RF & Microwave Systems, Devices and Materials Group - Microwave Systems

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International Journals

  1. A. Lázaro, L. Pradell, J.M. O’Callaghan “FET Noise-Parameter Determination Using a Novel Technique Based on 50 Ohm Noise-Figure Measurements” IEEE Transactions on Microwave Theory and Techniques Volumen 47, no. 3. pp. 315-324, March-1999
  2. M.Ribó, J. De la Cruz, L. Pradell, “Circuit model for mode conversion in coplanar waveguide asymmetric series-impedances”, Electronics Letters, Vol. 35, No. 21, pp. 1851-1855, Oct-1999
  3. M.Ribó, J. De la Cruz, L. Pradell, “Circuit model for slotline-to-coplanar waveguide asymmetrical transitions”, Electronics Letters, Vol. 35, No. 14, pp. 1153-1155, July-1999
  4. M.Ribó, L. Pradell, “Circuit model for mode conversion in coplanar waveguide asymmetric shunt impedances”, Electronics Letters, Vol. 35, No. 9, pp. 713-715, April-1999
  5. M. Ribó, L. Pradell “Circuit model for Coplanar –Slotline Tees”. IEEE Microwave and Guided Wave Letters Vol: 10 no. 5 pp:: 177-179 May-2000
  6. M. Ribó, L. Pradell “Circuit model for a Coplanar –Slotline Cross”. IEEE Microwave and Guided Wave Letters Vol. 10 no. 12 Pp. 511-513 Dec-2000
  7. A. Barlabé, A. Comerón, L. Pradell “Generalized Transverse Resonance Analysis of Planar Discontinuities Considering the Edge Effect”. IEEE Microwave and Guided Wave Letters Vol. 10 no. 12 pp: 517-: 519 Dec-2000
  8. F. Purroy, L. Pradell “ New Theoretical Analysis of the LRRM Calibration Technique for Vector Network Analyzers” IEEE Transactions on Instrumentation and Measurement Vol. 50 no. 5 pp: 1307- 1314: Oct-2001
  9. A. Lázaro, M.C. Maya, L. Pradell ” Measurement of on-wafer Transistor Noise Parameters without a Tuner using unrestricted Noise Sources ” Microwave Journal Vol. 45 no. 3 pp 20-46 March-2002
  10. A. Velázquez, A. Lázaro, L. Pradell, A. Comeron ” Application of CAD-Load Pull Techniques in Mixer Design ” Microwave and Optical Technology Letters Vol. 36 no. 4 pp 320- 323 Feb-2003
  11. M.C. Maya, A. Lázaro, L. Pradell ” Extraction of an avalanche diode noise model for its application as on-wafer noise source” Microwave and Optical Technology Letters Vol. 38 no. 2 pp 89-92 July-2003
  12. A. Lázaro , M.C. Maya, L. Pradell ” Bias-dependence of FET intrinsic noise sources, determined with a quasi-2D model” Microwave and Optical Technology Letters Vol. 39 no. 4 pp 317-319 Nov-2003
  13. M.C. Maya, A. Lázaro, P. de Paco, L. Pradell “A method for characterizing coplanar waveguide-to-microstrip transitions, and its application to the measurement of microstrip devices with coplanar microprobes” Microwave and Optical Technology Letters Vol. 39 no. 5 pp 373-378, Dec-2003
  14. M.C. Maya, A. Lázaro, L. Pradell “Model of a reverse-biased Cold-FET applied to the characterization of its ENR” Microwave and Optical Technology Letters Vol. 40 no. 4 pp 326-330 Feb-2004
  15. M.C. Maya, A. Lázaro, L. Pradell “A Method for the Determination of a Distributed FET Noise-Model, Based on Matched-Source Noise Figure Measurements” Microwave and Optical Technology Letters Vol. 41 no. 3 pp 221- 225 May-2004
  16. D. Girbau, A. Lázaro, L. Pradell “Characterization of dynamics and power handling of RF MEMS using vector measurement techniques” IEEE Transactions on Microwave Theory and Techniques Vol. 52 no. 11 pp 2627-2633 Nov-2004
