2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)最新文献

{"title":"Uncertainty propagation in phaseless electric properties tomography","authors":"A. Arduino, O. Bottauscio, M. Chiampi, L. Zilberti","doi":"10.1109/ICEAA.2019.8879147","DOIUrl":"https://doi.org/10.1109/ICEAA.2019.8879147","url":null,"abstract":"Uncertainty propagation in a phaseless magnetic resonance-based electric properties tomography technique is investigated using the Monte Carlo method. The studied inverse method, which recovers the electric properties distribution at radiofrequency inside a scatterer irradiated by the coils of a magnetic resonance imaging scanner, is based on the contrast source inversion technique adapted to process phaseless input data.","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127852898","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}

{"title":"Improved permittivity and permeability measurement in open or short circuit terminated test fixtures","authors":"S. Pennock","doi":"10.1109/ICEAA.2019.8879046","DOIUrl":"https://doi.org/10.1109/ICEAA.2019.8879046","url":null,"abstract":"The unknown permittivity and permeability of a material often needs to be measured. Many techniques use two or more samples or configurations in order to provide sufficient data to determine the permittivity and permeability, under teh assumption that the two samples have identical permittivity and permeability. This paper investigates a technique where sufficient data is determined from a single measure of a single sample by examining the first and second derivatives with respect to frequency of the measured data. The scheme is seen to converge with well with 201 data points in the frequency measure fro a sample that is 65 mm in length. The accuracy of the calculated permittivity and permeability is seen to be very good where there is no dispersion present, and still tolerable where there is some dispersion in the permittivity and permeability of the sample.","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114917105","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}

{"title":"Characterization of mm-Wave Conformal Antenna Arrays for a $3times 8$ MIMO Radar","authors":"C. Vasanelli, Benedikt Meinecke, Jonathan Mayer, O. Elsayad, Philipp Hügler, Fabian Roos, T. Zwick, C. Waldschmidt","doi":"10.1109/ICEAA.2019.8878980","DOIUrl":"https://doi.org/10.1109/ICEAA.2019.8878980","url":null,"abstract":"In a number of applications millimeter-wave multiple-input multiple-output (MIMO) radars are widely employed. The use of conformal antenna arrays has been recently proposed to improve the radar sensor performance. This paper presents an optimization algorithm for finding the antenna placement in a non-planar arrangement. The experimental characterization of two prototypes based on radar measurements with an experimental $3times 8$ MIMO radar sensor confirms the results predicted by the numerical simulations. The direction of arrival estimation has been performed successfully, and the measured beampatterns are in very good agreement with the simulated ones.","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127403682","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}

{"title":"UWB stripline coupler with low loss and ripple","authors":"Ali Agharasuli, Mehdi Karimi Mehr, O. Manoochehri, D. Erricolo","doi":"10.1109/ICEAA.2019.8878912","DOIUrl":"https://doi.org/10.1109/ICEAA.2019.8878912","url":null,"abstract":"An asymmetric multi-section ultra-wide band stripline coupler with two coupled parallel stripline is proposed. The primary features of the coupler include operating frequency from 2 GHz to 18 GHz to cover S, C, X, Ka and Ku bands; coupling coefficient below −18 dB; return loss of −20 dB for all the ports; minimum directivity of 25 dB; small size and low losses, which make it appropriate for applications, where the available space is limited. The coupler parameter values are obtained after a two step optimization process using i) a genetic algorithm with Matlab; and, ii) a particle swarm algorithm with HFSS software. The whole structure is simulated, fabricated and measured. There is an excellent agreement between measured and simulated results.","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134645580","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}

