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检索条件"机构=Post-Graduation Program in Electrical Engineering"

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Analytical modeling for the characterization of on-chip spiral inductor in 0.13 μm 3

Analytical modeling for the characterization of on-chip spir...

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3rd International Symposium on Instrumentation Systems, Circuits and Transducers: Chip in the Pampa, INSCIT 2018

作者： Bernardo, Marcos Gomes Raimundo Freire, C.S. De Souza, Antonio Augusto L. Erico Melo, C.A. Post-Graduation Program in Electrical Engineering PPgEE/UFCG Brazil Federal University of Campina Grande UFCG Campina Grande Brazil Federal University of Paraiba UFPB Joao Pessoa Brazil

ISBN: (纸本)9781538672983

In this paper, we present the modeling for a rapid characterization of integrated spiral inductors. Closed-form has been used to estimate the parameters of the equivalent circuit, which are calculated as a function of the parameters of the inductor physical design. The double-$\pi$ equivalent circuit was adopted to model the physical phenomena resulting from electromagnetic coupling and high-frequency operation. The method for calculating the oxide capacitance has included the contribution of the fringing electric fields for better prediction of the inductor characteristics. In order to verify the performed modeling, a set of octagonal on-chip spiral inductors with different geometries were simulated in the Momentum ADS and the main figures of merit of the inductor were compared. The mean error between the model and EM simulation was 3.6% for the DC inductance, 7.7% for the maximum value of the quality factor and 1.3% for the self-resonance frequency. © 2018 IEEE.

关键词： Equivalent circuits

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Flexible UHF RFID Tag for Human Body Motion Detection

Flexible UHF RFID Tag for Human Body Motion Detection

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IEEE MTT-S Latin America Microwave Conference (LAMC)

作者： Samuel Medeiros Araújo Morais Jéssyca Iasmyn Lucena Araujo Alexandre Jean René Serres Camila Caroline Rodrigues de Albuquerque Maraiza Prescila dos Santos Joabson Nogueira de Carvalho Post-Graduation Program in Electrical Engineering Federal University of Campina Grande Campina Grande Brazil Post-Graduation Program in Electrical Engineering Federal Institute of Paraíıba João Pessoa Brazil

ISBN: (纸本)9781538673348;9781538673331

With the growing diffusion of the Internet of Things concept and the advances in low-power electronics, the RFID (Radio Frequency Identification) technology has gained attention in various fields, from entertainment to medicine, for example. Its sensing and signal processing capability allows us to highlight this technology as one of the main solutions in reducing cost and complexity in such applications. This work presents the design and test of a flexible RFID tag operating in the American UHF frequency of 915 MHz, for human body motion detection. Through the analysis of the Received Signal Strength Indicator (RSSI) variation with time and its Fast Fourier Transform (FFT) it was possible to ensure the tag's applicability.

关键词： Antennas Antenna measurements Resonant frequency RFID tags Geometry

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Aperture-Coupled Koch Fractal on-Chip Antennas for 60 GHz ISM Band

Aperture-Coupled Koch Fractal on-Chip Antennas for 60 GHz IS...

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IEEE MTT-S Latin America Microwave Conference (LAMC)

作者： Samuel Medeiros Araújo Morais Alexandre Jean René Serres Ivana Soares Guarany Raimundo Carlos da Silverio Freire Paulo Fernandes da Silva Ewaldo Elder Carvalho Santana Paulo Henrique da Fonseca Silva Post-Graduation Program in Electrical Engineering Federal University of Campina Grande Campina Grande Brazil Post-Graduation Program in Computer Engineering and Systems State University of Maranhão São Luis Brazil Post-Graduation Program in Electrical Engineering Federal Institute of Education Science and Technology of Paraíba João Pessoa Brazil

ISBN: (纸本)9781538673348;9781538673331

This paper presents Koch fractal aperture-coupled patch antennas operating in industrial scientific and medical band at 60 GHz (57 GHz to 64 GHz), for on-chip application. This work is the continuation of the development of aperture-coupled antennas with aperture and patch element built in 2 μm-thick aluminum lying on two layers of silicon with a height of 200 μm. The use of Koch fractal allowed the development of aperture-coupled antennas of greater perimeter with more metal in the patch elements, which promoted an increase in the gain. The observed gain for Koch fractal level 2 was of 10.55 dBi, with a bandwidth of 7.23 GHz, covering the ISM 60 GHz Band, and an increase of less than 10% in total patch dimension. For Koch fractal levels 0 (square), a polarization close to circular was achieved, with an axial ratio less than 6 at resonant frequencies.

