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2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)最新文献

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Field enhancement in polymer waveguides fabricated by UV imprinting UV印迹聚合物波导的场增强
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-31 DOI: 10.1109/IMOC.2011.6169321
P. Karioja, M. Hiltunen, J. Hiltunen, J. Tuominen, Meng Wang, R. Myllyla, S. Pearce, M. Charlton
{"title":"Field enhancement in polymer waveguides fabricated by UV imprinting","authors":"P. Karioja, M. Hiltunen, J. Hiltunen, J. Tuominen, Meng Wang, R. Myllyla, S. Pearce, M. Charlton","doi":"10.1109/IMOC.2011.6169321","DOIUrl":"https://doi.org/10.1109/IMOC.2011.6169321","url":null,"abstract":"Polymers are applicable materials for photonic device fabrication due to their good optical properties and versatile processability at low temperatures, and therefore, provide possibility for low-cost fabrication. For waveguide device fabrication, the most critical requirement is the selection of the patterning method for the ridge that is bounding the optical mode in the waveguide. In this paper, we review our UV-imprinting achievements for fabricating polymer-based single-mode waveguides: ridge, inverted ridge and layered composite waveguides. In addition, we show simulation results for polymer-based slot waveguides. The ridge waveguide consists of a strip waveguide core superimposed onto a slab waveguide made of the core material. When patterning a ridge by imprinting technique, a residual layer is formed underneath the imprinted ridges. The residual layer might cause propagation loss due to power leakage into the slab guide, and therefore, a subsequent etching step is required. In the inverted ridge waveguide configuration, a groove of cladding material is patterned by imprinting, and followed by the filling of the groove with the core material. From the imprint fabrication point of view, the fabrication tolerances can be relaxed due to the fact that the residual slab layer underneath the waveguide can have arbitrary thickness. Besides fabrication of above mentioned waveguide structures, we review the possibility to fabricate composite waveguide devices by depositing inorganic thin films with high-refractive index on UV-imprinted polymeric structures with low-refractive index. The aim to use composite structures is to manipulate the optical field distribution in the waveguides and to enhance the interaction of the optical field with the surface, which is desirable especially in waveguide sensor applications. The polymer-based slot waveguide, which is analyzed theoretically, is an ultimate approach for optical field enhancement.","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133094617","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
Characteristics of nighttime West-to-East VLF waves propagation using the South America VLF Network (SAVNET) 南美洲VLF网(SAVNET)夜间从西向东的VLF波传播特征
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-20 DOI: 10.1109/URSIGASS.2011.6050787
J. Samanes, J. Raulin
{"title":"Characteristics of nighttime West-to-East VLF waves propagation using the South America VLF Network (SAVNET)","authors":"J. Samanes, J. Raulin","doi":"10.1109/URSIGASS.2011.6050787","DOIUrl":"https://doi.org/10.1109/URSIGASS.2011.6050787","url":null,"abstract":"We present the monitoring of ∼4 years of daily VLF amplitude curves using two parallel propagation paths from the South America VLF Network (SAVNET). During this period, the time of occurrence (Teminator Times) of deep amplitude minima were measured. We discuss typical properties of West-to-East VLF subionospheric propagation like the seasonal effect on the temporal evolution of Terminator Times, the fact that they are simultaneously detected on parallel propagation paths, and the derivation of the undisturbed nighttime ionospheric height. The method known as the terminator time is also a promising way of looking for possible seismic-electromagnetic effects.","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"255 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120862978","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
Wireless sensor network analysis using the finite element boundary integral numerical technique 无线传感器网络的有限元边界积分数值分析技术
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-01 DOI: 10.1109/IMOC.2011.6169236
J. Mologni, Kaku Saito
{"title":"Wireless sensor network analysis using the finite element boundary integral numerical technique","authors":"J. Mologni, Kaku Saito","doi":"10.1109/IMOC.2011.6169236","DOIUrl":"https://doi.org/10.1109/IMOC.2011.6169236","url":null,"abstract":"Wireless sensor technology is becoming a practical replacement to the conventional wired sensors primarily due to the easiness of implementation and cost reduction. In spite of that, process industries are not still using such kind of solution in large scale due to lack of field-proven data related to robustness and reliability of the communication link. A wireless sensor network (WSN) consists of spatially distributed independent sensors that are connected to a wired gateway. The present study shows a full wave simulation of a WSN installed