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2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)最新文献

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Study on optical detection of real partial discharges generated by different electrodes 不同电极产生的局部放电的光学检测研究
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317638
J. P. V. Fracarolli, J. Rosolem, C. Floridia, W. Cano, D. C. Dini, A. G. D. Melo, Daniel Benetti
{"title":"Study on optical detection of real partial discharges generated by different electrodes","authors":"J. P. V. Fracarolli, J. Rosolem, C. Floridia, W. Cano, D. C. Dini, A. G. D. Melo, Daniel Benetti","doi":"10.1109/IMOC43827.2019.9317638","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317638","url":null,"abstract":"In this work, we propose and analyze an FBGbased acoustic sensor to detect Partial Discharges (PD) in power transformers. This sensor was designed to respond to the Acoustic Emissions (AE) resulting from the discharges, using a mandrel-shaped transducer with an FBG attached to its surface. We obtained the frequency response of the sensor and compared to the response of a piezoelectric hydrophone. While the hydrophone responded to 50 and 200 kHz, the optical sensor responded to 16 and 40 kHz. We also generated PD using two types of electrodes connected to a sparkler, measuring AE with the FBG and with the hydrophone. We observed that the optical sensor and piezoelectric have similar responses, confirming the feasibility of the proposed transducer.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129993540","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 a New Type of Micrometer-Structured Non-Diffracting Wave Field: Surface Beams Based on Continuous Superpositions of Zeroth-Order Bessel Beams 一种新型微米结构无绕射波场:基于零阶贝塞尔光束连续叠加的表面光束
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317413
L. Ambrosio
{"title":"On a New Type of Micrometer-Structured Non-Diffracting Wave Field: Surface Beams Based on Continuous Superpositions of Zeroth-Order Bessel Beams","authors":"L. Ambrosio","doi":"10.1109/IMOC43827.2019.9317413","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317413","url":null,"abstract":"In this work, a new type of non-diffracting beam constructed from continuous superpositions of scalar zerothorder Bessel beams is theoretically and numerically investigated. The main idea is to provide solutions to the scalar wave equation whose field intensity pattern can be arbitrarily specified over a Cartesian surface within the range of – at most a few millimeters. The resulting micrometer-structured beam is expected to serve as laser beams for optical trapping and manipulation of small particles, atom guiding, photophoretictrap and holographic volumetric displays, micromachining, 2D and 3D imaging and printing, among others. The method here presented could be further extended in order to encompass vector beams and advanced techniques to reduce interference effects.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124586049","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
An electromagnetic multi-parameter strategy to detect faults in anchor rods using neural networks 基于神经网络的锚杆电磁多参数故障检测策略
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317602
D. Barbosa, L. D. de Medeiros, M. T. de Melo, L. L. Lourenço Novo, M. S. Coutinho, M. M. Alves, R. D. dos Santos, V. L. Tarragô, H. L. Lott Neto, P. Gama
{"title":"An electromagnetic multi-parameter strategy to detect faults in anchor rods using neural networks","authors":"D. Barbosa, L. D. de Medeiros, M. T. de Melo, L. L. Lourenço Novo, M. S. Coutinho, M. M. Alves, R. D. dos Santos, V. L. Tarragô, H. L. Lott Neto, P. Gama","doi":"10.1109/IMOC43827.2019.9317602","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317602","url":null,"abstract":"Network parameters are capable of conveying information about the constitution of a medium in which a highfrequency wave propagates. In this paper, this characteristic is exploited in order to design a nondestructive system to detect corrosion in anchor rods of guyed towers. A compound database is built with the simulated and measured parameters return loss, input impedance, and voltage standing wave ratio for normal and faulty rods examples. Artificial neural networks are used to capture underlying characteristics of data and establish relationships between these parameters and the presence of corrosion in the rods, without the need for physical models. Experimental results show that the innovative use of a multiparameter strategy achieves a high accuracy and enhances the detection capacity of the system.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116501990","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 Novel Methodology to Detect Faults on Anchor Rods Using Reflectometry and Machine Learning 利用反射法和机器学习检测锚杆故障的新方法
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317671
