Electromagnetic Filters
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Design and Implementation of Microwave Dual-Band Pass Interdigital Filter Using an Analytical Approach
Abstract In this paper, benefiting from frequency transformation between the normalized frequency domain of low-pass prototype frequencies and the real frequency domain of the filter, a purely analytical procedure for dual-band filter design is used. The coupling matrix of the filter is analytically extracted, without the need to perform numerical optimizati
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Theoretical Study of Plasmonically Induced Transparency Effect in Arrays of Graphene-Based Double Disk Resonators
Abstract In this paper, we consider coupled disk-shaped resonators separated by a thin dielectric substrate that can be used as frequency-tunable filters or as electromagnetic switches in the terahertz frequency band. The two disks are electromagnetically coupled and resonate with dipole plasmonic modes. By using a Temporal Coupled-Mode Theory based approach
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2019-03
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3. A Novel Design of an H-shaped Microstrip Diplexer
Abstract In this paper, a new microstrip diplexer using modified H-shaped resonators with a compact size and high isolation is presented. This circuit is designed for the ISM band at 2.4 GHz and GPS at 1.575 GHz. The proposed diplexer is formed by connecting two band-pass filters designed by using the modified H-shaped resonator and tapped microstrip Input/o
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-12
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4. Electromagnetic interference reduction by dynamic impedance balancing applied to biosensors
INTRODUCTION: Electromagnetic interference caused by electric power lines adversely affects the signals of electronic instruments, especially those with low amplitude levels. This type of interference is known as common-mode interference. There are many methods and architectures used to minimize the influence of this kind of interference on electronic instru
Rev. Bras. Eng. Bioméd.. Publicado em: 2013-09
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5. Estratégia para estimação do conjugado eletromagnético de motores de indução / STRATEGY FOR THE ESTIMATION OF TORQUE ELECTROMAGNETIC INDUCTION MOTORS
The purpose of this work is to develop a strategy for determining the electromagnetic torque of induction motors (MIT) from the stator flux estimation, which presents higher robustness against parametric variations. The stator flux is estimated by integrating the voltage model of the machine, applying Highpass Filters (HFP) for ideal integration of electromo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/05/2011
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6. Estudo de viabilidade de integração de micro-lâmpadas incandescentes com filtros interferenciais. / Study of viability of integration of incandescent micro-lamps with interferometric filters.
In the present work was realized a study of the viability of integrating two optical devices: incandescent micro-lamps and interferometric filters with the intention of obtaining a single device with specific characteristics. The fabrication of these optical devices was made using dielectric materials, obtained by plasma-enhanced chemical vapor deposition (P
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/04/2011
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7. Statistical modeling of manufacturing uncertainties for microstrip filters
This work presents a technique to characterize the errors that occur in the process of manufacturing into electromagnetic simulations of microwave devices. The procedure combines the unscented transform (UT) with simulations. The use of the UT allows efficient use of computational resources for the characterization of the random variables modeling the uncert
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2011-06
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8. Aplication of unscented transformed (ut) for design filters microwave / Aplicação da transformada de incerteza (ut) para projeto de filtros de microondas
The manufacture of complex filters and their tests depend on electromagnetic simulation for validation and correct analysis. However, in the filter assembly, the fabrication process introduces new sources of uncertainty that are difficult to model with the electromagnetic simulator. The result may be significant differences between the simulated responses an
Publicado em: 2010
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9. Projeto de filtros para atenuação de correntes de modo comum e de sobretensões em acionamentos de motores elétricos utilizando inversores PWM
The use of inverters in most of electrical motor drives applications has been accompanie by several undesirable effects, such as overvoltage at the motor terminals, circulation of common mode currents and electromagnetic interference problems. The determining factors for most of these problems come with the high switching speed and frequency of the semicondu
Publicado em: 2010
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10. Análise teórica e experimental de superfícies seletivas de freqüência e suas aplicações em antenas planares
This work presents a theoretical and numerical analysis of structures using frequency selective surfaces applied on patch antennas. The FDTD method is used to determine the time domain reflected fields. Applications of frequency selective surfaces and patch antennas cover a wide area of telecommunications, especially mobile communications, filters and WB ant
Publicado em: 2009
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11. Avaliação de filtros eletromagnéticos e sintonizados LC para minimização de correntes de seqüência zero em sistemas de distribuição a quatro fios
A qualidade da energia elétrica se apresenta como uma área de grande interesse para os consumidores e concessionárias de energia elétrica. O aumento deste interesse é explicado pelo aprimoramento da legislação pertinente a esta área e ao nível de esclarecimento dos consumidores, cada vez mais conscientes de seus direitos. Em se tratando do tema qual
Publicado em: 2007
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12. AvaliaÃÃo de filtros eletromagnÃticos e sintonizados LC para minimizaÃÃo de correntes de seqÃÃncia zero em sistemas de distribuiÃÃo a quatro fios
A qualidade da energia elÃtrica se apresenta como uma Ãrea de grande interesse para os consumidores e concessionÃrias de energia elÃtrica. O aumento deste interesse à explicado pelo aprimoramento da legislaÃÃo pertinente a esta Ãrea e ao nÃvel de esclarecimento dos consumidores, cada vez mais conscientes de seus direitos. Em se tratando do tema qual
Publicado em: 2007