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2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)最新文献

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Parametric study of rectangular patch antenna using denim textile material 牛仔织物材料矩形贴片天线参数化研究
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646439
M. Grilo, F. Salete Correra
{"title":"Parametric study of rectangular patch antenna using denim textile material","authors":"M. Grilo, F. Salete Correra","doi":"10.1109/IMOC.2013.6646439","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646439","url":null,"abstract":"This paper presents a textile patch antenna designed for WBAN applications at 2.45 GHz ISM band. The antenna uses denim as substrate and conductive fabric for the ground plane and radiator layers. The main purpose of this paper is to analyze the influence of typical deviation of denim properties and patch radiator dimensions on the performance of the antenna. The parameters considered in the analysis are the relative permittivity and thickness of denim and the width and length of the rectangular patch radiator. The dependence of the central operation frequency of the antenna on those parameters was studied using the antenna reflection coefficient obtained from EM simulations. Rules of thumb for one-shot design were derived and applied to design a rectangular patch antenna. An antenna prototype was fabricated and measured, demonstrating a 10 dB impedance band of 4.8 % centered at 2.45 GHz, in good agreement with simulated results.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121703845","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: 18
Optical transmission of SC-FDE signals over multimode experimental channels SC-FDE信号在多模实验信道上的光传输
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646586
Celio K. H. Vasconcelos, Luiz A. Pivato, A. Barreto, D. Mello, F. Simões, Julio Oliveira
{"title":"Optical transmission of SC-FDE signals over multimode experimental channels","authors":"Celio K. H. Vasconcelos, Luiz A. Pivato, A. Barreto, D. Mello, F. Simões, Julio Oliveira","doi":"10.1109/IMOC.2013.6646586","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646586","url":null,"abstract":"SC-FDE has been investigated as a possible alternative to compensate for modal dispersion in data center optical interconnects. The performance of this solution has been previously evaluated under the assumption of a theoretical channel with Gaussian profile. This paper investigates the transmission of SC-FDE using optical channels obtained from experimental measurements in OM-3 fibers. The experimental results indicated the existence of side lobes in the channel transfer function. However, these side lobes were so attenuated that the Gaussian assumption was a suitable approximation in all evaluated scenarios.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122496961","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
Design of an FBG based-on sensor device for large displacement deformation 基于光纤光栅的大位移变形传感装置的设计
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646409
M. Ciminello, S. Ameduri, Domenico Flauto
{"title":"Design of an FBG based-on sensor device for large displacement deformation","authors":"M. Ciminello, S. Ameduri, Domenico Flauto","doi":"10.1109/IMOC.2013.6646409","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646409","url":null,"abstract":"This article deals with the modeling of a strain-displacement transducer conceived for extending the FBG measurement range. The intrinsic fragility of the optical fiber limits their application to cases characterized by relatively small deformations. To extend the employ to the large displacement field (i.e. morphing applications), a dedicated device was conceived, constituted by a circular ring connected to the structure and laterally integrated with a FBG sensor. This device was mathematically modeled minimizing the potential energy this way arriving at a description of the displacement and deformation field along the curvilinear abscissa. The theoretical predictions were then validated through the FE approach, arriving to precious design and operative considerations on the use of the device itself.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116200446","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: 11
A DC design of an X-band traveling-wave tube x波段行波管的直流设计
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646550
C. C. Xavier, C. Motta
{"title":"A DC design of an X-band traveling-wave tube","authors":"C. C. Xavier, C. Motta","doi":"10.1109/IMOC.2013.6646550","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646550","url":null,"abstract":"In this paper a dc design procedure of a X-band traveling-wave tube is described. This procedure consists in determine the geometry of the electron gun, the periodic permanent magnetic and the electron collector. It was found that an electron gun with a 0.26 μPerv, 9.1 kV, 225 mA and 0.6 mm beam radius without electrostatic beam control was suitable for this design. The PPM, constructed with samarium-cobalt magnetics shown a good agreement with theoretical design. Finally a three stage depressed collector, to recover part of non-used electron energy and improve the overall electronic efficiency of TWT, is presented. The simulations were run with Particle-in-cell Studio.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127451653","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
Geometry dependence of light propagation through subwavelength metallic gratings 光通过亚波长金属光栅传播的几何依赖性
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646530
J. J. Isídio-Lima, V. Rodriguez‐Esquerre, J. C. da Silva
{"title":"Geometry dependence of light propagation through subwavelength metallic gratings","authors":"J. J. Isídio-Lima, V. Rodriguez‐Esquerre, J. C. da Silva","doi":"10.1109/IMOC.2013.6646530","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646530","url":null,"abstract":"In this work we have performed a numerical analysis of the influence of the geometry on the propagation characteristics of subwavelength metallic gratings composed by gold or silver over a dielectric substrate. The reflection and transmission coefficients for the TE and TM modes as a function of the incident angle were calculated.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131251549","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
Superdirective magnetic nanoantennas with effect of light steering: Theory and experiment 具有光导向效应的超定向磁性纳米天线:理论与实验
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646491
