Ara es mostren els items 1-20 de 28

  • Accuracy considerations in microstrip surface impedance measurements 

    O'Callaghan Castellà, Juan Manuel; Sans, C.; Collado Gómez, Juan Carlos; Canet Grau, Eduard; Pous Andrés, Rafael; Fontcuberta, Josep (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-06-30)
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    An approach is proposed for the design, measurement and data extraction of superconducting microstrip resonators used in determination of surface resistance and penetration depth. Major sources of error are analyzed and ...
  • Accuracy considerations in surface impedance measurements 

    O'Callaghan Castellà, Juan Manuel; Sans, C; Pous Andrés, Rafael; Collado Gómez, Juan Carlos; Canet, E (1997-06)
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    An approach is proposied for the design, measurement and data extraction of superconducting microstrip resonators used in determination of surface resistance and penetration depth. Major sources of error are analyzed and ...
  • Application of the measured equation of invariance to radiation and scattering by flat surfaces 

    Pous Andrés, Rafael; Prouty, M.D.; Mei, K.K. (. IEEE AP-S SYMPOSIUM DIGEST, 1993)
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    Because on flat surfaces the electric currents are confined to two dimensions, a simple vector potential formulation can be used. The problem of radiation and scattering by rectangular strip dipoles is solved, including ...
  • Application of the measured equation of invariance to transmission. 

    Prouty, M.D.; Pous Andrés, Rafael; Mei, K.K. (Sociedad Española de Mineralogía, 1993)
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    The MEI (measured equation of invariance) method can easily be applied to static analyses of uniform transmission lines, such as single and coupled microstrip lines. Laplace's equation is solved for the static electric ...
  • Design and fabrication of coplanar YBCO structures on lithium niobate substrates 

    Rozan, Edouard; Collado Gómez, Juan Carlos; Garcia, Alfredo; O'Callaghan Castellà, Juan Manuel; Pous Andrés, Rafael; Fàbrega Sanchez, Lourdes; Rius Casals, Juan Manuel; Rubí, R; Fontcuberta, J; Harackiewicz, F (1999-06)
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    YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// (YBCO) with low RF losses has been successfully deposited onto lithium niobate (LNO) to improve the performance of electrooptic Mach-Zender modulators. Epitaxial, c-axis oriented ...
  • Design and fabrication of coplanar YBCO structures on lithium niobate substrates 

    Rozan, Edouard; Collado Gómez, Juan Carlos; García, A.; O'Callaghan Castellà, Juan Manuel; Pous Andrés, Rafael; Fàbrega i Soler, Lluís; Rius Casals, Juan Manuel; Rubí, R.; Fontcuberta, Josep; Harackiewicz, F. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1999-06-30)
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    YBa2Cu3O7-δ (YBCO) with low RF losses has been successfully deposited onto lithium niobate (LNO) to improve the performance of electrooptic Mach-Zender modulators. Epitaxial, c-axis oriented superconducting YBCO thin films ...
  • Diseño asistido por ordenador de arrays de antenas microstrip en bandas X y K 

    Pous Andrés, Rafael; Ferrando Bataller, Miquel (Universidad Politécnica de Madrid (UPM), 1988)
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    In this paper, a CAD/CAM program for design and manufacturing of microstrip antenna array is presented. From basic antenna specifications, the program calculates all parameters and dimensions, and draws a mask, ready for ...
  • Efecto de la variación angular en el vértice de alimentación de la antena fractal de Sierpinski 

    Puente Baliarda, Carles; Navarro Bernal, Manuel; Romeu Robert, Jordi; Pous Andrés, Rafael (1997)
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  • Fractal design of multiband and low side-lobe arrays 

    Puente Baliarda, Carles; Pous Andrés, Rafael (1996-05)
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    Most array factor design techniques are highly dependent on the operating wavelength. In this paper, a novel technique based on fractal structures is described for multiband operation. The analysis is focused in two different ...
  • Fractal multiband antenna based on the sierpinski gasket 

    Puente Baliarda, Carles; Romeu Robert, Jordi; Pous Andrés, Rafael; García, X; Benítez, F (Institution of Electrical Engineers, 1996-01)
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    Experimental and computed results show a multiband behaviour over five bands for the new fractal Sierpinski antenna. Such a behaviour is based on the self-similarity properties of the antenna's fractal shape, which might ...
  • Full wave analysis of the image hybrid dielectric/HTS resonator 

