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Your search keyword '"Marante, Reinel"' showing total 23 results
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23 results on '"Marante, Reinel"'

1. Newton novel magnetic instrument. Potential application to unveil key questions as the origin of the Moon

Author

Mesa Uña, José Luis, primary, Díaz Michelena, Marina, additional, de Frutos Hernánsanz, Francisco Javier, additional, Aroca Hernández-Ros, Claudio, additional, Pérez Jiménez, Marina, additional, Maicas Ramos, Marco, additional, Sanz Lluch, María del Mar, additional, Lavín García, Cristina, additional, Marante, Reinel, additional, Langlais, Benoit, additional, Kilian, Rolf, additional, and Rivero, Miguel Ángel, additional

Published
2020
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2. New magnetometric devices for planetary exploration

Author

Mesa Una, Jose Luis, primary, Arlensu Ordonez Cencerrado, Amanda, additional, Michelena, Marina Diaz, additional, Perez Jimenez, Marina, additional, Hernandez-Ros, Claudio Aroca, additional, Lavin Garcia, Cristina, additional, Marante, Reinel, additional, and Gonzalez, Laura, additional

Published
2019
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3. Transmisor outphasing en UHF usando amplificadores clase E a GaN HEMT

Author

Marante, Reinel, García, José Angel, Ruíz, Maria Nieves, Gilabert Pinal, Pere Lluís, Montoro López, Gabriel, Universidad de Cantabria, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, and Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions

Subjects
Power amplifiers, Amplificadors de potència, Enginyeria electrònica::Electrònica de potència [Àrees temàtiques de la UPC], Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Circuits de microones, radiofreqüència i ones mil·limètriques [Àrees temàtiques de la UPC], Microwaves, Microones
Abstract

A Chireix outphasing transmitter at UHF band is presented in this paper, based on class E RF power amplifiers. As recently proved in [1], properly transforming the load modulation path, imposed by the non-isolated combiner, into fundamental frequency impedan ce values at the device drain terminals as close as possible to those assuring zero voltage switching condition, good efficiency values may be kept along a significant output power range. A lumped element implementation of the amplifiers and the combiner, together with the use of GaN HEMTs, allowed controlling the output power over a 6 dB range with an efficiency value over 60%. Experiments with asymmetrical two tones, conceived as a discrete spectrum signal with a 1:4 envelope variation, have shown the capability of the arch itecture to be linearized using digital predistortion (DPD). In order to reproduce a spectrally efficient communication signal, with nulls in the envelope, a hybrid control strategy was employed, combining the outphasing between branches with amplitude variations of both RF excitation signals for the lower range of the envelope. Average drain efficiency and PAE values of 63% and 60.3% respectively have been measu red, for a 11.8 W and 5.06 dB PAPR WCDMA signal, while m eeting ACPR specifications.

Published
2012

4. Transmisor polar en UHF integrando un modulador de envolvente conmutado asistido por etapa lineal y un amplificador clase E a GaN HEMT

Author

Fernández Miaja, Pablo, Sebastián Zúñiga, Francisco Javier, Marante, Reinel, García García, José Ángel, and Universidad de Cantabria

Abstract

URSI 2012, XXVII Simposium Nacional de la Unión Científica Internacional de Radio, Elche, Spectrally efficient wireless communication standards impose stringent linearity specifications, which would require traditional IQ transmitters to operate with back-offed and power inefficient linear RF power amplifiers (PAs). In order to overcome such a significant limitation, alternative architectures have been proposed, as those based on the Envelope Elimination and Restoration (EER) technique. In this paper, a UHF polar transmitter is presented, combining switching and linear stages in the envelope amplifier as to achieve both great bandwidth and high efficiency, when drain modulating a GaN HEMT class E RF PA. Several tests, using EDGE, TETRA, and WCDMA standards have been performed with good results

Published
2012

5. A dual-band outphasing transmitter using broadband class E power amplifiers

Author

Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Ruiz, Maria Nieves, Marante, Reinel, Rizo, Leysi, García, José Angel, Gilabert Pinal, Pere Lluís, Montoro López, Gabriel, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Ruiz, Maria Nieves, Marante, Reinel, Rizo, Leysi, García, José Angel, Gilabert Pinal, Pere Lluís, and Montoro López, Gabriel

Abstract

In this paper, a dual-band outphasing transmitter (able of operating either at 770 MHz or 960 MHz frequency bands) is presented. Two broadband RF power amplifiers (PAs) have been designed over packaged GaN HEMT devices, switching close to the nominal zero-voltage and zerovoltage-derivative class E conditions. A reactive combiner, using transmission lines of appropriate electrical lengths at both bands, together with compensating reactances, allows positioning the drain impedance loci to produce high efficiency and good dynamic range profiles. Average drain efficiency figures over 68% and 38% have been measured for WCDMA signals with a peak-to-average power ratio (PAPR) of 5.1 dB and 8.4 dB, respectively., Peer Reviewed, Postprint (published version)

