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Listar por autor "Sánchez Marín, Juan Rafael"

Mostrando ítems 1-18 de 18

Characterization of Nematic Liquid Crystal at Microwave Frequencies Using Split-Cylinder Resonator Method

Sánchez-Marín, Juan Rafael; Nova-Giménez, Vicente; Bachiller Martin, Maria Carmen; Villacampa, Belén; de la Rua, Alberto; Kronberger, Rainer; Penaranda-Foix, Felipe L.; Boria Esbert, Vicente Enrique (Institute of Electrical and Electronics Engineers, 2019-07)

[EN] Liquid crystal (LC) is an anisotropic liquid material, which flows like a liquid, but at the same time, its molecules have an orientational order like in the solid state. Thus, LC is a promising dielectric material ...
Controlled Out-of-Band Rejection of Filters based on SIW with Alternating Dielectric Line Sections

Sánchez-Marín, Juan Rafael; Bachiller Martin, Maria Carmen; Nova-Giménez, Vicente; Boria Esbert, Vicente Enrique (Institute of Electrical and Electronics Engineers, 2019-04)

[EN] A study for managing the out-of-band rejection in a new topology of filters based on substrate integrated waveguide with alternating dielectric line sections (ADLSs) is presented in this letter. ADLS is a filtering ...
Diseño de filtros de microondas reconfigurables en tecnología ESIW

Sánchez Marín, Juan Rafael (Universitat Politècnica de València, 2015-03-06)

Los filtros de microondas son componentes esenciales en los sistemas de comunicaciones de alta frecuencia. Las prestaciones requeridas para dichos dispositivos son cada vez mayores debido al incremento en la frecuencia de ...
Diseño de transiciones de banda ancha entre línea coplanar y guía de onda Empty Substrate Integrated Coaxial Line

Nova Giménez, Vicente (Universitat Politècnica de València, 2017-05-03)

The design of waveguide devices integrated on a substrate (particularly Empty Integrated Substrate Coaxial Line) is one of the areas of research in microwave more practical today because it allows the use of devices ...
Dynamic Permittivity Measurement of Ground-Tire Rubber (GTR) during Microwave-Assisted Devulcanization

Pérez-Campos, Rafael; Fayos-Fernández, José; Monzó-Cabrera, Juan; Martín Salamanca, Fernando; López Valentín, Juan; Catalá Civera, José Manuel; Plaza González, Pedro José; Sánchez-Marín, Juan Rafael (MDPI AG, 2022-09)

[EN] Many efforts are being made to find innovative ways of recycling rubber from end-of-life tires (ELTs), also called ground tire Rubber (GTR). Recycling through devulcanization allows the reintroduction of rubber back ...
Evaluation of Microwave Synthesis of Ceramic Pigments Based on In Situ Dielectric Characterization

García-Baños, Beatriz; Sánchez-Marín, Juan Rafael; Godes, Jose L.; Leonelli, Cristina; Catalá Civera, José Manuel (MDPI AG, 2023-04)

[EN] The application of microwave technology for efficient and environmentally friendly synthesis of ceramic pigments is a successful and rapidly evolving area of research. However, a clear understanding of the reactions ...
Focusing dielectric slabs for the optimization of heating patterns in single mode microwave applicators

García-Baños, Beatriz; Plaza González, Pedro José; Sánchez-Marín, Juan Rafael; Steger, Sebastian; Feigl, Alexander; Penaranda-Foix, Felipe L.; Catalá Civera, José Manuel (Elsevier, 2022-01-25)

[EN] A new approach based on dielectric slabs with adjustable position is proposed as near-field focusing lenses inside a single-mode microwave applicator to provide specific temperature distributions within a material ...
High Temperature Dielectric Properties of Iron- and Zinc-Bearing Products during Carbothermic Reduction by Microwave Heating

García-Baños, Beatriz; Catalá Civera, José Manuel; Sánchez-Marín, Juan Rafael; Navarrete Algaba, Laura; López-Buendía, Angel M.; Schmidt, Lukas (MDPI AG, 2020-05)

[EN] In this work, the carbothermic reduction of iron- and zinc-bearing products is studied through in situ microwave heating, dielectric properties monitoring, and mass spectrometry up to high temperatures (1000 degrees ...
Improved low reflection transition from microstrip line to empty substrate integrated waveguide

Esteban González, Héctor; Belenguer, Ángel; Sánchez-Marín, Juan Rafael; Bachiller Martin, Maria Carmen; Boria Esbert, Vicente Enrique (Institute of Electrical and Electronics Engineers, 2017-08)

