP substrate as a switch. Inkjet printing has also been suggested for antenna fabrication. The proposed antenna is well suited for wearable communication systems and body-centric applications for future 5G networks because of its notable features of conformity, light-weight, high-efficiency, and frequency reconfigurability.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123582921","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: 26
Simulations and measurements of large phase progression in multi-layered metamaterials 多层超材料中大相进展的模拟与测量
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571470
A. Zaghloul, S. Weiss, T. Anthony
{"title":"Simulations and measurements of large phase progression in multi-layered metamaterials","authors":"A. Zaghloul, S. Weiss, T. Anthony","doi":"10.1109/URSI-EMTS.2016.7571470","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571470","url":null,"abstract":"Insertion phase in multi-layered metamaterials play an important role in understanding the constitutive parameters of the material. Simulations and measurements show the distinct large phase change across the frequency band in which the metamaterial exhibits special parameters. This paper addresses the phase behavior for materials that use loops or rings for magnetic properties and rods, wires, or probes for electric properties. Continuous wires and cut wires in the structure show different properties, especially in the frequency regions where negative refraction occurs. The conjecture that negative refraction is a manifestation of insertion phase variations is reiterated in this paper.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125345335","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
Enhancing the design of textile antennas with a polynomial chaos-based stochastic framework 基于多项式混沌的随机框架改进纺织天线的设计
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571443
Marco Rossi, S. Agneessens, D. Vande Ginste, H. Rogier
{"title":"Enhancing the design of textile antennas with a polynomial chaos-based stochastic framework","authors":"Marco Rossi, S. Agneessens, D. Vande Ginste, H. Rogier","doi":"10.1109/URSI-EMTS.2016.7571443","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571443","url":null,"abstract":"A stochastic framework is presented to enhance the design of textile antennas, by addressing the impact of production uncertainties, substrate bending and compression on the performance of textile antennas. Each effect is considered separately and the probability density functions corresponding to the design parameters undergoing variations are experimentally estimated. In order to accurately quantify the statistical distribution of the antenna's figures of merit corresponding to these variations, we introduce a stochastic collocation method based on a generalized polynomial chaos technique or on Padé approximants.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128169415","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
Sub-voxel refinement method for tissue boundary conductivities in volume conductor models 体积导体模型中组织边界电导率的亚体素细化方法
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571459
M. Mikkonen, I. Laakso
{"title":"Sub-voxel refinement method for tissue boundary conductivities in volume conductor models","authors":"M. Mikkonen, I. Laakso","doi":"10.1109/URSI-EMTS.2016.7571459","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571459","url":null,"abstract":"The resolution and element type of the mesh used in finite element method modelling of tDCS affect greatly on both the accuracy of the solution and computation time. Usually tetrahedral meshing is used in these models as they approximate curvature well but they are slow to solve. Using a voxel grid as the mesh reduces the computation time significantly but the cubical elements are not the most suitable option for curved surfaces. Tissue boundaries can be modelled as a layer of voxels with an average conductivity of the surrounding tissues. However, as the boundary being modelled only rarely divides a voxel into two equally sized portions, this approach is often erroneous. In particular with low resolutions. In this paper we propose a novel method for improving the accuracy of anatomically correct finite element method simulations by enhancing the tissue boundaries in voxel models. In our method, a voxel model is created from a set of polygonal surfaces segmented from MRI data by first voxelizing with a fine resolution and then increasing the voxel size to the target resolution and calculating the ratio of fine voxels in-and outside the surface within each coarse voxel. Thus a more accurate proportions for the volume of a coarse voxel inside and outside the tissue boundary is achieved and its conductivity can be better approximated. To test the performance of this method, a series of simulations of motor cortical tDCS were performed using resolutions from 0.2 mm to 2 mm scaled to 0, 2 or 4 times finer resolution. Based on the results, the voxel size can be doubled with a cost of 3% in relative error by using our method and thus the modelled DOFs can be decreased by 87% and the simulation times decreased by 82%.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"249 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132056644","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
High-frequency asymptotics for diffraction by a strongly elongated canonical object 强细长正则物体衍射的高频渐近性
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571313
I. Andronov, R. Mittra
{"title":"High-frequency asymptotics for diffraction by a strongly elongated canonical object","authors":"I. Andronov, R. Mittra","doi":"10.1109/URSI-EMTS.2016.7571313","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571313","url":null,"abstract":"An asymptotic approach to high-frequency diffraction which yields uniform approximations with respect to the rate of elongation of the body is discussed in this work. The method is restricted in its application to shapes that are rotationally symmetric and are well approximated by second-order curves. Diffraction by a strongly elongated spheroid is examined in more detail.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131235640","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 zero-reflection and zero-transmission of a stratified lossy medium 分层损耗介质的零反射和零透射
