• Varactor-Tuned Dual-Mode Frequency Discriminator for Instantaneous Frequency Measurements 

      Moscoso Mártir, Álvaro; Molina-Fernández, Íñigo; Hong, Jiasheng (IEEE European Microwave Week, 2013)
      In this paper a novel varactor-tuned frequency discriminator that makes use of two tunable dual-mode microstrip resonators is demonstrated which doubles the discriminator tuning bandwidth. To prove its validity a prototype ...
    • Conducting a virtual ensemble with a kinect device 

      Rosa-Pujazon, Alejandro; Barbancho-Perez, Isabel; Tardón, Lorenzo J.; Barbancho-Perez, Ana Maria (KTH Royal Institute of Technology Sound and Music Computing Group, 2013)
      This paper presents a gesture-based interaction technique for the implementation of an orchestra conductor and a virtual ensemble, using a 3D camera-based sensor to capture user’s gestures. In particular, a human-computer ...
    • Virtual Conductor for String Quartet Practice 

      Baez, Raquel; Barbancho-Perez, Ana Maria; Rosa-Pujazon, Alejandro; Barbancho-Perez, Isabel; Tardón, Lorenzo J. (KTH Royal Institute of Technology Sound and Music Computing Group, 2013)
      This paper presents a system that emulates an ensemble conductor for string quartets. This application has been developed as a support tool for individual and group practice, so that users of any age range can use it to ...
    • Re-inventing Multimode Interference Couplers Using Subwavelength Gratings 

      Ortega Moñux, Alejandro; Halir, Robert; Maese Novo, Alejandro; Alonso-Ramos, C.; Zavargo-Peche, Luis; [et al.] (European Physical Society, IEEE, The Optical Society, 2013)
      We use the concept of subwavelength grating (SWG) refractive-index-engineering to propose and experimentally demonstrate a reduced size, slotted 2x2 MMI coupler. We also present an ultra-broadband 2x2 MMI coupler which ...
    • Engineering the optical properties of silicon using sub-wavelength structures 

      Halir, Robert; Ortega Moñux, Alejandro; Maese-Novo, Alejandro; Pérez-Galacho, Diego; Zavargo-Peche, Luis; [et al.] (IEEE Photonics Society, 2013)
      In most integrated optics platforms, including silicon-on-insulator, only minor modifications in refractive index are possible. The geometry of the waveguiding structure is thus the only degree of freedom for the design ...
    • A general approach for robust integrated polarization rotators 

      Alonso-Ramos, C.; Halir, Robert; Ortega Moñux, Alejandro; Cheben, Pavel; Vivien, Laurent; [et al.] (International Society for Optics and Photonics, 2013)
      Integrated polarization rotators suffer from very high sensitivity to fabrication errors. A polarization rotator scheme that substantially increases fabrication tolerances is proposed. In the proposed scheme, two tunable ...
    • Discriminador de frecuencia basado en resonadores “dual-mode” sintonizables 

      Moscoso Mártir, Álvaro; Molina Fernández, Íñigo; Hong, Jiasheng (2013-09)
      In this paper a novel varactor-tuned frequency discriminator that makes use of two tunable dual-mode microstrip resonators is demonstrated. In this circuit, the two tuned modes of the resonators are used independently to ...
    • Caracterización y Simulación de un Diodo Schottky de Microondas 

      Moreno Pozas, Laureano; Durán Valdeiglesias, Elena; Ávila Ruiz, Juan Manuel; Molina Fernández, Íñigo (2013-09)
      Microwave diode models included in commercial simulators use a large set of parameters, so they are often difficult to set up in order to match the actual response of a specific device. In this paper a simple model for a ...
    • Network Anomaly Classification by Support Vector Classifiers Ensemble and Non-linear Projection Techniques 

      De la Hoz, Emiro; Ortiz-Garcia, Andres; Ortega, Julio; De la Hoz, Eduardo (Springer, 2013-09)
      Network anomaly detection is currently a challenge due to the number of different attacks and the number of potential attackers. Intrusion detection systems aim to detect misuses or network anomalies in order to block ports ...
    • Secure Distributed System inspired by Ant Colonies for Road Traffic Management in Emergency Situations 

