Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Antonio Luiz Pereira de Siqueira Campos"'
Autor:
Isaú de Sousa Silva Junior, Alfredo Gomes Neto, Maurício Weber Benjó da Silva, Antonio Luiz Pereira de Siqueira Campos
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 23, Iss 3 (2024)
Abstract This work proposes the integration of a monopole antenna with a frequency selective surface (FSS) with double square loop geometry, which operates in the ISM (2.4 - 2.4835 GHz) and IEEE 802.11 WLAN (5.15-5.725 GHz) bands. The FSS was develop
Externí odkaz:
https://doaj.org/article/283e99a3cc8847c4b560d613ee14e287
Autor:
Francisco Magno Monteiro Sobrinho, Isaac Barros Tavares Da Silva, Ruann Victor de Andrade Lira, Antonio Luiz Pereira de Siqueira Campos
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 23, Iss 3 (2024)
Abstract In this article, the authors propose changes to a microwave system for measuring the relative humidity of hollow concrete blocks presented in the literature, aiming to improve the system’s sensitivity. The operating frequency range was cha
Externí odkaz:
https://doaj.org/article/a7387b316ae842ecacaabea382bbd721
Autor:
Bruno Sátiro da Silva, Antonio Luiz Pereira de Siqueira Campos, Matheus Emanuel Tavares Sousa, Alfredo Gomes Neto, Humberto Dionísio de Andrade
Publikováno v:
IET Microwaves, Antennas & Propagation, Vol 16, Iss 8, Pp 519-525 (2022)
Abstract This paper presents a tri‐band complementary frequency selective surface (CFSS) with very closely spaced bands and angular stability. The proposed CFSS element geometry is composed of double concentric rings. The choice of this geometry is
Externí odkaz:
https://doaj.org/article/5dee5f363ebf48a8836973963e1c8e2f
Autor:
Felipe Ferreira de Araújo, Antonio Luiz Pereira de Siqueira Campos, Ruann Victor de Andrade Lira, Alfredo Gomes Neto, Adaildo Gomes d'Assunção
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 20, Iss 1, Pp 105-117 (2021)
Abstract In this article, bandwidth enhancement of a microstrip patch antenna using a new kind of metasurface is discussed. This new geometry is used to generate new resonances in antenna and with an optimal position of the metasurface in relation to
Externí odkaz:
https://doaj.org/article/64ddfc806d9649a7ad3ac1cba2830860
Autor:
Tiago dos Santos Bezerra, Antonio Luiz Pereira de Siqueira Campos, Ruann Victor de Andrade Lira, Alfredo Gomes Neto
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 19, Iss 4, Pp 510-521 (2020)
Abstract In this paper, the authors present a proposal for an application of electromagnetic bandgap (EBG), for suppression of grating lobes, in frequency selective surfaces (FSS), not yet studied in the literature. An alternative type of EBG with sq
Externí odkaz:
https://doaj.org/article/55bfcb113b524f1ba9dffe483a8a55f0
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 13, Iss 2, Pp 111-121 (2014)
Self-affine property of a modified multifractal Cantor geometry is exploited to design frequency selective surfaces (FSS) with multiband response. The main advantage of the proposed structure is to design multiband FSS with multiple frequency ratios
Externí odkaz:
https://doaj.org/article/e51cd2503bf04fc0898babfe6c8e7478
Autor:
Aderson Cleber Pifer, Carlo Frederico Pereira de Siqueira Campos, Antonio Luiz Pereira de Siqueira Campos
Publikováno v:
Holos, Vol 1, Iss 0, Pp 131-140 (2008)
Este trabalho descreve uma investigação da filtragem de diferentes tipos de sinais utilizando Wavelets, através do estudo empírico do nível de Threshold. Foram utilizados sinais senoidais padrão e sinais de voz. O ruído considerado neste estud
Externí odkaz:
https://doaj.org/article/64966c3556654f6c8eb2167863c9fad5
Autor:
Antonio Luiz Pereira de Siqueira Campos, Ricardo César de Oliveira Moreira, Lincoln Machado de Araújo
Publikováno v:
Holos, Vol 2, Iss 0, Pp 42-51 (2008)
Na literatura, podemos encontrar vários artigos que analisam as características das redes elétricas para transmissão de dados bem como as técnicas de comunicação empregadas para essa finalidade. Quase todos os artigos que estudam o padrão Hom
Externí odkaz:
https://doaj.org/article/5305eeb5ea1d42a6b461972f28f42ef5
Autor:
Antonio Luiz Pereira de Siqueira Campos, Augusto César Fialho Wanderley, Rafael Briani Biondi
Publikováno v:
Holos, Vol 2, Iss 0, Pp 31-41 (2008)
Trabalhos recentes têm estudado características do meio elétrico para a transmissão de dados, ruídos e técnicas empregadas na comunicação pela rede elétrica. A maioria dos trabalhos limita-se a fazer testes de desempenho do protocolo. Divers
Externí odkaz:
https://doaj.org/article/08cced577d7b443a807317fb3daa10b0
Autor:
Antonio Luiz Pereira de Siqueira Campos, Lincoln Machado de Araújo, Ricardo César de Oliveira Moreira
Publikováno v:
Holos, Vol 3, Iss 0, Pp 37-46 (2007)
Este estudo teórico e experimental teve por objetivo analisar o desempenho de uma rede de computadores, que utiliza o padrão Homeplug 1.0, no que diz respeito à taxa de transmissão de dados. Nesse trabalho, são estudadas as camadas: física e de
Externí odkaz:
https://doaj.org/article/05a3d40efbfa4352b6f1ccbfec2c8434