Exploració per tema "microwave circuits"

Ara es mostren els items 1-9 de 9

    • Circuit model for coplanar-slotline tees 

      Ribó i Pal, Miquel; Pradell i Cara, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-05-31)
      Article
      Accés obert
      Coplanar-slotline tees have been used in a number of microwave circuits, although no complete models were available to explain their behavior. In this letter, a new “circuit-model” for a coplanar-slotline tee is presented. ...

    • Circuit Model for mode conversion in coplanar waveguide assymmetric shunt impedances 

      Ribó i Pal, Miquel; Pradell i Cara, Lluís (IEE-INST ELEC ENG, 1999-04-30)
      Article
      Accés obert
      A new `circuit model' for the conversion between even and odd modes in coplanar waveguide asymmetric shunt impedances is presented. The model is based on the separation of modes into two input and two output ports. In ...

    • Development and experimental characterization of frequency-reconfigurable microwave amplifiers 

      Carrera Escalé, Pol (Universitat Politècnica de Catalunya, 2019-07)
      Treball Final de Grau
      Accés obert
      Frequency-reconfigurable amplifiers have become a topic of interest because of the need for compact, light-weight and inexpensive communication systems able to operate at different frequency bands. Key subsystems in ...

    • Harmonic balance algorithms for the nonlinear simulation of HTS devices 

      Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Parrón Granados, Josep; Pons, J.; O'Callaghan Castellà, Juan Manuel; Rius Casals, Juan Manuel (KLUWER ACADEMIC/PLENUM PUBL, 2001-02-28)
      Article
      Accés obert
      This paper describes the application of Harmonic Balance algorithms to predict nonlinear effects in planar High Temperature Superconductors (HTS) microwave circuits. The resulting algorithms are fast and efficient and can ...

    • Ill conditioning loci in noise parameter determination 

      O'Callaghan Castellà, Juan Manuel; Alegret, A.; Pradell i Cara, Lluís; Corbella Sanahuja, Ignasi (IEE-INST ELEC ENG, 1996-08-01)
      Article
      Accés obert
      An analysis of the problem of noise parameter determination is carried out. It is found that the mathematical problem is ill-posed if all the source reflection coefficients (Γs) used in the measurements fall onto a line, ...

    • Ill conditioning loci in noise parameter determination 

      O'Callaghan Castellà, Juan Manuel; Alegret Ginesta, Alexandre; Pradell i Cara, Lluís; Corbella Sanahuja, Ignasi (IEE-INST ELEC ENG, 1996-08-01)
      Article
      Accés obert
      An analysis of the problem of noise parameter determination is carried out. It is found that the mathematical problem is ill-posed if all the source reflection coefficients (Γs) used in the measurements fall onto a line, ...

    • Method for measuring noise parameters of microwave two-port 

      Lázaro Guillén, Antoni; Pradell i Cara, Lluís; O'Callaghan Castellà, Juan Manuel (IEE, 1998-06-30)
      Article
      Accés obert
      A new tuner-based method for measuring the four noise-parameters of a two-port is proposed. It makes use of a novel measurement ratio that includes noise powers and mismatch factors simultaneously. In contrast to previous ...

    • Microwave filtering amplifiers 

      Carrera Escalé, Pol (Universitat Politècnica de Catalunya, 2021-06)
      Projecte Final de Màster Oficial
      Accés obert
      Filtering microwave amplifiers have become a topic of interest because of the need for devices capable of isolating the system itself and avoiding interference from other systems. Key subsystems in communication receivers ...

    • Xarxa de microones sintonitzadora multimodal reconfigurable 

      Ribera Graells, Adrià (Universitat Politècnica de Catalunya, 2013-12-04)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] Nowadays, the matching networks are essential components in front-end architectures for microwave communication systems operating up several gigahertzes. Due to the increase of communication standards in multiband ...