M. S. Coutinho, L. Novo, H. B. D. T. L. Neto, P. Gama, L. D. Medeiros, M. T. de Melo, Douglas Contente Barbosa Pimentel, M. M. Alves, V. L. Tarragô, R. G. M. D. Santos
{"title":"A Novel Methodology to Detect Faults on Anchor Rods Using Reflectometry and Machine Learning","authors":"M. S. Coutinho, L. Novo, H. B. D. T. L. Neto, P. Gama, L. D. Medeiros, M. T. de Melo, Douglas Contente Barbosa Pimentel, M. M. Alves, V. L. Tarragô, R. G. M. D. Santos","doi":"10.1109/IMOC43827.2019.9317671","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317671","url":null,"abstract":"This paper presents a new methodology based on a FDR technique and machine learning structure to detect faults on anchor rods used in guyed towers of power transmission lines. Such faults are due to material loss in the rods, which it may break them, and may case the tower falling. The methodology is a non-destructive technique (NDT) that is based on frequency domain reflectometry (FDR). For detection, high frequency pulses are inserted into anchor rod samples and the reflection coefficient is analyzed and compared to that obtained in the simulation results. Samples of anchor rods with and without faults were simulated, fabricated, measured and classified by a machine learning structure to determine the presence or absence of the faults.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122100557","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
UWB Bandpass Filter Using Spiral and Cross Inductors 采用螺旋和交叉电感的超宽带带通滤波器
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317566
J. F. Neto, L. C. Moreira, F. S. Correra
{"title":"UWB Bandpass Filter Using Spiral and Cross Inductors","authors":"J. F. Neto, L. C. Moreira, F. S. Correra","doi":"10.1109/IMOC43827.2019.9317566","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317566","url":null,"abstract":"This paper investigates the compromise between area and electrical performance of a bandpass filter in CMOS technology, when using planar spiral inductors, cross inductors and combinations of these two types of inductors. A third order UWB band filter with 5 to 10 GHz passband was designed with Chebyshev frequency response and T architecture in 130 nm CMOS technology. Equivalent electrical models for the inductors and capacitors in this technology were developed and used for filter optimization taking into account parasitic effects. Filter layout simulations have indicated that a suitable combination of planar spiral inductors and cross inductors reduces the filter area but preserves its performance. Comparing with the filter implemented only with the planar spiral inductors, there was a 3.5% reduction in the component area and a 5.8% reduction in the filter area.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116315070","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
Gradient-based Optimization for Unrepeatered Optical Systems 基于梯度的非中继光学系统优化
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317624
J. H. C. Júnior, F. L. Della Lucia, T. Sutili, Darli A. A. Melloy, R. Figueiredo
{"title":"Gradient-based Optimization for Unrepeatered Optical Systems","authors":"J. H. C. Júnior, F. L. Della Lucia, T. Sutili, Darli A. A. Melloy, R. Figueiredo","doi":"10.1109/IMOC43827.2019.9317624","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317624","url":null,"abstract":"We propose a multi-parameter adaptive technique based on the gradient descent algorithm (MAT-GRAD) for optimizing the amplification scheme in unrepeatered wavelength-division multiplexed optical systems. The proposed methodology uses the gradient descent method to jointly optimize the transmitter (Tx) and receiver (Rx) remote optically pumped amplifiers (ROPAs), as well as the Tx forward first-order distributed Raman amplifier (DRA). The MAT-GRAD algorithm is evaluated in combination with the conventional gradient descent algorithm (GDA), and GDA with momentum (GDAM). The simulations indicate that the MAT-GRAD with GDAM achieves a suitable minimum at a higher convergence speed.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124393768","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
Numerical Analysis of Different Nanoantennas in Reception Mode for Application in Optical Nanocircuits 光学纳米电路中不同接收方式纳米天线的数值分析
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317416
P. C. Lopes, P. R. Amaral, A. Cruz, Y. G. Conceição, K. Costa