  17. B. Aja, E. Artal, L. de la Fuente, J.P. Pascual, A. Mediavilla, N. Roddis, D. Kettle, F. Winder, L. Pradell, P. de Paco “Very Low-Noise Differential Radiometer at 30 GHz for the PLANCK LFI ” IEEE Transactions on Microwave Theory and Techniques Vol. 53 no. 6 pp 2050 – 2062 June-2005
  18. B. Aja, J.P. Pascual, L. de la Fuente, M. Detratti, E. Artal, A. Mediavilla, P. de Paco, L. Pradell “Planck-LFI 44-GHz Back End Module” IEEE Transactions on Aerospace and Electronic Systems Vol. 41 no. 4 pp 1415-1430 Oct.-2005
  19. A. Lázaro, D. Girbau, L. Pradell “Distortion Produced by RF MEMS Varators on Digital Communication Signals” Microwave and Optical Technology Letters Vol. 48 no. 2, pp. 246- 249 Feb-2006
  20. D. Girbau, N. Otegi, L. Pradell, A. Lázaro “Study of Intermodulation in RF MEMS Variable Capacitors ” IEEE Transactions on Microwave Theory and Techniques Vol. 54 no. 3 pp 1120 -1130 March-2006
  21. M.C. Maya, A. Lázaro, L. Pradell “A Method to Simultaneously Extract the Small-Signal Equivalent Circuit and Noise Parameters of Heterojunction Bipolar Transistor” Microwave and Optical Technology Letters Volume 48, Issue 7, July 2006, Pages: 1372-1379
  22. A. Lázaro, D. Girbau, L. Pradell, A. Nebot “Nonlinear actuation model for lateral electrostatically-actuated DC-contact RF MEMS series switches” Microwave and Optical Technology Letters. Volume 49, Issue 6, June 2007, Pages: 1238-1241
  23. D. Girbau, M.A. Llamas, J. Casals-Terré, X. Simó-Selvas, L. Pradell, A. Lázaro “A Low-Power Consumption Out-of-Plane Electrothermal Actuator” IEEE Journal of Microelectromechanical Systems, Volume 16, Issue 3, June 2007 Page(s): 719 – 727
  24. D. Girbau, L. Pradell, A. Lázaro, A. Nebot “Electrothermally-actuated RF MEMS switches suspended on a low-resistivity substrate ” IEEE Journal of Microelectromechanical Systems, Volume 16, Issue 5, Oct. 2007 Page(s): 1061 – 1070
  25. Fargas-Marques, A.; Casals-Terre, J.; Shkel, A.M.; Resonant Pull-In Condition in Parallel-Plate Electrostatic Actuators Journal of Microelectromechanical Systems, Volume 16, Issue 5, Oct. 2007 Page(s):1044 – 1053
  26. D. Girbau, L. Pradell, A. Lázaro, A. Nebot “Electrothermally-actuated RF-MEMS suspended parallel switch” Microwave and Optical Technology Letters. Volumen: 49, no. 12. pp 2894-2896. December-2007
  27. J. El Hadad, A. Barlabé, A. Comerón “Minimization of the relative convergence phenomenon in the analysis of finline step discontinuities using the weighting functions that incorporate the edge effect in the GTR method” International Journal of Microwave and Optical Technology. Vol. 3 no. 2, pp 106-109, April 2008
  28. Casals-Terre, J.; Fargas-Marques, A.; Shkel, A.M. “Snap-Action Bistable Micromechanisms Actuated by Nonlinear Resonance”Journal of Microelectromechanical Systems, Volume 17, Issue 5, Oct. 2008 Page(s):1082 – 1093
  29. D. Girbau, L. Pradell, A. Lázaro, D. Peyrou, P. Pons, P. Calmon, R. Plana, F. Coccetti “A method for characterization of intermodulation distortion produced in MEMS switches” Microwave and Optical Technology Letters. Volumen: 51 no. 2. pp. 526-529. February 2009
  30. D. Girbau, A.Lazaro, A. Pérez, L. Pradell “Dual-band bandpass filter based on a hole resonator” Microwave and Optical Technology Letters. Vol: 51 no.7, pp. 1649-1652. July-2009.