    Sans, C; O'Callaghan Castellà, Juan Manuel; Sancho, D; Pous Andrés, Rafael; Fontcuberta, J; Ji-Fuh, Liang; Guo-Chun, Liang (Institution of Electrical Engineers, 1997-06)
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    An analysis of the image hybrid dielectric/HTS resonator is carried out. A full-wave radial mode-matching method is used to obtain the electromagnetic fields inside the resonator for single TE01 and dual HE11 modes. The ...
  • Full wave analysis of the image hybrid dielectric/hts resonator 

    Sans, C; O'Callaghan Castellà, Juan Manuel; Sancho, D; Pous Andrés, Rafael; Fontcuberta, J; Ji-Fuh, Liang; Guo-Chun, Liang (1997-12)
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    — An analysis of the image hybrid dielectric/hightemperature superconductor (HTS) resonator is carried out. A full-wave radial mode-matching method is used to obtain the electromagnetic fields inside the resonator for ...
  • Full wave analysis of the image hybrid dielectric/HTS resonator 

    Sans, C.; O'Callaghan Castellà, Juan Manuel; Sancho, D.; Pous Andrés, Rafael; Fontcuberta, Josep; Liang, Ji-fhu; Liang, Guo-chun (IEEE, 1997-12-31)
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    An analysis of the image hybrid dielectric / high-temperature superconductor (HTS) resonator is carried out. A full-wave radial mode-matching method is used to obtain the electromagnetic fields inside the resonator for ...
  • Full wave modelling of hts dual mode patch filters and staggered coupled-line filters 

    Flores Jiménez, Alejandro; Collado Gómez, Juan Carlos; Sans, C.; O'Callaghan Castellà, Juan Manuel; Pous Andrés, Rafael; Fontcuberta, Josep (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-06-30)
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    In order to obtain high-power handling, dual-mode patch HTS filters have been analyzed through Green's function and desegmentation techniques. A precise circuit model has been obtained and applied to the filter design ...
  • Full wave modelling of hts dual mode patch filters and staggered coupled-line filters 

    Flores, A; Collado, C; Sans, C; O'Callaghan Castellà, Juan Manuel; Pous Andrés, Rafael; Fontcuberta, J (1997-06)
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    In order to obtain high-power hzuidlirig, dual-nlode patch HTS filters have been analyzed through Green’s function rad desegmentation techniques. A precise circuit model has been obtained and applied to the filter design ...
  • Further insight into the measured equation of invariance EM theory 

    Mei, K.K.; Pous Andrés, Rafael; Prouty, M.D.; Liu, Y.W. (. IEEE AP-S SYMPOSIUM DIGEST, 1990)
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    The measured equation of invariance (MEI) is a concept in field computation which leads to the generation of local linear equations in lieu of absorption conditions to terminate finite difference or finite element equations. ...
  • Integral formulation of the measured equation of invariance: a novel sparse matrix boundary element method 

    Rius Casals, Juan Manuel; Pous Andrés, Rafael; Cardama Aznar, Ángel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-05-01)
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    A novel integral formulation of the measured equation of invariance method is derived from the reciprocity theorem and implemented for perfectly conducting (PEC) 2-D scattering problems. This formulation uses the electric ...
  • Measured equation of invariance: a new concept in field computations 

    Mei, K.K.; Pous Andrés, Rafael; Chen, Z.; Liu, Y.W.; Prouty, M.D. (1994-10)
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    Numerical computations of frequency domain field problems or elliptical partial differential equations may be based on differential equations or integral equations. The new concept of field computation presented in this ...
  • Modelo sencillo para el estudio de los parámetros de entrada de una antena fractal de Sierpinski 

    Borja Borau, Carmen; Puente Baliarda, Carles; Medina Sierra, Agustín; Romeu Robert, Jordi; Pous Andrés, Rafael (1997)
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  • Modificación de la antena de Sierpinski para el ajuste de las bandas operativas 

    Navarro Bernal, Manuel; Puente Baliarda, Carles; Bartolomé, R; Romeu Robert, Jordi; Pous Andrés, Rafael (1997)
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