Zobrazeno 1 - 10
of 76
pro vyhledávání: '"M.C.R. Carvalho"'
Publikováno v:
Microwave and Optical Technology Letters. 53:2418-2422
Experimental characterization of the dielectric properties of a SrTiO3 (STO) thin film in the microwave frequency range at room temperature is presented. The coplanar waveguide linear resonator technique, which is already well-established for thick f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9de3b7b8ab16222093895b988bd7a6c0
https://doi.org/10.1002/mop.26233
https://doi.org/10.1002/mop.26233
Publikováno v:
Microwave and Optical Technology Letters. 52:2339-2344
A technique for the characterization of microwave dielectric properties of high dielectric constant thick films at room temperature is proposed, using multilayered coplanar waveguide transmission lines with high dielectric constant thick films deposi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84a217672623c3669715e0a0ec044cd3
https://doi.org/10.1002/mop.25440
https://doi.org/10.1002/mop.25440
Publikováno v:
Microwave and Optical Technology Letters. 52:1337-1340
This article describes the complete experimental characterization of a 10-mm long planar transmission-line transformer (TLT) in a multilayered high dielectric constant film structure. The multilayered configuration was obtained by deposition of a hig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52d728e3f77c87d1f8191a8069d15b80
https://doi.org/10.1002/mop.25154
https://doi.org/10.1002/mop.25154
Autor:
Walter Margulis, M.C.R. Carvalho, Luiz Fernando M. Conrado, Rodolfo A. A. Lima, Luciene S. Demenicis
Publikováno v:
Microwave and Optical Technology Letters. 49:521-524
A CPW linear resonator method for the microwave characterization of high dielectric constant films
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11d67fb6cf897a68f15cb5a60e120f5f
https://doi.org/10.1002/mop.22176
https://doi.org/10.1002/mop.22176
Autor:
M.C.R. Carvalho, Rodolfo A. A. Lima, Maria Thereza M. Rocco Giraldi, Rafael de Oliveira Ribeiro, Maria José Pontes
Publikováno v:
Microwave and Optical Technology Letters. 49:1541-1544
The time response of a semiconductor optical amplifier wavelength converter based on the ASE-XGM technique was experimentally obtained using ultra-short pump optical pulses. The results were compared with the pump & probe technique and show similar t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72fb5bf73ed5af3b1aac021e261676fe
https://doi.org/10.1002/mop.22492
https://doi.org/10.1002/mop.22492
Publikováno v:
Microwave and Optical Technology Letters. 47:290-293
In this paper, we propose a planar transmission-line impedance transformer (TLT) with a multilayered configuration obtained by deposition of high-dielectric-constant thin films over the conductors printed on conventional bulk substrates. The resultin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17ae663109d929c62be9cb7d6c53664d
https://doi.org/10.1002/mop.21149
https://doi.org/10.1002/mop.21149
Publikováno v:
Microwave and Optical Technology Letters. 37:174-177
Transmission-line transformers with different impedance variation patterns and printed on substrates with very high dielectric constant (er = 80) are compared and the influence of the total length is studied. The propagation characteristics of the ta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::450da664f07562ea03aac99680f2798d
https://doi.org/10.1002/mop.10859
https://doi.org/10.1002/mop.10859
Publikováno v:
Microwave and Optical Technology Letters. 32:275-278
The propagation characteristics of enclosed microstrip-slot and coplanar waveguide-slot lines printed on substrates with a very high dielectric constant (er=40, er=80, and er=100, respectively) are investigated for a wide range of geometric parameter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ad88f04a939f92265dc4b8c3b9f8fe0
https://doi.org/10.1002/mop.10152
https://doi.org/10.1002/mop.10152
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 50:13-16
A security system for optical communication signals based on Bragg grating structures is presented in this paper. The technique can be implemented in different levels of sophistication with corresponding cost and technical difficulty. The technique i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d81c78af19f5ef8052d0d7a633e5dfc
https://doi.org/10.1109/22.981237
https://doi.org/10.1109/22.981237
Publikováno v:
Revista Brasileira de Educação n.16 2001
Revista Brasileira de Educação
Associação Nacional de Pós-Graduação e Pesquisa em Educação (ANPEd)
instacron:EAA
Revista Brasileira de Educação, Iss 16, Pp 35-47 (2001)
Revista Brasileira de Educação
Associação Nacional de Pós-Graduação e Pesquisa em Educação (ANPEd)
instacron:EAA
Revista Brasileira de Educação, Iss 16, Pp 35-47 (2001)
In this paper it is discussed conceptual aspects of early childhood education and the evolution of the 0 to 6 years old cohort of the population through the analysis of the enrolment and participation in early childhood education programs of this gro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf5aa7aa98a1be517140fdb977f9fdb6
https://doi.org/10.1590/s1413-24782001000100005
https://doi.org/10.1590/s1413-24782001000100005