Zobrazeno 1 - 10 of 14 pro vyhledávání: '"M. A. T. de Oliveira"'
1
Multi-band microwave sensor based on Hilbert’s fractal for dielectric solid material characterization
Autor: M. R. T. de Oliveira, Ignacio Llamas-Garro, M. S. Coutinho, J. A. I. Araujo, C. P. do N. Silva, M. T. de Melo
Publikováno v: Journal of Electromagnetic Waves and Applications. 35:848-860
A planar sensor designed using the fourth Hilbert fractal curve iteration for solid material characterization at multiple frequencies is reported in this paper. The fractal curve is self-similar with space filling properties. The Hilbert fractal geom
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b991914e01a10c70e4e17f31884f48e9
https://doi.org/10.1080/09205071.2020.1861992
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5
A New Trapezium FSS Superstrate for Antenna Gain Enhancement
Autor: M. T. de Melo, J. A. I. Araujo, M. R. T. de Oliveira, P. H. B. Cavalcanti Filho, Francisco Ariaildo C. S. Lucena, Ignacio Llamas-Garro, Crislane P. N. Silva, B. A. Kleinau
Publikováno v: 2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC).
In this paper, a new frequency selective surface (FSS) for antenna gain enhancement is proposed. The antenna and FSS have an isosceles trapezium geometry. Three different versions of an antenna are created. For each version, the S-parameters S11 and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::649cf9c85cebc95d4128b2f3bf20560b
https://doi.org/10.1109/imoc43827.2019.9317589
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6
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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7
Controlled directivity and gain of antenna using square loop RFSS based on PIN diode
Autor: Francisco Ariaildo C. S. Lucena, T. L. Pedrosa, M. R. T. de Oliveira, M. T. de Melo, Crislane P. N. Silva
Publikováno v: 2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC).
This paper presents a microstrip antenna with controlled gain and directivity. The gain control of antenna is achieved by employing a Reconfigurable Frequency Selective Surface (RFSS) as superstrate which is formed by 2 × 2 array of square loops. Th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fd91fac371acbe1718717544316cc0e1
https://doi.org/10.1109/imoc.2017.8121083
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9
Recent Trends and Considerations for High Speed Data in Chips and System Interconnects
Autor: Reydezel Torres-Torres, Ignacio Llamas-Garro, Dejan Vukobratovic, Josep M. Fabrega, M. R. T. de Oliveira, Michela Svaluto Moreolo, M. T. de Melo, Benjamin Carrion Schafer, Joan Bas, Jung-Mu Kim
This paper discusses key issues related to the design of large processing volume chip architectures and high speed system interconnects. Design methodologies and techniques are discussed, where recent trends and considerations are highlighted.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::023e7969bf50916c7faf9eceef704ed2
https://zenodo.org/record/162146
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10
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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