[EN] Substrate-integrated waveguides (SIWs) maintain the advantages of planar circuits (low loss, low profile, easy manufacturing, and integration in a planar circuit board) and improve the quality factor of filter resonators. ...
Métodos de caracterización electromagnética de cristales líquidos a frecuencias de microondas

Nova Giménez, Vicente (Universitat Politècnica de València, 2018-10-05)

En este proyecto se ha analizado la anisotropía dieléctrica de cuatro mezclas de cristal líquido integradas en celdas de vidrio, medidas mediante una cavidad circular dividida o Split-Cylinder Resonator y aplicando tres ...
Microwave calorimeter for dielectric and thermal analysis of materials

Sánchez-Marín, Juan Rafael; Gutiérrez Cano, José Daniel; Plaza González, Pedro José; Penaranda-Foix, Felipe L.; Catalá Civera, José Manuel (Elsevier, 2022-11)

[EN] A fast method for microwave processing and measurement of dielectric and thermal properties of materials as a function of temperature has been developed (MW-DETA). Unlike previous approaches, the method provides totally ...
Microwave Filter based on Substrate Integrated Waveguide with Alternating Dielectric Line Sections

Sánchez-Marín, Juan Rafael; Bachiller Martin, Maria Carmen; Juliá Morte, María; Nova-Giménez, Vicente; Esteban González, Héctor; Boria Esbert, Vicente Enrique (Institute of Electrical and Electronics Engineers, 2018)

[EN] A new topology of microwave filter based on sub- strate integrated waveguide (SIW) with alternating dielectric line sections is presented in this letter. The two alternating sections are waveguides without and with a ...
Miniaturization of Power Divider and 90º Hybrid Directional Coupler for C-Band Applications Using Empty Substrate-Integrated Coaxial Lines

Merello-Gimenez, José Manuel; Nova-Giménez, Vicente; Bachiller Martin, Maria Carmen; Sánchez-Marín, Juan Rafael; Belenguer Martínez, Ángel; Boria Esbert, Vicente Enrique (Institute of Electrical and Electronics Engineers, 2018)

[EN] This paper presents the practical realization of a power divider and a 90° hybrid directional coupler in an empty substrate-integrated coaxial line (ESICL) for C-band frequency applications. This new type of transmission ...
New Decoupled Empty Substrate Integrated Waveguide Realization

Sánchez-Marín, Juan Rafael; Bachiller Martin, Maria Carmen; Esteban González, Héctor; Belenguer Martínez, Ángel; Nova-Giménez, Vicente; Boria Esbert, Vicente Enrique (Institution of Electrical Engineers, 2017)

[EN] This work presents a novel Decoupled Empty Substrate Integrated Waveguide (DESIW), which enables AC/DC decoupling in any device that is integrated in it. The decoupling strategy is performed throughout a ...
Reconfigurable Devices using Liquid Crystal at Microwave Frequencies in Substrate Integrated Waveguide

Sánchez Marín, Juan Rafael (Universitat Politècnica de València, 2019-12-02)

[ES] La cantidad de servicios de telecomunicación se ha incrementado signiticativamente en las últimas décadas. El uso de teléfonos inteligentes, así como el Internet de las Cosas, está generando una saturación del espectro ...
Reconfigurable Resonator in Decoupled Empty SIW Technology Using Liquid Crystal Material

Sánchez-Marín, Juan Rafael; Bachiller Martin, Maria Carmen; Nova-Giménez, Vicente; Boria Esbert, Vicente Enrique (Institution of Electrical Engineers, 2019-08-08)

[EN] This paper presents a novel continuously tunable microwave resonator based on Liquid Crystal (LC) material. The reconfigurable device is implemented in Decoupled Empty Substrate Integrated Waveguide (DESIW) technology. ...
Stay tuned: A novel continuously-tunable reconfigurable microwave resonator based on Liquid Crystal materials

Sánchez-Marín, Juan Rafael; Bachiller Martin, Maria Carmen; Nova-Giménez, Vicente; Boria Esbert, Vicente Enrique (Institution of Electrical Engineers, 2019-08-08)
Temperature dependency of the dielectric properties of hydrated and ordinary Portland cement and their constituent phases at 2.45 GHz up to 1100 ºC

Dilissen, Nicole; Vleugels, Jef; Vermeiren, Jules; García-Baños, Beatriz; Sánchez-Marín, Juan Rafael; Catalá Civera, José Manuel (Elsevier, 2023-03)

[EN] This work focuses on microwave (MW)-dehydration and clinkering of hydrated cement paste, by studying the intrinsic MW¿material interaction during heating to 1100 °C. The dielectric properties of C3S, C2S, C3A, C4AF, ...