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571511
F. Mangini, F. Frezza
{"title":"On zero-reflection and zero-transmission of a stratified lossy medium","authors":"F. Mangini, F. Frezza","doi":"10.1109/URSI-EMTS.2016.7571511","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571511","url":null,"abstract":"In this paper a method to analyze the zero-reflection and zero-transmission conditions through a stratified lossy medium, is presented. The interaction of the electromagnetic radiation with the stratified material is taken into account by means of the transfer-matrix approach. The complex plane-wave propagation vectors are represented with the complex-angle formulation. In order to obtain these zero conditions an adaptive method has been adopted. A numerical code has been implemented to compute the field all-over the space. Some numerical applications, in order to obtain an electric matching layer for a large range of angles, are presented. This approach can be easily extended to an arbitrary number of layers to realize an intermediate layer with exotic properties.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133808489","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
Dynamics of interstellar dust particles in electromagnetic radiation fields 星际尘埃粒子在电磁辐射场中的动力学
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571366
Joonas Herranen, J. Markkanen, K. Muinonen
{"title":"Dynamics of interstellar dust particles in electromagnetic radiation fields","authors":"Joonas Herranen, J. Markkanen, K. Muinonen","doi":"10.1109/URSI-EMTS.2016.7571366","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571366","url":null,"abstract":"We establish a theoretical framework for solving the equations of motion for an arbitrarily shaped, isotropic, and homogeneous dust particle in the presence of radiation pressure. The scattering problem involved is solved by a surface integral equation method, and a rudimentary sketch of the numerical implementation is introduced with preliminary results agreeing with predictions.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126381317","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
The techniques for modeling the effects of high-frequency wave field strong scintillations on the transionospheric paths of propagation 高频波场强闪烁对跨层传播路径影响的模拟技术
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571320
N. Zernov, V. Gherm
{"title":"The techniques for modeling the effects of high-frequency wave field strong scintillations on the transionospheric paths of propagation","authors":"N. Zernov, V. Gherm","doi":"10.1109/URSI-EMTS.2016.7571320","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571320","url":null,"abstract":"The analytical technique and its numerical realizations are presented allowing for studying different regimes of the high frequency wave field strong scintillation, which may be formed when propagating in the stochastic transionospheric channel.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115521865","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
Scattering of lower order modes in a parallel plate waveguide loaded with a slightly deformed layer of conducting strips 加载微变形导电带层的平行板波导中低阶模式的散射
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571394
M. Norgren, Fatemeh Ghasemifard, M. Dalarsson
{"title":"Scattering of lower order modes in a parallel plate waveguide loaded with a slightly deformed layer of conducting strips","authors":"M. Norgren, Fatemeh Ghasemifard, M. Dalarsson","doi":"10.1109/URSI-EMTS.2016.7571394","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571394","url":null,"abstract":"The lower order modes are derived for a parallel plate waveguide loaded with a sheet of parallel conducting strips. Using a first order perturbation method, we derive the scattering parameters due to a small deformation of the sheet. Results for scattering within and between the novel slow mode and the ubiquitous TEM-mode are presented. With increasing angle between the strips and the direction of propagation, the interaction between the slow mode and the deformation shifts downwards in frequency, due to the reduced phase velocity.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134211704","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
Structuring band-pass dispersion with cascaded high- and low-pass optical metatronic metasurfaces 用级联高、低通光学变电子超表面构造带通色散
2016 URSI International Symposium on Electromagnetic Theory (EMTS) Pub Date : 2016-09-22 DOI: 10.1109/URSI-EMTS.2016.7571413
Yue Li, N. Engheta
{"title":"Structuring band-pass dispersion with cascaded high- and low-pass optical metatronic metasurfaces","authors":"Yue Li, N. Engheta","doi":"10.1109/URSI-EMTS.2016.7571413","DOIUrl":"https://doi.org/10.1109/URSI-EMTS.2016.7571413","url":null,"abstract":"In the paradigm of optical metatronics, metasurfaces with multi-layered structures can be engineered to behave as multi-ordered filters for desired spectral dispersions, such as low-pass, high-pass, band-pass, and band-stop cases, following and inspired by electronic circuit design procedures. However, there is a constraint in the design of layered band-pass metatronic filters with narrow bandwidth. Based on the concept of metatronic metasurfaces, a new method is proposed to achieve optical band-pass dispersion by cascading a pair of metatronic high-pass and low-pass metasurface filters. The proposed method is also numerically validated in the higher-ordered band-pass filter design with sharper transition slopes to the stopband. The results of our numerical simulations illustrate the possibility for such multi-ordered optical band-pass filters with narrow bandwidth, augmenting the procedures for dispersion engineering using layered metatronic metasurfaces.","PeriodicalId":400853,"journal":{"name":"2016 URSI International Symposium on Electromagnetic Theory (EMTS)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134046909","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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