关键词： Fractals Patch antennas Resonant frequency Aperture antennas Bandwidth Gain

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Aperture-coupled on-chip patch antennas for ISM band 60 GHz 2

Aperture-coupled on-chip patch antennas for ISM band 60 GHz

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2nd International Symposium on Instrumentation Systems, Circuits and Transducers, INSCIT 2017

作者： Bernardo, Marcos Gomes Carlos Da Silva Veria Freire, Raimundo De Queiroz, Anyelle Keila Farias Araujo, Jessyca Iasmyn Lucena Morais, Samuel Medeiros Araujo Serres, Alexandre Jean Rene Fernandes Da Silva, Paulo Post-Graduation Program in Electrical Engineering Federal University of Campina Grande Campina Grande Brazil

ISBN: (纸本)9781538620212

This paper presents the development of aperture-coupled patch antennas operating in industrial scientific and medical band at 60 GHz (57 GHZ to 64 GHz), with square and circular shapes, for on-chip application. The aperture-coupled antenna proposed is composed by a transmission feed line, an aperture and patch element built in aluminum with 10 micrometers of thickness lying on two layers of silicon with height of 200 micrometers. Dimensions of the square and circular antennas were calculated according to the effective wavelength for resonance frequency at 60 GHz in order to match at 50 Ohms. The proposed antennas have been simulated using the commercial software ANSYS. Both antennas show omnidirectional radiation pattern, with half power beamwidth greater than 149 degrees. Square patch presented a more compact structure, with dimension less than 1.55 mm, return loss of-55 dB, and bandwidth of 3.98 GHz, however the circular antenna, with a greater metallic area, achieved a better gain of 5.88 dBi. © 2017 IEEE.

关键词： Micrometers

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Gain and offset calibration for an Analog-to-Information Converter

Gain and offset calibration for an Analog-to-Information Con...

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International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)

作者： Bruno W.S. Arruda Raimundo C.S. Freire Edmar C. Gurjão Verônica M.L. Silva Luis F.N.M. Torres Vanderson L. Reis Newton S.S.M. Fonseca Post-Graduation Program in Electrical Engineering - COPELE Federal University of Campina Grande Campina Grande PB Brazil CDMI - IFAM Manaus AM Brazil

Analog-to-information converters (AIC) are physical implementations of Compressed Sensing that have been proposed to overcome the technological limitations of the analog-to-digital converters (ADC) in terms of bandwidth and quantity of data produced after conversion. The AIC hardware suffers from non-idealities of components and subsystems, which reduces the quality of the measured signal reconstruction. Such effects can be compensated by calibration that normally have been implemented in the signal recovery methods. In this paper, we analyze a calibration method for AIC that takes into account only the measurements produced by the AIC. Results show that the hardware calibration improves the signal reconstruction with regard to signal-to-noise and distortion ratio (SINAD), independent of the reconstruction algorithm.

关键词： Calibration Hardware Distortion measurement Mathematical model Compressed sensing Reconstruction algorithms Measurement uncertainty

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Parametric Analysis of Iterated Game Environments as Social Interaction Model for Genetic Algorithm to Solve Constrained engineering Problems

Parametric Analysis of Iterated Game Environments as Social ...

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Congress on Evolutionary Computation

作者： Rodrigo Lisbôa Pereira Marco A. Florenzano Mollinetti Mário Tasso Ribeiro Serra Neto Adilson de Almeida Neto Daniel Leal Souza Edson Koiti Yasojima Otávio Noura Teixeira Roberto Célio Limão de Oliveira Federal Rural University of Amazon (UFRA) Federal University of Pará (UFPA) Pará Brazil Systems Optimization Laboratory Tsukuba University Tsukuba Ibaraki Japan University Centre of the State of Pará (CESUPA) Belém Pará Brazil Electrical Engineering Post Graduation Program Federal University of Pará (UFPA) Belém Pará Brazil Electrical Engineering Post Graduation Program Federal University of Pará (UFPA) Pará Brazil Computer Engineering Post Graduation Program Federal University of Pará (UFPA) Pará Brazil Laboratory of Bionspired Computing (LCBIO) Federal University of Pará (UFPA) Belém Pará Brazil

This article presents a parameter study on the applied game theory in Genetic Algorithm (GA), performing an analysis of the game Prisoner's Dilemma applied in the solution of four constrained engineering problems. Simulations were applied in four different variations of the game, in order to find the best configuration for the analyzed problems. Then, after obtaining the best configuration of the game, we performed an analysis of the incidence of Alpha and Beta weights, present in GA fitness with Social Interaction, using the game that best suited each problem, employing sixteen different weight configurations. At end, the results obtained authenticated the influence of the Social Interaction process in the essence of GA.

关键词： Genetic algorithms Games Game theory Optimization Biological cells Sociology Statistics

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Estimation of Angular Speed and Park Matrix from Resolver Position Sensor Signals without Using Trigonometric Functions

Estimation of Angular Speed and Park Matrix from Resolver Po...

