Zobrazeno 1 - 9 of 9 pro vyhledávání: '"E. M. F. de Oliveira"'
1
Akademický článek
Microstrip 3-Bit Fractal-based Phase Shifter
Autor: L. P. Pontes, E. M. F. de Oliveira, C. P. N. Silva, A. G. Barboza, M. T. de Melo, Ignacio Llamas-Garro
Publikováno v: Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 21, Iss 4, Pp 598-604 (2022)
Abstract This paper presents the implementation of a 3-bit microstrip fractal-based phase shifter operating in the 430 MHz to 470 MHz frequency range. The fractal structure is used to confine different delay line lengths in the same area due to the s
Externí odkaz: https://doaj.org/article/594ce12ed8eb4793850372e3d2b93498
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2
Akademický článek
Multiband FSS with Fractal Characteristic Based on Jerusalem Cross Geometry
Autor: H. V. H. Silva Filho, C. P. N. Silva, M. R. T. de Oliveira, E. M. F. de Oliveira, M. T. de Melo, T. R. de Sousa, A. Gomes Neto
Publikováno v: Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 16, Iss 4, Pp 932-941
Abstract This paper proposes a new Frequency Selective Surface (FSS) with modifications on the Jerusalem Cross (JC) geometry to provide a multiband response. Fractal levels are created by introducing concentric self-similar JC copies in the original
Externí odkaz: https://doaj.org/article/2851875ced114e2c9b79814b0b1a9ce6
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5
Reconfigurable Frequency Discriminator Based on Fractal Delay Line
Autor: Ignacio Llamas-Garro, M. R. T. de Oliveira, Crislane P. N. Silva, M. T. de Melo, G. J. Pinheiro, E. M. F. de Oliveira
Publikováno v: IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
Universitat Oberta de Catalunya (UOC)
A new compact reconfigurable frequency measurement device, based on interferometry is presented in this letter. The device combines the advantages of reconfigurability and fractal geometry. The interferometer uses a Wilkinson power divider connected
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::560e1a2ffbdffeb5d81d866eec23aa2f
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062937732&doi=10.1109/LMWC.2019.2892293&partnerID=40&md5=531a6e6b6838bb1d99d8fec4bfeb1eb0
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6
Design of a connector for fault detection in eye bolts used as insulator anchorages
Autor: Fabio N Fraga, L. M. da Silva, M. S. Coutinho, E. M. F. de Oliveira, V. L. Tarrago, Lauro R. G. S. Lourenco Novo, M. T. de Melo, H. V. H. Silva Filho
Publikováno v: Engineering Research Express. 2:045021
Eye bolts are part of a system used to anchor electrical insulators in substations and on transmission lines, connected by concrete structures. Structural failures in these devices may lead to service interruption, financial losses and risks for the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0cf77ba91a20014045aa1f1a454a23f2
https://doi.org/10.1088/2631-8695/abc9d0
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7
A Novel Method for Frequency Discriminators Construction based on Balanced Gray Code
Autor: M. T. de Melo, M. S. Coutinho, Ignacio Llamas-Garro, E. M. F. de Oliveira, T. L. Pedrosa
This paper discusses the use of multi-band-stop filters for application as frequency discriminators. A novel design method is presented (multi-band-stop filters based on the balanced gray code) and compared to the straightforward method (traditional
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2e856f671b199bf9d7aa9c032932afa
https://zenodo.org/record/431613
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8
Instantaneous Frequency Measurement Subsystem implementation using low-cost microcontroller
Autor: B. G. M. de Oliveira, T. L. Pedrosa, M. T. de Melo, M. R. T. de Oliveira, E. M. F. de Oliveira
Publikováno v: 2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC).
This paper presents a practical implementation of a S-Band 4-bit Digital Instantaneous Frequency Measurement Subsystem based on microstrip multibandstop filters. The outputs are converted using RF detectors and digitized using an Arduino® board. Fil
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0e5e07fbfcba6a1b8e672d0ccfd599d2
https://doi.org/10.1109/imoc.2015.7369041
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9
Microstrip 3-Bit Fractal-based Phase Shifter
Autor: L. P. Pontes, E. M. F. de Oliveira, C. P. N. Silva, A. G. Barboza, M. T. de Melo, Ignacio Llamas-Garro
Publikováno v: SciELO Brazil-OJS
Journal of Microwaves, Optoelectronics and Electromagnetic Applications v.21 n.4 2022
Journal of Microwaves. Optoelectronics and Electromagnetic Applications
Sociedade Brasileira de Microondas e Optoeletrônica (SBMO)
instacron:SBMO
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Volume: 21, Issue: 4, Pages: 598-604, Published: 28 NOV 2022
This paper presents the implementation of a 3-bit microstrip fractal-based phase shifter operating in the 430 MHz to 470 MHz frequency range. The fractal structure is used to confine different delay line lengths in the same area due to the space-fill
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ac6e50ff8bd46634de40ab5bcfa2c08
https://submission.scielo.br/index.php/jmoea/article/view/259521
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