Now showing items 1-20 of 85

    • A dual band circularly polarized antenna based on a microstrip patch filled with left-handed structures 

      Herraiz Martínez, Francisco Javier; González Posadas, Vicente; Segovia Vargas, Daniel (Sin editorial (Edimburgo, Reino Unido), 11/11/2007)
      Microstrip patches filled with left-handed structures are proposed to obtain dual band circularly polarized antennas. The proposed antennas have two modes at different frequencies with similar characteristics to the ...
    • A passive temperature sensor based on a printed magnetoinductive-wave (MIW) delay line 

      Herraiz Martínez, Francisco Javier; Martínez Cebrián, Javier; Segovia Vargas, Daniel (Sin editorial (París, Francia), 06/09/2015)
      Novel fully passive and electromagnetic sensors are proposed. These sensors are implemented with magnetoinductive-wave (MIW) delay lines. Such lines are composed of a periodic array of coupled square split ring resonators ...
    • An IoT reader for wireless passive electromagnetic sensors 

      Galindo Romera, Gabriel; Carnerero Cano, Javier; Martínez Martínez, José Juan; Herraiz Martínez, Francisco Javier (01/04/2017)
      In the last years, many passive electromagnetic sensors have been reported. Some of these sensors are used for measuring harmful substances. Moreover, the response of these sensors is usually obtained with laboratory ...
    • Application of the left-handed half-ioop antenna with wideband tuning to a cognitive radio terminal 

      Herraiz Martínez, Francisco Javier; Hall, Peter S.; Segovia Vargas, Daniel (Sin editorial (Barcelona, España), 12/04/2010)
      A compact system for future communication terminals (Cognitive Radio) is presented in this paper. This system is based on two antennas printed on the same substrate board. The total dimensions of the board are 60 mm × 60 ...
    • Arrays of dual-band printed dipoles loaded with metamaterial particles 

      Herraiz Martínez, Francisco Javier; García Muñoz, Luis Enrique; Segovia Vargas, Daniel; González Ovejero, David; Craeye, Christophe (Sin editorial (Berlín, Alemania), 23/03/2009)
      Arrays of printed dipoles loaded with metamaterial particles are presented in this paper. The use of these loaded dipoles can improve the features of the arrays. Two applications are proposed: the miniaturization of the ...
    • Bandwidth limitations of ultra high frequency-radio frequency identification tags 

      Zamora González, Gerard; Paredes Marco, Ferran; Herraiz Martínez, Francisco Javier; Martín Antolín, Ferran; Bonache Albacete, Jordi (16/07/2013)
      Fundamental bandwidth limitations on the design of ultra high frequency (UHF) radio frequency identification (RFID) tags are investigated. This study was conducted by considering the optimum equivalent-circuit network ...
    • Campos Electromagnéticos 

      Centeno Hernáez, Efraim; Herraiz Martínez, Francisco Javier; Vargas Castrillón, Silvia (04/09/2020)
    • Campos Electromagnéticos 

      Arribas Fernández, Paula; Centeno Hernáez, Efraim; Fernández Bernal, Fidel; Herraiz Martínez, Francisco Javier; Malagón Luque, Constantino; Picatoste Calvo, Enrique; Vargas Castrillón, Silvia (04/09/2020)
    • Campos Electromagnéticos 

      Arribas Fernández, Paula; Centeno Hernáez, Efraim; Fernández Bernal, Fidel; Herraiz Martínez, Francisco Javier; Malagón Luque, Constantino; Rodríguez Marrero, José Luis; Vargas Castrillón, Silvia (05/05/2020)
    • Campos Electromagnéticos 

      Herraiz Martínez, Francisco Javier (08/01/2018)
    • Campos Electromagnéticos 

      Fernández Bernal, Fidel; Herraiz Martínez, Francisco Javier (06/09/2019)
    • Campos Electromagnéticos 

      Centeno Hernáez, Efraim; Herraiz Martínez, Francisco Javier; Vargas Castrillón, Silvia (01/09/2021)
    • Campos Electromagnéticos 

      Arribas Fernández, Paula; Centeno Hernáez, Efraim; Herraiz Martínez, Francisco Javier; Malagón Luque, Constantino; Picatoste Calvo, Enrique; Vargas Castrillón, Silvia (01/09/2021)
    • Campos Electromagnéticos 

      Centeno Hernáez, Efraim; Herraiz Martínez, Francisco Javier; Vargas Castrillón, Silvia (01/09/2022)
    • Campos Electromagnéticos 

      Arribas Fernández, Paula; Centeno Hernáez, Efraim; Fernández Hernández, Jorge; Herraiz Martínez, Francisco Javier; Iglesias Jiménez, Eduardo; Malagón Luque, Constantino; Picatoste Calvo, Enrique; Vargas Castrillón, Silvia (01/09/2022)
    • Campos Electromagnéticos 

      Centeno Hernáez, Efraim; Herraiz Martínez, Francisco Javier; Iglesias Jiménez, Eduardo; Malagón Luque, Constantino; Martínez Vílchez, Oibar; Picatoste Calvo, Enrique; Vargas Castrillón, Silvia (01/09/2023)
    • Campos Electromagnéticos 

      Centeno Hernáez, Efraim; Herraiz Martínez, Francisco Javier; Martínez Vílchez, Oibar; Vargas Castrillón, Silvia (01/09/2023)
    • Chipless RFID system based on magnetoinductive-wave (MIW) delay lines 

      Herraiz Martínez, Francisco Javier; Ugarte Muñoz, Eduardo; Segovia Vargas, Daniel; Paredes Marco, Ferran; Zamora González, Gerard; Martín Antolín, Ferran; Bonache Albacete, Jordi (Sin editorial (Nagoya, Japón), 29/10/2012)
      A novel fully passive and electromagnetic chipless radiofrequency identification (RFID) system is proposed. The system is based on printed tags implemented with magnetoinductive-wave (MIW) delay lines. Such lines are ...
    • Chipless RFID tags based on magneto-inductive or electro-inductive delay lines 

      Herraiz Martínez, Francisco Javier; González Moreno, Alvaro; Segovia Vargas, Daniel (Sin editorial (Dubrovnik, Croacia), 14/10/2013)
      Novel fully passive and electromagnetic chipless tags are proposed. These tags are implemented with magnetoinductive-wave (MIW) delay lines. Such lines are composed of a periodic array of coupled square split ring resonators ...
    • Design and characterization of a passive temperature sensor based on a printed MIW delay line 

      Martínez Martínez, José Juan; Herraiz Martínez, Francisco Javier; Galindo Romera, Gabriel (15/11/2016)
      A passive electromagnetic temperature sensor based on a magneto-inductive wave (MIW) delay line is presented. The working principle is the following: a reader sends a pulse in the time domain to the sensor, which produces ...