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dc.contributor.authorBenito, Adán L.
dc.contributor.authorRuiz, María Nieves
dc.contributor.authorGarcía García, José Ángel
dc.contributor.authorGilabert Pinal, Pere Lluís
dc.contributor.authorMontoro López, Gabriel
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.identifier.citationBenito, A. L., Ruiz, M. N., García, J., Gilabert, Pere L., Montoro, G. Seguimiento de la envolvente con ganancia constante mediante esquema outphasing en tecnología GaN HEMT. A: Simposium Nacional de la Unión Científica Internacional de Radio. "URSI 2015: libro de actas". Pamplona: Unión Científica Internacional de Radio (URSI), 2015, p. 1-4.
dc.description.abstractA UHF outphasing transmitter, based on parallelcircuit Class E power amplifiers (PAs) and implementing a constant-gain envelope tracking strategy, is presented in this paper. Using the nonlinear model of the selected GaN HEMT device, the drain terminating and biasing networks are designed to provide near optima impedance values at the fundamental and higher order harmonics. A relatively wideband performance, 630-890 MHz, is obtained with an efficiency above 80%, besides being amenable for load-modulation. Thanks to the use of a series Chireix combiner, followed by an impedance transformer, an outphasing scheme is implemented. Once characterized in a pure output power phase-coding regime, the observed limitation in dynamic range is overcome by operating the amplifiers in a sort of continuous class J mode, while introducing a sort of ISOGAIN load envelope tracking strategy. A 1c-WCDMA signal, with a peak-to-average power ratio of 8.4 dB is shown to be reproduced, satisfying the linearity requirements, with an average power efficiency of 58%.
dc.format.extent4 p.
dc.publisherUnión Científica Internacional de Radio (URSI)
dc.subjectÀrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència
dc.subject.lcshPower amplifiers
dc.titleSeguimiento de la envolvente con ganancia constante mediante esquema outphasing en tecnología GaN HEMT
dc.typeConference report
dc.subject.lemacAmplificadors de potència
dc.contributor.groupUniversitat Politècnica de Catalunya. CSC - Components and Systems for Communications Research Group
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
upcommons.citation.authorBenito, A. L., Ruiz, M. N., García, J., Gilabert, Pere L., Montoro, G.
upcommons.citation.contributorSimposium Nacional de la Unión Científica Internacional de Radio
upcommons.citation.publicationNameURSI 2015: libro de actas

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