{"title":"A Review of 3-D Green's Functions for Integral Equation Modeling of Electromagnetic Scattering from 1/2/3-D Periodic Structures Using Ewald Transformation","authors":"I. Stevanovic, Aleksandar Terzic, P. Crespo‐Valero","doi":"10.1109/ICEAA.2019.8879421","DOIUrl":"https://doi.org/10.1109/ICEAA.2019.8879421","url":null,"abstract":"This paper reviews 3-D Green's functions (GFs) used in numerical modeling of electromagnetic scattering from periodic structures and presents a consolidated formulation for 1-D, 2-D, and 3-D lattices obtained using Ewald transformation. It includes formulas for the transformed periodic GF sums and their gradient, the expressions for the Ewald splitting parameter, and the singularity extraction. Numerical implementation details that lead to further enhancements in computational speed, accuracy, and numerical stability are also presented.","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115243293","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}

{"title":"Anapoles and Flying Doughnuts","authors":"N. Papasimakis, V. Savinov, A. Zdagkas, N. Zheludev","doi":"10.1109/ICEAA.2019.8879277","DOIUrl":"https://doi.org/10.1109/ICEAA.2019.8879277","url":null,"abstract":"Toroidal excitations can exist both in matter, as represented by the toroidal multipoles, as well as in free-space in the form of “Flying Doughnuts” [1]. Toroidal multipoles provide significant contributions to the electromagnetic response of matter and together with the conventional electric and magnetic multipoles can lead to non-radiating configurations, termed anapoles. Indeed, anapoles can be formed by a superposition of an electric dipole and a toroidal dipole, which, owing to their identical radiation properties, allow for complete cancellation of radiated electromagnetic fields outside the source. However, although anapoles do not radiate electromagnetic fields, they do act as sources of vector potential (which cannot be eliminated by a change of gauge). On the other hand, Flying Doughnuts are few-cycle electromagnetic pulses with non-trivial spatiotemporal coupling and toroidal configuration of electromagnetic fields that propagate in free-space at the speed of light. They are exact solutions to Maxwell's equations and exhibit strong longitudinal field components along the propagation direction. The spatial and temporal dependence of the Flying Doughnut pulse cannot be separated from one another, which results in a spatially varying frequency spectrum. In particular, the Flying Doughnut pulse exhibits a frequency spectrum that varies across the wavefront with shorter wavelengths localized closer to the center of the pulse and longer wavelengths dominating the outer regions of the pulse. Importantly, this spatial variation remains invariant upon propagation of the pulse, as well as focusing and defocusing, indicating that the Flying Doughnut pulse is isodiffracting. This spatiotemporal coupling in combination with the doughnut-like arrangement of electromagnetic fields, leads to a complex topological structure in the form of spectrally broadband vortices with multiple singularities in both the electric and magnetic fields. Flying Doughnut pulses can interact with matter in unique ways, which result in non-trivial field transformations upon reflection from perfectly conducting and dielectric interfaces. Moreover, the interactions of Flying Doughnut pulses with spherical dielectric particles can lead to the excitation of toroidal resonances and non-radiating configurations (anapoles).","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133727342","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}

{"title":"Machine Learning in Electromagnetics: A Review and Some Perspectives for Future Research","authors":"D. Erricolo, Pai-Yen Chen, Anastasiia Rozhkova, Elahehsadat Torabi, H. Bağcı, A. Shamim, Xiangliang Zhang","doi":"10.1109/ICEAA.2019.8879110","DOIUrl":"https://doi.org/10.1109/ICEAA.2019.8879110","url":null,"abstract":"We review machine learning and its applications in a wide range of electromagnetic problems, including radar, communication, imaging and sensing. We extensively discuss some recent progress in development and use of intelligent algorithms for antenna design, synthesis, and characterization. We also provide some perspectives for future research directions in this emerging field of study.","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122381141","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}

