Zobrazeno 1 - 10
of 32
pro vyhledávání: '"L. M. Tomaz"'
Publikováno v:
Radio Science. 58
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4f60b4dd1d6c2fb391d19922a8979de
https://doi.org/10.1029/2022rs007551
https://doi.org/10.1029/2022rs007551
In satellite links, the variations in the elevation angle have a strong impact on the magnitude of the attenuation induced by rain because the path-length across precipitation increases with the decrease in the elevation. In particular, it is definit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7a9b46762643f5d76375a79afc41cbe
http://hdl.handle.net/11311/1119487
http://hdl.handle.net/11311/1119487
Autor:
Marcio Matias Afonso, Sandro T. M. Goncalves, Christian Vollaire, Eduardo Henrique da Rocha Coppoli, Ursula C. Resende, L. M. Tomaz
Publikováno v:
International Journal of Applied Electromagnetics and Mechanics
International Journal of Applied Electromagnetics and Mechanics, IOS Press 2016, 51 (s1), pp.S75-S80. ⟨10.3233/JAE-2008⟩
International Journal of Applied Electromagnetics and Mechanics, IOS Press 2016, 51 (s1), pp.S75-S80. ⟨10.3233/JAE-2008⟩
International audience; The Ultra Wideband (UWB) technology is promising for data communications over short distances at high data rates. Since the antenna design is critical in the development of UWB systems, this paper proposes a new geometry for a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd9f7ecf5c914ef41c308c6066a0cc44
https://doi.org/10.3233/jae-2008
https://doi.org/10.3233/jae-2008
The effect of the attenuation due to rain in satellite links increases rapidly for frequencies above 10 GHz. The development of tools to mitigate this impairment relies on the good knowledge on the behavior of the rain attenuation, and in particular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b760144131815ceef9a26eace8c3f33
http://hdl.handle.net/11311/1119450
http://hdl.handle.net/11311/1119450
Autor:
Carlo Capsoni, L. M. Tomaz
Publikováno v:
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC).
The attenuation due to rain is the main source of impairments in satellite links operating above 10 GHz. In the design of systems based on Low Earth Orbit (LEO) satellites, the analysis of the rain attenuation must take into account both azimuth and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e1fbc417e7d1dbf322baae79cffead0
https://doi.org/10.1109/imoc.2017.8121056
https://doi.org/10.1109/imoc.2017.8121056
Autor:
A.A. Silva, L. M. Tomaz
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 77:161-166
Atmospheric ozone remains an important topic especially because of global climate change. In this study, total ozone column (TOC) measurements by a Microtops II (MII) ozone monitor at an urban, tropical site in Brazil are considered with local cloud
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae051be34779224f2597b998be372ecd
https://doi.org/10.1016/j.jastp.2011.12.014
https://doi.org/10.1016/j.jastp.2011.12.014
Autor:
Christian Vollaire, Marcio Matias Afonso, Sandro T. M. Goncalves, Ursula C. Resende, L. M. Tomaz, Ludmila Rodrigues Milagre
The Ultra Wideband (UWB) technology is a promising way to integrate data communications over short distances and at higher data rates. It is known that the design of the antenna is critical in the development of UWB systems. This paper proposes a new
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4dc8d1aab1d9b057cd40480453a6129
http://hdl.handle.net/11311/1063181
http://hdl.handle.net/11311/1063181
Autor:
Marcelo J. P. da Silva, Sandro T. M. Goncalves, Wagner C. Soares, L. M. Tomaz, Ursula C. Resende
Publikováno v:
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC).
The architecture of a low-complexity ultra wideband (UWB) impulse radio (IR) transmitter and receiver circuit, aimed for low-cost applications is presented. To project a simple and commercially available circuit, low-cost discrete components were use
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a2e349f7dbc3e7fecb7cf1d9b19d89e
https://doi.org/10.1109/imoc.2013.6646558
https://doi.org/10.1109/imoc.2013.6646558
Autor:
L. M. Tomaz, Abel Antônio Silva
Surface ozone plays a key role in the photochemistry of the low troposphere, being associated with health and environmental problems. It results from a pool of reactions involving natural and anthropogenic pollutants, solar radiation, and the atmosph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::450f8a39de3fe8de3b363424b2456282
http://hdl.handle.net/11311/1063183
http://hdl.handle.net/11311/1063183
Autor:
Onyango, Laura A., Jiawei Liang
Publikováno v:
Frontiers in Cellular & Infection Microbiology; 2024, p01-23, 23p