The paper discusses the bandwidth extension of a second-harmonic tuned GaN Doherty power amplifier: the adopted strategy relies on output wideband compensation stages and input broadband matching. The single-band (3.5 GHz) and the wide-band (3–3.6 GHz) power amplifiers are compared in terms of building blocks design strategy. The performances, experimentally characterized in single- and two-tone conditions, are close to the state-of-the art for these applications, and confirm the validity of the bandwidth extension approach. In fact, output power of more than 43dBm and 6dB back-off efficiency of around 40% are maintained by the bandwidth extension strategy, as well as intermodulation ratio values. Furthermore, digital baseband predistortion is successfully applied to both stages.

Bandwidth extension of GaN Doherty power amplifier: Effect on power, efficiency and linearity / Camarchia, Vittorio; Fang, Jie; Ghione, Giovanni; JAVAN KHOSHKHOLGH, Amir; MORENO RUBIO, JORGE JULIAN; Pirola, Marco; Quaglia, Roberto; Ramella, Chiara. - STAMPA. - Unico:(2013), pp. 1-4. ((Intervento presentato al convegno 2013 IEEE International Wireless Symposium (IWS) tenutosi a Beijing nel Aprile 2013 [10.1109/IEEE-IWS.2013.6616789].

Bandwidth extension of GaN Doherty power amplifier: Effect on power, efficiency and linearity

CAMARCHIA, VITTORIO;FANG, JIE;GHIONE, GIOVANNI;JAVAN KHOSHKHOLGH, AMIR;MORENO RUBIO, JORGE JULIAN;PIROLA, Marco;QUAGLIA, ROBERTO;RAMELLA, CHIARA
2013

Abstract

The paper discusses the bandwidth extension of a second-harmonic tuned GaN Doherty power amplifier: the adopted strategy relies on output wideband compensation stages and input broadband matching. The single-band (3.5 GHz) and the wide-band (3–3.6 GHz) power amplifiers are compared in terms of building blocks design strategy. The performances, experimentally characterized in single- and two-tone conditions, are close to the state-of-the art for these applications, and confirm the validity of the bandwidth extension approach. In fact, output power of more than 43dBm and 6dB back-off efficiency of around 40% are maintained by the bandwidth extension strategy, as well as intermodulation ratio values. Furthermore, digital baseband predistortion is successfully applied to both stages.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2517288
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