Exploració per autor "de los Reyes, Elías"

Ara es mostren els items 21-40 de 41

    • Mezclador autooscilante con FET de AsGa en banda X. Consideraciones de diseño 

      Corbella Sanahuja, Ignasi; de los Reyes, Elías; Elias Fusté, Antoni (1998)
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      Using a single active device as a non linear element both oscillating and mixing functions are acomplished. A method of design that uses a dielectric resonator as a frequency selective network is given.

    • Mezclador autopolarizado en banda X 

      de los Reyes, Elías; Elias Fusté, Antoni (1981)
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      Preliminary results of the study of a microstrip mixer at X band frequencies, on an inexpensive plastic substrate realization are presented. A balanced configuration with a single schottky diode as non-linear element was ...

    • Mezclador subarmónico sobre T.E.C. MESFET de AsGa 

      Elias Fusté, Antoni; de los Reyes, Elías; Comerón Tejero, Adolfo (Universidad de Sevilla, 1984)
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      It is showed that it is possible to obtain conversion gain in a subharmonically pumped mixer using a GaAs MESFET. The input and output load conditions are presented. The dynamic range and the converted band are strongly ...

    • Microwave imaging with crossed linear arrays 

      Soneira Ferrando, M. José; de los Reyes, Elías; Bolomey, Jean Charles (1987-11-11)
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      The capabilities of a microwave imaging system working in air using two crossed linear arrays are described. The analytic expressions of the focusing procedures are derived, resolution and available volume of reconstruction ...

    • Microwave Tomography. Clinical application 

      Broquetas Ibars, Antoni; Jofre Roca, Lluís; de los Reyes, Elías (Universidad Politécnica de Madrid (UPM), 1988)
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      The clinical applications of a microwave tomographic system are studied. Imaging parameters are appropriate for medical use : a spatial resolution of 7mm anda contrast resolution of 1% for a measurement time of 3 seconds. ...

    • Monopulso en baja cota. Análisis de prestaciones 

      de los Reyes, Elías; Ferrando, Miguel; Elias Fusté, Antoni (1987)
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      In this article are described sorne aspects to account on design and simulation of monopulses with multipath perturbations.

    • Optimización de desfasadores de línea cargada 

      Elias Fusté, Antoni; de los Reyes, Elías (1987)
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      Esta comunicación presenta un método de opimización para la concepción de desfasadores de línea periodicamente cargada. La optimización se ha realizado con relación a los siguientes parámetros: - Ensanchamiento de la ...

    • Oscilador mezclador en banda X 

      Terradas, Jordi; Elias Fusté, Antoni; de los Reyes, Elías (1985)
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      The properties of GaAs MESFET non linearities can be used to implement a self-oscillating mixer. This paper describes a new single-gate MESFET self-oscillating mixer, its design containts and the obtained performances.

    • Radar Doppler de bajo coste como sensor de alarma en tecnología impresa 

      de los Reyes, Elías; Ferrando Bataller, Miquel; Elias Fusté, Antoni; Corbella Sanahuja, Ignasi (1981)
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      General configurations for homodyne Doppler Radars for intruder detection are presented. A prototype on microstrip technology has been realized which exhibits excellent performances at a low component cost. This prototype ...

    • Radioenlace digital a 11 GHz para telemando y telecontrol 

      Artal, E.; Cardama Aznar, Ángel; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi; Elias Fusté, Antoni; Ferrando, Miguel; Jofre Roca, Lluís; de los Reyes, Elías (Institute of Electrical and Electronics Engineers (IEEE), 1984)
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      A digital radio-relay link in the band 10.7- 11.7 GHz developed for the remote control system of ENHER is presented. The objectives were the construction of a reliable and yet low-cost transmitter-receiver. To accomplish ...

    • Receptor coherente para imágenes por microondas 

      de los Reyes, Elías; Jofre Roca, Lluís; Ferrando Bataller, Miquel (1984)
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      In order to avoid heating in the microwave imaging of biological bodies a very high sensitivity is needed for the receiver. We present a low cost sensitive coherent microwave receiver in microstrip technology.

    • Receptor para TV difundida directamente desde satélites 

      Artal, E.; Cardama Aznar, Ángel; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi; Elias Fusté, Antoni; Ferrando, M.; Jofre Roca, Lluís; de los Reyes, Elías (Institute of Electrical and Electronics Engineers (IEEE), 1984)
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      The direct broadcast satellite receiver in the 12 GHz band developed in the Electrophysics Department in cooperation with the R & D Departments of Mier Allende, S.A. and Tagra, S.A. is described. It features a low-noise ...

    • Simulación de ecos radar del tipo Weibull correlado y coherente 

      Elias Fusté, Antoni; de los Reyes, Elías; Fernández de Muniain, Javier (1989)
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      A canonical model is examinated for generating coherent Weibull vectors wi th a desired correlation matrix and specified parameters. Such vectors may represent samples of a correlated radar signal. Statistical and espectral ...

    • Simulación de Procesadores CFAR 

      Elias Fusté, Antoni; de los Reyes, Elías; Casadevall, Laura (1987)
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      The report analizes the behaviour of parametric processors being put under several critical enviromental conditions. Those conditions border-line clutter and multiple target. brand-new processor is proposed by us, OSGO are ...

    • Sistema cilíndrico de tomografía de microondas. Arquitectura de radiofrecuencia. Mejoras y resultados 

      de los Reyes, Elías; Broquetas Ibars, Antoni; Elias Fusté, Antoni; Ibáñez, Juan (1987)
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      The E.M.C. of a prototype for cylindrical microwave tornography is analized, the initial design has been improved and first results are presented.

    • Sistema cilíndrico de tomografía por microondas, arquitectura de radiofrecuencia. Mejoras y resultados 

      de los Reyes, Elías; Broquetas Ibars, Antoni; Elias Fusté, Antoni; Ibáñez, Juan (1987)
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      The E.M.C. of a prototype for cylindrical microwave tornography is analized, the initial design has been improved and first results are presented.

    • Sistema cilíndrico para tomografía rápida de microondas 

      Jofre Roca, Lluís; de los Reyes, Elías; Elias Fusté, Antoni; Ferrando Bataller, Miquel; Romeu Robert, Jordi; Baquero, M; Rius Casals, Juan Manuel (Unión Científica Internacional de Radio (URSI), 1986)
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    • Sistema en banda X para la reconstrucción de imágenes 

      Jofre Roca, Lluís; Ferrando Bataller, Miquel; de los Reyes, Elías; Berenguer Sau, Jordi; Sorolla, M. (1984)
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      This paper describes the theoretical study and experimental set-up for a quasi-real-time active microwave imaging system in band- X. The main contributions are related to the spectral algoritms for the reconstruction ...

    • Subsistemas de radiofrecuencia para tomografía de microondas 

      de los Reyes, Elías; Jofre Roca, Lluís; Ferrando Bataller, Miquel; Elias Fusté, Antoni; Baquero, M; Romeu Robert, Jordi; Rius Casals, Juan Manuel (Unión Científica Internacional de Radio (URSI), 1986)
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    • Temperature and permittivity measurements using a cylindrical microwave imaging system 

      Broquetas Ibars, Antoni; Ferrando Bataller, Miquel; Rius Casals, Juan Manuel; Jofre Roca, Lluís; de los Reyes, Elías; Cardama Aznar, Ángel; Elias Fusté, Antoni; Ibáñez, Juan (Institute of Electrical and Electronics Engineers (IEEE), 1987)
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