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IEEE International Congress on Electronics, electrical engineering and Computing (INTERCON)

作者： Raymundo Cordero García João Onofre Pereira Pinto Alex Butinhol Belini Department of Electrical Engineering Federal University of Mato Grosso do Sul Mato Grosso do Sul Brazil Post-Graduation Program in Electrical Engineering Federal University of Mato Grosso do Sul Mato Grosso do Sul Brazil

Resolver is an angular position sensor widely used in electric/hybrid vehicles and robotics. However, estimating the angular position and speed from resolver outputs is as difficult task. Most algorithms in literature use trigonometric functions to estimate the angular position. However, these functions are difficult to implement, especially in FPGAs. On the other hand, in speed vector control of three-phase motors, the angular position is only used to estimate the mechanical speed and Park transformation matrix. This paper presents a simple technique to get the mechanical speed and Park matrix without calculating trigonometric functions and without estimating directly the angular position. Filtering and synchronous demodulation allows obtaining the sine and cosine of the angular position, while the compensation of the delay produced by filtering and the estimation of the Park matrix are done using simple trigonometric properties and taking advantage that the number of pole pairs is an integer number. Experimental results show the accuracy of the proposed approach.

关键词： Signal resolution Estimation Delays Band-pass filters Synchronous motors Frequency estimation

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Design and analysis of a bidirectional battery charger 8

Design and analysis of a bidirectional battery charger

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8th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2017

作者： Carvalho, Edivan Laercio Carati, Emerson Giovani Da Costa, Jean Patric De Oliveira Stein, Carlos Marcelo Cardoso, Rafael Federal University of Technology-Paraná-UTFPR Post-Graduation Program in Electrical Engineering-PPGEE Static Power Converters Engineering Research Group-ECEE Pato Branco-PR Brazil

ISBN: (纸本)9781509053384

This work proposes the design and analysis of a bidirectional and isolated battery charger for applications that involve energy storage like UPS or hybrid generation systems. Bidirectional characteristic is fundamental to allow the charge and discharge of batteries in a single equipment, reducing the number of systems and volume in applications that involve energy storage. In addition, the proposed converter provides low voltage and current ripple that are important to reduce electromagnetic interference and to improve the battery life cycle, as well as reducing semiconductors requirements. © 2017 IEEE.

关键词： Charging (batteries)

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CEMCO: A Novel Competitive Evolutionary Multi-Colony Optimization Algorithm for Constrained Problems

CEMCO: A Novel Competitive Evolutionary Multi-Colony Optimiz...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Mário Tasso Ribeiro Serra Neto Marco Antônio Florenzano Mollinetti Demison Rolins de Souza Alves Rodrigo Lisbôa Pereira Otávio Noura Teixeira University Centre of the State of Pará (CESUPA) Computational Intelligence Laboratory (LINCOMP) Belém Pará Brazil Systems Optimization Laboratory Tsukuba University Tsukuba Ibaraki Japan Federal Rural University of Amazon (UFRA) Electrical Engineering Post Graduation Program of the Federal University of Par (UFPA) Paragominas Pará Brazil Applied Computing Post Graduation Program (PPCA) Federal University of Pará Tucuruí (UFPA-TUC) Tucuruí Pará Brazil

ISBN: (纸本)9781538680988;9781538680971

The following paper presents a hybrid Swarm Intelligence algorithm, named Competitive Evolutionary Multi-Colony Optimization (CEMCO). CEMCO is based on the well-known bee inspired algorithm Artificial Bee Colony (ABC), introducing Evolutionary Strategies (ES)under a parallel master-slave architecture utilizing the General Purpose Computing on Graphics Processing Units (GPGPU)paradigm. The goal of this approach is to enhance the overall performance of the master algorithm, producing high quality solutions, and significant solutions under a reduced processing time. Performance evaluation of CEMCO is performed by two large scale constrained optimization problems: Design of Pressure Vessel (DPV)and Welded Beam Design (WBD). Results obtained are compared against prominent techniques found in the literature.

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Intelligent Handover Procedure for Heterogeneous LTE Networks using Fuzzy logic

Intelligent Handover Procedure for Heterogeneous LTE Network...

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International Wireless Communications and Mobile Computing Conference

作者： Evelin Cardoso Ketyllen Silva Renato Francês Post-Graduation Program in Electrical Engineering Federal University of Pará Belem Brazil

ISBN: (纸本)9781509043736

Heterogeneous mobile networks are already a reality and their densification has been put forward as one of the suggested solutions to meet the expected demands for 5th generation (5G) mobile networks. However, in the current networks, it is still common for fixed parameters to be used for the configuration of the network although this strategy does not always prove to be efficient. It is within this context that the concept of self-organizing networks (SONs) has been established, in which several network parameters are automatically adjusted on the basis of measurements and intelligent systems in real time. This paper sets out a methodology for an intelligent handover decision in heterogeneous LTE networks based on measurements and Fuzzy logic. The results showed that the proposed algorithm is efficient and can assist in the self-organization of the network.

关键词： Heterogeneous LTE Network Self-organizing networks Handover Fuzzy Logic

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