Published
2014

6. A low-complexity memoryless model for envelope tracking RF power amplifiers

Author

Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Montoro López, Gabriel, Gilabert Pinal, Pere Lluís, García García, José Ángel, Ruiz Lavin, Maria de las nieves, Marante, Reinel, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Montoro López, Gabriel, Gilabert Pinal, Pere Lluís, García García, José Ángel, Ruiz Lavin, Maria de las nieves, and Marante, Reinel

Abstract

This paper presents a new kind of behavioral model structure for characterizing static nonlinearities in dynamically supplied RF power amplifiers. The proposed architecture is based on the combination of several basic cells and it is focused to simplify the real-time design and implementation of adaptive shaping functions devoted to improve the efficiency in systems controlled by digital signal processors with tight computational capabilities, such is the case of handsets and small-cells., Peer Reviewed, Postprint (published version)

Published
2014

8. Transmisor outphasing en UHF usando amplificadores clase E a GaN HEMT

Author

Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Marante, Reinel, García, José Angel, Ruíz, Maria Nieves, Gilabert Pinal, Pere Lluís, Montoro López, Gabriel, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Marante, Reinel, García, José Angel, Ruíz, Maria Nieves, Gilabert Pinal, Pere Lluís, and Montoro López, Gabriel

Abstract

A Chireix outphasing transmitter at UHF band is presented in this paper, based on class E RF power amplifiers. As recently proved in [1], properly transforming the load modulation path, imposed by the non-isolated combiner, into fundamental frequency impedan ce values at the device drain terminals as close as possible to those assuring zero voltage switching condition, good efficiency values may be kept along a significant output power range. A lumped element implementation of the amplifiers and the combiner, together with the use of GaN HEMTs, allowed controlling the output power over a 6 dB range with an efficiency value over 60%. Experiments with asymmetrical two tones, conceived as a discrete spectrum signal with a 1:4 envelope variation, have shown the capability of the arch itecture to be linearized using digital predistortion (DPD). In order to reproduce a spectrally efficient communication signal, with nulls in the envelope, a hybrid control strategy was employed, combining the outphasing between branches with amplitude variations of both RF excitation signals for the lower range of the envelope. Average drain efficiency and PAE values of 63% and 60.3% respectively have been measu red, for a 11.8 W and 5.06 dB PAPR WCDMA signal, while m eeting ACPR specifications., Peer Reviewed, Postprint (published version)

Published
2012

9. Arquitecturas de transmisión inalámbrica de alta eficiencia

Author

Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Gilabert Pinal, Pere Lluís, García, José Angel, de Mingo, Jesús, Montoro López, Gabriel, Cabria, Lorena, Marante, Reinel, García, Paloma, Sánchez, César, Bertran Albertí, Eduardo, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Gilabert Pinal, Pere Lluís, García, José Angel, de Mingo, Jesús, Montoro López, Gabriel, Cabria, Lorena, Marante, Reinel, García, Paloma, Sánchez, César, and Bertran Albertí, Eduardo

Abstract

Postprint (published version)

Published
2011

10. Técnicas Emergentes de Mejora del Compromiso Eficiencia-Linealidad en Transmisores de Radiofrecuencia

Author

Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Gilabert Pinal, Pere Lluís, García, José Angel, de Mingo, Jesús, Montoro López, Gabriel, Cabria, Lorena, Marante, Reinel, García, Paloma, Sánchez, César, Bertran Albertí, Eduardo, Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions, Universitat Politècnica de Catalunya. CMC - Control, Monitorització i Comunicacions, Gilabert Pinal, Pere Lluís, García, José Angel, de Mingo, Jesús, Montoro López, Gabriel, Cabria, Lorena, Marante, Reinel, García, Paloma, Sánchez, César, and Bertran Albertí, Eduardo

Abstract

Postprint (author’s final draft)

Published
2009

23. GaN HEMT Class \E^2 Resonant Topologies for UHF DC/DC Power Conversion.

Author

Garcia, José A., Marante, Reinel, and de las Nieves Ruiz Lavin, María

Subjects
*RESONANT vibration, *TOPOLOGY, *RADIO frequency, *GALLIUM, *MODULATION-doped field-effect transistors, *ELECTRIC current rectifiers
Abstract

In this paper, the design and performance of class \E^2 resonant topologies for dc/dc power conversion at UHFs are considered. Combining the use of RF gallium–nitride HEMT devices, both for the inverter and synchronous rectifier, with high-Q lumped-element terminating networks, peak efficiency values over 70% may be obtained. Control strategies based on carrier bursting, switching frequency modulation, or outphasing are also shown to be feasible. Taking advantage of their improved dynamic response, when compared to low-frequency more traditional switched-mode converters, a class \E^3 polar transmitter for the EDGE standard has been designed and tested at 770 MHz, offering an average global efficiency over 46% at 4.3 W of output power, through RF-based amplitude and phase constituting branches. Finally, the potential of such a high frequency of operation in terms of power density is explored, absorbing undesired coil parasitics for the original LC series interconnecting network in a 1-GHz design methodology. [ABSTRACT FROM AUTHOR]

Published
2012
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