      Peinado-Dominguez, Alberto; Ortiz-Garcia, Andres; Munilla-Fajardo, Jorge (2013-09-04)
      In this work, we present a distributed system designed for road traffic management. The system is inspired by the behavior of the ant colonies. The distributed design responds to the particular limitations of an emergency ...
    • Consideraciones sobre el amplificador distribuido como amplificador de potencia 

      Ng-Molina, Francisco Yak; Martin-Guerrero, Teresa María; Camacho-Peñalosa, Carlos (2013-09-12)
      In this contribution, a short review of independent research activities on distributed power amplification is presented. An analysis of the intrinsic limitations of distributed power amplifiers serves as a guideline to ...
    • Estudio de la capacidad del canal en enlaces ópticos atmosféricos modelados con distribución M 

      Garrido-Balsells, José María; Jurado-Navas, Antonio; Pari- Ángel, José Francisco; Castillo-Vazquez, Miguel; Puerta-Notario, Antonio (Universidad Santiago de Compostela, 2013-09-13)
      En esta comunicación, ser realiza un estudio de parámetros importantes en la caracterización del comportamiento de enlaces de comunicaciones ópticas atmosféricas. En este sentido, se han derivado expresiones matemáticas ...
    • Arrays planares basados en el elemento strip-slot complementario 

      Abdo-Sánchez, Elena; Martin-Guerrero, Teresa Maria; Page de la Vega, Juan Enrique; Esteban Marzo, Jaime; Camacho-Peñalosa, Carlos (2013-09-13)
      Recently, the authors introduced a novel planar radiating element that exploits the characteristics of the slotline microstrip coupling to obtain a microstrip-fed slot with broadband matching. This paper reviews the main ...
    • Correction system for polyphonic piano recordings 

      Martin Erdozain, Maria Isabel; Barbancho-Perez, Isabel; Rosa-Pujazon, Alejandro; Barbancho-Perez, Ana Maria (2013-09-17)
      n this paper, a support tool for piano rehearsal is presented. The system analyses a given piano polyphonic recording to find the times, pitch and duration of the notes and figures played, taking into account the ...
    • Molding silicon waveguide devices with sub-wavelength structures 

      Halir, Robert; Ortega Moñux, Alejandro; Maese-Novo, Alejandro; Pérez-Galacho, Diego; Molina-Fernández, Íñigo; [et al.] (2013-09-18)
    • Análisis y Diseño de Filtros Paso Banda con Alta Selectividad Espectral Basados en Líneas de Transmisión Multiconductoras 

      Sánchez-Martínez, Juan José; Márquez-Segura, Enrique (2013-09-19)
      A new wideband planar bandpass filter consists of two series wire-bonded multiconductor transmission lines (MTL) and a shunt short-circuited MTL is presented and analyzed. A comprehensive study of the proposed topology ...
    • Underwater acoustic networks 

      Poncela, Javier (2013-11-11)
      Wireless underwater acoustic communication systems have become one of the most promising technologies for the development and deployment of future ocean observation and sensor networks. Applications range from oil prospecting ...
    • Distributed Amplifiers in MMIC Technology based on Composite Right/Left-Handed Transmision Lines 

      Martin-Guerrero, Teresa María; Palombini, Diego; Mata-Contreras, Francisco Javier; Bentini, Andrea; Ng-Molina, Francisco Yak; [et al.] (2013-11-13)
      Abstract – Three MMIC distributed amplifiers based on Composite Right/Left-Handed Transmission Lines are presented in order to illustrate the actual performance of these devices, and the features that can be obtained with ...
    • Butler Matrix Based Six-port Passive Junction 

      Moscoso Mártir, Álvaro; Ávila Ruiz, Jose Manuel; Durán Valdeiglesias, Elena; Moreno Pozas, Laureano; Molina Fernández, Íñigo; [et al.] (2014-02-03)
      In this work we propose the utilization of the Butler matrix as a six-port I/Q demodulator. The inherent symmetry of its topology allows to overcome the intrinsic amplitude and phase imbalances of the traditional approaches ...
    • Robust and tunable integrated polarization rotator 

      Alonso-Ramos, C.; Halir, Robert; Ortega Moñux, Alejandro; Cheben, Pavel; Vivien, Laurent; [et al.] (2014-03-11)
      Integrated polarization rotators suffer from very high sensitivity to fabrication errors. A polarization rotator scheme that substantially increases fabrication tolerances is proposed. In the proposed scheme, two tunable ...