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Listar por autor "Fuster Escuder, José Miguel"

Mostrando ítems 1-20 de 29

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Analysis of Fresnel Zone Plates Focusing Dependence on Operating Frequency

Fuster Escuder, José Miguel; Candelas Valiente, Pilar; Castiñeira Ibáñez, Sergio; Pérez López, Sergio; Rubio Michavila, Constanza (MDPI AG, 2017)

[EN] The focusing properties of Fresnel Zone Plates (FZPs) against frequency are analyzed in this work. It is shown that the FZP focal length depends almost linearly on the operating frequency. Focal depth and focal ...
Analysis of Predistortion Techniques on Fresnel Zone Plates in Ultrasound Applications

Fuster Escuder, José Miguel; Pérez-López, Sergio; Belmar Ibáñez, Francisco; Candelas Valiente, Pilar (MDPI AG, 2021-08)

[EN] In this work, we analyze the effect of predistortion techniques on the focusing profile of Fresnel Zone Plates (FZPs) in ultrasound applications. This novel predistortion method is based on either increasing or ...
Análisis de la eficiencia de lentes de Fresnel acústicas

Pérez López, Sergio (Universitat Politècnica de València, 2019-08-01)

[ES] En este trabajo se ha realizado un estudio teórico de la eficiencia de transmisión de lentes de Fresnel. Los resultados muestran que la distribución de las regiones transparentes y opacas de la lente no influye cuando ...
Bifocal Ultrasound Focusing Using Bi-Fresnel Zone Plate Lenses

Pérez-López, Sergio; Fuster Escuder, José Miguel; Candelas Valiente, Pilar; Tarrazó-Serrano, Daniel; Castiñeira Ibáñez, Sergio; Rubio Michavila, Constanza (MDPI AG, 2020)

[EN] In this work, we present a bifocal Fresnel zone plate (BiFZP) capable of generating focusing profiles with two different foci. The performance of the BiFZP is demonstrated in the ultrasound domain, with a very good ...
Design of Acoustic Bifocal Lenses Using a Fourier-Based Algorithm

Fuster Escuder, José Miguel; Pérez-López, Sergio; Candelas Valiente, Pilar (MDPI AG, 2021-12)

[EN] In this work, we develop a new design method based on fast Fourier transform (FFT) for implementing zone plates (ZPs) with bifocal focusing profiles. We show that the FFT of the governing binary sequence provides a ...
Design of Acoustic Lenses for Ultrasound Focusing Applications

Pérez López, Sergio (Universitat Politècnica de València, 2022-01-17)

[ES] La focalización de ultrasonidos tiene muchas aplicaciones en una gran variedad de áreas tanto científicas como industriales. Los ultrasonidos focalizados son una de las herramientas principales usada por médicos en ...
Design of Binary-Sequence Zone Plates in High Wavelength Domains

Fuster Escuder, José Miguel; Pérez-López, Sergio; Candelas Valiente, Pilar; Rubio Michavila, Constanza (MDPI AG, 2018)

[EN] The design of zone plates is an important topic in many areas of physics, such as optics, X-rays, microwaves or ultrasonics. In this paper, a zone plate design method, which provides high flexibility in the shaping ...
Estudio de la evolución de la red Backhaul

Huedo López, Aleix Pascual (Universitat Politècnica de València, 2022-10-14)

[ES] En este proyecto se pretende analizar la evolución de la red de Backbone y Backhaul que conecta la red de acceso con la red central del operador. El trabajo se basará principalmente en el estudio del avance de las ...
Extensión de la red de transmisión del Operador móvil INWI En la región de Nador

Squalli Houssaini, Yahya (Universitat Politècnica de València, 2017-02-27)

La evolución tecnológica de las comunicaciones móviles, en el mundo generalmente y en marruecos específicamente, ha tenido un crecimiento exponencial en los últimos años. El cliente quiere beneficiarse ya de las ...
Fractal lenses based on Cantor binary sequences for ultrasound focusing applications

Pérez-López, Sergio; Fuster Escuder, José Miguel; Candelas Valiente, Pilar; Rubio Michavila, Constanza (Elsevier, 2019)

[EN] In this work, we demonstrate the application of Cantor fractal lenses in acoustics. The Cantor Zone Plate (CZP), previously introduced in optics, is designed from a conventional Fresnel Zone Plate (FZP) using a binary ...
Harmonic up/down-conversion through photonic RF phase shifters in phased-array antenna beam-forming applications

