This paper presents the design concept and experimental evaluation of a Doherty Power Amplifier for WiMAX applications at 3.5 GHz. The amplifier, exploiting a packaged GaN HEMT from Cree Inc., shows a saturated output power exceeding 43.5 dBm (22 W), a Doherty high efficiency region of 7 dB, with a first peak efficiency of 57% and maximum drain efficiency of 65 % at the amplifier saturation. The amplifier has been characterized first at RF in continuous wave, and then with a WiMAX modulated input signal with 7dB PAPR, therefore allowing for a digital predistortion scheme to be extracted. The linearized amplifier shows more than 10dB ACPR reduction with respect to the unpredistorted case, while maintaining the same output power of 37.2 dBm (5W), and the same average efficiency of 51%.

Design and baseband predistortion of a 43.5 dBm GaN Doherty amplifier for 3.5 GHz WiMAX applications / Fang, Jie; Quaglia, Roberto; MORENO RUBIO, JORGE JULIAN; Camarchia, Vittorio; Pirola, Marco; DONATI GUERRIERI, Simona; Ghione, Giovanni. - STAMPA. - Unico:(2011), pp. 256-259. (Intervento presentato al convegno European Microwave Conference tenutosi a Manchester nel 8-14 Ottobre 2011).

Design and baseband predistortion of a 43.5 dBm GaN Doherty amplifier for 3.5 GHz WiMAX applications

FANG, JIE;QUAGLIA, ROBERTO;MORENO RUBIO, JORGE JULIAN;CAMARCHIA, VITTORIO;PIROLA, Marco;DONATI GUERRIERI, Simona;GHIONE, GIOVANNI
2011

Abstract

This paper presents the design concept and experimental evaluation of a Doherty Power Amplifier for WiMAX applications at 3.5 GHz. The amplifier, exploiting a packaged GaN HEMT from Cree Inc., shows a saturated output power exceeding 43.5 dBm (22 W), a Doherty high efficiency region of 7 dB, with a first peak efficiency of 57% and maximum drain efficiency of 65 % at the amplifier saturation. The amplifier has been characterized first at RF in continuous wave, and then with a WiMAX modulated input signal with 7dB PAPR, therefore allowing for a digital predistortion scheme to be extracted. The linearized amplifier shows more than 10dB ACPR reduction with respect to the unpredistorted case, while maintaining the same output power of 37.2 dBm (5W), and the same average efficiency of 51%.
2011
9781612842363
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2422868
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo