Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloEnvelope Tracking of an RF High Power Amplifier With an 8-Level Digitally Controlled GaN-on-Si Supply Modulator
Anno di pubblicazione2015
Formato
  • Elettronico
  • Cartaceo
Autore/iFlorian, Corrado; Cappello, Tommaso; Paganelli, Rudi Paolo; Niessen, Daniel; Filicori, Fabio
Affiliazioni autoriDepartment of Electrical, Electronic and Information Engineering (DEI), University of Bologna, Bologna 40136, Italy Department of Electrical, Electronic and Information Engineering (DEI), University of Bologna, Bologna 40136, Italy National Research Council, Institute of Electronics, Computer and Telecommunication Engineering (CNR-IEIIT), Bologna 40136, Italy Department of Electrical, Electronic and Information Engineering (DEI), University of Bologna, Bologna 40136, Italy Department of Electrical, Electronic and Information Engineering (DEI), University of Bologna, Bologna 40136, Italy
Autori CNR e affiliazioni
  • RUDI PAOLO PAGANELLI
Lingua/e
  • inglese
AbstractThis paper presents an envelope tracking (ET) transmitter architecture based on the combination of a novel 3-bit supply modulator and digital predistortion (DPD). The proposed power converter is based on a direct digital-to-analog conversion architecture that implements the binary-coded sum of N isolated dc voltages, allowing the synthesis of an output waveform with L = 2(N) voltage levels, with a binary distribution in the range Delta V = V-M - V-O (maximum voltage V-M, offset voltage V-O). This solution provides a better voltage resolution V-S = Delta V/(2(N) - 1) with respect to typical multilevel switched-sources topologies (V-S = Delta V/N). The improved voltage resolution enables the correction of the residual discretization error in the ET transmitter by means of DPD of the RF signal without the need of an auxiliary linear envelope amplifier. The proposed ET solution has been tested with an L-band 30-W lateral-diffused MOS RF high power amplifier (RF HPA) with 1.4- and 10-MHz long-term-evolution signals. In these conditions the converter demonstrated 92% and 83% efficiency, respectively, whereas the congregate efficiency of the transmitter are 38.3% and 23.9% at 5.5 and 1.9 W of average RF output power, respectively. These performances correspond to an improvement of 17.2 and 17.9 points for the power-added efficiency of the RF HPA and to 13.4 and 13 points of improvement for the efficiency of the entire transmitter with respect to fixed bias operation.
Lingua abstractinglese
Altro abstract-
Lingua altro abstract-
Pagine da2589
Pagine a2602
Pagine totali14
RivistaIEEE transactions on microwave theory and techniques
Attiva dal 1963
Editore: Professional Technical Group on Microwave Theory and Techniques, Institute of Electrical and Electronics Engineers, - New York, N.Y.
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 0018-9480
Titolo chiave: IEEE transactions on microwave theory and techniques
Titolo proprio: IEEE transactions on microwave theory and techniques.
Titolo abbreviato: IEEE trans. microwave theor. tech.
Titoli alternativi:
  • Institute of Electrical and Electronics Engineers transactions on microwave theory and techniques
  • I.E.E.E. transactions on microwave theory and techniques
  • Transactions on microwave theory and techniques
  • Microwave theory and techniques
Numero volume della rivista63
Fascicolo della rivista8
DOI10.1109/TMTT.2015.2447552
Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)
  • ISI Web of Science (WOS) (Codice:000359370900021)
  • Scopus (Codice:2-s2.0-84939228792)
  • INSPEC (Codice:15346072)
Parole chiaveEnvelope amplifier, envelope tracking (ET), GaN technology, multilevel converters, power digital-to-analog converter (power-DAC), supply modulator
Link (URL, URI)http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7153567
Titolo parallelo-
Data di accettazione-
Note/Altre informazioni-
Strutture CNR
  • IEIIT — Istituto di elettronica e di ingegneria dell'informazione e delle telecomunicazioni
Moduli CNR-
Progetti Europei-
Allegati
PowerDAC (documento privato )
Tipo documento: application/pdf