Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Fahad Alyafei"'
Autor:
Mae Almansoori, Ernesto Neira, Sebastien Lallechere, Chaouki Kasmi, Felix Vega, Fahad Alyafei
Publikováno v:
IEEE Access, Vol 8, Pp 205022-205033 (2020)
The performances of Vircators have been reported in different studies showing that a high discrepancy between the simulated and measured output peak power and radiating frequency can be encountered. Limited investigations have been reported where the
Externí odkaz:
https://doaj.org/article/3a144f5564e649d78641dc8e7643edfc
Publikováno v:
IEEE Transactions on Antennas and Propagation. 69:715-722
In this article, we introduce the tapered impedance half-impulse radiating antenna (TI-HIRA). This innovative version of the HIRA allows the direct connection of COTS, $50~\Omega $ generators to the antenna, without requiring external transformers an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ccd57f9764e0b327fd2196705aeaad3
https://doi.org/10.1109/tap.2020.3016496
https://doi.org/10.1109/tap.2020.3016496
Publikováno v:
IEEE Transactions on Plasma Science. 48:3822-3826
In this article, the power capabilities of the axially extracted virtual cathode oscillator are determined by analytical means. The used methodology comprises two stages. First, power limits are established by mathematical optimization of a Vircator
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a873bcfa470c076e21547e3a60b1ad40
https://doi.org/10.1109/tps.2020.3026706
https://doi.org/10.1109/tps.2020.3026706
Publikováno v:
2020 IEEE 21st International Conference on Vacuum Electronics (IVEC).
Maximum power that can be radiated by an Axially Extracted Vircators is calculated using a mathematical model. The established limits are compared against the results of experiments and simulations available in the literature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de4b881e4b3d2854a278f349b4a92599
https://doi.org/10.1109/ivec45766.2020.9520518
https://doi.org/10.1109/ivec45766.2020.9520518
Publikováno v:
Web of Science
This paper presents a novel design for a microwave applicator for hyperthermia applications, based on the combination of two flat dielectric graded-index (GRIN) lenses. The proposed system is a suitable alternative to conventional antenna-based appli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6d5d027f1156bdf829a5b9a599fd2c7
https://doi.org/10.23919/ursigass49373.2020.9232223
https://doi.org/10.23919/ursigass49373.2020.9232223
Autor:
Chaouki Kasmi, John J. Pantoja, Jorge Armando Rodríguez, Fahad Alyafei, Felix Vega, Carlos Rivera, Francisco Roman, Jorge Alejandro Cristancho
Publikováno v:
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science.
This paper presents the analysis of high current impulsive tests performed on electro-conductive fabrics. A ripstop conductive fabric is tested against 5.4 kA and 9.0 kA $8/ 20 \mu \mathrm{s}$ lightning currents. An equivalent circuit is used to repr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9d6a73bee8b063cf3c10ebf4c1444bc
https://doi.org/10.23919/ursigass49373.2020.9232413
https://doi.org/10.23919/ursigass49373.2020.9232413
Publikováno v:
2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science.
This work presents an analysis of the performance of two different preprocessing techniques for improving the quality of video frames previously reconstructed from compromising electromagnetic emanations produced by video interfaces connecting extern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d364dd06c57747f4408b3afae0cb812
https://doi.org/10.23919/ursigass49373.2020.9232388
https://doi.org/10.23919/ursigass49373.2020.9232388
Autor:
Fahad Alyafei, Chaouki Kasmi, Eder Fabian Ruiz, Daniel Chaparro-Arce, John J. Pantoja, Felix Vega
Publikováno v:
2020 IEEE International Conference on Computational Electromagnetics (ICCEM).
In this paper, a clutter removal technique for radargrams obtained with a ground penetration radar (GPR) is presented. The technique, based in the singularity expansion method (SEM), allows to select the poles of the recorded signals that correspond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc1c4ea90ba5e583ad4145a4c6466571
https://doi.org/10.1109/iccem47450.2020.9219520
https://doi.org/10.1109/iccem47450.2020.9219520
Publikováno v:
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting.
This work presents a preliminary design for a high-power, tunable resonant radiator. The device is composed of an Impulse Radiating Antenna integrated with a tunable Frequency Selective Surface (FSS) in the UHF band. By changing the separation betwee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cbb565c666ef16c23d982a5e16ea642d
https://doi.org/10.1109/ieeeconf35879.2020.9330440
https://doi.org/10.1109/ieeeconf35879.2020.9330440
Many studies were dedicated to the analysis of the propagation of High Energy Laser beams in free space. Laser beams propagation performance in the presence of atmospheric constituents may degrade by some interrelated linear and nonlinear phenomena.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b260e2313d9e1339dc464084af730e7
https://doi.org/10.36227/techrxiv.12526295
https://doi.org/10.36227/techrxiv.12526295