{"title":"Numerical Analysis of Different Nanoantennas in Reception Mode for Application in Optical Nanocircuits","authors":"P. C. Lopes, P. R. Amaral, A. Cruz, Y. G. Conceição, K. Costa","doi":"10.1109/IMOC43827.2019.9317416","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317416","url":null,"abstract":"In this work, a study is made comparing different cases of optical nanoantennas in the reception mode. The nanoantennas considered are: dipole, dipole-loop, isolated loop and nanorod-loop, excited by a plane wave. The numerical analysis is performed by the Finite Element Method (FEM), where the received power by the load versus frequency is investigated for these four cases, results show better power reception is close to the resonant frequency for each case. It is also presented the analysis of an optical nanocircuit, which is composed by a receiving loop nanoantenna connected to a bifilar optical transmission line (OTL) in one side, and a dipole in the other side. In this case, a plane wave is the source and the near field is investigated.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126205715","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
FBG interrogator based on two-stage digital PI controller for high-frequency signals 基于两级数字PI控制器的高频信号FBG询问器
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317681
J. P. V. Fracarolli, Marcio C. Argentato, E. F. Costa, Joao R. Nogueira, A. G. D. Melo, Daniel Benetti
{"title":"FBG interrogator based on two-stage digital PI controller for high-frequency signals","authors":"J. P. V. Fracarolli, Marcio C. Argentato, E. F. Costa, Joao R. Nogueira, A. G. D. Melo, Daniel Benetti","doi":"10.1109/IMOC43827.2019.9317681","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317681","url":null,"abstract":"A fiber Bragg grating (FBG) interrogator with temperature compensation using digital proportional-integral (PI) controllers is proposed. This interrogator uses a two-stage controller design along with the edge-filter technique. The first stage is used to define the initial wavelength of the laser source, while the second stage locks the wavelength in order to follow the reflected optical power. We demonstrated the working principle of the interrogator using a climatic chamber, varying the temperature over an FBG from 25 to $60 ^{circ}mathrm{C}$. The reflected power remained constant, with a relative error of approximately 1%. We also applied a 50 kHz acoustic pulse to cause a vibration over the FBG, demonstrating that while the system compensates slow temperature variations, it can respond to fast signals, such as acoustic waves.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127173625","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
CRLH-based Reconfigurable Antenna Array for Handheld Devices 基于crhl的手持设备可重构天线阵列
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317558
A. Alves, D. Spadoti, S. Arismar Cerqueira
{"title":"CRLH-based Reconfigurable Antenna Array for Handheld Devices","authors":"A. Alves, D. Spadoti, S. Arismar Cerqueira","doi":"10.1109/IMOC43827.2019.9317558","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317558","url":null,"abstract":"This paper proposes a two-dimensional beam-steering millimeter wave antenna array with a compact tunable phase shifter based on composite right/left-handed (CRLH) cells. The array element is an aperture coupled microstrip slotted antenna with parasitic patches positioned on the higher layer for improving gain and bandwidth. The beam steering is accomplished by simply controlling the phase among the array elements. By using varactors to manage the CRLH cell phase. Numerical simulation results demonstrate gain of 17 dBi in a 3x3 array antenna, with sidelobe levels lower than -10dB, operating from 24.9 to 26.3 GHz. The scanning range is approximately ±20 degrees and the mutual coupling is -50dB.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133923451","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
Modeling of a Conical Antenna Applied in a Waveguide Device 锥形天线在波导器件中的应用
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317687
D. Tami, C. Rego, G. Ramos
{"title":"Modeling of a Conical Antenna Applied in a Waveguide Device","authors":"D. Tami, C. Rego, G. Ramos","doi":"10.1109/IMOC43827.2019.9317687","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317687","url":null,"abstract":"This work presents a study about impedance matching in a microwave device formed by the junction of waveguides. These transitions are characterized by a probe antenna that ensures the electromagnetic field coupling between waveguides of different geometries. The modeling for this antenna is based on the theory of the electrical transmission line. In this way, we estimate the input impedance of a conical antenna that feeds a coaxial waveguide. This theoretical approach allows obtaining the characteristic parameters, length and angle, of the conical antenna in a practical way. In order to validate the estimated parameters, we used COMSOL software to build the transition geometry and to simulate the waveguide device electrical response. The simulation results showed an improvement in the broadband response and impedance matching using a conical antenna as a field coupling probe inside the waveguide device.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131283453","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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