Browsing by Subject "Microwave circuits"

Now showing items 1-20 of 54

    • A multistate single-connection calibration for microwave microfluidics 

      Orloff, Nathan D.; Ma, Xiao; Little, Charles A. E.; Mateu Mateu, Jordi (IEEE Microwave Theory and Techniques Society, 2018-02)
      Article
      Open Access
      With emerging medical, chemical, and biological applications of microwave-microfluidic devices, many researchers desire a fast and accurate calibration that can be achieved in a single connection. However, traditional ...

    • Amplificador Wi-fi 

      Fernandez Ducable, Didac (Universitat Politècnica de Catalunya, 2008-02)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Este trabajo explica detalladamente el proceso de fabricación de un circuito de Microondas, es decir; que opera a altas frecuencias. En él, se ha detallado específicamente todos los pasos que se deben dar para que dicho ...

    • Análisis de geometrías fractales para resonadores microstrip 

      Extremera Extremera, Manuel Jesus (Universitat Politècnica de Catalunya, 2016-02-25)
      Master thesis (pre-Bologna period)
      Open Access
      Usage and popularity growth of communications satellites has increased the interest on filter synthesis research. Nowadays, the improvement of the trade-off between size, weight, cost and performance is the golden rule. ...

    • Automatización y control de un motor a pasos para la sintonización de filtros de microondas 

      Benet Freissinier, Josep (Universitat Politècnica de Catalunya, 2010-12-15)
      Master thesis (pre-Bologna period)
      Open Access
      Català: L'objectiu del projecte és ajustar de forma automàtica la freqüència central de un ressonador de microones a la freqüència que desitgi l'usuari. Per aconseguir-ho, s'introdueix la freqüència desitjada al software ...

    • Caracterización de estructuras finline en banda K mediante la técnica de calibración TRL 

      Martorell, J. M.; Pradell i Cara, Lluís (1990)
      Conference report
      Open Access

    • 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
      Open Access
      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 ...

    • Circuit model for coplanar-slotline tees 

      Ribó i Pal, Miquel; Pradell i Cara, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-05-31)
      Article
      Open Access
      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 coplanar-slotline tees 

      Ribó i Pal, Miquel; Pradell i Cara, Lluís (2000-05)
      Article
      Open Access
      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 mode conversion in coplanar waveguide assymmetric shunt impedances 

      Ribó i Pal, Miquel; Pradell i Cara, Lluís (IEE-INST ELEC ENG, 1999-04-30)
      Article
      Open Access
      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 ...

    • Combining SMOS with visible and near/shortwave/thermal infrared satellite data for high resolution soil moisture estimates 

      Sanchez Ruiz, Sergio; Piles Guillem, Maria; Sanchez, Nilda; Martinez Fernandez, Jose; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José (Elsevier, 2014-08-04)
      Article
      Restricted access - publisher's policy
      Sensors in the range of visible and near-shortwave-thermal infrared regions can be used in combination with passive microwave observations to provide soil moisture maps at much higher spatial resolution than the original ...

    • Conmutador de microondas con transistor MESFET encapsulado 

      Comerón Tejero, Adolfo; Elias Fusté, Antoni (1985)
      Conference report
      Open Access
      A packaged GaAs MESFET has been used to implement a fast switch at frequencies around 12 GHz. The insertion loss in the ON state is approximately 2 dB between 9 and 13 GHz. In the OFF state the insertion loss can be higher ...

    • Contribucions a instruments per a reflectometria de senyals de posicionament global 

      Onrubia Ibáñez, Raúl (Universitat Politècnica de Catalunya, 2014-12)
      Master thesis
      Restricted access - publisher's policy
      [ANGLÈS] The thesis presents 4 papers written about the contributions made to two different instruments being developed at RSLab, mainly at hardware level. The first instrument is a dual-band (L1 and L5) conventional and ...

    • Desenvolupament de BALUNS multimodals basats en tes coplanars 

      Queralt Jarne, Martí (Universitat Politècnica de Catalunya, 2016)
      Master thesis (pre-Bologna period)
      Open Access

    • Desenvolupament i estudi comparatiu d'oscil·ladors locals per a un radiòmetre en banda L 

      Castro Ríos, Eva (Universitat Politècnica de Catalunya, 2016-09)
      Master thesis (pre-Bologna period)
      Open Access
      This thesis has been developed in the frame of the ESA scientific mission SMOS. Its purpose is to retrieve data about the soil moisture and ocean salinity in order to track extreme meteorological phenomena and to improve ...

    • Design and testing of microwave circuits for optimized radio over fiber data transmission 

      Ucar, Yilmaz (Universitat Politècnica de Catalunya, 2021-02)
      Master thesis
      Open Access
      Inevitable increase in number of wireless communication users led to search for solutions to provide higher bandwidth requirement. Most famous candidate is Radio-over-Fiber systems to fulfil bandwidth necessity even though ...

    • Design of a Chipless Harmonic Radar Temperature Sensor 

      Romeu Gómez, Jordi (Universitat Politècnica de Catalunya / Technische Universität Darmstadt, 2013-09-10)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Technische Universität Darmstadt
      [ANGLÈS] Passive chipless wireless sensor tags are used in environments with specific conditions where chips, wires or power supplies cannot be used. Nowadays a huge part of these sensors use Surface Acoustic Wave (SAW) ...

    • Design of a Temperature Sensitive Band Pass Filter for a Chipless Harmonic Radar Sensor 

      Romeu Gómez, Jordi (Universitat Politècnica de Catalunya / Technische Universität Darmstadt, 2013-09-26)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] Passive chipless wireless sensor tags are used in environments with specific conditions where chips, wires or power supplies cannot be used. Nowadays a huge part of these sensors use Surface Acoustic Wave (SAW) ...

    • Design of planar probes for stent monitoring 

      Amorós García de Valdecasas, Susana (Universitat Politècnica de Catalunya, 2016-07-28)
      Master thesis (pre-Bologna period)
      Restricted access - confidentiality agreement

    • Design, fabrication and characterization of Bulk Acoustic Wave Resonators 

      Calleja Luque, Mònica (Universitat Politècnica de Catalunya, 2020-06)
      Bachelor thesis
      Open Access
      Covenantee:   University of Colorado Colorado Springs
      The constant demand for higher speed and larger bandwidths together with the massive development of personal communications systems, navigation, satellite communications as well as personal computer and data processing ...

    • Development and experimental characterization of frequency-reconfigurable microwave amplifiers 

      Carrera Escalé, Pol (Universitat Politècnica de Catalunya, 2019-07)
      Bachelor thesis
      Open Access
      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 ...