in a subsection of a refinery coupled to a circuit simulator that generates electric wave forms according to IEEE 802.11 specification. The finite element boundary integral (FEBI) approach, which is now commercially available in Ansys HFSS, was used to solve the electromagnetic model. The advantages of FEBI for solving very large field problems are presented and the simulation results were compared to the finite element method (FEM) and the method of moments (MoM). The integration of a 3D field solver and a circuit simulator enables the calculation of radiation patterns, electric field plots, bit error rate, constellation plots while incorporating the actual transmitter and receiver antennas and the electrical schematic of the sensors and gateway. The purpose of this simulation is to investigate the limitation of the technology, help engineers to create best practices for WSN installation and to give an approach for the optimization of gateways positioning.","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115369323","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
Analysis of dual-fed circularly-polarized circular patch antennas for educational purposes 双馈圆极化圆贴片天线教学分析
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-01 DOI: 10.1109/IMOC.2011.6169361
A. Tinoco-S., D. Maciel, Daniel C. Nascimento, J. Lacava, S. Sant’anna
{"title":"Analysis of dual-fed circularly-polarized circular patch antennas for educational purposes","authors":"A. Tinoco-S., D. Maciel, Daniel C. Nascimento, J. Lacava, S. Sant’anna","doi":"10.1109/IMOC.2011.6169361","DOIUrl":"https://doi.org/10.1109/IMOC.2011.6169361","url":null,"abstract":"Approximated expressions for the radiation characteristics of dual-fed circularly-polarized circular patch antennas are addressed in this article. By fitting the antenna radiation pattern with a cosine function, a simple closed-form expression for the antenna directivity is obtained. As an example, a linear phased array of five right-hand CP elements is presented. In order to validate the proposed approach, our results are compared with simulations performed using the commercial IE3D™ software.","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123147078","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
Microwave dielectric properties of Ca (Nb2/3Li1/3)xTi1−xO3−δ (CNLTOX) Ca (Nb2/3Li1/3)xTi1−xO3−δ (CNLTOX)的微波介电性能
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-01 DOI: 10.1109/IMOC.2011.6169266
A. C. S. Costa, R. D. S. Costa, F. W. de O. Amarante, T. Fernandes, M. D. da Silva, A. Sombra, G. D. Saraiva
{"title":"Microwave dielectric properties of Ca (Nb2/3Li1/3)xTi1−xO3−δ (CNLTOX)","authors":"A. C. S. Costa, R. D. S. Costa, F. W. de O. Amarante, T. Fernandes, M. D. da Silva, A. Sombra, G. D. Saraiva","doi":"10.1109/IMOC.2011.6169266","DOIUrl":"https://doi.org/10.1109/IMOC.2011.6169266","url":null,"abstract":"Modified CaTiO<inf>3</inf> (CTO) ceramics were prepared by the conventional solid-state method. The samples belong to the Pbnm spatial group, showing an orthorhombic structure. The microwave dielectric properties of the Ca[(Li<inf>1/3</inf>Nb<inf>2/3</inf>)<inf>x</inf>Ti<inf>1−x</inf>]O<inf>3−δ</inf> for ball-milled samples with ratio of 2.4 balls/g, which were calcinated at 900°C (during 5h) and sintered at 1000°C (during 3h) were investigated. The dielectric permittivity decreased with the decreasing of titanium amount. A decrease in the temperature coefficient in resonant frequency (τ<inf>f</inf>) was observed with the increase of the X value.","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127271108","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
Field trial of an inband OSNR monitor based on polarization extinction 基于偏振消光的带内OSNR监测仪的现场试验
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-01 DOI: 10.1109/IMOC.2011.6169254
C. Floridia, G. Simões, E. W. Bezerra, M. M. Feres, M. Romero
{"title":"Field trial of an inband OSNR monitor based on polarization extinction","authors":"C. Floridia, G. Simões, E. W. Bezerra, M. M. Feres, M. Romero","doi":"10.1109/IMOC.2011.6169254","DOIUrl":"https://doi.org/10.1109/IMOC.2011.6169254","url":null,"abstract":"We present a field trial of an inband OSNR monitor based on polarization extinction. The field trial was carried out at the GIGA network, in the presence of significant artifacts due to the use of dispersion compensators based on FBG technology. The monitor is demonstrated to measure OSNR values from 5 to 35 dB with ±0.6 dB accuracy, for optical power levels above −40 dBm.","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115596318","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
Fiber optic bending loss sensor for application on monitoring of embankment dams 光纤弯曲损耗传感器在堤防监测中的应用
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-01 DOI: 10.1109/IMOC.2011.6169273
L. A. Ribeiro, J. Rosolem, D. C. Dini, C. Floridia, Claudio A. Hortencio, Eduardo F. da Costa, E. W. Bezerra, Rinaldo B. de Oliveira, Marcelo D. Loichate, Anderson S. Durelli
