Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Adaildo Gomes d'Assunção"'
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 23, Iss 1 (2024)
Abstract This paper presents a study on Active Frenquency Selective Surface (AFSS) for applications in modern wireless communication systems. Initially, an FSS with an element inspired by convoluted metallic lines printed on a dielectric substrate of
Externí odkaz:
https://doaj.org/article/22a5e2ff6d1d4a03bd0ccdeb9b2bfdeb
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 21, Iss 3, Pp 445-452 (2022)
Abstract Based on 2.5-Dimensional (2.5D) frequency selective surface (FSS) structures, a new miniaturized frequency selective surface structure is proposed in this work to operate as a bandreject filter in the 2.4 GHz (2400 to 2483.5 MHz) and 5 GHz (
Externí odkaz:
https://doaj.org/article/377e2fc511774d2bb71296c7a9359cc7
Autor:
Maria Elizabeth Teixeira Santana Praxedes, José Garibaldi Duarte Júnior, Erica Natasche de Medeiros Gurgel Pinto, Valdemir Praxedes Silva Neto, Kleber Cavalcanti Cabral, Adaildo Gomes d'Assunção
Publikováno v:
PLoS ONE, Vol 18, Iss 12, p e0295188 (2023)
With the increasing use of traditional and new models of wireless communication systems, the study and determination of the electrical characteristics of materials used in civil construction is an important topic to establish an understanding of how
Externí odkaz:
https://doaj.org/article/3178b0391f27412ea7ac98c503192566
Publikováno v:
PLoS ONE, Vol 18, Iss 9 (2023)
This work presents the development of a bandstop filter with a tunable response. Varactor diodes are used as control elements. Studies and investigations demonstrate the influence of the variable capacitance on the input admittance and on the S-param
Externí odkaz:
https://doaj.org/article/7f3b3ed7b7ef414c9c23f43382c81f0c
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:
Augusto César Rebouças de Brito, Antonio Salvio de Abreu, Adaildo Gomes D'Assunção, Custódio Peixeiro
Publikováno v:
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Vol 19, Iss 3, Pp 309-326 (2020)
Abstract This paper describes the analysis of the effects of a frequency selective surface (FSS) on the characteristics of a microstrip line fed antenna with a bow-tie slot in the ground plane for operation in the frequency range 1 to 10 GHz. The use
Externí odkaz:
https://doaj.org/article/02e6f3a028c6490bb525210392b42b7d
Autor:
Rudrigo Rangel Lima, Sávio Murillo Dias Bastos, Adaildo Gomes D’Assunção Junior, Lincoln Machado de Araújo, Gustavo Araujo Cavalcante
Publikováno v:
Revista Principia, Vol 1, Iss 51, Pp 214-225 (2020)
Este artigo propõe o desenvolvimento de antenas têxteis para aplicações em sistemas de identificação por radiofrequência (RFID). O tecido jeans, comercialmente vendido, foi utilizado como substrato dielétrico, e como condutor, um tecido de po
Externí odkaz:
https://doaj.org/article/83686cd364144a6ead8262e24678ea1a
Autor:
Adan Miller Agostinho Pereira, Nierember José Pereira Lyra Ramos, Thiago Pierre Mota de Alencar, Suzete Élida Nóbrega Correia, Michel Coura Dias, Adaildo Gomes D’Assunção Júnior
Publikováno v:
Revista Principia, Vol 0, Iss 22, Pp 98-106 (2013)
O estado atual das tecnologias IP e seus respectivos dispositivos permite estabelecer uma solução de telefonia que agregue as vantagens de oferecer novos serviços, aproveitar a infraestrutura de rede existente e reduzir o custo por chamada telefô
Externí odkaz:
https://doaj.org/article/e7749c146d804d349edba1c44245a046
Autor:
Jéssica Mota Vieira, Ewerton da Silva Farias, Patric Lacouth da Silva, Adaildo Gomes D'Assunção Junior
Publikováno v:
Revista Principia, Vol 0, Iss 22, Pp 23-27 (2013)
Este artigo analisa uma das possíveis aplicações do uso da tecnologia de identificação por radiofrequência, ou RFID, e uns diversos benefícios que ele pode proporcionar. O objetivo inicial deste trabalho é verificar a possibilidade de utiliza
Externí odkaz:
https://doaj.org/article/e06d40ccf74d4aefa53503ef823be812
Autor:
Gustavo Araújo Cavalcante, Diego Ramalho Minervino, Adaildo Gomes D'Assunção Junior, Adaildo Gomes D'Assunção
Publikováno v:
The Journal of Engineering (2015)
A band stop filter developed on a denim textile substrate is presented. The filter geometry is composed of interconnected half-wavelength parallel coupled resonators, in a novel microstrip filter configuration. Simulated results were obtained through
Externí odkaz:
https://doaj.org/article/a9dc5728d896459a8b3154457db45430