{"title":"Regression Technique for Electromagnetic Field Sampling and Reconstruction","authors":"S. Rondineau, B. Fuchs, F. B. Ribeiro Costa, L. Le Coq, E. Gonçalves Sousa, M. Migliore","doi":"10.1109/iceaa.2019.8879005","DOIUrl":"https://doi.org/10.1109/iceaa.2019.8879005","url":null,"abstract":"The presented work deals with an alternative technique for sampling and reconstructing the electromagnetic field radiated by any kind of antenna or equivalent currents, and measured in its far field region. Based on the electrical size of the radiating object, it truncates the vector spherical modal field expansion series. Then, each component of the field is projected on the classical Fourier space for the polar dependency. This is carried out by minimizing the variance of the residual noise, or, in other words, by applying the Tikhonov-Phillips regularization scheme. This results is not only a numerically well-posed problem, but also in the statistical independence of the resulting coefficients as their co-variance matrix is diagonal. Afterwards, the azimuth dependency is projected on the real valued Gegenbauer, also known as ultra-spherical, polynomial family, once again following the Tikhonov-Phillips regularization scheme. Once again, it does not only result in a numerically well-posed problem, leading to a statistical independence of the obtained spherical modal coefficients. Moreover this double regression technique leads to the smallest two-dimensional Cartesian grid of angular sampling positions, a very useful result for the far field antenna characterization industry where measurement time has to be reduced as much as possible. Additionally to this, both optimum estimators and stable regularizer are also extracted. Then, a statistical analysis of the residual error is performed by extracting and analyzing the noise properties and also creating a statistical filter that rejects any mode that is not statistically significant through the definition of a modal signal-to-noise ratio. This result turns out to be very useful when this technique is applied in a compressive-sensing-like radiated far field antenna analysis. At last, these estimators are modified to attend cases where the measured data do not form a full column ranked matrix. This corresponds to the case where measurements data are lacking in the previously defined smallest two-dimensional Cartesian grid of angular sampling positions. This technique is then applied to several different antenna measurements, as shown on fig. 1, where can be noticed a very good matching between in the far $E_{theta}$ and $E_{varphi}$ field 2D map in amplitude comparison of both the measured electric field and the reconstructed one for a flat metallic Luneburg lens antenna designed at the frequency 12 GHz in the frame of MERLIN, which is a joint laboratory of Thalès Alenia Space and IETR. More details about this radiating structure are available in the reference [1].","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115853144","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}

{"title":"Study and Optimization of a Non-Foster Circuit for the Design of Wideband Metasurfaces","authors":"Christophe Fisné, C. Martel, A. Franc, N. Raveu","doi":"10.1109/ICEAA.2019.8879230","DOIUrl":"https://doi.org/10.1109/ICEAA.2019.8879230","url":null,"abstract":"In this paper, a detailed study and the optimization of a Negative Impedance Converter (NIC) circuit are presented to increase the bandwidth of a passive metasurface. The design and optimization procedure take into account the biasing and the effect of the transistors. The optimization ensures that the load can be realized with passive components.","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123922510","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}

{"title":"Extended-SDIM: An efficient technique for rigorous evaluation of electromagnetic scattering by a 2D rough surface","authors":"Y. Arencibia Noa, C. Bourlier, G. Kubické, S. Bellez","doi":"10.1109/ICEAA.2019.8878982","DOIUrl":"https://doi.org/10.1109/ICEAA.2019.8878982","url":null,"abstract":"We present the Extended-Sub-domain Decomposition Iterative Method (E-SDIM), as the generalization of the SDIM, in order to rigorously solve the problem of electromagnetic scattering by a randomly rough and perfectly conducting 2D surface. An iterative scheme is used to efficiently solve the linear system resulting from the discretization, by the Method of Moments (MoM), of the Electric Field Integral Equation (EFIE). Thanks to the block decomposition of the surface, the self and inter block interactions are respectively represented by the impedance and coupling matrices. The coupling matrices are compressed using the Adaptive Cross Approximation (ACA) algorithm in order to accelerate the matrix-vector products and reduce the need for memory space.","PeriodicalId":237030,"journal":{"name":"2019 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131114473","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}