Ara es mostren els items 1-17 de 17

    • A large signal nonlinear MODFET model from small signal S-parameters 

      O'Callaghan Castellà, Juan Manuel; Beyer, James B. (Institute of Electrical and Electronics Engineers (IEEE), 1989)
      Text en actes de congrés
      Accés obert
      A general technique for predicting the MODFET large signal performance has been developed. The technique is based entirely on experimental data (small signal S-parameters at different biased points) and therefore is ...
    • A large signal nonlinear MODFET model from small signal S-parameters 

      O'Callaghan Castellà, Juan Manuel; Beyer, Jb (1989)
      Text en actes de congrés
      Accés obert
      A general technique for predicting the MODFET large signal performance has been developed. The technique is based entirely on experimental data (small signal S-parameters at different biased points) and therefore is ...
    • A method for characterizing coplanar waveguide-to-microstrip transitions, and its application to the measurement of microstrip devices with coplanar microprobes 

      Maya Sánchez, Mª del Carmen; Lázaro Guillén, Antoni; Pradell i Cara, Lluís; Paco, D. de (JOHN WILEY & SONS INC, 2003-12-31)
      Article
      Accés obert
      This paper presents a method for characterizing coplanar waveguide-to-microstrip (CPW-M) transitions by using on-wafer coplanar (CPW) microprobes. It is based on extracting the transmission matrix of the CPW-M transition ...
    • A Method to Simultaneously Extract the Small-Signal Equivalent Circuit and Noise Parameters of Heterojunction Bipolar Transistors 

      Maya Sánchez, Mª del Carmen; Lázaro Guillén, Antoni; Pradell i Cara, Lluís (JOHN WILEY & SONS INC, 2006-07-31)
      Article
      Accés obert
      A method to extract the elements of the small-signal equivalent circuit and the noise parameters (NPs) of heterojunction bipolar transistors (HBTs) is presented. The extraction is done by simultaneous fitting of the measured ...
    • Analisys of noise injection networks for interferometric radiometer calibration 

      Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier (IEEE Microwave Theory and Techniques Society, 2000-04)
      Article
      Accés obert
      Abstract: The spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture ...
    • Analisys of noise-injection networks for interferometric-radiometer calibration 

      Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04-30)
      Article
      Accés obert
      The spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture and sea surface ...
    • Analysis of Correlation and Total Power Radiometer Front-Ends Using Noise Waves 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Rautiainen, Kimmo; Martín Neira, Manuel; Colliander, Andreas (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-11-30)
      Article
      Accés obert
      A complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in ...
    • Analysis of correlation and total power radiometer front-ends using noise waves 

      Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Rautiainen, Kimmo; Martín Neira, Manuel; Colliander, Andreas (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-11-30)
      Article
      Accés obert
      A complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in ...
    • Case study of a differential single-pole double-throw RF switch using memristors 

      Tsipas, Evangelos; Stavroulakis, Emmanouil; Chatzipaschalis, Ioannis; Rallis, Konstantinos; Vasileiadis, Nikolaos; Dimitrakis, Panagiotis; Kostopoulos, Athanasios; Konstantinidis, George; Sirakoulis, Georgios Ch. (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Nanotechnology-enabled novel RF switches have emerged as a promising alternative to MEMS, owing to current technological limitations of the latter. Additionally, recent research endeavors in the telecommunications sector ...
    • Circuit model for a coplanar-slotline cross 

      Miquel, Ribó; Pradell i Cara, Lluís (2000-12)
      Article
      Accés obert
      A new 6-port
    • Circuit model for a coplanar-slotline cross 

      Ribó i Pal, Miquel; Pradell i Cara, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-12-31)
      Article
      Accés obert
      A new 6-port “circuit-model” for coplanar-slotline crosses is presented. The model is based on the separation of the two fundamental Coplanar Waveguide (CPW) modes (even and odd) into different ports. It generalizes previous ...
    • Exact representation of antenna system diversity performance from input parameter description 

      Blanch Boris, Sebastián; Romeu Robert, Jordi; Corbella Sanahuja, Ignasi (2003-05-31)
      Article
      Accés obert
      A simplc formulation Io compute thc envelope correlation of an antenna divemiry system is dcrired. 11 is shown how to compute the envelope correlation hom the S-parameter descnplian of the antenna system. This approach ...
    • Feed-forward technique to measure the reflection coefficient under CW high-power signals 

      Collado Gómez, Juan Carlos; González Rodríguez, Marta; González Arbesú, José María; Mateu Mateu, Jordi; Verdú Tirado, Jordi; Hueltes Escobar, Alberto (IEEE Microwave Theory and Techniques Society, 2018-10-01)
      Article
      Accés obert
      This paper describes a measurement setup to obtain the reflection coefficient response over the frequency of a given device when this is subjected to a single-tone high-power (HP) signal. The proposed system is based on a ...
    • How to extract distributed circuit parameters from the scattering parameters of a transmission line 

      Orloff, Nathan D.; Popovic, Nina; Drisko, Jasper A.; Mateu Mateu, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Distributed circuit parameters parameterize the transmission and reflection off a given transmission line in terms of a distributed resistance, inductance, capacitance, and conductance, which are per-unit-length, ...
    • Multimode equivalent network representation for multiple arbitrarily shaped posts in H-plane waveguide 

      Ferrando Bataller, Miquel (1998)
      Text en actes de congrés
      Accés obert
      This paper presents a method for the calculation of the S-parameter of arbitrary shape and composition post or group of posts in a waveguide. The method segments the problem into regions that are characterized by their ...
    • New methods for determining the complex permittivity of different glucose concentrations by waveguide and antenna measurements at v-band 

      Cano García, Helena (Universitat Politècnica de Catalunya / King's College (University of London), 2013-09-10)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   King's College London
      [ANGLÈS] Diabetes is a metabolic disease that affects millions of people in the world. To control the status of this disease, diabetic patients have to measure continuously their glucose levels during all day. Nowadays, ...
    • Noise model of a reverse-biased Cold-FET applied to the characterization of its ENR 

      Maya Sánchez, Mª del Carmen; Lázaro Guillén, Antoni; Pradell i Cara, Lluís (JOHN WILEY & SONS INC, 2004-02-28)
      Article
      Accés obert
      This paper presents a broadband-noise circuit model for a cold-FET (Vds = 0 V) with a reverse-biased gate. The noise model includes two intrinsic uncorrelated noise-current sources whose spectral densities are determined ...