Fuster Escuder, José Miguel; Martí Sendra, Javier; Corral, Juan L.; Candelas Valiente, Pilar (John Wiley & Sons, 1999-08-20)

[EN] A photonic device which achieves both phase shifting and harmonic photonic lip / down-conversion of outgoing / incoming microwave / millimeter-wave signals is presented. This device may be easily integrated, becoming ...
Liquid-liquid core-shell configurable mesoscale spherical acoustic lens with subwavelength focusing

Pérez-López, Sergio; Candelas Valiente, Pilar; Fuster Escuder, José Miguel; Rubio Michavila, Constanza; Minin, Oleg V.; Minin, Igor V. (Japan Society of Applied Physics, 2019)

[EN] In this work, we present a lens based on a thin hollow ABS spherical container structure, which can be filled up with different compatible liquids. The acoustic jet can be dynamically shaped by either shifting the ...
M-Bonacci Zone Plates for Ultrasound Focusing

Pérez-López, Sergio; Fuster Escuder, José Miguel; Candelas Valiente, Pilar (MDPI AG, 2019-10)

[EN] In this work, we present a thorough analysis on M-bonacci zone plates for ultrasound focusing applications. These planar lenses are capable of providing bifocal focusing profiles with equal intensity in both foci and ...
Modeling Mach-Zehnder LiNbO3 external modulators in microwave optical systems

Fuster Escuder, José Miguel; Martí Sendra, Javier; Candelas Valiente, Pilar (John Wiley & Sons, 2001-07-20)

[EN] A novel modeling approach for Mach-Zehnder electrooptic modulators (MZ-EOMs) in microwave optical systems is presented. MZ-EOM traveling-wave electrodes are fully characterized by an electrode transfer function (ETF) ...
Numerical simulation and laboratory measurements on the influence of fractal dimension on the acoustic beam modulation of a Polyadic Cantor Fractal lenses

Tarrazó-Serrano, Daniel; Castiñeira Ibáñez, Sergio; Candelas Valiente, Pilar; Fuster Escuder, José Miguel; Rubio Michavila, Constanza (Elsevier, 2019)

[EN] The possibility of modulating the ultrasound beam produced by a transducer through lenses has become an important task. The fact that these lenses are flat, facilitates their design, construction and applications. ...
Observation of ultrasonic Talbot effect in perforated plates

Candelas Valiente, Pilar; Fuster Escuder, José Miguel; Pérez-López, Sergio; Uris Martínez, Antonio; Rubio Michavila, Constanza (Elsevier, 2019)

[EN] The Talbot effect using ultrasonic waves transmitted through a periodic perforated plate is presented. The ultrasonic wave-field at the exit of the perforated plate replicates the perforated pattern at the Talbot ...
On the Design of Soret Zone Plates based on Binary Sequences using Directional Transducers

Candelas Valiente, Pilar; Pérez-López, Sergio; Fuster Escuder, José Miguel (MDPI AG, 2021-09)

[EN] In this work, we analyze the effect of the distribution of transparent Fresnel regions over the focusing profile of Soret Zone Plates (SZP) based on binary sequences. It is shown that this effect becomes very significant ...
On the focusing enhancement of Soret zone plates with ultrasound directional transducers

Pérez-López, Sergio; Fuster Escuder, José Miguel; Candelas Valiente, Pilar; Rubio Michavila, Constanza (American Institute of Physics, 2019-06-03)

[EN] This work analyzes the influence of the distribution of transparent Fresnel regions over the focusing profile of Soret Zone Plates. It is shown that this effect becomes very significant in those fields where directional ...
On the use of phase correction rings on Fresnel zone plates with ultrasound piston emitters

Sergio Pérez-López; Fuster Escuder, José Miguel; Candelas Valiente, Pilar; Rubio Michavila, Constanza; Belmar Ibáñez, Francisco (American Institute of Physics, 2018)

[EN] In this work, the distortion of the Fresnel Zone Plate focusing profile generated by a piston emitter in ultrasound applications is significantly reduced through the use of phase correction rings, which compensate the ...
Photonic RF phase modulator with harmonic up-conversion for digital microwave link applications

Candelas Valiente, Pilar; Fuster Escuder, José Miguel; Martí Sendra, Javier; Martínez Zaldívar, Francisco José (John Wiley & Sons, 2000-01-05)

[EN] A photonic integrated-optic RF phase modulator with harmonic up-con¿ersion for digital microwa¿e link applications is presented. This de¿ice achie¿es both electrical phase modulation and harmonic up-con¿ersion of an ...