Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Juan F. Valenzuela-Valdes"'
Autor:
Miguel A. Balmaseda-Marquez, Guido Valerio, Pablo Padilla, Angel Palomares-Caballero, Juan F. Valenzuela-Valdes, Carlos Molero
Publikováno v:
IEEE Access, Vol 12, Pp 110840-110849 (2024)
The presented study introduces a semi-analytical circuit model (CM) to fully characterize a dielectric unit cell structure made by blocks instead of applying the effective medium theory. A fitting strategy is used to a obtain a better understanding o
Externí odkaz:
https://doaj.org/article/087656b2b36148cba642e5ed04aacf1e
Autor:
Salvador Moreno-Rodriguez, Antonio Alex-Amor, Pablo Padilla, Juan F. Valenzuela-Valdes, Carlos Molero
Publikováno v:
IEEE Access, Vol 11, Pp 116665-116673 (2023)
In this paper, we study the scattering and diffraction phenomena in time-modulated metamaterials of metallic nature by means of Floquet equivalent circuits. Concretely, we focus on a time-periodic screen that alternates between “metal” and “air
Externí odkaz:
https://doaj.org/article/0869a55dc34945328c450b9f09d4e5ba
Autor:
Jose J. Rico-Palomo, Jesus Galeano-Brajones, David Cortes-Polo, Juan F. Valenzuela-Valdes, Javier Carmona-Murillo
Publikováno v:
IEEE Access, Vol 10, Pp 113662-113677 (2022)
The exponentially growing trend of Internet-connected devices and the development of new applications have led to an increase in demands and data rates flowing over cellular networks. If this continues to have the same tendency, the classification of
Externí odkaz:
https://doaj.org/article/da6aeb5b8fff4b8288dd50d0687fcbbe
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 3, Pp 475-492 (2022)
This article presents a novel application of the t-distributed Stochastic Neighbor Embedding (t-SNE) clustering algorithm to the telecommunication field. t-SNE is a dimensionality reduction algorithm that allows the visualization of large dataset int
Externí odkaz:
https://doaj.org/article/91c22ec0beb74e86b5164203eaab9100
Autor:
Alejandro Ramirez-Arroyo, Antonio Alex-Amor, Carmelo Garcia-Garcia, Angel Palomares-Caballero, Pablo Padilla, Juan F. Valenzuela-Valdes
Publikováno v:
IEEE Access, Vol 8, Pp 183583-183595 (2020)
This article presents a novel application of the time-gating technique to the field of propagation channel study. The time-gating technique is well known in the field of antenna measurement and it is used to eliminate reflected components in outdoor
Externí odkaz:
https://doaj.org/article/6994dd9e0c984591b68fd1ffc9f47092
Autor:
Alejandro Ramirez-Arroyo, Pablo H. Zapata-Cano, Angel Palomares-Caballero, Javier Carmona-Murillo, Francisco Luna-Valero, Juan F. Valenzuela-Valdes
Publikováno v:
IEEE Access, Vol 8, Pp 204295-204308 (2020)
Mobile communications are growing and the number of users is constantly increasing at an accelerated rate, as well as the demand for the services they request. In the last few years, many efforts have focused on the design and deployment of the new f
Externí odkaz:
https://doaj.org/article/71151d2b228f4e7d900280b6e241cf18
Publikováno v:
IEEE Access, Vol 5, Pp 5149-5157 (2017)
This paper is a study of the inhomogeneity reduction for near-field acquisition in high-resolution magnetic resonance imaging (MRI) systems. The acquisition homogeneity in MRI imaging modality is an open issue concerning the optimal MRI image generat
Externí odkaz:
https://doaj.org/article/1ca0e7b7865544db9f7fdeb76ae66b98
Publikováno v:
International Journal of Antennas and Propagation, Vol 2013 (2013)
Externí odkaz:
https://doaj.org/article/9e37415042874177883ddb874d931cec
Publikováno v:
IEEE Transactions on Antennas and Propagation. 69:164-172
A multilayer aperture antenna array in millimeter-wave band is presented in this article. The antenna array is based on glide-symmetric holey gap-waveguide technology combined with E-plane insertion gaps for a low-cost and low-loss design. The radiat
Publikováno v:
2022 16th European Conference on Antennas and Propagation (EuCAP).