Alex Krasnok, Dmitry S. Filonov, A. Slobozhanyuk, P. A. Belov, Constantin R. Simovski, Y. Kivshar
{"title":"Superdirective magnetic nanoantennas with effect of light steering: Theory and experiment","authors":"Alex Krasnok, Dmitry S. Filonov, A. Slobozhanyuk, P. A. Belov, Constantin R. Simovski, Y. Kivshar","doi":"10.1109/IMOC.2013.6646491","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646491","url":null,"abstract":"We introduce a novel concept of superdirective nanoantennas based on the generation of higher-order optically-induced magnetic multipoles. Such an all-dielectric nanoantenna can be realized as an optically small spherical dielectric nanoparticle with a notch excited by a point source located in the notch. Proposed superdirectivity effect is not associated with high dissipative losses, because of the magnetic nature of the nanoantenna operation. For these dielectric nanoantennas we predict the effect of the beam steering at the nanoscale characterized by a subwavelength sensitivity of the beam radiation direction to the source position. We confirm the predicted effects experimentally through scaling to the microwave frequency range.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134464110","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
Synthesis of linear antenna array for 4G mobile communication systems 4G移动通信系统线性天线阵列的合成
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646430
E. Schlosser, M. Heckler, C. Lucatel, Mauricio Sperandio, Renato B. Machado
{"title":"Synthesis of linear antenna array for 4G mobile communication systems","authors":"E. Schlosser, M. Heckler, C. Lucatel, Mauricio Sperandio, Renato B. Machado","doi":"10.1109/IMOC.2013.6646430","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646430","url":null,"abstract":"This paper presents the application of optimization methods for the synthesis of a linear array to operate in the frequency range of 4G technology in Brazil. The desired pattern shall exhibit squared-cosecant shape, so as to provide uniform distribution of power inside the base station cell and to reduce co-channel interference. Such an array is well suited to operate as a radio base station of mobile communications systems. The synthesis is performed by a combination of optimization methods: the genetic algorithm, which is used for the initial global search, and the sequential quadratic programming, which is applied for local refinement of the solution. This approach allows faster convergence than using only one kind of optimization method. The technique is demonstrated for a linear array of isotropic elements and, subsequently, for an array of E-shaped microstrip antennas.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132483809","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: 7
Numerical study of tapered fiber optics as evanescent field sensors 锥形光纤倏逝场传感器的数值研究
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646464
E. Baude
{"title":"Numerical study of tapered fiber optics as evanescent field sensors","authors":"E. Baude","doi":"10.1109/IMOC.2013.6646464","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646464","url":null,"abstract":"This paper presents some results obtained for the numerical simulation of tapered fiber optics. Some features, insertion loss and effective index, are compared for two main settings of these devices. Two well-established numerical techniques were used here: the Finite Difference - Beam Propagation Method to simulate insertion losses for different tapered fiber diameters and external materials, and the Finite Element Method to simulate the effective index variation at the tapered region of the fiber. The results shows that tapers with concomitant reduction of core and cladding have greater susceptibility than tapers with reduction only in the cladding to changes in surrounding medium, thus being more suitable as sensor device.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"538 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132569935","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
A free space measurement approach for dielectric material characterization 介电材料特性的自由空间测量方法
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646474
Leno Rocha, C. Junqueira, Ediana Gambin, Alexandre Nata Vicente, A. E. Culhaoglu, E. Kemptner
{"title":"A free space measurement approach for dielectric material characterization","authors":"Leno Rocha, C. Junqueira, Ediana Gambin, Alexandre Nata Vicente, A. E. Culhaoglu, E. Kemptner","doi":"10.1109/IMOC.2013.6646474","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646474","url":null,"abstract":"The free space method allows nondestructive dielectric characterization of materials in a wide range of frequencies and temperatures, which is basic to several applications, as the development of radomes for aerospace proposals. This paper comprises the free space method from an initial procedure, the TRL calibration, to the permittivity calculation by the NRW method, including the software implemented and its practical validation with specific materials.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132977585","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: 15
Removal of finite ground plane effect from antenna measurements via the inverse source technique 利用逆源技术去除天线测量中的有限地平面效应
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646508
J. A. Araque Quijano, L. Foged, G. Vecchi
{"title":"Removal of finite ground plane effect from antenna measurements via the inverse source technique","authors":"J. A. Araque Quijano, L. Foged, G. Vecchi","doi":"10.1109/IMOC.2013.6646508","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646508","url":null,"abstract":"We present a numerical technique to compute the field due to antennas above an infinite ground plane starting from measurements with finite ground planes. The technique works under the assumption of weak coupling between the antenna and the finite plane discontinuities but is otherwise general since it is based on rigorous field symmetry relations. Application of the technique requires a two-step process starting with the computation of surface equivalent sources which reproduce the actual antenna fields (with finite ground plane) in all points of space outside their support. These equivalent sources are then employed to compute the fields with infinite ground plane. Numerical results confirm the effectiveness of the technique.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133310289","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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