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2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)最新文献

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Three-section asymmetric differentially-fed broadband coupled-line directional coupler 三段非对称差分馈电宽带耦合线定向耦合器
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520485
K. Janisz, I. Piekarz, A. Rydosz, K. Wincza, S. Gruszczynski
{"title":"Three-section asymmetric differentially-fed broadband coupled-line directional coupler","authors":"K. Janisz, I. Piekarz, A. Rydosz, K. Wincza, S. Gruszczynski","doi":"10.1109/ICEAA.2018.8520485","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520485","url":null,"abstract":"A design of a differentially exited directional coupler with the utilization of balanced lines is shown. An edge-coupled stripline technology is proposed for its physical realization. Such a realization technique is for the first time proposed for the design of multisection asymmetric couplers. For experimental verification a coupler operating between 0.29 and 1.7 GHz has been manufactured and measured.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"277 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121020112","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
Effects of Phone Case and User Effects on Switched-Beam High Gain Antenna System for 5G Mobile Terminals 手机壳和用户效应对5G移动终端切换波束高增益天线系统的影响
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520461
I. Syrytsin, Shuai Zhang, G. Pedersen
{"title":"Effects of Phone Case and User Effects on Switched-Beam High Gain Antenna System for 5G Mobile Terminals","authors":"I. Syrytsin, Shuai Zhang, G. Pedersen","doi":"10.1109/ICEAA.2018.8520461","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520461","url":null,"abstract":"In this paper, a switched-beam antenna array is proposed for 5G mobile terminals. The array can scan the beam in the endfire direction by switching between six directional antennas, which can be placed for example around a camera module. No phase shifters are required in order to achieve beamsteering. Each array element is based on a monopole with a corner reflector. The antenna operates at around 39 GHz with the bandwidth of 7 GHz. The performance is analysed in both situations of the array inside and outside a phone metal case with a screen. Furthermore, investigations with the whole-body phantom are also carried out. The 2D radiation patterns of the proposed antenna system inside and outside the case are measured to verify the simulations. The measured results show that the minimum gain of 11 dBi at the boresight directions is achieved with the antenna outside the case, and the minimum gain at the boresight directions is reduced to 7.5 dBi with the antenna inside the case. In practices, the antenna system can be integrated together with a camera module, and steer the beams with high gain and low loss.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121048282","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 Low-Profile Phase Correcting Solution to Improve Directivity of Horn Antenna 一种提高喇叭天线指向性的低姿态相位校正方法
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520527
A. Kiyani, K. Esselle, M. Afzal, L. Matekovits, R. Hashmi
{"title":"A Low-Profile Phase Correcting Solution to Improve Directivity of Horn Antenna","authors":"A. Kiyani, K. Esselle, M. Afzal, L. Matekovits, R. Hashmi","doi":"10.1109/ICEAA.2018.8520527","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520527","url":null,"abstract":"In this paper, we present a phase-corrected horn antenna with improved directivity. An increase in the horn aperture size results in a significantly non-uniform phase distribution contributing to the poor radiation characteristics. A low-profile phase correction surface (PCS) is therefore designed to address this problem. Significant improvement has been achieved in the horn antenna performance by placing the proposed PCS right at the mouth of the horn. The near-field transformation method is applied to demonstrate an improvement of 10 dBi in the peak directivity at the operating frequency of 11 GHz. This feature can be extended to manipulate the far-field pattern of horn and even for beam steering applications.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125966523","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
GNSS-R Parameter Sensitivities for Soil Moisture Retrieval GNSS-R参数对土壤湿度反演的敏感性
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520512
J. D. Campbell, M. Moghaddam
{"title":"GNSS-R Parameter Sensitivities for Soil Moisture Retrieval","authors":"J. D. Campbell, M. Moghaddam","doi":"10.1109/ICEAA.2018.8520512","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520512","url":null,"abstract":"We consider the problem of retrieving soil moisture based on GNSS-R time series data with incidence angle diversity in the presence of instrument calibration errors, vegetation cover uncertainty, and surface roughness uncertainty. After defining an observation model and a retrieval cost function, we derive a formula for retrieval performance as a function of calibration uncertainty, time series parameters, and prior statistics. Numerical results illustrate relationships among various parameters.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114939898","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
Spectral Composition of the Scattered Field from a Large Metallic Cloaked Cylinder 大型金属掩体散射场的光谱组成
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520515
B. Cappello, L. Matekovits
{"title":"Spectral Composition of the Scattered Field from a Large Metallic Cloaked Cylinder","authors":"B. Cappello, L. Matekovits","doi":"10.1109/ICEAA.2018.8520515","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520515","url":null,"abstract":"An analysis of the spectral content of the scattered field by metallic cylinders covered by homogeneous mantle cloak is performed. In particular, a theoretical approach based on Mie Theory is considered for the computation of the scattered field, which is examined in terms of radar cross-section and scattering coefficients. The values of surface impedance that lead to the minimum of the radar cross section are determined as a function of the cylinder radius normalized with respect to the frequency of operation and of the dielectric material characteristics. Furthermore, the spectral composition of the scattered field for this optimal condition is evaluated and compared with that of the bare cylinder case.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122399389","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
Toroidal dipole modes and anapole states in metamaterials 超材料中的环向偶极子模和拟极子态
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520436
A. Basharin