  31. Llamas, M.A.; Ribó, M.; Girbau, D.; Pradell, L. “A Rigorous Multimodal Analysis and Design Procedure of a Uniplanar 180º Hybrid” IEEE Transactions on Microwave Theory and Techniques, Volume 57, Issue 7, Page(s): 1832 – 1839. July 2009
  32. D. Girbau, A. Lázaro, E. Martínez, D. Masone, L. Pradell “Tunable dual-band bandpass filter for WLAN applications”. Microwave and Optical Technology Letters. Volumen: 51 no. 9, pp. 2025-2028 September-2009
  33. Z. Brito, I. Llamas, L. Pradell “Selectivity-tuned bandpass filter”. IEE Electronics Letters. Volume 45, Issue 19, Page(s): 984 – 985. September 2009
  34. Z. Brito, I. Llamas, L. Pradell “Precise frequency and bandwidth control of microstrip switchable bandstop filters”. Microwave and Optical Technology Letters. Volume 51, Issue 11, November 2009, Pages: 2573-2578
  35. Artal E, Aja B, de la Fuente ML, Pascual JP, Mediavilla A, Martinez-Gonzalez E, Pradell L, de Paco P, Bara M, Blanco E, Garcia E, Davis R, Kettle D, Roddis N, Wilkinson A, Bersanelli M, Mennella A, Tomasi M, Butler RC, Cuttaia F, Mandolesi N, Stringhetti L. “LFI 30 and 44 GHz receivers Back-End Modules”. Journal of Instrumentation 2009; vol. 4, December-2009. http://iopscience.iop.org/1748-0221/4/12/T12003
  36. Musoll, C.; Llamas-Garro, I.; Brito-Brito, Z.; Pradell, L.; Corona-Chavez, A. “Fully Adaptable Bandstop Filter using Varactor Diodes”. Microwave and Optical Technology Letters Vol. 52, no. 3, pp. 554-558, March 2010
  37. M. A. Llamas, D.,Girbau, M. Ribó, L. Pradell, A. Lázaro, F. Giacomozzi, B. Margesin “MEMS-based 180º Phase Switch for Differential Radiometers”. IEEE Transactions on Microwave Theory and Techniques. Vol: 58 no. 5  pp. 1264-1272,  May-2010
  38. P. Rodriguez-Cepeda, M. Ribó, F.J. Pajares, A.M. Sanchez, J.R. Regué, L. Pradell “A new compact bandpass filter based on an asymmetric short-circuited spurline resonator”. Microwave and Optical Technology Letters Vol. 52, No. 6, June 2010, pp. 1328-1331
  39. Brito-Brito, Z.; Llamas-Garro, I.; Navarro-Muñoz, G, Perruiseau-Cartier, Pradell, L.  ‘Switchable Bandpass Filter for WiFi – UMTS Reception Standards’ Electronics Letters, Vol. 46, No. 13, pp. 1-2, June 2010. DOI: 10.1049/el.2010.0638
  40. D. Girbau, A. Lázaro, A. Pérez, E. Martínez, L. Pradell, R. Villarino “Tunable Dual-Band Resonators for communication systems”. International Journal of Microwave and Wireless Technologies, volume 2, issue 3-4, pp. 245-253, june-august 2010 (Special Issue on European Microwave Week 2009) DOI:10.1017/S175907871000036X
  41. J.A. Tauber, (…). L. Pradell, (…) “Planck pre-launch status: The Planck mission”. Astronomy and Astrophysics (ISSN: 00046361), vol.  520, Issue 1, 15 September 2010, Article number aa12983-09 . DOI: 10.1051/0004-6361/200912983
  42. Aline Jaimes-Vera, Ignacio Llamas-Garro, Maolong Ke, Yi Wang, Michael J. Lancaster, Lluís Pradell. “Polymer Based Micromachined Rectangular Coaxial Filters for Millimeter-wave Applications”. International Journal of Microwave and Wireless Technologies, vol. 3, Issue 2, pp.115-120, April 2011. DOI:10.1017/S1759078711000079
  43. M. A. Llamas, D.Girbau, M. Ribó, L. Pradell, F. Giacomozzi, S. Colpo “RF-MEMS Uniplanar 180º Phase Switch Based on a Multimodal Air-Bridged CPW Cross”. IEEE Transactions on Microwave Theory and Techniques. Vol. 59,  no. 7,  pp. 1769-1777,  July-2011. DOI: 10.1109/tmtt.2011.2140125
  44. Z. Brito, I. Llamas-Garro, G. Navarro-Muñoz, J. Perruisseau-Carrier, L. Pradell, F. Giacomozzi, S. Colpo “Precise Frequency and Bandwidth Control of Switchable Microstrip Bandpass Filters using Diode and MEMS Technologies,” IET Microwaves, Antennas & Propagation, Vol. 6 no. 6 pp. 713-719, 2012. DOI: 10.1049/iet-map.2012.0077
  45. I. Llamas-Garro, Z. Brito-Brito, L. Pradell, F. Giacomozzi, S. Colpo ‘Discretely Tuned RF-MEMS Bandstop Filter with Wide Tuning Range and Uniform High Rejection’ Electronics Letters, Vol. 48 no. 17, pp. 1065 – 1067, August-2012. DOI: 10.1049/el.2012.2270
  46. A. Contreras, M. Ribó, L. Pradell, P. Blondy, “Uniplanar Bandpass Filters Based on Multimodal Immitance Inverters and End-Coupled Slotline Resonators”. IEEE Transactions on Microwave Theory and Techniques, vol. 61, pp. 77-88, January-2013. DOI: 10.1109/tmtt.2012.2226743
  47. A. Contreras, M. Ribó, L. Pradell, J. Casals-Terré, F. Giacomozzi and J. Iannacci, “K-band RF-MEMS uniplanar reconfigurable bandwidth bandpass filter using multimodal immittance inverters”. Electronics Letters, vol. 49 No. 11, May 2013. DOI: 10.1049/el.2013.0681
  48. Mitra Gilasgar, Antoni Barlabé, and Lluís Pradell “Highly Efficient Class-F RF Power Amplifiers with Very Low Distortion” The Radio Science Bulletin ( ISSN 1024-4530) no 347, pp. 21-31, December 2013