{"title":"Fiber optic bending loss sensor for application on monitoring of embankment dams","authors":"L. A. Ribeiro, J. Rosolem, D. C. Dini, C. Floridia, Claudio A. Hortencio, Eduardo F. da Costa, E. W. Bezerra, Rinaldo B. de Oliveira, Marcelo D. Loichate, Anderson S. Durelli","doi":"10.1109/IMOC.2011.6169273","DOIUrl":"https://doi.org/10.1109/IMOC.2011.6169273","url":null,"abstract":"We propose a fiber optic sensor system based on fiber bending loss and Optical Time Domain Reflectometry (OTDR) to application on monitoring of embankment dams. The sensing system was developed to monitor indirectly the water level penetration on the embankment dam by measuring the water pressure. The bend loss sensor performance was assessed concerning the number of fiber loops involved, the pump wavelength and temporal width of the pulse. Sensor system link is proposed to have a number of at least six sensors stages totally independent each other, in such a way that each stage can be developed to monitor a specific situation. In order to protect the sensor stage against environmental damage and to match the mechanical properties of the fiber and the water, we proposed a special packaging based on silicone rubber.","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123010255","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
Evaluation of NRZ-DQPSK signals amplified by semiconductor optical amplifier 半导体光放大器放大NRZ-DQPSK信号的评价
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-01 DOI: 10.1109/IMOC.2011.6169350
P. Rocha, C. Gallep, E. Conforti
{"title":"Evaluation of NRZ-DQPSK signals amplified by semiconductor optical amplifier","authors":"P. Rocha, C. Gallep, E. Conforti","doi":"10.1109/IMOC.2011.6169350","DOIUrl":"https://doi.org/10.1109/IMOC.2011.6169350","url":null,"abstract":"Numerical results for the performance of simple NRZ-DQPSK optical link is analyzed in reference to the impact of using semiconductor optical amplifiers. The induced phase-noise impacts on fiber propagation, showing small but not negligible power penalty for 10Gbps and 20Gbps links (respect. 0.04dB/km and 0.1dB/km plus 1dB (SOA);BER=10−9).","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114144765","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
Study of the geometric complexity reduction of a quasi-fractal FSS using WCIP 利用WCIP降低拟分形FSS几何复杂度的研究
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-01 DOI: 10.1109/IMOC.2011.6169411
Emanuele da Silva Rodrigues Montalvao, Augusto Cesar Pereira da Silva Montalvao, A. D’assunção, L. M. de Mendonça, A. Neto
{"title":"Study of the geometric complexity reduction of a quasi-fractal FSS using WCIP","authors":"Emanuele da Silva Rodrigues Montalvao, Augusto Cesar Pereira da Silva Montalvao, A. D’assunção, L. M. de Mendonça, A. Neto","doi":"10.1109/IMOC.2011.6169411","DOIUrl":"https://doi.org/10.1109/IMOC.2011.6169411","url":null,"abstract":"This work presents a design procedure for a simplified geometric quasi-fractal FSS, that starts with the analysis of the effect of several geometry details (small gaps) on the frequency behavior. Firstly FSS structures are numerically analyzed, using the Wave Concept Iterative Procedure (WCIP). Secondly they are experimentally characterized. Thereafter a comparison between simulated and measured results is performed, as well as an investigation of the effect of the FSS geometry on the resonant frequency using the electric and magnetic field distributions, the latter through the electrical current density vector.","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122231521","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
Analysis of multilayer circuits by an efficient iterative technique 多层电路的高效迭代分析
2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011) Pub Date : 2011-10-01 DOI: 10.1109/IMOC.2011.6169301
A. Serres, G. K. F. Serres, G. Fontgalland, J. D. de Farias, H. Baudrand
{"title":"Analysis of multilayer circuits by an efficient iterative technique","authors":"A. Serres, G. K. F. Serres, G. Fontgalland, J. D. de Farias, H. Baudrand","doi":"10.1109/IMOC.2011.6169301","DOIUrl":"https://doi.org/10.1109/IMOC.2011.6169301","url":null,"abstract":"An efficient iterative technique based on the wave concept (WCIP) for designing multilayer planar circuits is presented. The algorithm is based on the use of a recursive relationship between incident waves and reflected waves from several planes of discontinuity, instead of an integral equation. The convergence is insured independently of the kind or number of interfaces of the structure. The method herein presented solves for the current density and the tangential electrical field on the interface. The formulation permits to solve several problems by applying dual quantities. A two-dimensional fast modal transformation (FMT) algorithm using periodic walls is used with a 2D-FFT algorithm, in order to simplify calculations and accelerate the convergence. In this sense, a program in MATLAB has been elaborated to validate this approach. The numerical results are compared with those in the available literature.","PeriodicalId":179351,"journal":{"name":"2011 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC 2011)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124660839","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
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