{"title":"Toroidal dipole modes and anapole states in metamaterials","authors":"A. Basharin","doi":"10.1109/ICEAA.2018.8520436","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520436","url":null,"abstract":"In this paper we discuss the role of toroidal multipoles in metamaterials and nanophotonics. We paid special attension to the problem of mean square radii of electric, magnetic and toroidal moments. Moreover, the aforementioned effects like Kerker condition and Fano conditions are considered.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122753448","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
Performance of a Massively Parallel Higher-Order Method of Moments Code Using Thousands of CPUs 基于数千个cpu的矩码大规模并行高阶方法的性能研究
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520429
Z. Lin, X. Zhao, Y. Zhang, T. Sarkar
{"title":"Performance of a Massively Parallel Higher-Order Method of Moments Code Using Thousands of CPUs","authors":"Z. Lin, X. Zhao, Y. Zhang, T. Sarkar","doi":"10.1109/ICEAA.2018.8520429","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520429","url":null,"abstract":"The efficiency and scalability of a parallel higher-order method of moments is illustrated using up to 4096 CPU cores on a supercomputer. The scattering problems solved includes the analysis from a full scale airplane. The scattering problem is simulated to demonstrate the efficiency and scalability of the algorithm. Numerical results show that one can achieve above 60% efficiency when the used memory to the total memory ratio is larger than 15%, and the scalability can reach a theoretical value between O(N2) and O(N3), where N is the number of unknowns. Due to its high efficiency and excellent scalability, the algorithm is able to accurately solve large complex electromagnetic radiation and scattering problems including composite and multi-scale structures.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122032114","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
Various Topologies of Coupled-Mode Structures Exhibiting Exceptional Points of Degeneracy 具有特殊简并点的耦合模结构的各种拓扑
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520525
M. Y. Nada, Ahmed F. Abdelshafy, T. Mealy, Farshad Yazdi, H. Kazemi, A. Figotin, F. Capolino
{"title":"Various Topologies of Coupled-Mode Structures Exhibiting Exceptional Points of Degeneracy","authors":"M. Y. Nada, Ahmed F. Abdelshafy, T. Mealy, Farshad Yazdi, H. Kazemi, A. Figotin, F. Capolino","doi":"10.1109/ICEAA.2018.8520525","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520525","url":null,"abstract":"We investigate the modal characteristics of coupled-mode guiding structures in which the supported eigenmodes coalesce; the condition we refer to as an exceptional point of degeneracy (EPD). EPD is a point in a system parameter space at which the system eigenmodes coalesce in both their eigenvalues and eigenvectors, where the number of coalescing eigenmodes at the EPD defines the order of the degeneracy. First, we investigate the prospects of gain/loss balance and how it is related to realizing an EPD. Under geometrical symmetry in coupled resonators or coupled waveguides such scheme is often attributed to PT-symmetry; however, we generalize the concept of PT-symmetry to coupled waveguides exhibiting EPDs that do not necessarily have perfect geometrical symmetry. Secondly, we explore the conditions that lead to the existence of EPDs in periodically coupled waveguides that may be lossless and gainless. In general, we investigate properties associated to the emergence of EPDs in various cases: i) uniform, and ii) periodic, lossy or lossless, coupled-mode structures. Generally, the EPD condition is very sensitive to perturbations; however, it was shown recently with experimental and theoretical studies that EPDs' unconventionai properties exist even in the presence of loss and fabrication errors. Extraordinary properties of such systems at EPDs, such as the giant scaling of the quality factor and the high sensitivity to perturbation, provide opportunities for various applications in traveling wave tubes, pulse compressors and generators, oscillators, switches, modulators, lasers, and extremely sensitive sensors.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128613190","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
Fast Iterative Techniques for the Simulations of Large Antenna Arrays 大型天线阵模拟的快速迭代技术
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520354
Ha Bui-Van, Thomas Pairon, C. Craeye
{"title":"Fast Iterative Techniques for the Simulations of Large Antenna Arrays","authors":"Ha Bui-Van, Thomas Pairon, C. Craeye","doi":"10.1109/ICEAA.2018.8520354","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520354","url":null,"abstract":"A fast iterative solver is presented to analyze large random arrays made of identical elements. The technique exploits the macro basis functions (MBFs) to represent the currents on the antennas. Furthermore, those MBFs are supposed to be the same on all antennas. This feature accelerates the exploitation of the fast multipoles method in that the radiation patterns of MBFs are the same on each element.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129039148","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
Sidelobe Suppression in Resonant Cavity Antennas through Near-field Analysis 基于近场分析的谐振腔天线旁瓣抑制
2018 International Conference on Electromagnetics in Advanced Applications (ICEAA) Pub Date : 2018-09-01 DOI: 10.1109/ICEAA.2018.8520396
A. A. Baba, R. Hashmi, K. Esselle, A. Weily, L. Matekovits
{"title":"Sidelobe Suppression in Resonant Cavity Antennas through Near-field Analysis","authors":"A. A. Baba, R. Hashmi, K. Esselle, A. Weily, L. Matekovits","doi":"10.1109/ICEAA.2018.8520396","DOIUrl":"https://doi.org/10.1109/ICEAA.2018.8520396","url":null,"abstract":"This paper describes an effective approach to reduce the high sidelobe levels (SLLs) in resonant cavity antennas (RCAs) with small footprints. The objective is to first understand the reason behind the high SLL in compact RCAs and than improve its radiation characteristics. For this, a near-field to far-field transformation routine is implemented in MATLAB, which allows to understand the individual effects of near-field amplitude and phase distributions on the SLL in the far-field patterns. This approach resulted in an optimal electric-field distribution, which is realized by a dielectric partially reflecting superstructure (PRS) exhibiting a broadside directivity of 19.5 dBi with significantly low sidelobe levels of -30dB in both the principle planes. It is important to note that the proposed approach can be linked easily with global optimization techniques to fit the radiation patterns within specific pattern masks.","PeriodicalId":258686,"journal":{"name":"2018 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":" 678","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120829278","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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